Class Definition for Class 74 - MACHINE ELEMENT OR MECHANISM

CLASS 74,	MACHINE ELEMENT OR MECHANISM
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SECTION I - CLASS DEFINITION

Mechanical combinations, contrivances, or devices constituting portions of machines, instruments and apparatus and consisting of two or more fixed and movable parts so combined that the motion of one compels a completely controlled or constrained motion of the other according to a law of operation inherent in and depending on the nature of the combination, and also the elemental parts of such machines not provided for in other machine element classes.

SECTION II - LINES WITH OTHER CLASSES AND WITHIN THIS CLASS

This class is intended as a generic class for mechanism and machine parts not otherwise classified. Other machine element classes subgeneric hereto are Class 384, Bearings; Class 464, Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts.

This class does not include machines and instruments or apparatus claimed as such, for which see the appropriate art classes. It does not include the special tools, instruments, and subcombinations peculiar to the special arts and provided for in the classification of the art classes.

SECTION III - REFERENCES TO OTHER CLASSES

SEE OR SEARCH CLASS:

70,	Locks, appropriate subclasses and particularly subclasses 174+ , for machine elements combined with locks wherein the element or its associated structure is modified solely to accommodate the lock, or where the device is modified for the reception of a locking device, whether or not claimed.
73,	Measuring and Testing, subclasses 488+ for a speed responsive device, per se.
92,	Expansible Chamber Devices, for the line between Class 74 and Class 92, see References to Other Classes of the class definition of Class 92 under SEARCH CLASS 74.
123,	Internal-Combustion Engines, subclasses 90.1+ and 188.1+, for valve operating mechanism.
173,	Tool Driving or Impacting, appropriate subclass for subject matter directed to driving or impacting a tool, when such subject matter includes combined features peculiar to tool driving, but which does not include features limiting the subject matter to a specific tool art, such as specific shape of the work contacting portion of the tool, related tools, or an opposed work support. See References to Other Classes of the Class 173 class definition for a statement of the line with Class 74.
187,	Elevator, Industrial Lift Truck, or Stationary Lift for Vehicle, appropriate subclasses.
188,	Brakes, appropriate subclasses and especially subclasses 105 through 108for brake operators.
192,	Clutches and Power-Stop Control, appropriate subclasses and especially subclasses 82+ , for clutch operators.
193,	Conveyors, Chutes, Skids, Guides, and Ways, appropriate subclasses.
198,	Conveyors: Power-Driven, appropriate subclasses.
242,	Winding, Tensioning, or Guiding, appropriate subclasses.
251,	Valves and Valve Actuation, subclasses 213+ for mechanical movement valve actuators.
267,	Spring Devices, appropriate subclasses.
279,	Chucks or Sockets, appropriate subclasses.
296,	Land Vehicles: Bodies and Tops, various subclasses for bodies and tops having movable components which may be actuated by mechanical means.
384,	Bearing, appropriate subclasses, and see (1) Note above.
464,	Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts, see (1) Note supra.
474,	Endless Belt Power Transmission Systems or Components, appropriate subclasses, and see particularly (5) Note under Lines With Other Classes in the class definition of Class 474.
475,	Planetary Gear Transmission Systems or Components, for planetary gear transmissions.
476,	Friction Gear Transmission Systems or Components, for friction gear transmissions.
477,	Interrelated Power Delivery Controls, Including Engine Control, for interrelated control between an engine and a transmission.

SUBCLASSES

[List of Patents for class 74 subclass 1]

MISCELLANEOUS:

This subclass is indented under the class definition. Miscellaneous mechanisms and not provided for below.

SEE OR SEARCH CLASS:

343,	Communications: Radio Wave Antennas, subclasses 754 and 757+ for directive antennas with scanning, sweeping or orienting of the beam, and including mechanisms for imparting spiral, rotary or rotary oscillatory motion to the antenna.

[List of Patents for class 74 subclass 1.5]

1.5

ESCAPEMENTS:

This subclass is indented under the class definition. Mechanisms comprising devices in which a unidirectionally biased power member, during at least a portion of its movement, imparts motion to an element which, as a result of such movement, alternately locks and releases the biased member for intermittent operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

526,	for lever stops.
565,	for controller checks.

SEE OR SEARCH CLASS:

185,	Motors: Spring, Weight, or Animal Powered, subclass 5 , for composite weight motors which are escapement controlled and see the search notes thereunder for related search fields.

[List of Patents for class 74 subclass 2]

AUTOMATIC OPERATION OR CONTROL (E.G., TRIPS):

This subclass is indented under the class definition. Mechanisms for releasing or tripping portions of machines to cause other portions to automatically operate due to the expenditure of the potential energy possessed by such parts.

SEE OR SEARCH THIS CLASS, SUBCLASS:

584+,

for automatically released yieldable pitmans and connecting rods.

