CLASS 318, ELECTRICITY: MOTIVE POWER SYSTEMS |
1 | ELECTRIC MOTOR WITH NONMOTOR DRIVING MEANS (E.G., AXLE DRIVE, MANUAL DRIVE): |
This subclass is indented under the class definition. Subject matter in which one or more electric motors are
combined with one or more means (other than a motor) for
driving or actuating one or more load devices, e.g., axle drives.
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2 | . Manual driving means: |
This subclass is indented under subclass 1. Subject matter in which one or more electric motors are
combined with manually actuated means for driving or actuating one
or more load devices.
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3 | WITH PARTICULAR MOTOR-DRIVEN LOAD DEVICE: |
This subclass is indented under the class definition. Subject matter in which one or more electric motors are
connected or arranged to be connected to actuate one or more particular
or specific load devices which load devices must constitute a significant
part of the combination; and in which means are also provided
for controlling or supplying electric energy to the electric motor
or motors.
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4 | . Plural, diverse or diversely controlled load device: |
This subclass is indented under subclass 3. Subject matter in which there are two or more particular
load devices driven by one or more electric motors and in which
one or more of the load devices are structurally different from
or are operated or controlled differently (e.g., with respect
to time, mode or degree of operation or control, particular
means employed to effect the operation or control) than
one or more of the other of the load devices.
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5 | .. Plural motor drive: |
This subclass is indented under subclass 4. Subject matter in which two or more electric motors are
provided to drive the driven devices and in which one of the motors
is arranged to drive one of the driven devices and another of the
motors is arranged to drive another of the driven devices; or, in
which one of the motors is supplied with electrical energy differently
or is controlled differently with respect to time, load, speed, etc., from
another of the motors, or in which one of the motors is
substantially different structurally from another motor.
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6 | . Tension-maintaining type of motor-control system: |
This subclass is indented under subclass 3. Subject matter in which means are provided for controlling
one or more electric motors so as to control the tension or tautness
in a material being driven, conveyed, or otherwise
moved by the motor at some predetermined value or within some predetermined
limits.
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7 | .. Plural, diverse or diversely controlled motors: |
This subclass is indented under subclass 6. Subject matter in which two or more motors are controlled
and in which one or more of the motors are controlled differently
from one or more other of the motors.
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8 | . Plural, diverse or diversely controlled driving motors (e.g., driving differential gearing): |
This subclass is indented under subclass 3. Subject matter in which two or more electric motors are
employed to drive a particular load device and in which one or more
of the motors (1) are substantially different, structurally, or (2) are
controlled or operated differently with respect to time, load, speed, etc., from
one or more other of the motors.
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9 | . Power- or motion-transmitting mechanism: |
This subclass is indented under subclass 3. Subject matter in which the particular motor driven device
comprises means for receiving and transmitting mechanical power, torque, force, or
motion from the electric motor to some load device adapted to be
actuated thereby.
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10 | .. Reversible drive mechanism: |
This subclass is indented under subclass 9. Subject matter in which the means driven by the motor is
adapted to drive a load shaft or device in a forward and in a reverse
direction without reversing the direction of operation of the motor.
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11 | .. Variable speed mechanism: |
This subclass is indented under subclass 9. Subject matter in which the transmitting mechanism is adapted
to drive a load device at two or more speeds for a given single
speed of the electric motor.
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12 | ... Gearing: |
This subclass is indented under subclass 11. Subject matter in which the variable speed transmission
is mechanical gearing provided with means for producing two or more
output speeds when the input or receiving element thereof is being
driven at a single speed.
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13 | .... Differential type: |
This subclass is indented under subclass 12. Subject matter in which the variable speed gearing is a
differential gearing with means for varying the output speed of
the gearing when the speed of the driving electric motor is at a predetermined
single value.
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14 | .. Motion-converting mechanism: |
This subclass is indented under subclass 9. Subject matter in which the power transmitting mechanism
is a device which receives a force or motion from an electric motor
having one type or kind of motion (i.e., rotary, linear, etc.) and
delivers the force or motion by an element of the device which moves
with a different type or kind of motion (i.e., linear, reciprocating, rotary, etc.).
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15 | .. Mechanical gearing: |
This subclass is indented under subclass 9. Subject matter in which the power transmitting mechanism
is a mechanical gearing or gear.
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16 | SUPPLIED OR CONTROLLED BY SPACE-TRANSMITTED ELECTROMAGNETIC OR ELECTROSTATIC ENERGY (E.G., BY RADIO): |
This subclass is indented under the class definition. Subject matter in which the electric motor is supplied with
and/or controlled by electric space-transmitted
electromagnetic or electrostatic energy. (e.g., radio
energy).
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17 | PORTABLE-MOUNTED MOTOR AND/OR PORTABLE-MOUNTED ELECTRICAL SYSTEMS THEREFOR: |
This subclass is indented under the class definition. Subject matter in which means are provided for portably
supporting an electric motor or the electrical system of supply
and/or control therefor, the supporting means
being particularly adapted for moving the motor or the system from
one place to a different place.
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560 | POSITIONAL SERVO SYSTEMS (E.G., SERVOMECHANISMS): |
This subclass is indented under the class definition. Subject matter comprising a system which maintains a prescribed
relationship between the position of a member or a function of the
position and the value of a arbitrarily varied command signal by
detecting an error between the actual position of the member or the
actual value of the function of the position and the position or
value commanded by the signal and controlling a motor of the servo
system in response to the detected error.
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561 | . Adaptive or optimizing systems including "bang-bang" servos: |
This subclass is indented under subclass 560. Subject matter in which the system may include means to
measure or evaluate its own performance and automatically adjust
one or more of its parameters in response to a change in internal
or external environmental conditions, or where the system
has been initially designed for optimum performance such as a bang-bang
servo.
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562 | . Time-sharing or multiplexing systems: |
This subclass is indented under subclass 560. Subject matter in which the system includes at least one
element or one data-transmission link common to two or
more servo loops and include in each of the loop on either a time sharing
or multiplexing basis.
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563 | . With protective or reliability increasing features (e.g., "fail-safe" systems): |
This subclass is indented under subclass 560. System in which the system includes means to protect or
guard against system failure.
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564 | .. "Redundant" operating channels: |
This subclass is indented under subclass 563. Subject matter in which the system includes a plurality
of channels arranged such that should a failure occur in one channel, operation
of the system is maintained by the remaining channel or channels.
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565 | .. Monitoring systems: |
This subclass is indented under subclass 563. Subject matter in which the system includes one or more
elements whose sole function is to test or monitor the performance
of similar elements in the servo loop and to disable the servo upon
a failure of one of the similar elements.
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566 | .. Maneuver, force, or load-limiting: |
This subclass is indented under subclass 563. Subject matter in which means are provided for limiting
the response of the system to excessive or large error signals.
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567 | . Program- or pattern-controlled systems: |
This subclass is indented under subclass 560. Subject matter having means whereby the command signal for
the system is varied in response to a predetermined program or pattern thereby
establishing a predetermined pattern or schedule for the positions
of the controlled member.
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568.1 | .. With program recording or composing means: |
This subclass is indented under subclass 567. Subject matter including means for initially producing the program of control instructions to which the system subsequently responds. | |
568.11 | ... Multifunction manipulator (i.e., Robot): |
This subclass is indented under subclass 568.1. Subject matter wherein the system is a reprogrammable multifunction
manipulator designed to move devices through variable programmed
motions for the performance of changeable tasks on a repetitive
basis without human intervention.
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568.12 | .... Mobile robot: |
This subclass is indented under subclass 568.11. Subject matter in which the robot includes a base which
is moveable without restraint under the control of a programmable guidance
system.
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568.13 | .... With particular program teaching method: |
This subclass is indented under subclass 568.11. Subject matter including methods of instructing or programming
the robot to perform the steps of a desired sequence of manipulations.
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568.14 | ..... Manual lead through: |
This subclass is indented under subclass 568.13. Subject matter wherein the robot is "taught" the
steps of a desired sequence of manipulations by actual performance
of the steps while the robot"s control system is in a memory mode, with
the robot subsequently performing the memorized sequence without human
intervention.
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568.15 | .... With particular interpolation means: |
This subclass is indented under subclass 568.11. Subject matter in which the motion of the robot is defined
by a plurality of discrete points along the path to be followed
and a means is provided for generating continuous motion between
the points.
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568.16 | .... With particular sensing device: |
This subclass is indented under subclass 568.11. Subject matter in which a particular sensing device is used
in monitoring or control of the robot.
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568.17 | .... With multimode control (e.g., course-fine, position-force, etc.): |
This subclass is indented under subclass 568.11. Subject matter in which more than one mode of control is
provided.
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568.18 | ..... Including velocity control: |
This subclass is indented under subclass 568.17. Subject matter wherein one of the modes of control is control
of velocity (including acceleration and deceleration).
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568.19 | .... With particular coordinate transformation means: |
This subclass is indented under subclass 568.11. Subject matter in which a transformation is made either (a), from
one coordinate system to another (e.g., spherical
polar coordinates to cartesian coordinates), or (b) from
one reference frame to another (e.g., a
reference frame associated with an "end effector" to
a reference frame associated with the base of the robot).
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568.2 | .... With plural control systems (e.g., the interaction of plural processors to control the plural joints of a single robot: |
This subclass is indented under subclass 568.11. Subject matter in which (a) plural robots
interact, (b) a robot interacts with
a numerically controlled machine tool or conveyor, or (c) plural
computers interact in the control of a single robot.
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568.21 | ..... Including end effector (e.g., gripping jaw, micromanipulator, etc.): |
This subclass is indented under subclass 568.2. Subject matter including a device, usually attached
to the robot arm, which extends the capability of the robot
by one or more degrees of freedom.
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568.22 | .... With particular compensation (e.g., gain, offset, etc.): |
This subclass is indented under subclass 568.11. Subject matter in which provision is made for improving
the performance of a robot by applying a correction to a control
instruction to compensate for a predictable inaccuracy in the positioning
of the robot.
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568.23 | ..... Including program modification: |
This subclass is indented under subclass 568.22. Subject matter wherein the correction is applied by modifying
the control program so that future repetitions of the robot"s actions
are precompensated.
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568.24 | .... With reliability enhancement means (e.g., monitoring, redundant circuits, etc.): |
This subclass is indented under subclass 568.11. Subject matter in which means are provided for monitoring
the performance of the robot and appropriate actions are taken in
the event a fault is detected.
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568.25 | ..... Including display device: |
This subclass is indented under subclass 568.24. Subject matter including means for displaying information
relevant to locating and diagnosing faults in the robot or its control
system.
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569 | .. Digital or numerical systems: |
This subclass is indented under subclass 560. Subject matter including digital or numerical systems wherein
the control system programming means utilizes numerical values, digital signals
or coded pulses corresponding to desired positions of the control.
Usually these numerical or digital signals are recorded on punched
cards, punched tapes, magnetic tapes, or
optical tapes.
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570 | ... Contouring systems: |
This subclass is indented under subclass 569. Subject matter in which motion of a member along two or more axes is controlled simultaneously to provide a continuous predetermined path along which the member is directed. | |
571 | .... With "feed-rate" control: |
This subclass is indented under subclass 570. Subject matter in which means are provided for controlling the tangential velocity of the member along the path. | |
572 | .... With "zero-offset" or tool radius correction: |
This subclass is indented under subclass 570. Subject matter in which means are provided for (1) varying the reference points from which the coordinates of the system are measured or (2) compensating the system for variation in the diameter of the tool, such compensation being precalculated. | |
573 | .... With interpolating means: |
This subclass is indented under subclass 570. Subject matter in which the input data is represented by a plurality of discrete points along the path to be followed and the system includes means to interpolate between the points so that the ultimate servo command is a smoothly varying function. | |
574 | .... Multiple axes point to point systems: |
This subclass is indented under subclass 569. Subject matter in which the system programming means directs a member to move from a first point having a first set or coordinates to a second point having a second set of coordinates and in which the path taken by the member between points is not a material consideration. | |
575 | .. Multiple axes analog systems: |
This subclass is indented under subclass 560. Subject matter wherein the program input is a pattern in analog form, and means responsive thereto being used to position a member along one or more axes. | |
576 | ... Nonmechanical line, seam or edge followers: |
This subclass is indented under subclass 575. Subject matter in which the pattern to be followed is provided
by a line, seam, or edge and the pattern follower
is non-mechanical.
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577 | .... Optical or photoelectric line followers: |
This subclass is indented under subclass 576. Subject matter in which the means to sense the line, seam
or edge is a photoelectric means.
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578 | ... Cam or template followers: |
This subclass is indented under subclass 575. Subject matter in which the pattern to be followed is provided
by a cam or template.
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579 | ... Multiple pass systems: |
This subclass is indented under subclass 575. Subject matter in which the system controlled makes a plurality
of passes of ever increasing precision.
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580 | . Vehicular guidance systems with single axis control: |
This subclass is indented under subclass 560. Subject matter in which the servomechanism guides a vehicle
about a single axis, wherein the novelty is chiefly in
the servomechanism and not in the guidance system.
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581 | .. Radio-controlled: |
This subclass is indented under subclass 580. Subject matter in which the steering control signal is obtained
by radio.
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582 | .. Celestial navigation: |
This subclass is indented under subclass 580. Subject matter in which the steering control is obtained
by celestial means.
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583 | .. Landing systems: |
This subclass is indented under subclass 580. Subject matter in which the steering control is a landing
system.
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584 | .. Altitude or pitch control: |
This subclass is indented under subclass 580. Subject matter in which the steering control is an altitude
or pitch control.
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585 | .. Roll control: |
This subclass is indented under subclass 580. Subject matter in which the steering control is a "Roll" control.
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586 | .. Yaw control: |
This subclass is indented under subclass 580. Subject matter in which the steering control is a "Yaw" control.
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587 | .. Land vehicles: |
This subclass is indented under subclass 580. Subject matter in which the steering control is for a land
vehicle.
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588 | .. Marine vehicles: |
This subclass is indented under subclass 580. Subject matter in which the steering control is for a marine
vehicle.
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589 | ... Submarine and torpedo systems: |
This subclass is indented under subclass 588. Subject matter in which the marine vehicle is a submarine
or torpedo.
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590 | . Multiple mode systems: |
This subclass is indented under subclass 580. Subject matter in which the servomechanism may operate or
be operated in a plurality of different modes.
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591 | .. With mode-engagement features (e.g., manual to automatic): |
This subclass is indented under subclass 590. Subject matter in which the servomechanism includes features
to provided for smooth transition from one operating mode to the
next.
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592 | .. Fine and coarse systems: |
This subclass is indented under subclass 590. Subject matter in which a plurality of position error detectors, one
for each operating mode, are provided. The first
of these position error detectors provides a coarse signal which
is indicative of the rough or approximate final position. When
the "coarse" position is approached, the "fine" position
error detectors successively take over and precisely direct the servo
to it final position. Complete servo control is thus realized
at all time.
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593 | ... Separate fine and coarse motors: |
This subclass is indented under subclass 592. Subject matter in which separate servo motors are provided
for each of the operating modes.
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594 | ... Digital systems: |
This subclass is indented under subclass 592. Subject matter in which the system in at least one operating
mode is controlled by digital means.
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595 | ... Multiple speed synchro systems: |
This subclass is indented under subclass 592. Subject matter in which the position error detectors for
each mode are synchros. A synchro is a rotary position
sensing transformer. The different speeds are usually
obtained by use of a gear train.
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596 | .. Combined "on-off" and proportional control: |
This subclass is indented under subclass 590. Subject matter in which the servo system includes means
responsive to the error signal to operate the servo full on or completely
off until a desires position operating range is attained at which
point a proportional control means assumes control to bring the
servo to a predetermined final position.
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597 | .. Slewing systems: |
This subclass is indented under subclass 590. Subject matter in which the servo system, includes
means which, in response to a predetermined type of error
signal saturates and applies maximum power to the servo motor. During
this mode of operation, the error signal loses control
of the servo motor which runs at maximum rate toward its ultimate
position. This mode is defined as the "slewing" mode. Means
are provided whereby the error signal regains control under the
proper conditions.
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598 | ... With a separate slewing motor: |
This subclass is indented under subclass 597. Subject matter in which a separate "slewing" motor is provided when the system operates in the "slewing" mode. | |
599 | . Pulse-width modulated power input to motor (e.g., "duty cycle" systems): |
This subclass is indented under subclass 580. Subject matter in which electric power pulses of fixed magnitude
and variable width are periodically applied and removed from the
servo motor. The variation in width is in accordance with
the servo error signal.
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600 | . Digital or numerical systems: |
This subclass is indented under subclass 560. Subject matter in which the command signal is digital or
numerical. A digital or numerical command is one which
is composed of one or more discrete symbols which may form a code. These
symbols may take the form of any of the following examples: (1) The
presence or absence of a discrete value of electrical voltage or
current; (2) The presence or absence
of a perforated hole in a tape or card; (3) The
presence or absence of a discrete mechanical movement; (4) The
making or breaking of an electrical switch. The above
examples are not exclusive but merely representative.
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601 | .. Digital comparison: |
This subclass is indented under subclass 600. Subject matter in which the system error signal is obtained
by comparison of the digital command signal with a position feedback signal which is also in digital form.
Included herein are systems in which the position feedback includes
an analog to digital converter for generating the feedback in digital
form.
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602 | ... Commutating switch-type encoder: |
This subclass is indented under subclass 601. Subject matter in which the digital position feedback is
obtained from a commutating switch encoder, which encoder
usually converts position information of analogue to digital form.
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603 | .. Pulse-counting systems: |
This subclass is indented under subclass 600. Subject matter in which a counting means acts as the comparator
between the command signal and the position signal.
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604 | .. Analogue comparison: |
This subclass is indented under subclass 600. Subject matter in which the digital command signal is converted
to an analog signal which is compared with an analog position signal
to form the system error signal.
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605 | ... Synchro or resolver (e.g., transmitter simulators): |
This subclass is indented under subclass 604. Subject matter in which the analog comparison is by means
of a synchro or resolver system. A synchro is a rotary
transformer used for the instantaneous electrical transmission or
reception of the angular position data of rotating parts.
A resolver is a rotary transformer for resolving a vector into two
mutually perpendicular components, such as translating
error angle into electrical information corresponding to sine and
cosine of rotor angle.
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606 | . Frequency- or phase-modulated systems: |
This subclass is indented under subclass 560. Subject matter in which modulator means are provided wherein
the command signal or feedback signal either frequency modulates, or phase
modulates a system carrier. The system carrier is a wave
suitable for being modulated to transmit intelligence.
The modulation represents the information, and the original
wave is used only as the carrier of the modulation. Combinations
of phase and frequency modulation are commonly referred to as frequency modulation.
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607 | .. Frequency comparison: |
This subclass is indented under subclass 606. Subject matter in which the system includes a reference
signal of the same frequency as the carrier frequency which is used
with means to compare it with the modulated signal to obtain the
modulating wave.
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608 | .. Phase comparison: |
This subclass is indented under subclass 606. Subject matter in which the system includes a reference
signal of the same frequency as the carrier frequency and of a fixed
phase which is used with means to compare it with the phase modulated
signal to obtain the modulating wave.
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609 | . "Reset" systems (P.I.): |
This subclass is indented under subclass 560. Subject matter in which two error detectors are provided:
One which detects the instantaneous positional errors and attempts
to immediately correct for them. This detector contributes what
is termed "proportional" control to the system.
The second error detector senses the instantaneous position with
respect to the long term average position. This detector
contributes what is a termed "reset" or "integral" control
to the system. The two signals are summed to provide a
composite system error signal.
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610 | .. With rate (P. I. D.) (e.g., reset windup prevention): |
This subclass is indented under subclass 609. Subject matter in which a third error detector is provided
which detects the rate of change of the position and contributes
what is termed a "rate" or "differential" control
to the system. This rate signal is also summed with the
two previous signal to provided a composite system error signal.
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611 | . With stabilizing features (e.g., anti-hunting, damping): |
This subclass is indented under subclass 560. Subject matter in which the system includes stabilizing
means which prevents hunting and minimizes overshooting of the commanded position.
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612 | .. Electric braking near balance (e.g., dynamic): |
This subclass is indented under subclass 611. Subject matter in which the stabilizing means is by electrical
means such as dynamic braking of the servo motors as the system
approaches balance. Dynamic braking is forcing the motor to
act as a generator which thus absorbs its rotational energy.