SEE OR SEARCH CLASS:

40,	Card, Picture, or Sign Exhibiting, subclass 521 , for obstacle trip actuated changeable exhibitors.
56,	Harvesters, subclasses 401+ , for delivery trip shockers, and 432+, for tripped compressors and binders.
76,	Metal Tools and Implements, Making, subclass 15 for trip actuated file cutters, and subclasses 62 and 67 for trip actuated saw setters.
89,	Ordnance, subclasses 1.5+ , for trip devices associated with bomb, flare, and signal dropping devices.
111,	Planting, subclasses 14+ , for check wire tripped drillers.
114,	Ships, subclass 210 , for anchor trips.
124,	Mechanical Guns and Projectors, subclasses 31+ , for trigger mechanism.
166,	Wells, subclasses 237+ and the subclasses there noted for trip devices in wells.
169,	Fire Extinguishers, appropriate subclasses.
188,	Brakes, subclass 111 , for trip operated vehicle brakes.
200,	Electricity: Circuit Makers and Breakers, appropriate subclasses.
212,	Traversing Hoists, subclass 116 for cable load suspension trips.
246,	Railway Switches and Signals, subclasses 76 and 201+, for track trips, 171+, for derailment contact trips and 359+, for train energy actuated trips.
292,	Closure Fasteners, subclasses 332+ for trip actuated closure fasteners.
293,	Vehicle Fenders, subclasses 33 , 35 and 37, for trip actuated fenders.
399,	Electrophotography, subclasses 75+ for machine operations of an electrophotography device and subclasses 107+ for particular structure of the device, specifically subclasses 110+ for modular or displaceable components.

[List of Patents for class 74 subclass 3]

Speed controlled:

This subclass is indented under subclass 2. Mechanisms wherein the releasing or tripping is initiated by a speed responsive device.

SEE OR SEARCH CLASS:

73,	Measuring and Testing, subclasses 535+ for a speed sensor of the centrifugal weight type.
192,	Clutches and Power-Stop Control, subclass 140 for speed responsive limit stops and subclass 147 for speed response clutch releases combined with brakes.

[List of Patents for class 74 subclass 3.2]

3.2

Valve gear trips (e.g., steam engine "Corliss" type):

This subclass is indented under subclass 3. Mechanisms wherein a flow controlling valve is the released or tripped device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

2,	for other automatically-operated valve gear trips not speed responsive nor otherwise classifiable in subclasses below.

[List of Patents for class 74 subclass 3.5]

3.5

Retarded:

This subclass is indented under subclass 2. Mechanisms preset to cause the releasing or tripping at a particular time of day or at the termination of a particular time interval following the setting.

SEE OR SEARCH CLASS:

119,	Animal Husbandry, subclasses 51.14+ for feeding devices including timer controlled trips.
137,	Fluid Handling, subclasses 624.19 and 624.22 for valves including timer controlled trips.
185,	Motors: Spring, Weight, or Animal Powered, subclasses 27+ for a retarded trip releasing a weight motor and subclasses 37+ for a retarded trip releasing a spring motor.
200,	Electricity: Circuit Makers and Breakers, subclasses 39+ for an electrical circuit switch controlled by a retarded latch trip.
368,	Horology: Time Measuring Systems or Devices, subclasses 243+ for an horological device controlling the tripping of a sounding device, and in the definition of subclass 152 see the "Note".

3.52	Plural, sequential, trip actuations:
	This subclass is indented under subclass 3.5. Mechanism preset to cause sequential tripping of a single part or tripping of several parts in sequence.

3.54	Clock train:
	This subclass is indented under subclass 3.5. Mechanism including a clock, a clock train or similar gearing.

3.56	Winding knob trip (e.g., alarm mechanism):
	This subclass is indented under subclass 3.54. Mechanism wherein the trip includes the winding knob of a spring powered clock train or the winding knob of a spring powered operator (e.g., alarm mechanism) under the control of the clock train.

4	Hit and miss:
	This subclass is indented under subclass 2. Mechanism wherein the releasing or tripping is intermittent and the mechanism is intended to insure a uniform speed output.

[List of Patents for class 74 subclass 5]

GYROSCOPES:

This subclass is indented under the class definition. Devices defined in (1) Note, below and known as gyroscopes.

(1) Note. A conventional gyroscope is a mechanism comprising a rotor journaled to spin about one axis, the journals of the rotor being mounted in an inner gimbal or ring, the inner gimbal being journaled for oscillation in an outer gimbal which in turn is journaled for oscillation relative to a support. The outer gimbal or ring is mounted so as to pivot about an axis in its own plane determined by the support. Hence the outer gimbal possesses one degree of rotational freedom and its axis possesses none. The inner gimbal is mounted in the outer gimbal so as to pivot about an axis in its own plane which axis is always normal to the pivotal axis of the outer gimbal. Hence the inner gimbal possesses two degrees of rotational freedom and its axis possesses one. The rotor is journaled to spin about an axis which is always normal to the axis of the inner gimbal. Hence the rotor possesses three degrees of rotational freedom and its axis possesses two. The center of gravity of the rotor is thus in a fixed position. The rotor simultaneously spins about one axis and is capable of oscillating about the two other axes, and thus except for its inherent resistance due to rotor spin, it is free to turn in any direction about the fixed point.

Some gyroscopes have mechanical equivalents substituted for one or more of the elements, e.g., the spinning rotor may be suspended in a fluid, instead of being pivotally mounted in gimbals. In some special cases, the outer gimbal (or its equivalent) may be omitted so that the rotor has only two degrees of freedom. In other cases, the center of gravity of the rotor may be offset from the axis of oscillation, and thus the center of gravity of the rotor and the center of suspension of the rotor may not coincide.

(2) Note. This is the generic locus for gyroscopes. Every rotating body has gyroscopic action, but such devices are not placed here unless at least one axis of oscillation is present.

(3) Note. For combinations of gyroscopes with other devices see indented subclass 5.22 and the notes thereto appended.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.22,

and the notes thereto and see (2) Note supra.

SEE OR SEARCH CLASS:

248,	Supports, subclass 182.1 for gimbals, per se.
310,	Electrical Generator or Motor Structure, subclass 261.1 for rotors, per se.
446,	Amusement Devices: Toys, subclasses 233+ for gyroscopic toys, including gyroscopic tops.

[List of Patents for class 74 subclass 5.1]

5.1

With caging or parking means:

This subclass is indented under subclass 5. Gyroscopes combined with mechanism to hold the rotor axis fixed, when the rotor is not spinning, or if spinning, when it is desired to take the gyroscope out of useful operation.

(1) Note. The rotor axis may be positively held with respect to the gyroscope support, or it may be heavily weighed to hold the rotor axis fixed with respect to the earth.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.44,

where the force of gravitation, acting upon a weight, and reacting against the rotor axis erects an operative gyroscope.

[List of Patents for class 74 subclass 5.12]

5.12

Rotor spin and cage release type:

This subclass is indented under subclass 5.1. Devices having a mechanism to impart spin to a rotor and a further means to release the holding means after the rotor is up to speed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.7,	for rotor drives.

5.14	And resetting means:
	This subclass is indented under subclass 5.1. Devices wherein further means is provided to adjust or vary the position held. This may be done by having the means which holds the rotor axis adjustable to vary the position held, or by having the first means restrain movement in one plane and a second means to position the rotor axis in that plane.

5.2	With gimbal lock preventing means:
	This subclass is indented under subclass 5. Gyroscopes wherein means is provided to prevent alignment of the rotor axis with a gimbal axis.

[List of Patents for class 74 subclass 5.22]

5.22

Combined:

This subclass is indented under subclass 5. Gyroscopes combined with structure other than the gyroscope, except means to control and/or drive the mechanism.

(1) Note. The large majority of patents found here are of the stabilizing type and recite the device stabilized by name only. Where structure of the device over and above that necessary to mount the device is claimed, or where a particular relationship to the device is claimed, the patents have been classified with the device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.4+,	for gyroscope control.
5.37,	for drives for plural gyroscopes.
5.7,	for drives for single gyroscopes.
64,	for inertia or centrifugally controlled rotary transmitters.

SEE OR SEARCH CLASS:

73,	Measuring and Testing, subclasses 504.2+ , for a gyroscope combined with a speed responsive device.
105,	Railway Rolling Stock, subclasses 141+ , for monorail type railway rolling stock combined with gyroscopes and subclasses 150+, for suspended monorail type rolling stock combined with gyroscopes.
114,	Ships, subclasses 21.1 and 24, for gyroscopically controlled torpedo steering mechanism; subclass 122, for gyroscopic anti-rolling stabilizers combined with ships; and subclass 144, for gyroscopic controlled steering.
244,	Aeronautics and Astronautics, subclass 79 , for gyroscope actuated automatic aircraft control.
396,	Photography, subclass 13 for an aerial camera which is gyroscopically stabilized.
446,	Amusement Devices: Toys, subclasses 233+ for gyroscopic toys, and subclass 462 for wheeled toys having inertia-operated driving means.
475,	Planetary Gear Transmission Systems or Components, for gyroscopically controlled planetary gearing.

5.34	Multiple gyroscopes:
	This subclass is indented under subclass 5. Gyroscopes comprising two or more gyroscopes.

[List of Patents for class 74 subclass 5.37]

5.37

With rotor drives:

This subclass is indented under subclass 5.34. Devices having means for driving the gyroscopes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.7,	for drives for single gyroscopes.