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613 | ... D.C. in A.C. windings: |
This subclass is indented under subclass 612. Subject matter in which dynamic braking is achieved by introducing
DC into the windings of an AC servo motor.
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614 | .. Friction-braking near balance including magnetic or eddy current brakes: |
This subclass is indented under subclass 611. Subject matter in which the stabilizing means is by friction
braking as the system approaches balance.
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615 | .. By auxiliary feedback loop: |
This subclass is indented under subclass 611. Subject matter in which the stabilizing means employees a separate auxiliary feedback loop in addition to the positional feedback loop. | |
616 | ... Rate feedback: |
This subclass is indented under subclass 615. Subject matter in which the auxiliary feedback loop senses
the rate of positioning and introduces a signal proportional to
the rate into the servo loop to reduce the magnitude of the servo error
signal as the final position is approached.
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617 | .... Variable rate feedback: |
This subclass is indented under subclass 616. Subject matter in which the rate sensing circuit is made
variable to further enhance the stabilizing effect.
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618 | .... Tachometer feedback: |
This subclass is indented under subclass 616. Subject matter in which the means to sense the rate is an
electrical tachometer.
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619 | .. Variable gain bandwidth: |
This subclass is indented under subclass 611. Subject matter in which the stabilizing means is a means
for changing the gain of the servo loop of its bandwidth.
The bandwidth is the upper and lower limit of frequencies to which the
servo will respond.
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620 | .. Nonlinear circuits: |
This subclass is indented under subclass 611. Subject matter in which the stabilizing means is a nonlinear
circuit.
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621 | .. Lead or lag networks: |
This subclass is indented under subclass 611. Subject matter in which the stabilizing means is a lead
or lag circuit or a combination of both. A "lead" circuit
is defined as a circuit whose output voltage leads the input voltage
over a certain range of frequencies. Sometimes it may be
referred to as an "integrating" circuit.
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622 | ... A.C. networks: |
This subclass is indented under subclass 621. Subject matter in which the lead and lag circuit is adapted
for use in an AC servo loop.
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623 | .. Load stabilization (e.g., viscous, magnetic or friction dampers): |
This subclass is indented under subclass 611. Subject matter in which the stabilizing means is a load
stabilizer where the positioned load may have appreciable inertia.
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624 | .. By deadband at null (e.g., threshold circuits): |
This subclass is indented under subclass 611. Subject matter in which the stabilizing means is a deadband
in the servo loop which requires the servo error signal to be of
a predetermined threshold magnitude before any control takes place.
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625 | . Plural servomotors: |
This subclass is indented under subclass 560. Subject matter in which the system includes more than one motor. | |
626 | . Limit or end-stop control: |
This subclass is indented under subclass 560. Subject matter in which means are provided to prevent the
servo loop from driving the positioned member beyond predetermined
limits.
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627 | .. Secto-scanning systems: |
This subclass is indented under subclass 560. Subject matter in which the servo system scans the sector between the limit stops. | |
628 | . "Feelback" systems: |
This subclass is indented under subclass 560. Subject matter in which the servo system is a "Feelback" system. "Feelback" is
that characteristic of a servo system in which the servo system
does not apply all the force required in positioning the member, but
is a manual assist device.
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629 | . Unwanted harmonic or voltage component elimination quadrature rejection systems: |
This subclass is indented under subclass 560. Subject matter in which means are provided to eliminate
from any of the servo loop signals an unwanted harmonic, an
undesirable voltage component, or a quadrature component.
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630 | . Antibacklash systems (e.g., with unidirectional approach to balance): |
This subclass is indented under subclass 560. Subject matter in which some means to prevent "backlash" is
provided to increase the accuracy of the positioned member. "Backlash" is
an inherent inaccuracy more or less present in ever mechanical device
caused by the "give" between parts.
Backlash is also present in electrical components. Included
herein are systems which do not specifically recite the term "backlash" but
effectively compensate for it by always approaching balance from
the same direction.
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631 | . Antistatic friction features (e.g., "dither" voltage): |
This subclass is indented under subclass 560. Subject matter in which means are provided to eliminate
static friction. Static friction is usually higher than
running friction and has a deleterious effect on servo performance.
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632 | . With compensating features: |
This subclass is indented under subclass 560. Subject matter in which a compensating means is provided
to improve servo performance.
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633 | .. "Two-cycle error" compensation: |
This subclass is indented under subclass 560. Subject matter in which the compensating means compensates
for "Two cycle error". "Two
cycle error" is that characteristic of a position sensing
device, usually caused by finite mechanical tolerances, which
causes the device to exhibit a non-random error during each
cycle of operation which repeats itself twice.
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634 | .. Temperature compensation: |
This subclass is indented under subclass 632. Subject matter in which the compensating means compensates
for temperature effects on the servo.
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635 | . With signal-, voltage-, or current-limiting: |
This subclass is indented under subclass 560. Subject matter in which means are provided to limit the
magnitude of a servo signal, or some voltage or current
in the servo system.
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636 | . "Sampling" systems including miscellaneous "sampled data" control systems: |
This subclass is indented under subclass 560. Subject matter in which a servo signal is not continuously
measured, but is periodically sampled at a rate high enough
so that there are no deleterious effects on servo performance. Also
included herein are that class of servomechanisms termed "sample
data" control systems.
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637 | . Analog computation: |
This subclass is indented under subclass 560. Subject matter in which included in the system is same form
of analog computation. In other words, a mathematical
problem solving servomechanism.
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638 | . With particular "error-detecting" means: |
This subclass is indented under subclass 560. Subject matter in which a particular error detecting means is provided. An error detector is a device which compares the command signal with the feedback signal and produces an error signal related to the difference between these signals. | |
639 | .. Plural, diverse conditions: |
This subclass is indented under subclass 638. Subject matter in which the error detector is responsive
to plural, diverse conditions.
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640 | .. Photoelectric or optical-type measuring instruments: |
This subclass is indented under subclass 638. Subject matter in which the error detector is a radiant
energy photoelectric or optical measuring instrument.
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641 | .. With particular temperature measuring instrument: |
This subclass is indented under subclass 638. Subject matter in which the error detecting means is a temperature
measuring instrument.
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642 | .. With liquid level measuring instruments: |
This subclass is indented under subclass 638. Subject matter in which the error detecting means is a liquid
level measuring instrument.
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643 | .. With moisture content or wetness measuring instruments: |
This subclass is indented under subclass 638. Subject matter in which the error detecting means is a moisture
content or wetness measuring instrument.
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644 | .. With flow measuring instruments: |
This subclass is indented under subclass 638. Subject matter in which the error detecting means is a flow
measuring instrument.
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645 | .. With fluid pressure measuring instruments: |
This subclass is indented under subclass 638. Subject matter in which the error detecting means is a fluid
pressure measuring instrument.
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646 | .. With force or weight measuring instruments: |
This subclass is indented under subclass 638. Subject matter in which the error detecting means is a force
or weight measuring instrument.
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647 | .. With magnetic field measuring instruments: |
This subclass is indented under subclass 638. Subject matter in which the error detecting means is a magnetic
field measuring instrument.
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648 | .. With inertial, direction or inclination measuring instrument: |
This subclass is indented under subclass 638. Subject matter in which the error detecting means is an
inertial, direction, or inclination measuring
instrument.
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649 | ... Stable platforms: |
This subclass is indented under subclass 648. Subject matter in which the measuring instrument includes
a stable platform.
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650 | .. With current, voltage or electrical power measuring instruments: |
This subclass is indented under subclass 638. Subject matter in which the error detecting means is a current, voltage
or electrical power measuring instrument.
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651 | .. With acceleration measuring instruments: |
This subclass is indented under subclass 638. Subject matter in which the error detecting means is an
acceleration measuring instrument.
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652 | .. With particular position measuring instruments: |
This subclass is indented under subclass 638. Subject matter in which the system includes a particular position measuring instrument. | |
653 | ... Magnetic transducers: |
This subclass is indented under subclass 652. Subject matter in which the position measuring instrument
is a magnetic transducer.
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654 | ... Synchro control transmitter-transformer systems: |
This subclass is indented under subclass 652. Subject matter in which the particular position measuring
instrument is a synchro. A synchro is a rotary transformer
used for the instantaneous electrical transmission or reception
of angular position data of rotating parts. Included herein
are systems in which both the command signal and the feedback position
signal are obtained from synchros.
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655 | .... With synchro differential: |
This subclass is indented under subclass 654. Subject matter in which a differential synchro circuit is used. A differential synchro is a synchro in which both the stator and the rotor are relatively rotatable with respect to fixed reference, and the angular positional data obtained from such a device in the sum or difference of the two rotations. | |
656 | ... Differential transformer systems: |
Subject matter under subclasses 652 in which the particular
position measuring instrument is a differential transformer. A
differential transformer is a position indicating transformer with at
least one primary winding and a plurality of secondary windings, the
secondary windings are in bucking or aiding relationship. Some portion
of the magnetic circuit of the transformer will affect the coupling
of the secondary windings in responses to position and the secondary
windings will give a voltage indication of the position sensed.
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657 | .... Linear differential transformer: |
This subclass is indented under subclass 656. Subject matter in which the differential transformer is the linear type. Included herein are relatively movable core and coil type linear differential transformers. A linear differential transformer is one in which the coils and core are physically arranged on line. | |
658 | .... "E" type transformer: |
This subclass is indented under subclass 656. Subject matter in which the differential transformer is of the "E" type. An "E" type differential transformer is one in which the magnetic structure takes the form of an E. | |
659 | .... "Microsyn" type: |
This subclass is indented under subclass 656. Subject matter in which the differential transformer is a "Microsyn" type. A microsyn is a rotary type differential transformer in which the coils and core are relatively angularly movable. | |
660 | .... "Inductosyn" systems: |
This subclass is indented under subclass 652. Subject matter in which the particular position measuring
instrument is an "Inductosyn". An "Inductosyn" is
a rotary or linear synchro-like device in which the rotor
and stator windings move relative to each other in parallel planes. Included
herein are devices in which the rotor and stator windings are printed
circuits.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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661 | .... Resolver systems: |
This subclass is indented under subclass 652. Subject matter in which the particular position measuring
instrument is a resolver. A resolver is a rotary transformer
which has two phase windings on either or both the rotor and stator and
may be used for resolving a vector into two mutually perpendicular
components, such as translating rotor angle into electrical
information corresponding to the sine and cosine of rotor angle.
A resolver may also be considered as a two phase synchro.
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662 | ... Variable capacitor systems: |
This subclass is indented under subclass 652. Subject matter in which the particular position measuring
instrument is a variable capacitor.
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663 | ... Potentiometer systems including autotransformers and Wheatstone bridges: |
This subclass is indented under subclass 652. Subject matter in which the particular position measuring
instrument is a potentiometer. A potentiometer is any
voltage dividing circuit. Included herein are systems
using autotransformers as A C potentiometers. Also included herein
are systems in which the command signal is introduced by one half
of a Wheatstone bridge and the feedback potentiometer forms the
other half of the bridge.
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664 | .... Minor arc seeking: |
This subclass is indented under subclass 663. Subject matter in which the position measuring potentiometer is circular and means are provided to sense the minor arc to be travelled in reaching the commanded position whereby positioning will be achieved in minimum time. | |
665 | .... Continuous rotation, unlimited range: |
This subclass is indented under subclass 663. Subject matter in which the position measuring potentiometer is circular and means are provided to allow continuous rotation of the wiper beyond 360°. | |
666 | .... Controlled tap and slidewire: |
This subclass is indented under subclass 663. Subject matter in which both the mechanical length of the potentiometer and the tap are both controllable. | |
667 | .... With a bridge in the feedback circuit: |
This subclass is indented under subclass 663. Subject matter in which the feedback loop contains a bridge
circuit which does not necessarily null out when the servo loop
is balanced.
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668 | ..... Recalibrating systems: |
This subclass is indented under subclass 667. Subject matter in which the bridge circuit includes means for recalibration. | |
669 | ... Standing wave: |
This subclass is indented under subclass 652. Subject matter in which the particular position measuring instrument is a means for measuring the length of a standing wave. This means may take the form of a resonator, mechanical or electrical, dependent upon the type of wave being measured. | |
670 | ... Contact resistance: |
This subclass is indented under subclass 652. Subject matter in which the particular position measuring instrument is a means for measuring contact resistance. | |
671 | . With particular motor control system responsive to the "actuating signal": |
This subclass is indented under subclass 560. Subject matter in which the servo system includes a particular motor control responsive to the actuating signal. | |
672 | .. Discontinuous or "on-off" control: |
This subclass is indented under subclass 671. Subject matter in which the particular motor control is
the discontinuous or "on-off" type.
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673 | ... Seeking switch type: |
This subclass is indented under subclass 672. Subject matter in which the discontinuous or "on-off" motor
control is part of a "seeking" switch system.
A "seeking" switch system is one in which the
motor moves the wiper of a multiposition noncoded switch until a
circuit which includes the motor and the switch is found which deenergizes
the motor.
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674 | ... Wheatstone bridge type: |
This subclass is indented under subclass 672. Subject matter in which the discontinuous or "on-off" motor
control is controlled by a Wheatstone bridge circuit.
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675 | .. One transmitter or controller element follows another: |
This subclass is indented under subclass 671. Subject matter in which the transmitter or initiating controller
comprises at least two relatively movable parts one of which is
moved to effect starting of the follow-up motor and the other
of which is actuated by the motor or devices driven thereby in a
direction so as to follow the said one part.
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676 | .. Transmitter or controller element returned (e.g., force balance systems): |
This subclass is indented under subclass 671. Subject matter in which means are provided for causing the
follow-up motor to return the transmitter to its normal
or original position at which position the motor is not adapted
to run or operate.
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677 | .. With particular servoamplifier: |
This subclass is indented under subclass 671. Subject matter in which the particular motor control system
includes a particular servoamplifier.
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678 | ... Differential amplifier: |
This subclass is indented under subclass 677. Subject matter in which the particular servoamplifier includes
a differential amplifier. A differential amplifier consists
of two amplifying devices in parallel with a one common path (e.g., common
cathode or common emitter), which senses the difference
between a signal on the control electrode of the first amplifying device
with the signal on the control electrode of the second amplifying
device.
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679 | ... Diverse types of amplifiers in different stage: |
This subclass is indented under subclass 677. Subject matter in which the particular servoamplifier includes
diverse types of amplifiers in the various stages.
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680 | ... Magnetic servoamplifiers: |
This subclass is indented under subclass 677. Subject matter in which the particular servoamplifier is
a magnetic amplifier.
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681 | ... Solid-state servoamplifiers: |
This subclass is indented under subclass 671. Subject matter in which the particular servoamplifier is
a solid-state amplifier.
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682 | ... Rotating amplifier (e.g., "Ward Leonard" control): |
This subclass is indented under subclass 677. Subject matter in which the particular servoamplifier is
a rotating amplifier. For example, a generator
with plural field winding which control current, voltage
or power output. Included herein are "Ward-Leonard" control
systems.
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683 | .. With particular phase discriminator: |
This subclass is indented under subclass 671. Subject matter in which the particular motor control includes
a particular phase discriminator.
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684 | .. With particular modulator or detector (e.g., choppers): |
This subclass is indented under subclass 671. Subject matter in which the particular motor control includes
a particular modulator or detector. Included herein are "chopper" systems.
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685 | .. "Step-by-step" motors in closed-loop servos: |
This subclass is indented under subclass 671. Subject matter in which the particular motor control is
used to control a "Step-by-step" or stepping
motor; and the servo loop is closed by feeding back a position
signal from the motor shaft back to the servo input.
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686 | .. Reciprocating or oscillating motors: |
This subclass is indented under subclass 671. Subject matter in which the particular motor control is
used to control a reciprocating or oscillating motor.
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687 | .. Linear movement motors: |
This subclass is indented under subclass 671. Subject matter in which the particular motor control is
used to control a linear movement motor.
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688 | .. Shaded pole motors: |
This subclass is indented under subclass 671. Subject matter in which the particular motor control is used to control a shaded pole motor. A shaded pole motor is a single phase induction or hysterysis motor where field shifting or distortion means is provided to determine direction of rotation. | |
689 | TORQUING MOTORS: |
This subclass is indented under subclass 671. Subject matter in which the particular motor control is used to control a torque motor. A torque motor is any motor which may operate in an energized but non-rotating mode primarily, to provide torsional force to the positioned load. | |
690 | SELF-SYNCHRONOUS TYPE OF MOTOR: |
This subclass is indented under the class definition. Subject matter in which a motor acts as a receiver or slave
device with respect to a master or transmitter device.
The receiver motor is termed "self-synchronous" in
that it has the ability to produce torque in direct response to
a command from the transmitter and to position itself in response
to the command. No additional feedback loop or servomotors
are included in these systems.
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691 | . With means to amplify transmitter signals: |
This subclass is indented under subclass 690. Subject matter which means are provided for receiving a
signal or control energy from the transmitter and delivering to
the receiver motor a signal or control energy, the magnitude
or energy content of which is appreciably greater than that received
from the transmitter.
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692 | . Having induction or "selsyn" type transmitter: |
This subclass is indented under subclass 690. Subject matter in which the transmitter is of the same or
similar structure as its self-synchronous receiver motor.
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693 | . Having impedance-type transmitter: |
This subclass is indented under subclass 690. Subject matter in which the transmitter comprises an impedance device which is effective to vary the characteristics of the voltage or current supplied to the receiver device. | |
694 | . Having commutated dynamoelectric machine transmitter: |
This subclass is indented under subclass 690. Subject matter in which the transmitter comprises a dynamo-electric machine in which the field producing means and the brushes are angularly adjustable relative to each other and the electrical circuits extending from the transmitter are connected at the transmitter end thereof to the commutator brushes. | |
695 | . Having commutating switch-type transmitter: |
This subclass is indented under subclass 690. Subject matter in which the transmitter comprises a multiple
contact switch with control circuits extending from the several
contacts and a distributing contactor relatively movable into and
out of contact with the said several contacts.
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696 | OPEN-LOOP STEPPING MOTOR CONTROL SYSTEMS: |
This subclass is indented under the class definition. Subject matter in which a rotary electric motor; of
the type in which the rotary element tends to assume a predetermined
angular position when the motor is continuously energized; indexes
in discrete angular increments of essentially uniform magnitude
as a function of pulse inputs derived from outside the motor.
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34 | PLURAL, DIVERSE OR DIVERSELY CONTROLLED ELECTRIC MOTORS: |
This subclass is indented under the class definition. Subject matter in which there are two or more electric motors
forming the ultimate load on the system of which one or more thereof are: (1)
Substantially structurally different than, or (2) Supplied
by substantially different sources of electrical supply than, or (3) Controlled
substantially differently than one or more others of the motors.
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35 | . Motors with diverse motions (e.g., reciprocating and rotary motors): |
This subclass is indented under subclass 34. Subject matter in which there are one or more motors having one kind of driving or output motion (e.g., rotary motion) and one or more other motors having another king of output or driving motion (e.g., linear motion) and wherein the motors are each adapted to drive or actuate a useful load device separately or in common. | |
37 | . Plural reciprocating or oscillating motors: |
This subclass is indented under subclass 34. Subject matter in which two or more of the diverse or diversely
controlled motors are reciprocating or oscillating motors.
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38 | . Plural linear-movement motors: |
This subclass is indented under subclass 34. Subject matter in which two or more of the diverse or diversely
controlled motors are linear-movement motors.
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39 | . Work and feed motors (e.g., indexing): |
This subclass is indented under subclass 34. Subject matter in which one or more electric motors, hereinafter
referred to as "work" motors, are arranged
to actuate means for producing relative motion between: (1) a
thing to be treated, traversed or operated on, hereinafter referred
to as the "work", and (2), a
tool, or traversing or operating mechanism, hereinafter referred
to as the "tool", the tool being adapted to
perform some work or operation on or with respect to the work, combined
with one or more other electric motors, hereinafter referred to
as the "feed" or "indexing" motors, arranged to
control; (3) the rate of feed of the "work" to the "tool" or
vice versa, or (4) the position of the "tool", spacially
or angularly, relative to the path of movement of the work
or the tool whichever is driven by the work motor.
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40 | . Motor biased against rotation: |
This subclass is indented under subclass 34. Subject matter in which means, other than an electric
motor, are provided for causing the rotary work-element
of one or more of the electric motors to tend to return to a previously occupied
position when moved therefrom as a result of energization of the
motor.