5.4	Gyroscope control:
	This subclass is indented under subclass 5. Gyroscopes having means to apply one or more forces to the rotor axis to control the movement of the rotor axis about its center of suspension.

[List of Patents for class 74 subclass 5.41]

5.41

Erecting:

This subclass is indented under subclass 5.4. Devices wherein one or more forces act to move the rotor axis to a given position, usually to a vertical position.

(1) Note. Where the force of the surrounding atmosphere against a plurality of vanes is used for erection, the patent will be found in this subclass.

[List of Patents for class 74 subclass 5.42]

5.42

By plural diverse forces:

This subclass is indented under subclass 5.41. Devices where at least two diverse forces are used for erection.

(1) Note. Pendulous gyroscopes having an additional means to erect them are here when both means are claimed, an cross-referenced to the subclasses indented hereunder for the separate means.

5.43	By jet:
	This subclass is indented under subclass 5.41. Devices wherein the force of a fluid jet is used for erection.

[List of Patents for class 74 subclass 5.44]

5.44

By weight:

This subclass is indented under subclass 5.41. Devices wherein the gravitational force upon a weight is utilized for erection.

(1) Note. Pendulous gyroscopes with no other erecting controls are here.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.1,	for weight actuated parking or caging devices.
5.42,	for pendulous gyroscopes having an additional force utilized for erection.

[List of Patents for class 74 subclass 5.45]

5.45

By friction:

This subclass is indented under subclass 5.41. Devices wherein the application of a frictional force is utilized for erection.

(1) Note. Where the force of the surrounding atmosphere against a plurality of vanes is used for erection, the patents will be found in subclass 5.41.

5.46	By magnetic field:
	This subclass is indented under subclass 5.41. Devices wherein the force of a magnetic field is utilized for erection.

5.47	By motor torque:
	This subclass is indented under subclass 5.41. Devices where the torque of a prime mover constitutes the force used for erection.

5.5	Damping:
	This subclass is indented under subclass 5.4. Devices having means to dampen the oscillation of the gimbals, or of the rotor axis.

[List of Patents for class 74 subclass 5.6]

5.6

With pick off:

This subclass is indented under subclass 5. Gyroscopes having a means to sense the relative position or change of position of the rotor axis, and/or its gimbals.

(1) Note. The sensing means normally actuates or controls a signal, indicator or a control for another device.

[List of Patents for class 74 subclass 5.7]

5.7

With rotor drive:

This subclass is indented under subclass 5. Gyroscopes having means to drive the rotor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.12,

for rotor spin mechanism combined with cage release mechanisms.

5.8	Vertical gyroscopes:
	This subclass is indented under subclass 5. Gyroscopes peculiarly constructed for operating with the spin axis in a vertical position only.

5.9	Horizontal gyroscopes:
	This subclass is indented under subclass 5. Gyroscopes peculiarly constructed for operating with the spin axis in a horizontal position only.

[List of Patents for class 74 subclass 5.95]

5.95

Flywheel structure:

This subclass is indented under subclass 5. Subject matter including a motion-smoothing component generally made up of a massive disk-like member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

572.2,

for motion smoothing flywheel.

[List of Patents for class 74 subclass 6]

ENGINE STARTERS:

This subclass is indented under the class definition. Mechanical movements and/or gearing, combined as a unit, for initiating the starting of a machine, in which operative engagement with the machine to be started is initiated and controlled and power is applied to the gearing by some conventional means.

(1) Note. See the Index, under "Starter" and "Starting".

SEE OR SEARCH THIS CLASS, SUBCLASS:

139+,

for intermittent unidirectional motion type engine starters.

SEE OR SEARCH CLASS:

123,	Internal-Combustion Engines, sub- classes 179.1+ for other starting devices for internal combustion engines.
185,	Motors: Spring, Weight, or Animal Powered, subclasses 6+ , 10+, 32, and 39, for structure for winding motors of the weight and spring types.
290,	Prime-Mover Dynamo Plants, subclasses 10 , 22-38, 46-68, for dynamo-electric starter-generator structure.

7	Automatic:
	This subclass is indented under subclass 6. Starters in which the operative engagement with the machine to be started is automatic.

8	Radial meshing:
	This subclass is indented under subclass 6. Starters in which meshing of the gears with the machine to be started takes place in a radial direction.

9	Cam operated:
	This subclass is indented under subclass 6. Starters in which meshing of the gearing with the machine to be started is accomplished by a cam device other than a screw.

[List of Patents for class 74 subclass 10]

SHAFT OPERATORS (RADIO TUNER TYPE):

This subclass is indented under the class definition. Assemblies particularly adapted for mechanically rotating one or more shafts of electronic tuning devices into desired angular positions.

(1) Note. The art is directed to the positioning of radio tuning shafts having indicating means and/or variable condensers associated therewith for adjustment.

(2) Note. Electrically actuated dial operators are not here, even though claimed in combination with mechanical operators for these subclasses. They will be found in Class 192, Clutches and Power-Stop Control, subclasses 138+, and in Class 318, Electricity: Motive Power Systems, appropriate subclasses (including particularly subclasses 560+, which has the follow-up type motor controls). The line between these two classes is stated in the class definition of Class 318, Lines With Other Classes, Load Device Driven by the Motor (Including Power, Motion, Force, or Torque Transmitting Devices, Motor Systems and Power, Motion, Force, or Torque Transmitting Devices, and under the reference to Class 192 under "SEARCH CLASSES" at the end of the class (318) definition.

(3) Note. These subclasses will take the recitation of a condenser, inductance, transformer or a radio tuner by name only when claimed in combination with shaft positioning means. Whenever significant structure of the condenser, inductance, transformer, or tuner are recited, the devices will be classified in Class 455, Telecommunications, particularly sub 150.1+ where radio tuner structure is recited. Class 334, Tuners, appropriate subclasses for radio tuner structure, per se, or Class 336, Inductor Devices, appropriate subclasses where variable transformer or inductance structure is recited. Where the operator is merely a screw gearing and the tuner is recited by name only, the search should be continued in this class (74), subclass 424.71-424.96.

(4) Note. These subclasses will take the shaft positioning means with respect to its support in combination with indicating means to indicate the position, adjustment or movement of the shaft. And see the Search Note to the Signals and Indicators class, below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

20,	through 110 inclusive, for nonintermittent type mechanical movements.
111+,	for intermittent grip type mechanical movements.
424.71	through 424.96, for screw gearing, and see (3) Note supra.
469+,	for control lever and linkage systems.
526,	for stops for levers.
553,	for knob or dial operators.
640,	for gearing.
813+,	for assemblies of general utility, including turret mechanisms for metal working machines having means to index rotary members, and see the Notes thereto.

SEE OR SEARCH CLASS:

116,	Signals and Indicators, 200+, provides for indicators attached to, or associated with some movable device to indicate the movement, adjustment or position of such device. Indented subclasses 241+ , provides for radio tuner position indicators. Class 116 will take shaft positioning means with respect to its support (even though in the form of a mechanical movement) in combination with the indicating means when only the part of the shaft positioning means with respect to its support necessary to operate the indicator is claimed, i.e., where no structure for positioning the shaft is recited which does not operate the position indicator.
192,	Clutches and Power-Stop Control, subclasses 138+ , for power-stop limit controls and see (2) Note, supra.
235,	Registers, appropriate subclasses for related operating devices for registers and particularly subclasses 12+ , for those which are key board operated.
318,	Electricity: Motive Power Systems, appropriate subclasses for controlled electric motor operators, particularly subclasses 560+ , for servo controlled operators and see (2) Note, supra.
336,	Inductor Devices, appropriate subclasses for variable transformer or inductance structure combined with shaft positioning means, and see (3) Note, above.
361,	Electricity: Electrical Systems and Devices, subclasses 271+ for specific variable condenser structure.
403,	Joints and Connections, subclasses 230+ for joints between the end of a shaft and a plate-like member.
455,	Telecommunications, subclasses 150.1+ for radio receivers with tuners, see (3) Note.

10.1	Preselected position:
	This subclass is indented under subclass 10. Devices having interengaging means by which the rotation of the shaft may be halted at a plurality of predetermined angular positions.

10.15

Step by step:

This subclass is indented under subclass 10.1. Devices having means interposed between a single initiator and the shaft for rotating the shaft through a series of successive predetermined positions, the rotation of the shaft being halted at each such successive position.

SEE OR SEARCH THIS CLASS, SUBCLASS:

126+,

for mechanical movements for changing reciprocating motion to intermittent unidirectional motion, and particularly subclass 142 for lever actuators.

[List of Patents for class 74 subclass 10.2]

10.2

Rotatable stop and projectable abutment:

This subclass is indented under subclass 10.1. Devices having a rotatable stop element for halting shaft movement and a movable abutment for the stop element, and means for moving the abutment into a position in which the stop element may contact the abutment.

(1) Note. Electric motor control of the rotatable stop elements and/or the movable abutments will be found in Class 192, Clutches and Power-Stop Control, subclasses 138+, and particularly subclass 142; and the appropriate subclass of Class 318, Electricity: Motive Power Systems, subclasses 560+, for position servo control systems particularly subclass 614, friction braking at balance; see (2) Note to this class (74), subclass 10.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, subclasses 138+ , for power-stop limit controls and see (1) Note.
318,	Electricity: Motive Power Systems, appropriate subclasses for electric motor control, and particularly subclasses 560+ , for position servo control type particularly subclass 614, for friction braking at balance; and see (1) Note.