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41 | . Having electrical synchronizing interconnections: |
This subclass is indented under subclass 34. Subject matter in which means are provided for electrically
interconnecting the winding of an electric motor to the winding
of another electric motor, or for electrically interconnecting
a winding on an auxiliary dynamo-electric machine connected
to the rotor of an electric motor to the winding of an auxiliary
dynamo-electric machine connected to the rotor of another
electric motor; said interconnections being so arranged
that when the two electric motors operate at predetermined relative speeds
and/or phase relationships substantially no current flows
in said interconnections, but that when said relative speeds
or phase relationship depart from said relationships current flow
occurs in the interconnection in a direction which tends to restore
the said speed and/or phase relationships between the motors.
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42 | .. Between windings on auxiliary dynamo-electric machines: |
This subclass is indented under subclass 41. Subject matter in which an auxiliary dynamo-electric
machine is connected to the rotors of each of two or more electric
motors, and the synchronizing interconnections are connected between
the windings on the auxiliary dynamo-electric machines.
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43 | .. D.C. or A.C. commutator motors with slip rings: |
This subclass is indented under subclass 41. Subject matter in which each of the interconnected motors
is either a direct-current motor or an alternating current
motor having both a commutator and one or more slip rings, the synchronizing
interconnections being connected to the slip rings.
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44 | .. Between induction motor secondaries: |
This subclass is indented under subclass 41. Subject matter in which two or more of the motors are induction
motors, the interconnections being made between the secondaries (induced
windings).
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45 | . Mechanically coupled in fixed ratio of movement: |
This subclass is indented under subclass 34. Subject matter in which means are provided for coupling, mechanically, the
driving or output members of two or more motors in a fixed or predetermined
ratio of movement.
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46 | .. Motors having unlike operating characteristics: |
This subclass is indented under subclass 45. Subject matter in which one or more of the motors have electrical
or mechanical characteristics which are different than the corresponding
characteristic of one or more others of the motors.
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47 | ... Synchronous and nonsynchronous motors: |
This subclass is indented under subclass 46. Subject matter in which one or more of the motors is a synchronous
motor and one or more others of the motors is a non-synchronous motor.
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48 | .. Mechanically coupled in torque opposition: |
This subclass is indented under subclass 45. Subject matter in which one or more of the motors are connected
to a rotary member so as to exert a torque therein in one direction
and one or more others of the motors are connected to the same rotary
member so as to exert torque therein in the opposite direction (either
simultaneously or otherwise).
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49 | . Motors electrically connected in cascade or tandem: |
This subclass is indented under subclass 34. Subject matter in which there are one or more motors adapted
to be connected to one or more sources of electric energy to convert
part of the energy into mechanical energy and part into electrical
energy and in which there are one or more other motors combined
with means for supplying the last named motors with the converted
electrical energy.
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50 | .. With means for effecting other motor interconnections: |
This subclass is indented under subclass 49. Subject matter in which means are provided for connecting
the motors in electrical relationship with each other in other than
cascade or tandem relation.
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51 | . Plural, diverse motor controls for different motors: |
This subclass is indented under subclass 34. Subject matter in which means are provided for controlling
one or more motors to effect one operational control thereof and
for controlling one or more other motors to effect a different operational
control thereof.
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52 | . Slipping and/or racing control for electric motors: |
This subclass is indented under subclass 34. Subject matter in which means are provided for reducing
the speed of, or reducing the electrical power input to, one
or more electric motors when one or more of the electric motors
is slipping or racing while operating as a motor.
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53 | . Plural, diverse motor controls: |
This subclass is indented under subclass 34. Subject matter in which means are provided for effecting
two or more diverse operations of two or more motors.
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54 | .. Motor-reversing: |
This subclass is indented under subclass 53. Subject matter in which one of the control means is a means
for reversing the motors.
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55 | ... With running-speed control: |
This subclass is indented under subclass 54. Subject matter in which means are provided for also controlling
the running-speed of the motors.
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56 | .... And braking: |
This subclass is indented under subclass 55. Subject matter in which means are also provided for controlling
the motors by braking the same.
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57 | ... And braking: |
This subclass is indented under subclass 54. Subject matter in which means are also provided for controlling
the motors by braking.
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58 | ... And acceleration control: |
This subclass is indented under subclass 54. Subject matter in which means are provided for also controlling
the rate of the motors acceleration and or deceleration.
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59 | .. Running-speed control: |
This subclass is indented under subclass 53. Subject matter in which means are provided for controlling
the running speed of the motors in addition to one or more other
motor operations.
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60 | ... And braking: |
This subclass is indented under subclass 59. Subject matter in which means are also provided for braking
the motors.
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61 | ... And acceleration control: |
This subclass is indented under subclass 59. Subject matter in which means are provided for also controlling
the acceleration and/or deceleration of the motors.
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62 | ... And automatic starting and/or stopping and/or with time delay: |
This subclass is indented under subclass 59. Subject matter in which means are also provided for automatically
starting and/or stopping the motors in response to one
or more predetermined conditions and/or with means to effect
a predetermined time delay in one or more operational controls of
the motors.
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63 | .. Braking: |
This subclass is indented under subclass 53. Subject matter in which means are provided for braking the
motors in addition to one or more other operational controls of
the motors.
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64 | .. Acceleration control: |
This subclass is indented under subclass 53. Subject matter in which means are provided for controlling
the rate of acceleration and/or deceleration of the motors.
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65 | . Motor-reversing: |
This subclass is indented under subclass 34. Subject matter in which means are provided for causing two
or more electric motors to operate in one direction at one time
and in a reverse direction at another time.
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66 | . Running-speed control: |
This subclass is indented under subclass 34. Subject matter in which means are provided for controlling
the running speed of two or more electric motors.
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67 | .. Diverse speeds for different motors: |
This subclass is indented under subclass 66. Subject matter in which means are provided for running one
or more motors at one speed and one or more other motors at another
speed simultaneously.
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68 | .. Relative motor speed control: |
This subclass is indented under subclass 66. Subject matter in which means are provided for controlling
or regulating the speed of one or more electric motors relative
to the speed of one or more other electric motors.
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69 | ... With speed-difference detector: |
This subclass is indented under subclass 68. Subject matter in which means are provided for detecting
or sensing a difference in speed between two or more of the motors
and for initiating the operation of the means for controlling the
relative speeds of the motors.
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70 | .... Electrical-type detectors: |
This subclass is indented under subclass 69. Subject matter in which the speed difference detecting or
sensing means comprises an electrical device which, per
se, generates, converts or controls electrical
energy, or is activated thereby.
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71 | ..... Voltage and/or current difference detector: |
This subclass is indented under subclass 70. Subject matter in which each of two or more of the motors
is provided with means for generating electrical voltages and/or
currents or is provided with means for controlling a separate voltage
or current, the detecting or sensing means being operated
by the difference in magnitude between the two separately generated
or controlled voltages or currents.
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72 | ..... Dynamoelectric machine detector: |
This subclass is indented under subclass 70. Subject matter in which a dynamoelectric machine is provided
for sensing or detecting the difference in speed between two or
more motors.
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73 | ..... Synchronously operated impedance detectors: |
This subclass is indented under subclass 70. Subject matter in which the detector comprises an impedance device having one or more parts driven synchronously with one or more motors and one or more other parts of the impedance driven synchronously with one or more other motors; or one or more parts of an impedance is actuated synchronously with one or more motors and one or more parts of another impedance device is actuated synchronously with one or more other motors. | |
74 | ..... Synchronously actuated switch detectors: |
This subclass is indented under subclass 70. Subject matter in which the detector comprises one or more electric switches one or more parts of which switches are operated synchronously with one or more motors and one or more other parts of the switches are operated synchronously with one or more other motors. | |
75 | ...... Plural switches connected in series: |
This subclass is indented under subclass 74. Subject matter in which the detector comprises two or more electric switches connected electrically in series with each other. | |
76 | .... Differential-gearing detector: |
This subclass is indented under subclass 69. Subject matter in which the detector comprises a differential
gearing device in which an input element of the gearing is driven
by one or more motors another input element is driven by one or
more other motors so that the differential or output element of
the gearing operates in response to the relative speeds of the motors.
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77 | ... Controlling motor speed in response to speed of another motor: |
This subclass is indented under subclass 68. Subject matter in which means are provided for controlling
the speed of a motor in response to changes in speed of another
motor.
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78 | .... Controlling A.C. frequency or rate of electrical impulses to other motor: |
This subclass is indented under subclass 77. Subject matter in which means are provided for controlling
the speed of said other motor by controlling the frequency of alternating
current supplied to said motor or by controlling the rate at which
electrical impulses are supplied to said other motor.
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79 | ... Control of both armature (or primary) and field (or secondary) circuits: |
This subclass is indented under subclass 68. Subject matter in which means are provided for controlling
the armature (or primary) circuit of one or more
of the motors in combination with means for also controlling the
field (or secondary) circuit of one or more motors, simultaneously
or separately.
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80 | ... Armature or primary circuit control: |
This subclass is indented under subclass 68. Subject matter in which means are provided for controlling
the armature or primary circuit of one or more of the motors.
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81 | ... Field secondary circuit control: |
This subclass is indented under subclass 68. Subject matter in which means are provided for controlling
the field or secondary circuit of one or more of the motors.
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82 | .. Armature or primary circuit control: |
This subclass is indented under subclass 66. Subject matter in which means are provided for controlling
the armature or primary circuits of a plurality of motors to control
the (group) speed of the motors.
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83 | ... Series-parallel armature circuit connections: |
This subclass is indented under subclass 82. Subject matter in which means are provided for connecting
the armature conductors or windings of one or more motors in series
relationship with the armature conductors or windings of one or
more other motors at one time and in parallel relationship therewith
at another time; or for connecting the armature conductors
or windings of one or more motors in series with the armature conductors
or windings of one or more other motors and simultaneously connecting
the armature conductors or windings of one or more third motors
in parallel with the armature conductors or windings of one or more
other motors.
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84 | .. Field or secondary circuit control: |
This subclass is indented under subclass 66. Subject matter in which means are provided for controlling
the field circuit or the secondary circuit of two or more motors
for controlling the (group) speed of the motors.
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85 | . Synchronizing or phasing control: |
This subclass is indented under subclass 34. Subject matter in which means are provided for causing a
movable motive element of one or more electric motors to occupy
or assume a predetermined relative position or phase with respect
to a movable motive element of one or more other electric motors
either while stationary or while in motion.
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86 | . Braking: |
This subclass is indented under subclass 34. Subject matter in which means are provided for braking the
motors.
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87 | .. Motor used as braking generator (dynamic braking): |
This subclass is indented under subclass 86. Subject matter in which braking is effected by means which
cause one or more of the motors to operate as a generator thus retarding
the motor and load devices operated thereby.
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88 | ... Load or current division during braking: |
This subclass is indented under subclass 87. Subject matter in which means are provided for controlling
the magnitude of the current delivered by one or more of the motors
being braked relative to the magnitude of the current delivered
by one or more others of the motors being braked.
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89 | ... Motor as exciter for another motor: |
This subclass is indented under subclass 87. Subject matter in which means are provided for connecting the generating or armature circuit of one or more of the motors to the field or exciting circuit of one or more others of the motors during the braking period to supply the exciting or field current to said other motors. | |
90 | . Acceleration control: |
This subclass is indented under subclass 34. Subject matter in which means are provided for controlling
the acceleration and/or deceleration of two or more electric
motors.
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91 | .. Accelerating motors in succession or selectively: |
This subclass is indented under subclass 90. Subject matter in which means are provided for accelerating
and/or deceleration of one or more electric motors and
subsequently accelerating and/or decelerating one or more
other electric motors; or in which means are provided for accelerating
and/or decelerating two or more electric motors and with
which means one or more of the motors can be accelerated and/or decelerated
without accelerating one or more others of the motors.
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92 | .. Control of both armature (or primary) and field (or secondary) circuits: |
This subclass is indented under subclass 90. Subject matter in which means are provided for controlling
both the armature (or primary) circuits and the
field or (secondary) circuits of the motors.
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93 | ... Series-parallel connected armature or primary circuits: |
This subclass is indented under subclass 92. Subject matter in which means are provided for connecting
the armature or primary circuits of two or more electric motors
in series circuit relationship with respect to each other at one time
and in parallel circuit relationship with respect to each other
at another time; or for connecting two or more electric
motors in parallel circuit relationship with respect to each other
and simultaneously two or more motors in series circuit relationship
with respect to each other.
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94 | .. Armature or primary circuit control: |
This subclass is indented under subclass 90. Subject matter in which means are provided for controlling
the armature or primary circuits of the motors.
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95 | ... Series-parallel connections: |
This subclass is indented under subclass 94. Subject matter in which means are provided for connecting
the armature or primary circuits of two or more electric motors
in series circuit relationship with respect to each other at one time
and in parallel circuit relationship with respect to each other
at another time; or for connecting the armature or primary
circuits of two or more electric motors in series circuit relationship
with respect to one another and simultaneously connecting the armature
or primary circuits of two or more motors in parallel circuit relationship
with respect to one another.
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96 | .... With armature circuit impedance: |
This subclass is indented under subclass 95. Subject matter in which means are provided for providing
impedance in the armature or primary circuits of the motors.
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97 | .. Field or secondary circuit control: |
This subclass is indented under subclass 90. Subject matter in which means are provided for controlling
the field or secondary circuits of the electric motors.
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98 | . Load control: |
This subclass is indented under subclass 34. Subject matter in which means are provided for controlling
the magnitude of the load which is driven or actuated by the motors, or
for otherwise controlling the magnitude or amount of work done by
the motors; or for controlling the division of load or
current between the motors.
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99 | .. Fixed ratio of load or current division: |
This subclass is indented under subclass 98. Subject matter in which means are provided for controlling
the division of load current so that the ratio of division is or
can be maintained at some fixed or predetermined ratio.
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100 | ... By field or secondary circuit control: |
This subclass is indented under subclass 99. Subject matter in which means are provided for controlling
the field or secondary circuits of the electric motors.
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101 | . Starting and/or stopping: |
This subclass is indented under subclass 34. Subject matter in which means are provided for starting
and/or stopping one or more of a group of two or more electric
motors.
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102 | .. Sequential or successive starting and/or stopping: |
This subclass is indented under subclass 101. Subject matter in which means are provided for starting
or stopping two or more electric motors one after another.
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103 | .. Selective starting and/or stopping: |
This subclass is indented under subclass 101. Subject matter in which means are provided for starting
or stopping one or more electric motors without starting and/or
stopping one or more other electric motors.
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104 | .. Armature (or primary) circuit control: |
This subclass is indented under subclass 101. Subject matter in which means are provided in the armature (or
primary) circuit for starting and/or stopping
the motors.
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105 | . Plural, diverse or diversely controlled sources of armature (or primary) supply: |
This subclass is indented under subclass 34. Subject matter in which two or more sources of electrical
supply are provided to supply energy to the armature or primary
circuits of the motors, one or more of which sources of
supply are different in kind, type, degree or
magnitude or are differently controlled, with respect to
one or more others of the sources.
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106 | .. Diverse sources: |
This subclass is indented under subclass 105. Subject matter in which one or more of the sources are substantially
different in respect to (1) structure of the sources
or (2) the nature or magnitude of an electrical
characteristic of the sources, than one or more others
of the sources.
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107 | ... A.C. and D.C.: |
This subclass is indented under subclass 106. Subject matter in which the sources comprise one or more
AC sources and one or more DC sources.
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108 | .... Different voltages: |
This subclass is indented under subclass 107. Subject matter in which one or more of the sources of supply, supply
electric energy at one voltage magnitude and one or more others
of the sources supply energy at another magnitude of voltage.
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109 | ... Different voltages: |
This subclass is indented under subclass 106. Subject matter in which one or more of the sources differs
in magnitude from one or more others of the sources.
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110 | ... Different frequencies: |
This subclass is indented under subclass 106. Subject matter in which one or more of the sources have
a different frequency than one or more others of the sources.
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111 | . Series-parallel connected motors: |
This subclass is indented under subclass 34. Subject matter in which means are provided for connecting
the armature or primary windings of one or more electric motors
in series circuit relationship with the armature or primary windings
of one or more other electric motors at one time and in parallel
circuit relationship at another time; or for connecting
the armature or primary windings of one or more electric motors
in series circuit relationship with the armature or primary windings
of one or more other electric motors, and simultaneously
connecting the armature or primary circuit of one or more electric
motors in parallel circuit relationship with the armature of primary
circuit of one or more other electric motors.
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112 | . Parallel connected motors: |
This subclass is indented under subclass 34. Subject matter in which means are provided for connecting
the armature or primary circuits of one or more electric motors
in parallel circuit relationship with the armature or primary circuits
of one or more other electric motors.
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113 | . Series connected motors: |
This subclass is indented under subclass 34. Subject matter in which means are provided for connecting
the armature or primary circuits of one or more electric motors
in series circuit relationship with the armature or primary circuits
of one or more other electric motors.
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114 | IMPACT, MECHANICAL SHOCK, OR VIBRATION-PRODUCING MOTORS: |
This subclass is indented under the class definition. Subject matter in which (1) means are provided
for actuating one or more parts of an electric motor relative to
and into impact or percussive contact with one or more other parts which
are either parts of the motor structure or are structurally combined
with the motor (i.e., not merely
other parts which constitute a device or work piece to be operated
on by the motor and to which the motor may be attached or relatively
positioned temporarily); or (2) the motor
is a shock or vibration producing type of motor the prime or essential
function of which motor is to transmit mechanical shock or vibrations
to a mechanism or device upon which the motor may be supported or
to which the motor may be clamped or otherwise secured.
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115 | MOTOR WITH DIVERSE MOTIONS (E.G., ROTARY AND RECIPROCATING): |
This subclass is indented under the class definition. Subject matter in which means are provided for giving the
working or output member of the motor two or more types of motion either
simultaneously or not.
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116 | NONMAGNETIC MOTOR: |
This subclass is indented under the class definition. Subject matter which the electric motor converts electric
to mechanical energy by means other than magnetic induction.
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117 | . Thermoelectric motor: |
This subclass is indented under subclass 116. Subject matter in which the motor comprises a member which
undergoes substantial changes in shape, position and/or
dimensions when heated, and means for electrical heating, the member.
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118 | MAGNETOSTRICTIVE MOTOR: |
This subclass is indented under the class definition. Subject matter in which the motor is of the magneto-striction
type.
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119 | RECIPROCATING OR OSCILLATING MOTOR: |
This subclass is indented under the class definition. Subject matter in which the motor is a reciprocating or
oscillating type of electric motor.
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120 | . Stopping after predetermined number of reciprocations or cycles (including single cycle): |
This subclass is indented under subclass 119. Subject matter in which means are provided for stopping
the motor after it has made a predetermined number of reciprocations
or cycles.
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121 | . Having means to produce a progressing or traveling motor field flux: |
This subclass is indented under subclass 119. Subject matter in which means are provided for producing
a magnetic field of force in the motor, which field (or
the resultant of the component elements thereof) is caused
to occupy a succession of positions in the path or direction of
travel of the reciprocable member of the motor.
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122 | . Plural, diverse or diversely controlled motor windings: |
This subclass is indented under subclass 119. Subject matter in which the motor is provided with two or
more energizing windings one or more of which are different structurally, or energized
or controlled differently than one or more others of the windings.
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123 | .. Polyphase or diverse or diversely controlled sources of motor supply: |
This subclass is indented under subclass 122. Subject matter in which there is either a polyphase alternating
current supply, or two or more sources of supply, one
or more of which are different or differently controlled than one or
more others of the sources, connected to supply energy
to the two or more of the motor windings.
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124 | ... A.C. and D.C. sources: |
This subclass is indented under subclass 123. Subject matter in which at least one of the sources is a
unidirectional current source (including pulsating DC current) and
at least one other of the sources is an alternating (i.e., reversing
polarity) current source.
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125 | .. Unidirectionally conductive devices in energizing circuit: |
This subclass is indented under subclass 122. Subject matter in which one or more unidirectionally conductive
devices are connected in the energizing circuit of one or more of
the windings.
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126 | . Energizing winding circuit control: |
This subclass is indented under subclass 119. Subject matter in which means are provided for controlling
the electric circuit which supplies the electric energy to the energizing
winding of the motor.
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127 | .. Automatic in response to predetermined position, movement or condition in or of the motor or driven device: |
This subclass is indented under subclass 126. Subject matter wherein automatic means are provided so that
the energizing winding is controlled in response to the position, movement, limit
of travel, amplitude or rate of change of movement of the
motor or the device actuated thereby; or in response to
the noise, sound or mechanical vibrations produced by the
motor parts or by the motor actuated device; magnitude
of energizing current or occurrences of pulses in the energizing
circuit.
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128 | ... Noise, sound, vibration, movement or position of motor: |
This subclass is indented under subclass 127. Subject matter in which the sensing means responds to noise, sound, or
mechanical vibrations of or emanating from the motor being controlled
or the device actuated by the motor, or responds to the
amplitude or magnitude or the rate of movement of, or the
limit-of-travel or other position of the motor
being controlled or the device actuated by the motor.
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129 | .. By means for producing periodic electrical pulses in the energizing circuit: |
This subclass is indented under subclass 126. Subject matter in which means are provided for producing
a succession of electrical pulses in the energizing circuit of the
winding, the periodicity of the pulses being such that
the motor to which the pulses are supplied is maintained in substantially
continuous motion by the succession of pulses.
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130 | ... Electrical oscillation or condenser charging and/or discharging circuits: |
This subclass is indented under subclass 129. Subject matter in which the means for producing the periodic
pulses comprise either an electrical self-oscillating circuit
or a condenser changing and/or discharging circuit.
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131 | ... Motor or escapement-controlled means: |
This subclass is indented under subclass 129. Subject matter in which the means for producing the periodic
pulses includes a device of means which is actuated or controlled
by a motor, or escapement device to control the periodicity
of the pulses.
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132 | .. By space-discharge or unidirectionally conductive devices in energizing circuit: |
This subclass is indented under subclass 126. Subject matter in which the means for controlling the energizing
circuit of the motor includes a space-discharge device
or an unidirectionally-conductive device connected in series
with or in shunt to the energizing winding of the motor.
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133 | .. By impedance devices in energizing circuit: |
This subclass is indented under subclass 126. Subject matter in which the control means comprises one
or more impedance devices in series and/or in shunt to
the motor windings.
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134 | .. By circuit making and/or braking devices: |
This subclass is indented under subclass 126. Subject matter in which the control means comprise circuit
making and/or breaking devices in series with the energizing
circuit of the motor.
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135 | LINEAR-MOVEMENT MOTORS: |
This subclass is indented under the class definition. Subject matter in which the motor is linear movement type
of electric motor.
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136 | AUXILIARY MEANS FOR PRODUCING MECHANICAL STARTING OR ACCELERATING TORQUE: |
This subclass is indented under the class definition. Subject matter in which means, other than the motor
being controlled and its electrical circuits, are provided
for producing a mechanical turning effort to the rotor element of
the motor during the starting and/or the accelerating period
of operation of the motor, and which means is deenergized, disconnected, or
otherwise incapacitated to assist in actuating the motor under running-speed
conditions.
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137 | . By auxiliary motor: |
This subclass is indented under subclass 136. Subject matter in which the auxiliary means comprises a
motor.
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139 | BATTERY-FED MOTOR SYSTEMS: |
This subclass is indented under the class definition. Subject matter in which the armature or primary circuit
of an electric motor is supplied by electric energy from one or
more primary or secondary electric batteries which constitute the
only source of supply for the motor.
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140 | GENERATOR-FED MOTOR SYSTEMS HAVING GENERATOR CONTROL: |
This subclass is indented under the class definition. Subject matter in which an electric generator is provided
for supplying electric energy to the armature or primary circuit
of an electric motor and in which means are also provided for controlling
the generator to thereby control the operation of the electric motor.
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141 | . Automatic generator control and/or with time-delay means: |
This subclass is indented under subclass 140. Subject matter in which means are provided for automatically
controlling the generator in response to a predetermined condition, or
in which time-delay means are provided for retarding or
delaying the operation of the generator control means, whether
initiated manually or otherwise.
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142 | .. Responsive to diverse conditions or with time-delay means: |
This subclass is indented under subclass 141. Subject matter in which means are provided for automatically
controlling the generator in response to two or more diverse conditions, or for
automatically controlling the generator in response to one condition
and with means for introducing a time-delay in the operation
of the generator control.
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143 | ... Plural electrical conditions: |
This subclass is indented under subclass 142. Subject matter in which two or more of the conditions comprise
electrical conditions.
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144 | .. Armature or primary current of motor: |
This subclass is indented under subclass 141. Subject matter in which means are provided for controlling
the generator in response to the magnitude or rate of change of
magnitude of the current in the armature or primary circuit of the
motor.
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145 | .. Terminal voltage or counter e.m.f. of motor: |
This subclass is indented under subclass 141. Subject matter in which means are provided for controlling
the generator in response to the magnitude or the rate of change
of magnitude of the terminal voltage or the counter electromotive
force of the motor.
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146 | .. Speed of motor or driven device: |
This subclass is indented under subclass 141. Subject matter in which means are provided for controlling
the generator in response to the speed of the motor or a device
driven thereby.
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147 | .. Speed or frequency of generator or its drive means: |
This subclass is indented under subclass 141. Subject matter in which means are provided for controlling
the generator in response to the speed of the generator or the frequency
of the voltage or current generated thereby, or in response
to the speed of the generator driving means.
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148 | . Alternating-current-motor system: |
This subclass is indented under subclass 140. Subject matter in which the motor is an alternating current
motor (i.e., a motor which operates
when the armature or primary circuit is supplied with alternating
current) and in which the generator supplies an alternating
current to the armature or primary circuit of the motor.
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149 | . With plural, diverse or diversely controlled generators: |
This subclass is indented under subclass 140. Subject matter in which there are two or more generators
which supply the armature or primary circuits of the electric motor, in
which one or more of the generators are structurally different or
are controlled differently (e.g., with respect
to time, degree or magnitude, etc.) than one
or more others of the generators, and in which means are
provided for controlling a plurality of generators.
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150 | . With flywheel on generator or on motor: |
This subclass is indented under subclass 140. Subject matter in which a flywheel or other massive body
is mounted for rotation with the rotor of either the generator or
the motor.
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151 | . Control of both the generator and the circuit to the motor: |
This subclass is indented under subclass 140. Subject matter in which means are provided for controlling
the electric circuit which extends from the generator armature to
the motor armature and additional means are provided for controlling
the generator.
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152 | .. With motor control: |
This subclass is indented under subclass 151. Subject matter in which means are also provided for controlling
the motor, which means is in addition to the control of
the supply circuit extending to the primary circuit of the motor and
the control of the generator.
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153 | . Control of both the generator and the motor: |
This subclass is indented under subclass 140. Subject matter in which means are provided for controlling
the generator and additional means are provided for controlling
the motor.
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154 | .. Control of excitation (field) circuit of both: |
This subclass is indented under subclass 153. Subject matter in which the control means effect control
of the field or secondary circuit of both the generator and of the
motor.
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156 | . Plural, diverse or diversely actuated, generator control means: |
This subclass is indented under subclass 140. Subject matter in which two or more distinct means are provided
for controlling the generator, one or more of which control
means are different structurally or are controlled differently (e.g., at
different times, different degree or magnitude of control, etc.) than
one or more others of the control means.
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157 | . Generator speed control: |
This subclass is indented under subclass 140. Subject matter in which means are provided for controlling
the speed of the generator by controlling the driving means therefor.
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158 | . Generator field circuit control: |
This subclass is indented under subclass 140. Subject matter in which means are provided for controlling
the field circuit of the generator.
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159 | HAVING ROTOR ELEMENT BIASED AGAINST ROTATION: |
This subclass is indented under the class definition. Subject matter in which the motor comprises a rotatable
power output element (rotor) combined with means
for exerting a torque in opposition to and simultaneously with the motor
torque.
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160 | . By resilient biasing means (e.g., spring): |
This subclass is indented under subclass 159. Subject matter in which the biassing means comprises a spring
or other means which when flexed or distorted inherently tends to
reassure its previous shape or dimension.
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161 | WITH FLYWHEEL OR MASSIVE ROTARY MEMBER: |
This subclass is indented under the class definition. Subject matter in which a flywheel or other massive rotatable
mounted body is mounted in driving relationship with the motor rotor
or other working member in such manner that energy transfer can
take place from the motor to the flywheel or other massive rotary member
and vice versa.
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162 | CONTROL BY PATTERNS OR OTHER PREDETERMINED SCHEDULE MEANS: |
This subclass is indented under the class definition. Subject matter in which means are provided for controlling
the operation of an electric motor in accordance with a predetermined schedule, said
means comprising patterns, templates, perforated
sheets, or other shaped or treated control devices having
a configuration or design varying in accordance with a predetermined
schedule of control to which it is desired to subject the motor.
The systems included herein are "open-loop" controls
and thus are not servomechanisms.
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163 | . Motor running-speed control: |
This subclass is indented under subclass 162. Subject matter in which means are provided for automatically
varying the running speed of a motor in accordance with a predetermined schedule
means.
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164 | .. Cyclically varying or repeated speed schedules: |
This subclass is indented under subclass 163. Subject matter in which means are provided for repeating a predetermined speed schedule as a result of which the same speed-control cycle is traversed two or more times. | |
700 | SYNCHRONOUS MOTOR SYSTEMS: |
This subclass is indented under the class definition. Subject matter wherein the system of supply and/or
control is for a synchronous motor.
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400.01 | . Brushless motor closed-loop control: |
This subclass is indented under subclass 700. Subject matter for controlling the currents or voltages
in (or supplied to) the motor phases (or
windings) to control motor performance (or produce
torque) without motor-controlled mechanical switches (i.e., commutators, brushes, slip
rings, etc.) by generating a feedback
signal in response to any motor parameter (e.g., speed, position, load, torque, current, voltage, acceleration, etc.) and
controlling the motor in response to the feedback signal.
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400.02 | .. Vector control (e.g., dq-axis control, 3-2 phase conversion, etc.): |
This subclass is indented under subclass 400.01. Subject matter in which the feedback loop includes a means
to convert multiphase currents or voltages supplied to the motor phases (or
windings) to a two-phase representation of a related
motor parameter (e.g., flux, rotor
angle current vector, etc.) which is
used to control the motor.
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400.03 | .. Plural reference comparison (e.g., reference changes during startup, upper/lower reference, etc.): |
This subclass is indented under subclass 400.01. Subject matter in which the feedback signal is compared against more than one reference value. | |
400.04 | .. Specific processing of feedback signal or circuit therefore (i.e., A-D conversion, compression, or modification): |
This subclass is indented under subclass 400.01. Subject matter in which the feedback signal is altered, modified, or
converted.
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400.05 | ... With reference signal generation (e.g., from external system, mechanical oscillator, etc.): |
This subclass is indented under subclass 400.04. Subject matter comprising a circuit or method for obtaining
or generating a parameter or value (i.e., the
reference signal) by which a feedback signal can be compared.
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400.06 | ... Comparator circuit or method: |
This subclass is indented under subclass 400.04. Subject matter comprising a circuit or technique by which
to compare the motor feedback signal with a reference or value.
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400.07 | ... Plural diverse feedback (e.g., torque and speed, load and speed, etc.): |
This subclass is indented under subclass 400.04. Subject matter wherein two or more motor conditions or parameters
are detected and used as feedback signals.
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400.08 | ... With nonmotor parameter or remote condition detected (e.g., temperature, light, airflow, position of diverse object, etc.): |
This subclass is indented under subclass 400.04. Subject matter in which the control signal is a function
of a condition spatially separate from the motor structure.
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400.09 | .. Plural mode control (e.g., open and closed loop, starting and braking, plural-phase and single-phase operation, open and closed loop, etc.): |
This subclass is indented under subclass 400.01. Subject matter in which the motor is controlled in more
than one distinct set or range of operational characteristics (e.g., high/low
speed, forward/reverse, running/braking, high/low
torque, etc.).
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400.1 | ... With timing or delay: |
This subclass is indented under subclass 400.09. Subject matter in which a second mode of operation is initiated
after a specified period of time.
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400.11 | ... With separate starting mode or "ramp-up" mode (e.g., open-loop control for startup, startup initialization, etc.): |
This subclass is indented under subclass 400.09. Subject matter wherein the motor is controlled with one
distinct set or range of operational characteristics prior to reaching running
speed and a second set or range of operational characteristics at
running speed.
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400.12 | ... With table lookup, stored map, or memory table (e.g., speed table, stored current profile, etc.): |
This subclass is indented under subclass 400.09. Subject matter wherein the control information for each
of the plural modes is predetermined and stored in a table, map, or
memory.
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400.13 | .. With timing, delay, or clock pulse counting circuit or generation: |
This subclass is indented under subclass 400.01. Subject matter wherein a means by which a temporal assessment
is used within the feedback system to provide control.
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400.14 | ... Phase shifted as function of speed or position: |
This subclass is indented under subclass 400.13. Subject matter wherein the currents or voltages to the motor
phases or windings are advanced and/or made to lag in accordance with
detected speed and/or position.
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400.15 | .. With torque or load determination (e.g., by calculation, detection, or estimation, etc.): |
This subclass is indented under subclass 400.01. Subject matter wherein the rotational force of the motor or resistance to rotation is determined by calculation, estimation, or detection. | |
400.16 | .. Control or position information digitally stored on disk (e.g., computer hard drive position detection, etc.): |
This subclass is indented under subclass 400.01. Subject matter wherein information concerning the position
or control of the motor is digitally stored on a computer disk (e.g., a hard
drive).
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400.17 | .. Modification or waveshaping of switching control signal (e.g., switching control input to inverter, etc.): |
This subclass is indented under subclass 400.01. Subject matter in which switching control signals used to
control motor performance (or produce torque) are
processed, modified, manipulated, or
generated.
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400.18 | .. With manual control (e.g., foot switch, surgical tool, etc.): |
This subclass is indented under subclass 400.01. Subject matter wherein a human operator provides motor control
via an interface.
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400.19 | .. Slew rate control (e.g., slew limiting, etc.): |
This subclass is indented under subclass 400.01. Subject matter wherein the time rate of change (or
gradient) of voltage or current in either the phase windings
or in a circuit for controlling the voltages or currents is varied
or regulated.
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400.2 | .. Phase voltage wave-shaping circuit or method (e.g., output from inverter, phase energizing signal, trapezoidal wave, etc.): |
This subclass is indented under subclass 400.01. Subject matter in which the energy supplied to the motor
field windings is modified and/or altered to achieve a
desired result (e.g., wave shaping
the drive pulses).
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400.21 | .. Having protection means (e.g., switching circuit protection, stall protection, failure to start, "wrong" direction, etc.): |
This subclass is indented under subclass 400.01. Subject matter in which any part of the motor, switches, feedback
system, and/or commutation control hardware is
protected against adverse effects.
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400.22 | ... Current or voltage limiting (e.g., over-voltage or over-current protection, etc.): |
This subclass is indented under subclass 400.21. Subject matter in which current and/or voltage
is limited, reduced, or compensated to prevent
failure or malfunction.
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400.23 | .. Torque ripple stabilization or acoustic noise attenuation (e.g., cogging prevention, etc.): |
This subclass is indented under subclass 400.01. Subject matter in which the sound or mechanical vibration
of the motor is attenuated or eliminated (or otherwise
modified) and/or the motor torque is stabilized
and variations are reduced.
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400.24 | .. Electrical noise attenuation (e.g., EMI, EMR, RFI, etc.): |
This subclass is indented under subclass 400.01. Subject matter for reducing or eliminating electromagnetic
radiation or electrical disturbances (e.g., transients
or perturbations) which interfere with desired operation (e.g., feedback
signal) of the motor.
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400.25 | ... Switching noise transient attenuation (e.g., switching error prevention, masking, blanking, etc.): |
This subclass is indented under subclass 400.24. Subject matter in which the electrical disturbances or transients
that result from transistor (i.e., in
the inverter) switching during motor control are reduced
or eliminated.
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400.26 | .. Switching circuit structure or component (e.g., inverter, bridge circuit, etc.): |
This subclass is indented under subclass 400.01. Subject matter directed to circuits to make or break (i.e., switches) the
electrical power to the windings.
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400.27 | ... Having both high-side and low-side switching elements for plural-phase motor: |
This subclass is indented under subclass 400.26. Subject matter having a means to connect and disconnect
a motor winding to a power supply (i.e., the
high-side switching elements) and to connect and
disconnect a motor winding to ground (i.e., the
low-side switching elements).
Figure 1. T1a, T2a, and T3aare high-side switching elements;T1b, T2b, and T3b are low-side switching elements; and A, B, andC indicate connections to the motor windings SEE OR SEARCH CLASS:
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400.28 | .... Diverse high side or low side switching: |
This subclass is indented under subclass 400.27. Subject matter wherein the means to connect and disconnect
a motor winding to a power supply (i.e., the
high-side switching elements) and the means to
connect and disconnect a motor winding to ground (i.e., the
low-side switching elements) are controlled in
a different manner or by a different method.
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400.29 | ... H-bridge type: |
This subclass is indented under subclass 400.26. Subject matter in which the motor is connected between two
switches for connecting the motor to a voltage supply (high-side switching
elements) and two switches for connecting the motor to
ground (low-side switching elements).
Figure 1. S1 and S3 are high-side switchingelements; andS2 are S4 are low-side switching elements. | |
400.3 | .. Power supply voltage feature (e.g., power supply voltage, Vcc compensation, rectifier circuit, power regulator, auxiliary or secondary power supply, etc.): |
This subclass is indented under subclass 400.01. Subject matter pertaining to the supply of voltage or current
to a circuit for controlling the motor.
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400.31 | .. Utilization or dissipation of stored or collapsing field energy (e.g., freewheeling, discharging one winding through another, etc.): |
This subclass is indented under subclass 400.01. Subject matter wherein energy stored in a motor winding is controlled, modified, dissipated, or used. | |
400.32 | .. Sensorless feedback circuit: |
This subclass is indented under subclass 400.01. Subject matter in which motor parameters (e.g., rotor
position, speed, etc.) are determined
by measuring phase current or voltage.
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400.33 | ... Voltage injection detection (e.g., voltage injected at startup to determine position, etc.): |
This subclass is indented under subclass 400.32. Subject matter wherein a usually small or test voltage (typically
not large enough to generate torque) is applied to (i.e., "injected") the
motor winding to determine position.
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400.34 | ... Electromotive force sensor (e.g., back or counter EMF sensor, etc.): |
This subclass is indented under subclass 400.32. Subject matter in which phase EMF is detected to determine
a motor attribute (e.g., rotor
position and/or speed) which is fed back to provide
commutation control data.
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400.35 | .... With zero-crossing detection (e.g., polarity reversal, etc.): |
This subclass is indented under subclass 400.34. Subject matter in which a polarity reversal (i.e., a change in sign) in an induced voltage or current in an undriven winding/coil is determined or sensed. | |
400.36 | ... With center-tap feedback circuit: |
This subclass is indented under subclass 400.32. Subject matter in which motor field windings are electrically connected to a common point and electrical parameters (i.e., current and/or voltage) are determined from the common point. | |
400.37 | .. With sensor structure (e.g., tachometer, reed switch, cam-controlled switching, etc.): |
This subclass is indented under subclass 400.01. Subject matter in which any motor parameter (e.g., speed, position, etc.) is
generated into a feedback signal.
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400.38 | ... Magnetic field sensor or responsive device (e.g., Hall element, magneto-resistance, etc.): |
This subclass is indented under subclass 400.37. Subject matter in which a magnetic field is used to determine
a motor parameter (e.g., position, speed, etc.).
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400.39 | .... Rotating sensor component separate from motor structure (e.g., resolver, magnetically sensed rotating disk, etc.): |
This subclass is indented under subclass 400.38. Subject matter wherein the magnetic field is generated remotely (i.e., separately) from
the motor structure (e.g., detected
from a rotating disk attached to a shaft turned by the motor rotor).
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400.4 | ... Optical sensor (e.g., encoder, photodetector, etc.): |
This subclass is indented under subclass 400.37. Subject matter wherein light or radiant energy is used to
determine the motor parameter (e.g., position
or speed, etc.).
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400.41 | .. Having specific motor structure (e.g., bifilar windings, airgap dimension, auxiliary winding, phase winding with midtap, etc.): |
This subclass is indented under subclass 400.01. Subject matter wherein the motor being controlled has a
structural characteristic or feature (e.g., an
element or dimension, etc.) that enhances, modifies, or
otherwise affects motor performance.