10.22

Digital dial type:

This subclass is indented under subclass 10.1. Devices in which the shaft operator is a dial and is provided with a series of single finger-receiving openings.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclass 11 , for dial operated switches.
379,	Telephonic Communications, subclass 363 for a telephone dial mechanism.

10.27

Plural operator:

This subclass is indented under subclass 10.1. Devices having more than one operator for controlling the shaft.

SEE OR SEARCH THIS CLASS, SUBCLASS:

10.54,	for separate operators for each of a plurality of speed drives of the nonselective type dial operators.
479,	for plural input single output lever and linkage systems.
625+,	for alternate manual and power operators.
665+,	for plural input single output gearing.

SEE OR SEARCH CLASS:

235,	Registers, appropriate subclasses for related operating devices for registers and particularly subclasses 12+ , for those which are keyboard operated.
475,	Planetary Gear Transmission Systems or Components, subclasses 1+ for plural power sources for driving planetary gearing.

10.29

Cam and follower:

This subclass is indented under subclass 10.27. Devices wherein a cam and follower is interposed between the operator and the shaft.

SEE OR SEARCH THIS CLASS, SUBCLASS:

10.6,	for nonselective cam and follower type dial operators.
567+,	for cam and/or follower structure, per se.

10.31

Adjustable cam:

This subclass is indented under subclass 10.29. Devices wherein the cam is adjustable.

SEE OR SEARCH THIS CLASS, SUBCLASS:

568,	for adjustable cams, per se.

10.33	Sliding operator:
	This subclass is indented under subclass 10.31. Devices where the cam is carried by a sliding operator.

10.35

Adjustable follower:

This subclass is indented under subclass 10.29. Devices wherein the follower is adjustable.

SEE OR SEARCH THIS CLASS, SUBCLASS:

569,	for followers, per se.

10.37	Sliding operator:
	This subclass is indented under subclass 10.35. Devices where the cam is carried by a sliding operator.

10.39

Rack and pinion:

This subclass is indented under subclass 10.27. Devices wherein a rack and pinion gearing is interposed between at least one of the operators and the shaft.

SEE OR SEARCH THIS CLASS, SUBCLASS:

422,	for rack and pinion gearing, per se.

10.41

With detent or clicker:

This subclass is indented under subclass 10.1. Devices in which a detent or click device tends to hold the shaft in the predetermined positions.

SEE OR SEARCH THIS CLASS, SUBCLASS:

527+,

for detents, per se.

10.45

Plural shafts:

This subclass is indented under subclass 10. Devices in which a plurality of shafts are rotated by a single operator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

471+,	for single input plural output lever and linkage systems.
665+,	for single input plural output gearing.

SEE OR SEARCH CLASS:

475,	Planetary Gear Transmission Systems or Components, for plural outputs from planetary gearing.

[List of Patents for class 74 subclass 10.5]

10.5

Plural speed:

This subclass is indented under subclass 10. Devices in which the shaft may be rotated at a plurality of speeds.

(1) Note. In most cases, a fast speed is used for coarse rotational adjustment and a slow speed for fine adjustment.

SEE OR SEARCH THIS CLASS, SUBCLASS:

325+,

for interchangeably locked nonplanetary gearing.

10.52

Planetary:

This subclass is indented under subclass 10.5. Devices wherein a planetary gearing is interposed between the operator and the shaft.

SEE OR SEARCH CLASS:

475,	Planetary Gear Transmission Systems or Components, for planetary gearing, per se.

10.54

Separate operators:

This subclass is indented under subclass 10.5. Devices having separate operators for each speed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

10.52,	for separate operators for planetary gearing.
665+,	for plural input single output nonplanetary type gearing.

[List of Patents for class 74 subclass 10.6]

10.6

Cam and follower:

This subclass is indented under subclass 10. Devices wherein a cam and follower is interposed between the operator and the shaft.

SEE OR SEARCH THIS CLASS, SUBCLASS:

10.29+,	for selective type cam and follower dial operators.
567+,	for cam and/or follower structure, per se.

[List of Patents for class 74 subclass 10.7]

10.7

Tensioned flexible operator:

This subclass is indented under subclass 10. Devices wherein the operator includes a flexible strand operating in tension only, usually in the nature of a belt and pulley drive, although the strand may be anchored to one of the pulleys.

SEE OR SEARCH CLASS:

474,	Endless Belt Power Transmission Systems or Components, appropriate subclasses for a belt and pulley drive in a power transmission.

[List of Patents for class 74 subclass 10.8]

10.8

Gear drive:

This subclass is indented under subclass 10. Devices wherein gearing is interposed between the operator and the shaft.

SEE OR SEARCH THIS CLASS, SUBCLASS:

640+,

for gearing, per se.