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400.42 | . Brushless motor open-loop control: |
This subclass is indented under subclass 700. Subject matter for controlling the currents or voltages
in (or to) the motor phases (or windings) to
control motor performance (or produce torque) without
motor-controlled mechanical switches (i.e., commutators, brushes, slip
rings, etc.) and without feedback of
any motor parameter.
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701 | . Hysteresis or reluctance motor systems: |
This subclass is indented under subclass 700. Subject matter wherein the motor includes a motor winding
energized with alternating current by the system of supply and/or
control to form a rotating magnetic field and (a) a
rotor member of high magnetic retentivity which acquires a fixed
magnetic field by induction from the energized winding and is thus attracted
to the rotating field to rotate at the speed of the rotating field
or (b) a rotor member which assumes a position
of minimum magnetic reluctance with respect to the rotating magnetic
field and, as a result of the magnetic field"s rotation, rotates
at the speed of the rotating magnetic field.
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702 | . Antihunting or damping: |
This subclass is indented under subclass 700. Subject matter which includes means to reduce or eliminate
variations in the speed of the energized synchronous motor from
the synchronous speed.
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703 | . Braking: |
This subclass is indented under subclass 700. Subject matter which includes means to slow down or stop
the rotation of the energized synchronous motor.
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704 | . Pole changing motor winding circuits: |
This subclass is indented under subclass 700. Subject matter which includes an alternating current motor
winding connected to an electric circuit, or a field winding
connected to an electric circuit, or both an alternating
current winding and a field winding each connected to an electric
circuit wherein the electric circuit in each instance includes switching
means to change the number of magnetic poles of the motor winding
or windings.
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705 | . Synchronization systems: |
This subclass is indented under subclass 700. Subject matter wherein the motor includes an alternating
current winding and a field winding and the system includes an alternating
current circuit connected to the alternating current winding of
the motor to generate a rotating electromagnetic field, means
to rotate the motor near synchronous speed and a circuit connected
to the field winding of the motor to form a direct current magnetic
field when the motor is rotating at near-synchronous speed
so that the direct current field being attracted to the rotating
magnetic field of the motor will rotate the motor at the speed of
the rotating field.
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706 | .. With armature power removal upon failure to synchronize or loss of synchronism: |
This subclass is indented under subclass 705. Subject matter wherein the system includes an alternating
current circuit having a switching means to apply ac power to the
AC winding of the motor and means responsive to some condition of
the energized motor related to the operation of the motor at subsynchronous
speed to control the switching means to de-energize the ac
winding of the motor upon failure of the motor to achieve or maintain
rotation at the speed of the rotating magnetic field.
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707 | ... Upon failure to resynchronize: |
This subclass is indented under subclass 706. Subject matter which includes a second switching means in
the circuit connected to the field winding, the means responsive
to a condition of the energized motor detecting the failure of the
motor to synchronize and controlling the second switching means
to remove the DC power from the field and to reapply power to the
field a predetermined number of times and controlling the first
switching means to remove power from the AC winding of the motor
if the motor still does not synchronize.
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708 | ... Responsive to thermal electrical element in system: |
This subclass is indented under subclass 706. Subject matter wherein the means responsive to some condition
includes a heat sensitive electrical element to control the switching means.
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709 | .. Having different armature voltage prior to synchronism: |
This subclass is indented under subclass 705. Subject matter wherein the alternating current winding circuit
includes electrical means to apply one alternating voltage to the
alternating currore synchronous operation and another value of voltage
to the motor for synchronous motor operation.
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710 | .. With D.C. field removal: |
This subclass is indented under subclass 705. Subject matter which includes means responsive to the loss
of synchronism in the motor to control the circuit connected to
the field winding of the motor to cut the DC power to the field
winding of the motor.
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711 | ... With electronic control element in system: |
This subclass is indented under subclass 710. Subject matter wherein the means to control the circuit
includes an electronic element to regulate the removal of DC power
from the DC field winding.
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712 | .. With field excitation application: |
This subclass is indented under subclass 705. Subject matter wherein the circuit connected to the field
winding includes switching means to connect a direct current source
of power to the field winding of the motor.
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713 | ... Responsive to slip voltage frequency in DC field winding: |
This subclass is indented under subclass 712. Subject matter wherein the rotating magnetic field and the
speed of the rotating motor induce an AC voltage in the field winding
and which includes means responsive to the frequency of the induced
voltage to control the switching means to apply the direct current
power to the field winding.
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714 | ... Responsive to armature current: |
This subclass is indented under subclass 712. Subject matter having means sensing the current in the alternating
current circuit to control the switching means to connect a source
of direct current to the direct current winding of the motor.
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715 | ... Responsive to rotor speed or rotor driven member: |
This subclass is indented under subclass 712. Subject matter wherein the switching means is actuated by
means responsive to the angular velocity of the rotor or to movement
of a member driven by the rotor.
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716 | . Field winding circuits: |
This subclass is indented under subclass 700. Subject matter which includes a field winding of a synchronous
motor and an electric circuit connected to the winding.
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717 | .. Responsive to a motor condition: |
This subclass is indented under subclass 716. Subject matter wherein the field winding circuit is controlled
by some condition of the motor.
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718 | ... Induced voltage in field winding: |
This subclass is indented under subclass 717. Subject matter wherein a rotating magnetic field from an
alternating current winding and rotating rotor induce a voltage
in the field winding includes a switching circuit under the control
of the induced voltage to control direct current to the field winding.
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719 | ... Speed responsive field power sources: |
This subclass is indented under subclass 717. Subject matter wherein the electric circuit connected to
the field winding includes direct current power sources whose power
is dependent upon the speed of the synchronous motor rotor.
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720 | . Armature winding circuits: |
This subclass is indented under subclass 700. Subject matter which includes an alternating current winding
of the motor.
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721 | .. Responsive to rotor shape position or speed: |
This subclass is indented under subclass 720. Subject matter wherein the electric circuit includes means
to regulate the energization of the alternating current winding
of the motor under the control of the rotor rotation.
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722 | .. Having electronic power conversion circuit: |
This subclass is indented under subclass 720. Subject matter wherein the electric circuit includes a static
type of power converter which generates an electric wave-form
which can be used by the alternating current winding of the motor.
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723 | .. Having variable frequency supply: |
This subclass is indented under subclass 720. Subject matter wherein the electric circuit has means to
vary the rate of cyclic variations of the electrical energy supplied
to the alternating current winding of the motor.
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724 | .. Having a plurality of windings or winding portions: |
This subclass is indented under subclass 720. Subject matter wherein the alternating current winding of
the motor consists of more than one winding or wherein such winding
is formed of sections which are connected together.
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725 | REPULSION MOTOR SYSTEMS: |
This subclass is indented under the class definition. Subject matter where the system of supply and/or
control is connected to a repulsion motor.
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726 | . With added motor winding or convertible to series motor: |
This subclass is indented under subclass 725. Subject matter wherein (a) the motor includes more
than one winding forming the inducing electromagnetic field, (b) the
motor armature has an added winding in addition to the commutated
induced winding, or (c) the system has circuitry
to place the field or inducing winding in series with the commutated
winding of the motor.
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727 | INDUCTION MOTOR SYSTEMS: |
This subclass is indented under the class definition. Subject matter wherein the system of supply and/or
control is for an induction motor.
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728 | . Repulsion start: |
This subclass is indented under subclass 727. Subject matter having a switching means in the secondary
circuit of the motor arranged so that, when starting, the
current induced in the secondary member creates an electromagnetic field
which reacts with the electromagnetic field formed by the primary
member to cause the motor to accelerate and having means to run
the motor as an induction motor after starting.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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729 | . Power-factor control: |
This subclass is indented under subclass 727. Subject matter wherein the system includes means connected
to the primary member, the secondary member, or
to both to change the electrical angle between the voltage and the current
in one or both of the members.
SEE OR SEARCH THIS CLASS, SUBCLASS:
| |||||||||||||
730 | . With plural separately movable rotors: |
This subclass is indented under subclass 727. Subject matter wherein the induction motor includes two
rotors rotatable with respect to each other.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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731 | . With voltage source connected to motor secondary: |
This subclass is indented under subclass 727. Subject matter wherein the secondary member is connected
to a system which supplies it with a voltage in addition to the
voltage electromagnetically induced by the primary member.
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732 | .. Electronic device controls current in secondary circuit: |
This subclass is indented under subclass 731. Subject matter wherein the system includes a three terminal
electronic device having two terminals connected in circuit with
the motor secondary and having the third terminal control the passage
of current between the other two terminals to or from the secondary
member of the motor.
SEE OR SEARCH CLASS:
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733 | .. Commutator connected to secondary winding: |
This subclass is indented under subclass 731. Subject matter wherein the secondary member is energized
through a rotary switch at least one contact of which is stationary
with respect to the secondary member and another contact of which
rotates relative thereto with another part of the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
| |||
734 | .. Slip rings connected to secondary winding: |
This subclass is indented under subclass 731. Subject matter wherein the secondary member is energized
continuously through at least two sliding contacts at least one
of which is stationary with respect to the secondary winding.
| |||
735 | ... Rotor shaft coupled to dynamoelectric machine: |
This subclass is indented under subclass 734. Subject matter wherein the secondary member and the sliding contact stationary with respect thereto are mounted on the induction motor shaft and the shaft is mechanically coupled to another dynamoelectric device. | |
736 | .... Slip rings connected to dynamoelectric machine winding: |
This subclass is indented under subclass 735. Subject matter wherein the dynamoelectric device has windings and the secondary winding of the induction motor is connected through the sliding contacts to a winding of the dynamoelectric device. | |
737 | . Self-cascaded motor windings: |
This subclass is indented under subclass 727. Subject matter wherein the relatively movable members consist
of plural windings on each separate member, a first winding
on one member being in inductive relation with a second winding
on the other member, a third winding on the other member
being connected to the second winding, and a fourth winding
on the one member being connected to the third winding.
SEE OR SEARCH THIS CLASS, SUBCLASS:
| |||||||||||
738 | . With commutated winding: |
This subclass is indented under subclass 727. Subject matter wherein the primary winding, secondary
winding, or some other winding of the motor is energized
through a rotary switch at least one contact of which is stationary
with respect to the energized winding and another contact rotates
relative thereto with some other part of the motor.
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| |||||||||||||||||
739 | . Reversing: |
This subclass is indented under subclass 727. Subject matter wherein the system connected to the primary
winding of the motor includes means to change the direction of the
rotation of the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
| |||||||||
740 | .. With diverse motor operation: |
This subclass is indented under subclass 739. Subject matter wherein the system includes means to perform
some additional motor operation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
| |||||
741 | ... With braking: |
This subclass is indented under subclass 740. Subject matter wherein the additional operation is braking.
SEE OR SEARCH THIS CLASS, SUBCLASS:
| |||||||||||
742 | .... Electromagnetic brakes: |
This subclass is indented under subclass 741. Subject matter wherein the braking action is a result of
electromagnetic force.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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743 | ..... Generator action: |
This subclass is indented under subclass 742. Subject matter wherein the braking is a result of electromagnetic
energy created within the motor as a result of the rotation of the
motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
| |||||||
744 | ..... Plugging: |
This subclass is indented under subclass 742. Subject matter wherein the electromagnetic action is a result
of reversal of current or phase reversal within the primary member
of the energized motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
| |||||
745 | .. With controlled saturable reactor in primary circuit: |
This subclass is indented under subclass 739. Subject matter wherein the system includes a controlled saturable magnetic device having a control winding and a power winding, the power winding being connected between a power source and the primary winding of the motor, and the control winding being energizable to vary the impedance and the phase of the power winding to reverse the rotation of the motor. | |
746 | ... Two phase motor: |
This subclass is indented under subclass 745. Subject matter wherein the motor reversed is a two phase motor. | |
747 | .. Two phase motor: |
This subclass is indented under subclass 739. Subject matter wherein the motor reversed is a two phase motor. | |
748 | ... With plural primary windings or winding portions having common connection: |
This subclass is indented under subclass 747. Subject matter wherein the primary motor member includes two windings each having an end connected to form a common terminal or a single winding having a center tap. | |
749 | .. Operating from a single phase source: |
This subclass is indented under subclass 739. Subject matter wherein the energized motor is powered by
a single phase source.
| |||
750 | ... Shaded pole motor: |
This subclass is indented under subclass 749. Subject matter wherein the energized motor has a main magnetic
field and the reversing means includes auxiliary motor windings which
develop a magnetic field out of phase with the main field to change
the direction of the resultant field to reverse the motor.
| |||
751 | ... Split phase motor with capacitor interchangeably connected in series with either primary winding: |
This subclass is indented under subclass 749. Subject matter wherein the primary member includes two windings, a capacitor, and means to connect either winding with the capacitor so that the motor can selectively rotate in either direction. | |
752 | .... With controlled electronic device to provide the series connection: |
This subclass is indented under subclass 751. Subject matter wherein the means to connect either winding with the capacitor includes a three terminal electronic device where two of the terminals pass current through the device under the control of the third terminal which thereby determines which winding is in circuit with the capacitor or permits current to flow through the windings and the capacitor. | |
753 | ... With de-energizable start winding: |
This subclass is indented under subclass 749. Subject matter wherein the primary member includes a run
and a start winding and the reversing means includes means to apply power
to both of the windings and to cut out the start winding after the
motor has come up to speed.
| |||||
754 | .... With separate winding or winding portion energized for each direction of rotation: |
This subclass is indented under subclass 753. Subject matter wherein the run or the start winding has more than one winding or has tapped portions and the reversing means has a switch means connecting the one or the other winding or both winding or a portion of the windings to reverse the direction of the motor. | |
755 | .... Automatic current reversal on start winding: |
This subclass is indented under subclass 753. Subject matter wherein the reversing means includes a self-acting
switch which reverses the direction of the current through the start
winding after the start and the run windings are energized so that
when the start winding is de-energized and subsequently
reenergized the motor will rotate in the other direction.
| |||||
756 | .. With controlled electronic switch for phase reversal: |
This subclass is indented under subclass 739. Subject matter wherein the means to change direction of
the motor includes an on-off electronic device with a control
terminal which operates to determine when to permit or stop the
transfer of power through the device itself from a power source
to the motor or through a relay actuated by the on-off
device.
| |||
757 | . Braking: |
This subclass is indented under subclass 727. Subject matter wherein the system includes means or devices
for applying a torque or force to the motor in a direction opposite
to the torque or force of the motor for the purpose of slowing down
or stopping the rotation of the motor.
| |||
758 | .. With diverse operation: |
This subclass is indented under subclass 757. Subject matter wherein there is included means to perform
an additional motor operation.
| |||
759 | .. Dynamic braking: |
This subclass is indented under subclass 757. Subject matter wherein the means for applying a torque or
force to the motor includes the primary and secondary members of
the motor which when rotating relative to each other interact to
form a generator action which produces a force opposite to the motor
rotation to slow down or stop the motor.
| |||
760 | ... Direct current primary winding braking circuit: |
This subclass is indented under subclass 759. Subject matter wherein the means for applying a torque or force to the motor includes circuitry to apply direct current to the primary member so that the rotation of the motor causes the primary member to develop an induced voltage which causes a force in a direction opposite to the motor rotation to slow down or stop the motor. | |
761 | .... Rotating rotor controls braking current in primary winding: |
This subclass is indented under subclass 760. Subject matter wherein the rotating part of the motor controls the primary circuitry so as to apply direct current to the primary member. | |
762 | .... With A.C. to D.C. conversion circuit: |
This subclass is indented under subclass 760. Subject matter wherein the circuitry includes an electrical device which transforms an alternating current into direct current for the primary member of the motor. | |
763 | .. Reversal of power to primary winding: |
This subclass is indented under subclass 757. Subject matter wherein the means for applying a torque or
force to the motor includes circuitry to change the direction of
current or the phase through the primary winding of the motor to create
an electromagnetic force in the secondary winding of the motor in
a direction opposite to the direction of rotation of the motor to slow
down or stop the motor.
| |||
764 | ... Three phase power reversal: |
This subclass is indented under subclass 763. Subject matter wherein the circuitry to change the direction of current or the phase is in a three phase motor circuit. | |
765 | .. Eddy current braking circuits: |
This subclass is indented under subclass 757. Subject matter wherein the motor rotor has an electrical conducting member connected thereto and an electrical winding associated with the conducting member such that current passing through the winding creates a changing electromagnetic field within the conducting member which induces eddy currents which create an electromagnetic force in a direction which opposes rotation of the motor to slow or stop the motor. | |
766 | . Primary and secondary circuits: |
This subclass is indented under subclass 727. Subject matter wherein the system to supply and or control
connected to the motor includes an electric circuit connected to
both the primary and to the secondary winding of the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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767 | . Primary circuit control: |
This subclass is indented under subclass 727. Subject matter wherein the system to supply and or control
the motor includes a circuit connected to the primary winding of
the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
| |||||
768 | .. Three phase motor operated from single phase source: |
This subclass is indented under subclass 767. Subject matter wherein the circuit includes means to transform power from a single phase source into three phase power to energize a three phase motor. | |
769 | ... With dynamoelectric converter: |
This subclass is indented under subclass 768. Subject matter wherein the means to transform power from a single phase source into three phase power includes a rotary dynamoelectric machine. | |
770 | .. Dual voltage motors: |
This subclass is indented under subclass 767. Subject matter wherein the motor is adapted to operate from either of two possible alternating voltages and the circuit connects the primary member of the motor to one of the two alternating voltages. | |
771 | .. Delta-wye, plural wye, or plural delta connected primary windings: |
This subclass is indented under subclass 767. Subject matter wherein the primary member comprises a plurality
of windings and the circuit connected to the windings permits (a) a star-delta
connection of the windings, (b) two or
more star connections of the windings, (c) two
or more delta connections of the windings.
| |||||
772 | .. Plural speed: |
This subclass is indented under subclass 767. Subject matter wherein the primary member comprises a plurality
of windings or winding portions and the circuit includes means connected
to the windings or winding portions to cause the motor to rotate
at several nominal discrete speeds.
SEE OR SEARCH THIS CLASS, SUBCLASS:
| |||||||||||||
773 | ... Pole changing: |
This subclass is indented under subclass 772. Subject matter wherein the means connected to the windings provides a predetermined number of primary magnetic poles at one operating speed and a different number of poles for another operating speed. | |
774 | .... Single phase motor: |
This subclass is indented under subclass 773. Subject matter wherein the motor controlled is a single phase motor. | |
775 | ..... Separate primary running winding for each pole number, alternately energized: |
This subclass is indented under subclass 774. Subject matter wherein each predetermined number of poles is produced by the energization of a separate primary winding. | |
776 | ..... Entire primary running winding energized for each running speed: |
This subclass is indented under subclass 774. Subject matter wherein the means connected to the windings or winding portions electrically rearranged the windings or winding portions to produce a different number of poles and energize all of the windings or winding portions in all running speeds of the motor. | |
777 | .... Separate primary running winding for each pole number, alternately energized: |
This subclass is indented under subclass 773. Subject matter wherein each number of poles is produced by the energization of a separate primary winding. | |
778 | .. Starting control: |
This subclass is indented under subclass 767. Subject matter wherein the circuit provides means to supply electric energy to the motor or to control flow of the current in the primary circuit for initiating motor rotation or controlling the motor during acceleration from rest. | |
779 | ... With speed control: |
This subclass is indented under subclass 778. Subject matter wherein means are provided for controlling
motor speed during any mode of motor operation.
| |||
780 | ... Three phase motor with variable transformer to initially adjust voltage to motor windings: |
This subclass is indented under subclass 778. Subject matter wherein the circuit includes transformer
means to enable the application of a voltage value for starting
which is different from the voltage applied during running of a three
phase motor.
| |||
781 | ... Operating from a single phase source: |
This subclass is indented under subclass 778. Subject matter wherein the means to supply electric energy
to the motor is a single phase source of electric supply.
| |||
782 | .... With protective features: |
This subclass is indented under subclass 781. Subject matter wherein means are provided to protect the
motor from harmful operation.
SEE OR SEARCH CLASS:
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783 | ..... Thermal starting and thermal overload protection: |
This subclass is indented under subclass 782. Subject matter wherein the means to protect the motor includes heat responsive means for controlling the motor starting and for protecting against current overload in the motor. | |
784 | .... Impedance for reducing current during starting operation: |
This subclass is indented under subclass 781. Subject matter wherein the means to control the flow of current in the primary member or a portion thereof during starting includes impedance means. | |
785 | .... Start winding removed during running operation: |
This subclass is indented under subclass 781. Subject matter wherein the primary member consists of a
main primary winding and a start winding and the circuit includes
means for de-energizing the start winding by removing part or
all of the start winding from the circuit which supplies the electrical
energy to the start and the run winding.
| |||
786 | ..... By electronic switch: |
This subclass is indented under subclass 785. Subject matter wherein the means for removing part or all
of the start winding includes an electronic switch means to de-energize
the start winding.
SEE OR SEARCH CLASS:
| |||
787 | ...... With transformer for sensing the run winding current: |
This subclass is indented under subclass 786. Subject matter wherein the electronic switch means is controlled in response to the output voltage of a sensing transformer which provides a measure of the current flowing in the main winding circuit. | |
788 | ...... With variable temperature coefficient resistor in switch control circuit: |
This subclass is indented under subclass 786. Subject matter wherein the electronic switch means is controlled by a circuit which includes a resistor whose resistance is a function of its temperature. | |
789 | ..... By electromagnetic switch: |
This subclass is indented under subclass 785. Subject matter wherein an electromagnetic switch means is
provided for de-energizing the start winding.
SEE OR SEARCH CLASS:
| |||
790 | ...... With relay coil in series with main winding: |
This subclass is indented under subclass 789. Subject matter wherein the switch includes an operating coil for the electromagnetic switch in series with the main primary winding. | |
791 | ..... By thermal switch: |
This subclass is indented under subclass 785. Subject matter wherein a heat responsive switch means is provided for de-energizing the start winding. | |
792 | ...... With variable temperature coefficient impedance element: |
This subclass is indented under subclass 791. Subject matter wherein the heat responsive switch means includes an element whose impedance is a function of its temperature. | |
793 | ..... By centrifugal switch: |
This subclass is indented under subclass 785. Subject matter wherein the start winding is de-energized by a switch actuated by centrifugal force developed by the rotating motor. | |
794 | .... Capacitor run motor with different capacitance at starting: |
This subclass is indented under subclass 781. Subject matter wherein the motor is a split phase motor and the primary member has two or more primary windings energized in both the starting and the running modes of operation, at least one winding having in circuit therewith capacitance whose value is different in each operating mode. | |
795 | ..... With plural capacitors: |
This subclass is indented under subclass 794. Subject matter wherein there are two or more capacitors to change the effective capacitance in circuit with at least one winding. | |
796 | .... Saturable winding in capacitor run motor circuit: |
This subclass is indented under subclass 781. Subject matter wherein there is a split phase capacitance motor having a saturable winding in circuit with the capacitor and the primary windings, which has a reactance value in the starting mode different from that of its reactance in the running mode. | |
797 | .... Phase splitting using stator winding mutual inductance or saturable winding: |
This subclass is indented under subclass 781. Subject matter wherein the primary member includes two or more primary windings and the mutual inductance between the windings or a saturable winding is used to cause a phase splitting effect between the windings to create the starting torque to rotate the motor. | |
798 | .. Responsive to motor condition: |
This subclass is indented under subclass 767. Subject matter wherein means is provided to sense a motor
condition and the circuit connected to the primary member of the
motor is controlled by the sensing means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
| |||||
799 | ... Responsive to speed or rotation phase angle: |
This subclass is indented under subclass 798. Subject matter wherein the means to sense is responsive to the speed or the rotational phase angle of the motor being controlled or a device driven by the motor. | |
800 | .... With controlled power conversion: |
This subclass is indented under subclass 799. Subject matter wherein the circuit connected to the primary member of the motor includes a power conversion means controlled by the speed or rotational phase angle responsive means. | |
801 | ..... Including inverter: |
This subclass is indented under subclass 800. Subject matter wherein the power conversion means includes
one or more inverter circuits.
| |||
802 | ...... Responsive to an additional condition: |
This subclass is indented under subclass 801. Subject matter wherein the circuit connected to the primary
member of the motor is responsive to another condition as well as
being responsive to the speed or the rotational phase angle of the
motor.
| |||
803 | ....... With controlled AC to DC circuit in inverter supply: |
This subclass is indented under subclass 802. Subject matter wherein the one or more inverter circuits
includes an AC to DC converter having means to adjust the direct
current output voltage of the converter.
| |||
804 | .... With controlled magnetic reactance: |
This subclass is indented under subclass 799. Subject matter wherein the circuit connected to the primary
member of the motor includes a controlled magnetic reactance.
| |||
805 | ... Responsive to motor voltage: |
This subclass is indented under subclass 798. Subject matter wherein the motor condition sensed is the motor voltage. | |
806 | .. Condition responsive: |
This subclass is indented under subclass 767. Subject matter wherein there is means to sense a condition
other than a motor condition and the circuit connected to the primary
member of the motor is controlled by the means to sense the condition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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807 | .. Frequency control: |
This subclass is indented under subclass 767. Subject matter wherein the circuit connected to the primary
member of the motor includes means to regulate the frequency of
the current or voltage supplied to the primary member.
| |||
808 | ... With voltage magnitude control: |
This subclass is indented under subclass 807. Subject matter wherein means are also provided to regulate
the magnitude of the voltage applied to the primary member of the
motor.
| |||
809 | ... With voltage phase angle control: |
This subclass is indented under subclass 807. Subject matter wherein the voltage supplied to the primary
member is a repetitious sinusoidal waveform and the means to regulate
the frequency of the voltage supplied to the primary member includes
means to regulate the phase angle of the waveform at which the remainder of
the waveform of each cycle is applied to the primary member.
| |||||
810 | ... With voltage pulse time control: |
This subclass is indented under subclass 807. Subject matter wherein the voltage waveforms applied to
the primary member of the motor is a pulse waveform having alternating
positive and negative polarity portions, and the means to
regulate the frequency of the voltage includes means to regulate
the time at which the pulses are started and ended.
| |||
811 | .... Pulse width modulation or chopping: |
This subclass is indented under subclass 810. Subject matter wherein each positive and negative polarity portion of the applied waveforms comprises a plurality of pulses of variable width. | |
812 | .. Voltage control: |
This subclass is indented under subclass 767. Subject matter wherein the circuit connected to the primary
member of the motor includes means for regulating the voltage applied
to the circuit.
| |||
813 | ... With transformer: |
This subclass is indented under subclass 812. Subject matter wherein the means for regulating the voltage
includes a transformer.
SEE OR SEARCH CLASS:
| |||
814 | ... With impedance control: |
This subclass is indented under subclass 812. Subject matter wherein the means for regulating the voltage includes a variable impedance. | |
815 | .... Saturable reactor: |
This subclass is indented under subclass 814. Subject matter wherein the variable impedance is a saturable reactor. | |
816 | ... Single phase, split phase motors: |
This subclass is indented under subclass 812. Subject matter wherein the motor is operated from a single phase source as a split phase motor. | |
817 | .... With capacitor: |
This subclass is indented under subclass 816. Subject matter wherein a capacitor is used to effect phase splitting in the motor. | |
818 | . Secondary circuit control: |
This subclass is indented under subclass 727. Subject matter wherein the system to supply and or control
the motor includes a circuit connected to the secondary member of
the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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819 | .. Open secondary member or portion thereof with means to open or close the circuit thereto: |
This subclass is indented under subclass 818. Subject matter wherein the circuit connected to the secondary
member includes switch means to turn off or on the current in the
secondary member or a portion thereof.
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820 | .. Closed secondary member or member portion with means to change electrical characteristics thereof: |
This subclass is indented under subclass 818. Subject matter wherein the secondary member or a portion thereof is always in a closed electrical path with the circuit and the circuit includes means connectable to the member or member portion to change the electrical characteristics thereof. | |
821 | .. Impedance control of secondary circuit: |
This subclass is indented under subclass 818. Subject matter wherein the circuit includes an electrical
impedance element of the resistive, inductive, or
the capacitive type to control the current in the secondary member
of the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
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822 | ... Responsive to motor condition: |
This subclass is indented under subclass 821. Subject matter wherein the impedance element of the circuit
is controlled by a motor characteristic.
| |||||
823 | .... Rotor speed or position responsive: |
This subclass is indented under subclass 822. Subject matter wherein the motor characteristics are the
motor rotor speed or the position of the rotor with respect to the
inducing magnetic field of the motor.
SEE OR SEARCH CLASS:
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824 | ..... Centrifugal force of rotor controls secondary circuit impedance: |
This subclass is indented under subclass 823. Subject matter wherein a mass movable radially of the motor
rotor in response to a force caused by the speed rotation of the
rotor controls the impedance element of the circuit.
SEE OR SEARCH CLASS:
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825 | .... Induction motor current: |
This subclass is indented under subclass 822. Subject matter wherein the motor characteristic is the current
flowing in a member of the motor.
SEE OR SEARCH CLASS:
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826 | ..... Primary motor current: |
This subclass is indented under subclass 825. Subject matter wherein the current is flowing in a primary
member of the motor.
| |||
827 | .... Frequency of secondary current: |
This subclass is indented under subclass 822. Subject matter wherein the motor characteristic is the frequency
of the voltage induced in the secondary member or the relative frequencies of
the current in the primary and the secondary members of the motor.
SEE OR SEARCH CLASS:
| |||||
828 | .... Secondary voltage: |
This subclass is indented under subclass 822. Subject matter wherein the motor characteristic is the voltage
of the secondary circuit of the motor or the voltage across an impedance
element of the motor secondary circuit.
SEE OR SEARCH CLASS:
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829 | ... By manual operation: |
This subclass is indented under subclass 821. Subject matter wherein the impedance element of the circuit
is controlled totally by manual means requiring only human force.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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830 | . With relatively movable cooperating motor parts to control energized motor: |
This subclass is indented under subclass 727. Subject matter wherein the motor includes plural cooperating
members which are movable relative to each other physically and
means to move the members with respect to each other, this
relative movement is in addition to motion caused by the electromagnetic
interaction between the rotor and the stator of the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
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831 | .. Axially movable cooperating parts: |
This subclass is indented under subclass 830. Subject matter wherein one of the two relatively movable
parts is movable in the direction of an axis.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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832 | .. Dual stators, one or both angularly movable: |
This subclass is indented under subclass 830. Subject matter wherein the motor includes a double stator and at least one stator is angularly movable with respect to the other stator. | |
244 | ALTERNATING CURRENT COMMUTATING MOTORS: |
This subclass is indented under the class definition. Subject matter in which the motor is an alternating-current
commutation motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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245 | . Universal or A.C.-D.C. motors: |
This subclass is indented under subclass 244. Subject matter in which the motor is designed and constructed
to run when connected directly and solely to either a direct-current
or an alternating-current source.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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246 | SERIES MOTORS: |
This subclass is indented under the class definition. Subject matter in which the motor is provided with means
for causing it to operate only as a series motor for at least an
appreciable portion of its operation as a motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
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247 | . Convertible for nonseries motor operation: |
This subclass is indented under subclass 246. Subject matter in which means are provided for operating
the motor as a series motor, and also operating the motor
as a nonseries motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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248 | . With plural, diverse or diversely connected or controlled sources of e.m.f.: |
This subclass is indented under subclass 246. Subject matter in which two or more immediate sources of
e.m.f. are provided to supply electric
energy to the conducting elements of a series motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
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249 | . Control by motor circuit impedance: |
This subclass is indented under subclass 246. Subject matter in which impedance means are provided for
controlling the series motor circuits.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
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250 | .. Impedance in series with field windings and in parallel to armature winding: |
This subclass is indented under subclass 249. Subject matter in which the impedance means is connected in series with all, or a part, of the series field winding and simultaneously connected in parallel with part, or all of the armature winding of the motor. | |
251 | . Field circuit control: |
This subclass is indented under subclass 246. Subject matter in which means are provided for controlling
the circuit of the field-producing winding.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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252 | .. Plural, diverse or diversely connected or controlled field coils: |
This subclass is indented under subclass 251. Subject matter in which the motor is provided with two or
more field windings, one or more of which are structurally
different, or connected in the motor circuit differently, or
controlled differently (e.g., with
respect to time, degree or magnitude of control, etc.) from
one or more others of the windings.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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253 | HOMOPOLAR OR UNIFORM FIELD MOTORS: |
This subclass is indented under the class definition. Subject matter in which the motor is a noncommutating electric
motor and comprises a magnetic-field producing means combined with
one or more electric conductors mounted to move relative to and
in proximity to the field-producing means, said
field-producing means being so constructed and/or
energized that the magnetic field produced thereby is, at any
instant of time, of the same polarity or direction throughout
its extent with reference to the path of travel of the movable electric conductor
or conductors.
SEE OR SEARCH CLASS:
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254.1 | SWITCHED RELUCTANCE MOTOR COMMUTATION CONTROL: |
This subclass is indented under the class definition. Subject matter in which the rotor element tends to assume
a predetermined angular position when the motor is continuously
energized and is provided with a commutator or circuit making and
breaking device which is actuated by the motor to determine the
instants of time at which the field producing windings thereof are
energized and de-energized relative to the angular position
of the rotary element.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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254.2 | . Having asymmetric half-bridge: |
This subclass is indented under subclass 254.1. Subject matter wherein the circuit making or breaking means
includes a bridge circuit wherein each side of the bridge contains
both a transistor (or switch) and a diode and
the motor is connected between the transistor and the diode.
Figure 1. Typical circuit configurations. SEE OR SEARCH THIS CLASS, SUBCLASS:
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255 | PLURAL DIVERSE MOTOR CONTROLS: |
This subclass is indented under the class definition. Subject matter in which means are provided for effecting
or causing two or more diverse operations of an electric motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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256 | . Motor-reversing: |
This subclass is indented under subclass 255. Subject matter in which means are included for causing an
electric motor to reverse its direction of operation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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257 | .. With running-speed control: |
This subclass is indented under subclass 256. Subject matter in which means are provided for also controlling
the running-speed of an electric motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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258 | ... And braking: |
This subclass is indented under subclass 257. Subject matter in which means are provided for also effecting
braking of the electric motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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259 | .... And acceleration control: |
This subclass is indented under subclass 258. Subject matter in which means are provided for also controlling
acceleration of an electric motor.
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260 | ... And acceleration control: |
This subclass is indented under subclass 257. Subject matter in which means are provided for also controlling
the acceleration of an electric motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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261 | .. With braking: |
This subclass is indented under subclass 256. Subject matter in which means are also provided for effecting
braking control of the electric motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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262 | ... And acceleration control: |
This subclass is indented under subclass 261. Subject matter in which means are also provided for acceleration
control of the electric motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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263 | .. With acceleration control: |
This subclass is indented under subclass 256. Subject matter in which means are provided for also controlling
the acceleration of the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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264 | .. With automatic starting and/or stopping: |
This subclass is indented under subclass 256. Subject matter in which means are also provided for automatically
starting and/or stopping the motor in response to predetermined conditions.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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265 | ... Stopping upon predetermined movement of or position of motor or driven device: |
This subclass is indented under subclass 264. Subject matter in which means are provided for effecting
stopping of the motor after it or the load device driven thereby
has moved a predetermined amount or has reached or attained a predetermined
position.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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266 | .... At limit-of-travel of motor or driven device: |
This subclass is indented under subclass 265. Subject matter in which means are provided for stopping
the electric motor when it, or a load device driven thereby, substantially
reaches its limit of travel.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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267 | ..... Dual control circuits alternately energized: |
This subclass is indented under subclass 266. Subject matter in which the control means for reversing
and starting and/or stopping comprise two circuits the
energization of one of which controls the starting in one direction
and the energization of the other of which effects starting in the
opposite direction and in which the arrangements are such that, with
one of the circuits energized for operation in one direction, when
the motor is automatically stopped at its limit of travel, it
cannot be started until the other circuit is energized.
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268 | . Running-speed control: |
This subclass is indented under subclass 255. Subject matter in which means are also provided for controlling
the running-speed of the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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269 | .. With braking: |
This subclass is indented under subclass 268. Subject matter in which means are provided for also effecting
braking of the electric motor.
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270 | ... And acceleration control: |
This subclass is indented under subclass 269. Subject matter in which means are provided for also controlling
the acceleration of the motor.
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271 | .. With acceleration control: |
This subclass is indented under subclass 268. Subject matter in which means are also provided for controlling
the acceleration of the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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272 | .. With automatic starting and/or stopping: |
This subclass is indented under subclass 268. Subject matter in which means are provided for also automatically
starting and/or stopping the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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273 | . Motor braking: |
This subclass is indented under subclass 255. Subject matter in which means are provided for also braking
the electric motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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274 | .. With acceleration control: |
This subclass is indented under subclass 273. Subject matter in which means are provided for also controlling
acceleration of the motor.
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275 | .. With automatic starting and/or stopping: |
This subclass is indented under subclass 273. Subject matter in which means are provided for also automatically
starting and/or stopping the electric motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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276 | . Acceleration control: |
This subclass is indented under subclass 255. Subject matter in which means are provided for also controlling
the acceleration of the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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277 | .. With automatic starting and/or stopping: |
This subclass is indented under subclass 276. Subject matter in which means are also provided for automatically
effecting the starting and/or stopping of the motor in
response to one or more predetermined conditions.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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278 | ... In response to an electrical condition: |
This subclass is indented under subclass 277. Subject matter in which means are provided for starting and/or stopping the electric motor in response to one or more conditions of which at least one is an electrical condition. | |
279 | .... Automatic stopping means less responsive during acceleration: |
This subclass is indented under subclass 278. Subject matter in which the automatic control means comprises
means responsive to an electrical condition for stopping the motor
which means, however, has been rendered inoperative or
is otherwise less responsive to the electrical condition during
the acceleration period of the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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280 | MOTOR-REVERSING: |
This subclass is indented under the class definition. Subject matter in which means are provided for causing an
electric motor to operate in one direction at one time and in the
opposite direction at another time, or for causing an electric
motor to operate in a direction opposite to that in which it has
previously been operating.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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281 | . Periodic- or intermittent-reversing: |
This subclass is indented under subclass 280. Subject matter in which means are provided for repeatedly
reversing the direction of operation of the motor in accordance
with the schedule of operation of a continuously operating controller.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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282 | .. In response to movement or position (e.g., limit of travel) of motor or driven device: |
This subclass is indented under subclass 281. Subject matter in which means are provided for reversing
the motor in response to a predetermined number of revolutions of
or other movement or position of the electric motor or of the load
device actuated thereby.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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283 | . Automatic and/or with time-delay means: |
This subclass is indented under subclass 280. Subject matter wherein means responsive to a predetermined
condition are provided for controlling the motor reversing means
or where time delay means are provided for controlling the motor
reversing means after operation thereof has been initiated.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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284 | .. With means to delay reversing until motor substantially stops: |
This subclass is indented under subclass 283. Subject matter in which means are provided for delaying
the application of electric energy to the motor in the reverse direction
for reversing the motor until the motor has substantially stopped
or has substantially come to rest from a previous operation in the
opposite direction.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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285 | .. Instant of, or passage or predetermined time or having time-delay means: |
This subclass is indented under subclass 283. Subject matter in which means are provided for initiating
the reversal of a motor at a particular instant of time (e.g., 8:30
A.M., 5:00 P.M.) or after
the lapse or passage of a predetermined interval of time (e.g., 4
seconds, 4 hours) or for delaying or retarding
the application of reverse power to a motor for a predetermined
interval of time after the reversing control operation has been
initiated.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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286 | .. Movement or position of motor or driven device: |
This subclass is indented under subclass 283. Subject matter in which means are provided for reversing
the motor in response to a predetermined number of revolutions or
other movement of, or to a predetermined position of, the motor
or a load device actuated thereby.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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287 | . Armature or primary circuit control: |
This subclass is indented under subclass 280. Subject matter in which means are provided for effecting
reversal of the motor by means in the armature or primary circuit
of the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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288 | .. Plural, diverse or diversely controlled armature windings: |
This subclass is indented under subclass 287. Subject matter in which the reversal is effected by means
of two or more armature or primary winding, one or more
of which are structurally different or controlled differently from
one or more others of the windings.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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289 | ... Phase-reversal: |
This subclass is indented under subclass 288. Subject matter in which the motor is an alternating current
motor having two or more phase windings and in which means are provided
for reversing the time phase sequence of the currents supplied to
two or more of the phase windings.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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290 | ... Selectively energized windings: |
This subclass is indented under subclass 288. Subject matter in which means are provided for selectively
energizing one or more of the armature windings without energizing
one or more others thereof to effect reversal of operation of the
motor.