10.85

Worm or screw:

This subclass is indented under subclass 10.8. Devices where the gearing is of the worm or screw type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

424.71	through 424.96, for screw type gearing, per se.
425,	for worm type gearing, per se.

[List of Patents for class 74 subclass 10.9]

10.9

Lever and linkage drive:

This subclass is indented under subclass 10. Devices wherein a lever and linkage system is interposed between the operator and the shaft.

SEE OR SEARCH THIS CLASS, SUBCLASS:

469+,

for lever and linkage systems, per se.

[List of Patents for class 74 subclass 11]

POWER TAKE-OFF:

This subclass is indented under the class definition. Devices comprising a subordinate power transmitting assembly, additional to and driven by one of the elements of a main power line, or by the prime mover therefor.

(1) Note. Power take offs from a prime mover for this class (74) are here unless they are made from a shaft extension of a prime mover, in which case, see this class, subclass 15.63. Take offs for engine accessory drives will be found in Class 123, Internal-Combustion Engines, subclass 198; take offs involving vehicle structure are found in Class 180, Motor Vehicles, subclasses 53.1+; and take offs for vehicle driven pumps are in Class 417, Pumps, subclasses 231+.

SEE OR SEARCH THIS CLASS, SUBCLASS:

15.63,	and see (1) Note, supra.
16,	plural driven devices actuated from a power table or stand.
640+,	for gearing, per se.
665+,	for plural driven devices of general application.

SEE OR SEARCH CLASS:

123,	Internal-Combustion Engines, subclass 198 , for take offs for engine accessories (and see (1) Note, supra).
172,	Earth Working, subclasses 35+ for an earth working implement comprising an earth working tool driven by a power take-off, and subclasses 492+ and the subclasses there noted for an earth working implement adjusted by a power take-off.
180,	Motor Vehicles, subclasses 53.1+ , for power take offs involving vehicle structure (and see (1) Note, supra).
408,	Cutting by Use of Rotating Axially Moving Tool, subclasses 124+ , for drilling machines in which the feeding movement between tool and work is effected by means actuated by the rotation of the tool spindle.
475,	Planetary Gear Transmission Systems or Components, for gearing driving plural load devices.

12	Speedometer:
	This subclass is indented under subclass 11. Assemblies, in which the auxiliary driven element is a speedometer.

[List of Patents for class 74 subclass 13]

Wheel take-off:

This subclass is indented under subclass 11. Mechanisms, in which the power is taken directly from or transmitted directly to, the wheels of a vehicle.

SEE OR SEARCH CLASS:

30,	Cutlery, subclasses 166.3+ and 388+, for portable power saws.
180,	Motor Vehicles, subclasses 53.1+ , for power take-offs combined with vehicle structure.
185,	Motors: Spring, Weight, or Animal Powered, subclasses 15+ , for animal powered motors.

14	Wheel bed type:
	This subclass is indented under subclass 13. Mechanisms, in which the mechanisms are provided with power transmitting or receiving elements which contact with and support at least one wheel of the vehicle.

Supported pulley:

This subclass is indented under subclass 13. Mechanisms, in which power is delivered from or to a vehicle wheel through a device attached thereto, the wheel being out of peripheral contact with any other object.

SEE OR SEARCH CLASS:

474,	Endless Belt Power Transmission Systems or Components, appropriate subclasses for pulley structure and for pulleys used in endless belt power transmissions.

[List of Patents for class 74 subclass 15.2]

15.2

Plural take-off shafts:

This subclass is indented under subclass 11. Devices having a plurality of power take-off shafts.

SEE OR SEARCH THIS CLASS, SUBCLASS:

16,	for plural driven devices actuated from a power table or stand.
665+,	for plural driven devices of general application.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, subclasses 48.1+ for plural clutch-assemblages, and especially subclasses 48.8+ for such assemblages associated with three or more shafts, one of which may be a power take-off shaft.

[List of Patents for class 74 subclass 15.4]

15.4

With independent change speed gearing:

This subclass is indented under subclass 11. Devices in which independent gearing means are provided to effect a change in output speed of, and/or a forward or reverse drive for, the take-off.

SEE OR SEARCH THIS CLASS, SUBCLASS:

325+,

for nonplanetary change speed gearing.

SEE OR SEARCH CLASS:

475,	Planetary Gear Transmission Systems or Components, for planetary change speed gearing.

[List of Patents for class 74 subclass 15.6]

15.6

From shaft extension:

This subclass is indented under subclass 11. Devices in which either a prime mover shaft, a main power line shaft, or an auxiliary driven shaft is extended to constitute a power take-off.

(1) Note. The so-called "power take-off shaft" to be found on some type of tractors is considered to be an auxiliary driven shaft.