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291 | .. Armature or primary current reversal: |
This subclass is indented under subclass 287. Subject matter in which means are provided for reversing
the direction of current flow in the armature or primary circuit
conductors of the motor.
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292 | ... By shifting motor brushes or selecting appropriate set of brushes: |
This subclass is indented under subclass 291. Subject matter in which means are provided for shifting
the commutator brushes to which the armature circuit is connected, or
in which means are provided for selectively using one set of brushes
at one time and using another set at another time.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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293 | ... Reversing polarity of current supplied to armature circuit: |
This subclass is indented under subclass 291. Subject matter in which means are provided for reversing
polarity of the current supplied to the armature or primary circuit
of the motor.
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294 | .... Wheatstone bridge type: |
This subclass is indented under subclass 293. Subject matter in which a plurality of electrical devices
are provided and connected in a Whetstone bridge arrangement, the
output circuit of which arrangement is connected to the armature
circuit of the motor.
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295 | .... Potentiometer-controlled: |
This subclass is indented under subclass 293. Subject matter in which means for providing current of reversible
polarity comprise an impedance device having one or more conductors
positionable in energy transfer relationship to the impedance and
movable therealong.
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296 | . Field circuit control: |
This subclass is indented under subclass 280. Subject matter in which means are provided for effecting
reversal of the motor by means in the field circuit of the motor.
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297 | .. Plural, diverse or diversely controlled field windings: |
This subclass is indented under subclass 296. Subject matter in which the motor is provided with two or
more field-producing windings one or more of which is structurally
different, differently connected, or controlled
differently than one or more others of the windings.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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298 | ... Simultaneous energization: |
This subclass is indented under subclass 297. Subject matter in which means are provided for energizing
all of the field windings at the same time.
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299 | .... With means for short-circuiting a winding: |
This subclass is indented under subclass 298. Subject matter in which means are provided for establishing
an electrical path of negligible impedance across the terminals
of one of the field producing windings so that said winding becomes
substantially de-energized when the electrical path is
closed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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300 | .. Field-circuit current reversed: |
This subclass is indented under subclass 296. Subject matter in which means are provided for reversing
the flow of current in the motor field producing winding.
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362 | BRAKING: |
This subclass is indented under the class definition. Subject matter in which means are provided for braking the
motor.
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363 | . "Spotting" or adjustment of braking controller during coasting: |
This subclass is indented under subclass 362. Subject matter in which means are provided for controlling the back voltage or counter-electro-motive-force of the motor while the motor is in motion and its armature or primary circuit is disconnected from its power source so that if or when the motor is reconnected to its source of power, a surge of current flow from the motor to the source will not take place, thus avoiding excessive or undesirable braking action at the time of reconnection to the source. | |
364 | . Automatic and/or with time-delay means: |
This subclass is indented under subclass 362. Subject matter in which means are provided for sensing the
existence of a predetermined condition which sensing means in turn
initiates the operation of means for controlling the braking of
the motor, or where time delay means are provided for controlling
the motor braking means after the operation has been initiated.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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365 | .. Plural diverse conditions or with time delay: |
This subclass is indented under subclass 364. Subject matter in which sensing means are provided which
respond to two or more conditions which are diverse in kind (e.g., temperature, voltage, current, etc.), or
which respond to different characteristics (e.g., magnitude
and rate-of-change of a condition) of
a single condition, or which respond to one or more conditions
in combination with means for effecting a predetermined time delay
in the functioning of the braking means after the operation thereof
has been initiated manually or otherwise.
SEE OR SEARCH THIS CLASS, SUBCLASS:
| |||
366 | .. Condition of motor or driven device: |
This subclass is indented under subclass 364. Subject matter in which the sensing means are responsive
to a condition in or of the motor being braked or a device actuated
by the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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367 | ... Armature or primary current: |
This subclass is indented under subclass 366. Subject matter in which the sensing means is responsive
to the magnitude or the rate-of-change of the
magnitude of the electric current in the armature or primary circuit
of the motor being braked.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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368 | ... Armature or primary circuit voltage or terminal or counter e.m.f. voltage: |
This subclass is indented under subclass 366. Subject matter in which the sensing means are responsive
to the magnitude of, or the rate-of-change
of the magnitude of the terminal voltage or the counter-electromotive-force
of the motor being braked.
SEE OR SEARCH THIS CLASS, SUBCLASS:
| |||
369 | ... Speed, acceleration, movement or position of motor or driven device: |
This subclass is indented under subclass 366. Subject matter in which the sensing means are responsive
to the speed (or rate-of-change thereof) degree
or amount of movement, or the position (angular
or linear) of the motor or device driven thereby.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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370 | . Plural, diverse or diversely controlled braking means: |
This subclass is indented under subclass 362. Subject matter in which two or more braking means are provided, one
or more of which braking means are structurally different, or
are differently controlled or are controlled by structurally different
means than one or more others of the braking means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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371 | .. Including both friction braking "plugging" and/or dynamic braking: |
This subclass is indented under subclass 370. Subject matter in which the plural braking means includes
friction braking means combined with "plugging" and/or
with dynamic braking.
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372 | . Friction braking: |
This subclass is indented under subclass 362. Subject matter in which the braking means comprises a frictional
contact surface adapted to engage a cooperating frictional surface which
is connected to or is a part of the movable output element of the
motor being braked.
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373 | . "Plugging" or application of reverse power to motor: |
This subclass is indented under subclass 362. Subject matter in which means are provided for applying
electric energy to an electric motor in such a direction or manner
that a torque or force is developed in the motor as a result of such
energization which torque or force opposes the tendency of the motor
to continue in motion if in motion, or to move if not in motion.
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374 | .. Energy flow interrupted when motor stops: |
This subclass is indented under subclass 373. Subject matter in which means are provided for interrupting
the flow of energy to the motor substantially at the time that the
motor speed is reduced to zero.
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375 | . Dynamic braking: |
This subclass is indented under subclass 362. Subject matter in which the motor to be controlled is braked
as a result of the motor being converted into an electric generator, which
supplies electric energy to an electric circuit.
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376 | .. Regenerative: |
This subclass is indented under subclass 375. Subject matter in which means are provided for returning
or delivering the electrical energy generated in the motor while
operating as a generator to the circuit which supplies the electric
energy to the motor when operating as a motor.
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377 | ... With additional source of e.m.f.: |
This subclass is indented under subclass 376. Subject matter in which means are provided for producing
a voltage comprising means other than that which constitutes the
source of armature or primary circuit voltage for the motor when
operating as a motor and other than the motor itself when operating
as a generator during braking.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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378 | .... In series with armature or primary circuit: |
This subclass is indented under subclass 377. Subject matter in which means are provided for connecting
the additional source of e.m.f. in series
with the armature or primary circuit of the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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379 | .. Locally closed armature circuit: |
This subclass is indented under subclass 375. Subject matter in which means are provided for immediately
connecting the terminals of the generating circuit of the motor
through an electrical circuit, with or without additional
control or dissipative devices in the last named circuit.
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380 | ... Closed through impedance or the like: |
This subclass is indented under subclass 379. Subject matter in which impedance devices or other current-controlling
devices are connected in the locally closed circuit.
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381 | ... With field or secondary circuit control: |
This subclass is indented under subclass 379. Subject matter in which means are provided for controlling
the field or secondary circuit of the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
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382 | . By auxiliary electric generator or by magnetic attraction or repulsion devices: |
This subclass is indented under subclass 362. Subject matter in which the braking means comprise (1) an
electric generator connected to be driven by the motor for the purpose
of braking the motor or (2) Magnetic-Flux-producing means
which operate directly through the agency of the flux, per
se, to oppose, by magnetic repulsion or by magnetic
attraction, the tendency of the motor to continue in motion, if in
motion, or to move if not in motion.
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383 | "ANTI-BRAKING" OR BRAKING-PREVENTION MEANS: |
This subclass is indented under the class definition. Subject matter in which means are provided for preventing
braking of an electric motor.
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430 | MOTOR LOAD, ARMATURE CURRENT OR FORCE CONTROL DURING STARTING AND/OR STOPPING: |
This subclass is indented under the class definition. Subject matter in which means are provided for controlling
the mechanical load actuated by the motor or for controlling the
motor armature or primary current, torque or force during
the starting and/or the stopping period of the motor.
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431 | . Initial, "cracking" or "starting from rest" torque control: |
This subclass is indented under subclass 430. Subject matter in which means are provided for controlling the motor torque at the instant of starting in order to insure that the motor torque is great enough to overcome the starting-from-rest or static friction opposition to motor movement. | |
432 | CONSTANT MOTOR CURRENT, LOAD AND/OR TORQUE CONTROL: |
This subclass is indented under the class definition. Subject matter in which means are provided for maintaining
substantially constant the magnitude of the motor armature or primary current, the
watts supplied to the motor, the mechanical load connected
or applied to the motor, or the torque or force exerted
by the motor.
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433 | . Control of motor load or device driven: |
This subclass is indented under subclass 432. Subject matter in which means are provided for maintaining a constant motor current, load, and/or torque control by controlling the physical load device actuated by the motor. | |
434 | LIMITATION OF MOTOR LOAD, CURRENT, TORQUE OR FORCE (E.G., PREVENTING OVERLOAD): |
This subclass is indented under the class definition. Subject matter in which means are provided for preventing
the load connected or applied to the motor, the armature
or primary current of the motor, the watts supplied to
the motor, or the torque or force exerted by the motor
from merely exceeding a predetermined maximum or predetermined minimum
value.
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436 | NONRUNNING, ENERGIZED MOTOR: |
This subclass is indented under the class definition. Subject matter in which means are provided for energizing
an electric motor to produce a substantial output force or torque
which is insufficient under prevailing conditions to cause the motor
to start.
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437 | PHASING OR ANGULAR OR LINEAR POSITIONAL CONTROL OF MOVABLE ELEMENT OF THE MOTOR: |
This subclass is indented under the class definition. Subject matter in which means are provided for positioning
or phasing the movable (working) element on an
electric motor with reference to some object, fixed or
in motion, or with reference to cyclic conditions or time.
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438 | POWER FACTOR CONTROL OF ARMATURE OR LINE CIRCUIT: |
This subclass is indented under the class definition. Subject matter in which means are provided for controlling
the power factor (i.e., the phase
angle between the line voltage and resulting line current which
is supplied to the primary circuit) of the energy supplied
by an alternating current source to the armature or primary circuit
of an electric motor.
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440 | HAVING PLURAL, DIVERSE OR DIVERSELY CONTROLLED SOURCES: |
This subclass is indented under the class definition. Subject matter in which two or more sources of electrical
energy are provided for the armature or primary circuit of electric motors
one or more of said sources (1) having one or
more characteristics (e.g., size, frequency, voltage, etc.) which
are substantially different from one or more corresponding characteristics
of one or more others of the sources, or (2) are
controlled substantially differently (e.g., with
respect to time, degree of control, type of control
means, etc.) from one or more others
of the sources.
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441 | . A.C. and D.C.: |
This subclass is indented under subclass 440. Subject matter in which one or more of the sources are an
alternating current type of source and one or more others of which
are a direct current type of source.
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442 | . Different voltages: |
This subclass is indented under subclass 440. Subject matter in which one or more of the sources have
a different (effective value) voltage than one
or more others of the sources.
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443 | PERIODIC, REPETITIOUS OR SUCCESSIVE OPERATIONS CONTROL OF MOTOR, INCLUDING "JOG" AND "INCH" CONTROL: |
This subclass is indented under the class definition. Subject matter in which means are provided for effecting
a motor operation two or more times in succession at regular or
irregular intervals of time.
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444 | . Variable periods or intervals between controlling operations: |
This subclass is indented under subclass 443. Subject matter in which means are provided for changing the periodicity or time interval of different motor operations. | |
445 | AUTOMATIC AND/OR WITH TIME-DELAY MEANS (E.G., AUTOMATIC STARTING AND/OR STOPPING): |
This subclass is indented under the class definition. Subject matter in which (1) means are provided
for sensing the existence of or the magnitude of a predetermined
condition (e.g., temperature, time, speed
of a device, etc.) combined with means
for controlling the motor and in which the sensing means initiates
the operation of the motor control means upon the occurrence of
the predetermined condition; and/or (2) in
which time-delay or retarding means are provided for retarding
or delaying the operation of the motor control means whether the
operation is initiated manually or automatically.
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446 | . With nonautomatic control means (e.g., manual): |
This subclass is indented under subclass 445. Subject matter in which means other than automatic means (e.g., manual
means) are also provided for effecting a particular control
of an electric motor.
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447 | . Nonresponsive or less responsive for limited periods: |
This subclass is indented under subclass 445. Subject matter in which means are provided for rendering
the sensing mechanism entirely nonresponsive or incapacitated, or
less responsive to the predetermined conditions for a particular and
limited period of time which is less than the time required for
an operating cycle of the motor.
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448 | . Anti-hunting: |
This subclass is indented under subclass 445. Subject matter in which means are provided for preventing
or for reducing the tendency of the motor control means to cause
the motor to "hunt" overtravel or to be over-compensated. The
systems included herein are "open loop" controls
and thus are not servomechanisms.
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449 | . With respect to a fixed standard, master or reference device: |
This subclass is indented under subclass 445. Subject matter in which means are provided for producing
a force, motion, or other quantitative characteristic
constituting a standard, master, or reference
value or quantity, in combination with means for comparing
such value or quantity with a value or quantity of a corresponding characteristic
derived from or as a result of the operation of the motor to be
controlled, and for controlling the motor in accordance
with the magnitude or variations in magnitude of the resultant of
the compared values or quantities.
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450 | .. Electrical detector: |
This subclass is indented under subclass 449. Subject matter in which the comparing means (i.e., the
means which detects a change in, or a difference between, the
values or quantities being compared) comprise electrical
means, e.g., coils, electric
meters or indicators, dynamoelectric machines, electrical
impedances, etc.
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451 | .. Mechanically vibrating device as reference device (e.g., tuning fork): |
This subclass is indented under subclass 449. Subject matter in which a tuning-fork or other mechanically
vibratable device is used as a standard, master, or
reference device with which the operation or control of the motor
is compared and controlled.
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452 | . Plural, diverse conditions or with time-delay means: |
This subclass is indented under subclass 445. Subject matter , (1) in which
the sensing means are provided with means which respond to two or
more conditions, one or more of which are diverse in type
or character than one or more others of the conditions or (2) in
which means are employed for sensing one or more conditions, diverse
or otherwise, in combination with means for delaying or
retarding the operation of the sensing means or the control means after
control thereof has been initiated by the sensing means.
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453 | .. Electrical condition: |
This subclass is indented under subclass 452. Subject matter in which the sensing means is responsive
to one or more electrical conditions (e.g., voltage, frequency, current, etc.).
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454 | ... Plural, diverse electrical conditions: |
This subclass is indented under subclass 453. Subject matter in which the sensing means respond to two
or more predetermined electrical conditions, one or more
of which conditions are different in kind or character (e.g., voltage, current, frequency, watts, power-factor, etc.) than
one or more others of the conditions.
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455 | .... Voltage and current (e.g., watts): |
This subclass is indented under subclass 454. Subject matter in which the sensing means are responsive
to both voltage and current including watts or watthours based on
both voltage and current.
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456 | . Rate-of-change of a condition: |
This subclass is indented under subclass 445. Subject matter in which the sensing means is responsive
to the rate-of-change of a condition (e.g., from
72° F to 73° F in 10 minutes, four (4) pounds
pressure change per hour, etc.).
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457 | .. Interia-type detector: |
This subclass is indented under subclass 456. Subject matter in which means are provided for sensing, detecting, or measuring the rate-of-change of a condition comprising a device having an inertia member which is relatively displaced in response to a rate-of-change of a condition. | |
458 | .. Electrical condition: |
This subclass is indented under subclass 456. Subject matter in which the sensing means is responsive to the rate-of-change of an electrical condition. | |
459 | . Terminal voltage or counter-electromotive force of controlled motor: |
This subclass is indented under subclass 445. Subject matter in which the sensing means are responsive
to the armature or primary circuit voltage, the terminal
voltage, or the counter-electromotive-force
of the motor being controlled.
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460 | . Sound, supersonic vibration or mechanical vibration: |
This subclass is indented under subclass 445. Subject matter in which the sensing means are responsive
to noise, sound, or other mechanical vibrations
of bodies.
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461 | . Speed or rate-of-movement: |
This subclass is indented under subclass 445. Subject matter in which the sensing means are responsive
to the speed (angular or linear velocity) or rate-of-movement
of the motor being controlled or of any other body.
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462 | .. Centrifugal-type detector: |
This subclass is indented under subclass 461. Subject matter in which the sensing means comprises a centrifugally
operating device for detecting the speed conditions.
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463 | .. Tachometer-type detector: |
This subclass is indented under subclass 461. Subject matter in which the sensing means comprises a tachometer
device.
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464 | ... Electric generator tachometer: |
This subclass is indented under subclass 463. Subject matter in which the speed sensing device comprises
an electric generator connected to be driven by and in proportion
to the speed of the motor or other moving body.
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465 | .. In excess of a predetermined valve: |
This subclass is indented under subclass 461. Subject matter in which means are provided for controlling
an electric motor in response to speeds of motors or of other bodies
when the speed is in excess or above a predetermined value.
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466 | . Movement, position, or limit-of-travel: |
This subclass is indented under subclass 445. Subject matter in which the sensing means are responsive
to a predetermined (1) movement (e.g., mere
condition of motion, number of revolutions, etc.), (2) limit-of-travel, or (3) other position (e.g., mere
presence of, altitude or elevation, etc.) of
the motor being controlled or of any body or device.
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467 | .. Plural sensing means for determining plural positions or plural limits-of travel: |
This subclass is indented under subclass 466. Subject matter in which two or more means are provided for
sensing or determining two or more positions or limits-of-travel
of the motor or other device. The systems included herein are "open-loop" controls
and thus are not servomechanisms.
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468 | .. Limit-of-travel control means: |
This subclass is indented under subclass 466. Subject matter in which the sensing means is responsive
to limit-of-travel of the working element of the
controlled motor or of any other device.
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469 | ... Overloading limit-of-travel-type control means: |
This subclass is indented under subclass 468. Subject matter in which means are provided for overloading
the motor automatically when the limit-of-travel
has been attained.
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470 | .. Magnitude of movement or revolutions: |
This subclass is indented under subclass 466. Subject matter in which the sensing means responds to the
mere magnitude of movement (e.g., linear
or angular displacements) of the motor being controlled
or of any other device.
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471 | . Responsive to thermal conditions: |
This subclass is indented under subclass 445. Subject matter in which the sensing means responds to thermal
or temperature conditions in or of any predetermined device or at
any predetermined place or position.
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472 | .. Of motor control means: |
This subclass is indented under subclass 471. Subject matter in which the sensing means is arranged to be responsive to the temperature or thermal conditions of an impedance in the circuit of the motor being controlled, or of other means employed for controlling the motor. | |
473 | .. In or about the motor being controlled: |
This subclass is indented under subclass 471. Subject matter in which the sensing means are connected
or arranged to be responsive to thermal condition in or immediately
about the motor being controlled.
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474 | . Motor load, armature or primary or secondary circuit current: |
This subclass is indented under subclass 445. Subject matter in which the sensing means responds to a
predetermined motor load, torque, armature or
primary circuit current, or secondary circuit current.
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475 | .. Mechanical-type detector (e.g., by yielding spring devices): |
This subclass is indented under subclass 474. Subject matter in which a mechanical device is provided
to sense or detect the existence of a predetermined load on the
motor.
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476 | .. In excess of a predetermined magnitude: |
This subclass is indented under subclass 474. Subject matter in which the sensing means responds when the magnitude of the load attains or exceeds a predetermined value. | |
477 | ... Intentionally increased load: |
This subclass is indented under subclass 476. Subject matter in which the load on the motor or the armature
or primary circuit of the motor is caused to be increased to a magnitude
in excess of or above a predetermined value at the will of an operator
or by means which is designated to, and will cause the
motor to be overloaded at a time selected by the operator or designer.
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478 | . Electrical conditions in circuit other than controlled motor circuit: |
This subclass is indented under subclass 445. Subject matter in which the sensing means responds to electrical conditions in circuits other than the circuit to which the motor being controlled is connected. | |
479 | .. Voltage: |
This subclass is indented under subclass 478. Subject matter in which the sensing means is responsive
to the voltage of the other circuit.
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480 | . Radiant energy: |
This subclass is indented under subclass 445. Subject matter in which the sensing means responds to the
mere presence or absence of, or the frequency, (i.e., color) intensity, magnitude or
amount of radiant energy.
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481 | . Pressure in a fluid or granular material: |
This subclass is indented under subclass 445. Subject matter in which the sensing means is responsive
to the pressure in, (1) a fluid medium (i.e., gaseous
or a liquid medium) or (2) a granular
medium (i.e., a mass of particulate
material or of discrete particles, such as, for
example, sand, wheat, grains, shot, etc.).
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482 | . Level of fluid or granular material: |
This subclass is indented under subclass 445. Subject matter in which the sensing means is responsive
to the level of (1) a fluid material or medium (i.e., a
gaseous or a liquid material or medium) or (2) a
granular (i.e., particulate
or discrete particles) material or medium (e.g., sand, grain, shot, etc.).
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483 | . Moisture content or wetness: |
This subclass is indented under subclass 445. Subject matter in which the sensing means is responsive
to the presence of, or the degree or amount of, moisture, wetness, or
humidity, in a solid, liquid, or gaseous
mass or body.
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484 | . Time or with time-delay means: |
This subclass is indented under subclass 445. Subject matter in which the sensing means are responsive
to the occurrence of a particular instant of time (e.g., 8:30
A.M., 5:00 P.M., etc.), or
to the passage of a predetermined interval of time (e.g., 20-minutes, 4-hours, etc.), or
in which means are provided for delaying or retarding the operation
of the motor control means (e.g., by
means of dash-pots, slow-speed operation
of the motor control means by a slow-speed motor or through
speed-reducing gearing, etc.).
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485 | .. Dash-pot or other mechanical delay means: |
This subclass is indented under subclass 484. Subject matter in which the time-delay means comprises
a dash-pot or other mechanical braking device for effecting
a time delay in the operation of the motor control means.
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486 | .. Pilot- or servo-motors: |
This subclass is indented under subclass 484. Subject matter in which the time-controlling or time-delay
means comprises a motor connected to actuate the control means, the
motor operating the control being designed so that an appreciable
amount of time elapse during the movement of the motor before the
control means is actuated.
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487 | .. Electromagnetic or inductive time-delay means: |
This subclass is indented under subclass 484. Subject matter in which the time-controlling or time-delay means comprises an electromagnetic device in the control circuit of the motor, the electromagnetic device having means for affecting the rate of rise and fall of the current through the electromagnet or for affecting the rate of increase or decrease in the magnetic flux associated with the electromagnet, for the purpose of controlling the time of operation of the control means. | |
488 | . Responsive to stress in body or material: |
This subclass is indented under subclass 445. Subject matter in which the sensing means are responsive
to physical tension, compression or other stress in a body
of material.
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489 | . Responsive to direction, inclination or angular position of bodies: |
This subclass is indented under subclass 445. Subject matter in which the sensing means are responsive
to direction, grade, inclination, angular
position, or to a deviation or change from a predetermined
value thereof. The systems included herein are "open-loop" controls and
thus are not servomechanisms.
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490 | WITH SIGNALS, METERS, RECORDERS OR TESTING DEVICES: |
This subclass is indented under the class definition. Subject matter in which means, in addition to the
motor supply and/or control system, are provided
for signalling, recording, metering or measuring, or
testing conditions in or about the motor and/or its system
of supply and/or control, or the operation or
the state of operation of the motor.
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491 | CONTROL OF BOTH MOTOR CIRCUIT AND MOTOR STRUCTURE: |
This subclass is indented under the class definition. Subject matter in which means are provided for controlling
the physical structure (e.g., shifting
commutator brushes, pole pieces or other magnetic structure, coil
position, etc., relative to other structure) of
an electric motor and for also controlling an electric circuit connected
to the motor for affecting the supply of energy to, or
the operation of the motor.
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492 | MOTOR MAGNETIC ENERGY DISSIPATION: |
This subclass is indented under the class definition. Subject matter in which means are provided for effecting, or
for controlling the dissipation of magnetic energy stored in magnetic circuit
of the field or secondary winding of an electric motor.
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493 | CONTROL OF BOTH ARMATURE (OR PRIMARY) CIRCUIT AND FIELD (OR SECONDARY) CIRCUIT: |
This subclass is indented under the class definition. Subject matter in which means are provided for controlling
the armature or primary circuit of the motor and also for controlling
the field or the secondary circuit of the motor.
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494 | ARMATURE (OR PRIMARY) CIRCUIT CONTROL: |
This subclass is indented under the class definition. Subject matter in which means are provided for controlling
the armature or primary circuit of the motor.
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495 | . Plural, diverse or diversely controlled, armature or primary windings: |
This subclass is indented under subclass 494. Subject matter in which two or more armature or primary
windings are provided on the motor and (1) in
which one or more of the windings are substantially different structurally
from one or more others of the windings (including being
different with respect to composition of winding, arrangement
or shape of the winding, or physical dimensions thereof) or (2) in
which one or more of the windings are controlled substantially differently
from one or more others of the windings (including control
at different time, different degrees of excitation, different kinds
or types of energizing currents, or polarized differently).
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496 | .. Polyphase windings: |
This subclass is indented under subclass 495. Subject matter in which the armature or primary windings
comprises two or more windings or sections thereof, one
or more of which are displaced in space relation to one or more others
of the windings and which windings or sections thereof are designed
and adapted to be connected to a polyphase source of supply (i.e., two
or more sources of alternating current having the same frequency
and being displaced in time phase relation to each other).
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497 | .. Series-parallel: |
This subclass is indented under subclass 495. Subject matter in which means are provided for connecting
the several armature or primary windings in series circuit relationship
with respect to each other at one time and in parallel circuit relationship
with respect to each other at another time; or for connecting
two or more of the windings in parallel circuit relationship with
respect to each other and for, simultaneously, connecting
two or more of the windings in series circuit relationship with
respect to each other.
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498 | .. Energized or controlled in predetermined sequence: |
This subclass is indented under subclass 495. Subject matter in which means are provided for energizing
or controlling a predetermined one of the windings and for, subsequently, energizing
or controlling another winding (i.e., for energizing
or controlling the windings in a predetermined order or sequence
which means may, however, be adjustable so as
to change from one predetermined order or sequence to another predetermined
order or sequence).
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499 | .. Wound or energized in magnetic opposition: |
This subclass is indented under subclass 495. Subject matter in which means are provided for energizing
one or more windings or turns so as to produce a magnetic flux in
one direction and for energizing one or more other windings or turns
so as to produce a flux (in the magnetic circuit of the
first named windings or turns) in a direction opposite
to the first named direction.
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500 | . Plural sources of voltage (including counter e.m.f. cells): |
This subclass is indented under subclass 494. Subject matter in which two or more sources of electromotive
force are connected in series, parallel, or series-parallel-circuit
relationship with respect to each other and in which one or more
of the sources are different in structure or are differently controlled (e.g., with
respect to time, magnitude of control, mode of
interconnection, etc.) from one or more
others of the sources so as to control the resultant voltage applied
to the motor armature.
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501 | . By shunting armature or primary winding: |
This subclass is indented under subclass 494. Subject matter in which means are provided for shunting
or short-circuiting in whole or in part the armature or
primary winding of a motor by a conductor or circuit of low impedance.
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502 | . Variable length or tapped armature winding: |
This subclass is indented under subclass 494. Subject matter in which means are provided for varying or
changing the effective length of the armature or primary winding
of an electric motor.
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503 | . Frequency or pulsation control: |
This subclass is indented under subclass 494. Subject matter in which means are provided for controlling
the frequency, or the rate of pulsations, of the
current supplied to the armature or primary circuit of the motor.
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504 | . Voltage control: |
This subclass is indented under subclass 494. Subject matter in which means are provided for controlling
the magnitude of the voltage supplied to the armature or primary
circuit of the motor being controlled.
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505 | . By means to space-discharge devices: |
This subclass is indented under subclass 494. Subject matter in which a space-discharge device
is connected in series or in parallel with the armature or primary
circuit of the motor.
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506 | .. Plural, diverse or diversely connected or controlled space-discharge devices: |
This subclass is indented under subclass 505. Subject matter in which a plurality of space-discharge
devices are provided, the principal electrodes of at least
one of which devices are connected to the armature or primary circuit
of the motor, and in which one of the space-discharge
devices is structurally different or is connected or arranged or
controlled differently than the other of the space-discharge
devices.
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507 | .. Having discharge-control means (e.g., grids): |
This subclass is indented under subclass 505. Subject matter in which the space-discharge device
includes a cathode, and anode, and (a) an
electrostatic element (e.g., a
control grid) which is adapted to have an electric potential established
between it and the cathode, or (b) a magnetic-field
producing means; wherein the elements (a), (b) are
positioned relative to the cathode and anode so as to control the
space-current flow between the cathode and the anode.
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508 | . Impedance-controlled: |
This subclass is indented under subclass 494. Subject matter in which means are provided for connecting
one or more impedance devices (e.g., resistors, reactors, capacitors) in
series and/or in parallel to the armature or primary circuit
of an electric motor.
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509 | .. Plural, diverse or diversely controlled impedances: |
This subclass is indented under subclass 508. Subject matter in which there are provided a plurality of
impedance devices each of which is directly connected in the armature
or primary circuit of the motor and in which one of the impedance
devices is structurally different, differently controlled
or connected than another of the impedances.
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510 | ... Including both reactor and condenser: |
This subclass is indented under subclass 509. Subject matter in which the impedances comprise a reactor
and a capacitor.
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511 | .. Inherently or self-variable impedance: |
This subclass is indented under subclass 508. Subject matter in which the impedance device is of the type
in which the impedance of the device inherently changes appreciably
in magnitude (e.g., with mere
lapse of time, change in potential applied thereto or current
flowing therethrough, change in temperature or physical
pressure applied thereto, etc.).
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512 | .. Inductive reactor controlled: |
This subclass is indented under subclass 508. Subject matter in which the impedance device comprises a
reactor or choke coil.
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513 | ... Having auxiliary means for saturating reactor core: |
This subclass is indented under subclass 512. Subject matter in which auxiliary means are provided for
saturating the magnetic core or a part thereof of the reactor.
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514 | .. Resistor-controlled: |
This subclass is indented under subclass 508. Subject matter in which the impedance device comprises a
resistor.
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515 | ... Having short-circuiting means: |
This subclass is indented under subclass 514. Subject matter in which means are provided for short circuiting
the resistor in whole or in substantial part by a conductor of negligible
resistance.
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516 | .... Short-circuited step-by-step: |
This subclass is indented under subclass 515. Subject matter in which means are provided for short circuiting
different sections or portions of the resistor at different times (i.e., without going
through all intermediate and infinitesimal values of resistance).
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519 | . By armature or primary circuit-making and/or breaking: |
This subclass is indented under subclass 494. Subject matter in which means are provided for making and/or
breaking the armature or primary circuit of the motor.
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520 | .. Electromagnetically actuated: |
This subclass is indented under subclass 519. Subject matter in which the circuit making and/or
breaking means are provided with electromagnetically operating means
for operating the circuit making and/or breaking means.
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521 | FIELD OR SECONDARY CIRCUIT CONTROL: |
This subclass is indented under the class definition. Subject matter in which means are provided for controlling (1) the
electric circuit which is connected to the magnetic-flux
producing means of the motor, or (2) the
electric circuit which is connected to the secondary (i.e., induced) member
of an alternating current motor.
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523 | . Plural, diverse or diversely connected or controlled field windings: |
This subclass is indented under subclass 521. Subject matter in which the motor is provided with two or
more field-producing windings one or more of which are
different structurally, connected differently, or
controlled differently or by different means, than one
or more others of the motors.
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524 | .. Convertible number-of-poles type (e.g., 4-pole or 6-pole): |
This subclass is indented under subclass 523. Subject matter in which means are provided for establishing
one number of field poles at one time and another number at another
time (e.g., 4-pole
and 6-poles).
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525 | .. Differentially wound or energized windings: |
This subclass is indented under subclass 523. Subject matter in which means are provided for energizing
one or more field producing windings, turns, or
conductors, so as to produce a magnetic field in one direction
in a magnetic path, and for energizing one or more other windings, turns, or
conductors so as to produce a magnetic field in the opposite direction
in the same magnetic path either at the same time or at different
times.
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526 | .. Series-parallel: |
This subclass is indented under subclass 523. Subject matter in which means are provided for connecting
the several field windings or conductors in series-circuit
relationship with respect to each other at one time and in parallel-circuit
relationship with respect to each other at another time, or
for connecting two or more of the windings in series circuit relationship
and two or more windings in parallel circuit relationship with respect
to each other all at the same time.
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527 | .. Series field winding: |
This subclass is indented under subclass 523. Subject matter in which means are provided for connecting
one or more of the field windings in series with the armature or
primary circuit of the motor.
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528 | .. With means to short circuit a field winding: |
This subclass is indented under subclass 523. Subject matter in which means are provided for short circuiting
a field winding in whole or in part with a conductor of substantially
negligible resistance.
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529 | .. Selectively energized: |
This subclass is indented under subclass 523. Subject matter in which means are provided for energizing
one or more of the field windings or conductors without energizing
one or more others.
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530 | . Plural, diverse or diversely connected or controlled sources of field circuit voltage: |
This subclass is indented under subclass 521. Subject matter in which there are provided two or more sources
of voltage for the motor field circuit, one or more of
such sources being different structurally, differently
connected or differently controlled than one or more others of the
sources.
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531 | . Variable length or tapped field winding: |
This subclass is indented under subclass 521. Subject matter in which means are provided for tapping or
otherwise varying the active length of a field winding.
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532 | . By means of space-discharge device in field circuit: |
This subclass is indented under subclass 521. Subject matter in which the principal electrodes (e.g., cathode
and anode) of a space-discharge device is connected
to the field winding circuit of an electric motor.
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533 | . Impedance-controlled: |
This subclass is indented under subclass 521. Subject matter in which impedance devices are provided in
the field circuit of a motor.
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534 | .. Plural, diverse or diversely connected or controlled field circuit impedances: |
This subclass is indented under subclass 533. Subject matter in which two or more impedances are provided
in the field circuit; one or more of which are structurally
different or are differently controlled or controlled by means which
are different with respect to each other, than one or more
others of the impedances.
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535 | ... Wheatstone bridge: |
This subclass is indented under subclass 534. Subject matter in which the several impedances are connected
in a Wheatstone bridge (i.e., four-arm) arrangement
with respect to each other.
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536 | . By field circuit making and/or breaking: |
This subclass is indented under subclass 521. Subject matter in which means are provided for physically
making and/or breaking the field circuit of the motor.
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537 | .. Intermittently operated: |
This subclass is indented under subclass 536. Subject matter in which means are provided for making and
breaking the circuit intermittently or repetitiously.
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538 | MOTOR STRUCTURE ADJUSTMENT OR CONTROL: |
This subclass is indented under the class definition. Subject matter in which means are provided for relatively
moving one or more structural elements of a motor relative to one
or more other structural elements of an electric motor.
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539 | . Both armature and field structures rotatable or adjustable: |
This subclass is indented under subclass 538. Subject matter in which means are provided for moving or
permitting to move, both the armature or primary member
of the motor and the field or secondary member of the motor.
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540 | . Rotor element movable axially: |
This subclass is indented under subclass 538. Subject matter in which means are provided for relatively
moving the rotor element axially (i.e., along
the axis about which the motor revolves) with respect to
the remainder of the motor structure.
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541 | . Brush or other current-collector control: |
This subclass is indented under subclass 538. Subject matter in which means are provided for moving or
adjusting the brushes or other current-collector or current-transfer
means of the motor.
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542 | .. Having movement toward or from cooperating part (e.g., brush lifted from commutator): |
This subclass is indented under subclass 541. Subject matter in which means are provided for moving the
brush or other current-collector or current-transfer
means toward or away from its cooperating part.
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543 | THREE-OR-MORE-POSITIONS MOTOR CONTROLLER SYSTEMS: |
This subclass is indented under the class definition. Subject matter in which the electric motor is controlled
or regulated by a controller having three or more definite positions
of control in which the degree or magnitude or kind of control at
any one position differs substantially from that which is obtained
when the controller is in either of at least two of the other positions.
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544 | . With other motor control device: |
This subclass is indented under subclass 543. Subject matter in which a three-or-more-position
controller is combined with some other motor control device between
which there is some particular inter-relationship; such
as, for example, a predetermined sequence of operation, a
mechanical or electrical interlock, etc.
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545 | .. Main line switch: |
This subclass is indented under subclass 544. Subject matter in which the three-or-more-position
controller is combined with a main line or armature or primary circuit
switch.
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546 | . Plural, diverse or diversely controlled controllers: |
This subclass is indented under subclass 543. Subject matter in which two or more three-or-more-position controllers are provided for controlling one or more motors, one of the controllers being different structurally or being differently controlled than another of the controllers. | |
547 | .. Plural control stations: |
This subclass is indented under subclass 546. Subject matter in which a plurality of means are provided for controlling the motor controllers, which means are positioned physically apart so as to constitute two stations or locations from which the operation of the controllers may be controlled. | |
548 | . Plural control stations: |
This subclass is indented under subclass 543. Subject matter in which a plurality of means are provided
for controlling the operation of a three-or-more-position
motor controller, which means are positioned physically
apart so as to constitute a plurality of stations or locations from
which the operation of the controllers may be controlled.
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549 | . Return to "off", "starting" or "neutral" positions: |
This subclass is indented under subclass 543. Subject matter in which means are provided for returning the controller, or which make it necessary that the controller be returned, substantially completely or fully to the "off", "starting", or "neutral" position after having been operated or started from such positions in a previous operation before it can become effective in controlling a subsequent motor operation. | |
550 | .. Power-operated controllers: |
This subclass is indented under subclass 549. Subject matter in which motive power means are provided
for operating the three-or-more-position
controller through part or all of its path of travel.
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551 | . Knee- or foot-operated controllers: |
This subclass is indented under subclass 543. Subject matter in which means are provided for operating
the three-or-more-position controllers
by knee or by foot of the operator.
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552 | . Power-actuated controllers: |
This subclass is indented under subclass 543. Subject matter in which motive power means are provided
for operating the three-or-more-position
motor controller through all or part of its path of travel.
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553 | .. Separately actuated controller contacts: |
This subclass is indented under subclass 552. Subject matter in which the three-or-more-position controller is provided with two or more sets or pairs of electrical contacts with separate or individual actuators for each set or pair of contacts. | |
554 | ... Electromagnetic actuated: |
This subclass is indented under subclass 553. Subject matter in which one or more of the actuating means
for the sets or pairs of contacts are electromagnets (including
electric motors).
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555 | .. Electromagnetic actuated: |
This subclass is indented under subclass 552. Subject matter in which one or more of the actuators are
electromagnets (including electric motors).
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556 | ... Reciprocating or oscillating electromagnetic means: |
This subclass is indented under subclass 555. Subject matter in which the electromagnetic actuating means
comprise an electromagnetic means having a reciprocating or oscillating type
of motor for its operating or working member.
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557 | ... Intermittent or step-by-step operation: |
This subclass is indented under subclass 555. Subject matter in which the electromagnetic actuating means
is a motor having an intermittent or step-by-step
movement in a single direction of operation.
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558 | MISCELLANEOUS: |
This subclass is indented under the class definition. Subject matter not classifiable in any of the preceding subclasses. | |
FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
This subclass has no definition. | |
FOR 100 | SPACE-DISCHARGE-DEVICE COMMUTATED MOTOR: |
Foreign art collection in which space discharge
devices are connected in the armature or primary circuit of the
motor and are connected so as to effect the commutation of the motor.
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FOR 101 | SELF-COMMUTATED IMPULSE OR RELUCTANCE MOTORS: |
Foreign art collection in which a rotary electric motor, of the type in which the rotary element tends to assume a predetermined angular position when the motor is continuously energized, is provided with a commutator or circuit making and breaking means which is actuated by the motor to determine the instants of time at which the field producing winding or windings thereof are energized and de-energized relative to the angular position of the rotary element of the motor. | |
FOR 102 | MOTOR COMMUTATION CONTROL SYSTEMS: |
Foreign art collection in which means are provided
for facilitating or otherwise controlling commutation in commutator
motors.
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DIG2 | WINDSHIELD WIPER CONTROLS |
This subclass has no definition. | |