SEE OR SEARCH CLASS:

403,	Joints and Connections, appropriate subclasses for shaft couplings of a nonflexible type.
464,	Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts, appropriate subclasses for a flexible coupling between a torque transmitting shaft and a driven member.

15.63

Prime mover shaft, e.g., crank shaft:

This subclass is indented under subclass 15.6. Devices in which a shaft in a prime mover for the power line (e.g., a crank shaft or a cam shaft) is extended to constitute a take-off.

SEE OR SEARCH THIS CLASS, SUBCLASS:

11,	for other take-offs from prime movers, and see (1) Note to that definition for the line between these two subclasses.

SEE OR SEARCH CLASS:

123,	Internal-Combustion Engines, subclasses 185.1+ , for engine crankshaft extensions employed for engine starting and subclass 198 for engine accessories driven by a shaft extension.
417,	Pumps, subclasses 231+ , for vehicle engine driven power take-offs for pumps.

15.66	Change speed transmission shaft:
	This subclass is indented under subclass 15.6. Devices in which a shaft in a change speed transmission is extended to constitute the take-off.

15.69

Vehicle propeller shaft:

This subclass is indented under subclass 15.6. Devices in which the propeller shaft of a vehicle is extended to constitute a take-off.

(1) Note. The power take-off is normally at the differential.

[List of Patents for class 74 subclass 15.8]

15.8

Intermediate ends of power transmitting line:

This subclass is indented under subclass 11. Devices which are driven by a connection in the main power transmitting line and intermediate its driving and driven ends.

(1) Note. A power transmitting line is a power path comprising, e.g., one or more clutches and/or gearing and/or brakes, having a prime mover at one end and a load at the other.

15.82	Vehicle propulsion transmitting line:
	This subclass is indented under subclass 15.8. Devices in which the power transmitting line is used for vehicle propulsion.

15.84	Between prime mover shaft and transmission:
	This subclass is indented under subclass 15.82. Devices in which the connection to the transmitting line is located between the prime mover output shaft and the transmission.

15.86	Drive from transmission gear:
	This subclass is indented under subclass 15.82. Devices in which the driving connection comprises a gear in mesh with a second gear, which second gear is part of the transmission gearing.

15.88

Between transmission and propeller shaft:

This subclass is indented under subclass 15.82. Devices in which the driving connection to the transmitting line is located between the driven shaft of the transmission and the propeller shaft.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, subclasses 48.1+ for plural clutch-assemblages, and especially subclasses 48.8+ for such assemblages associated with three or more shafts, one of which may be a power take-off shaft.

[List of Patents for class 74 subclass 16]

POWER TABLES AND STANDS:

This subclass is indented under the class definition. Portable assemblies designed to drive one or more auxiliary attachments.

(2) Note. For stands, per se, see the search notes below.

SEE OR SEARCH CLASS:

15,	Brushing, Scrubbing, and General Cleaning, subclasses 49.1+ for a machine having a brush as its sole type of cleaning instrument, and that is especially adapted for cleaning a floor, wall, or ceiling.
108,	Horizontally Supported Planar Surfaces, subclasses 20+ for a power driven horizontally supported surface of general utility.
248,	Supports, subclasses 637+ for machinery supports.
310,	Electrical Generator or Motor Structure, subclasses 47 and 50 for portable or hand held electric motors.
312,	Supports: Cabinet Structure, subclasses 21+ , for stands per se.
366,	Agitating, appropriate subclasses, particularly subclasses 197+ and 208+.
433,	Dentistry, subclasses 103+ for dental engines.

[List of Patents for class 74 subclass 17]

WASHER AND WRINGER:

This subclass is indented under the class definition. Assemblies particularly adapted for the operation of a washing and wringing machine.

SEE OR SEARCH THIS CLASS, SUBCLASS:

378+,	for interchangeably locked, single clutch shaft, single forward and reverse gearing.
385+,	for interchangeably locked, pivotally supported bevel gearing.

SEE OR SEARCH CLASS:

68,	Textiles: Fluid Treating Apparatus, subclasses 21+ , for textile fluid treating apparatus combined with fluid extraction of the squeezing type.

[List of Patents for class 74 subclass 17.5]

17.5

FULL STROKE MECHANISM:

This subclass is indented under the class definition. Devices for compelling a reciprocating part to be actuated to its full extent before it can be returned.

SEE OR SEARCH CLASS:

81,	Tools, subclass 313 for pliers and plural-handle wrenches with jaw-movement completion means.

[List of Patents for class 74 subclass 17.8]

17.8

MOTION TRANSFER THROUGH IMPERFORATE FLEXIBLE SEAL:

This subclass is indented under the class definition. Devices having an imperforate member functioning as a seal for an aperture in a partition or for a passageway, the member being flexible at least in part to permit movement with respect to the partition and being fixed to the partition or walls of the passageway, there being means contacting one side of the seal member to receive or transfer motion from or to the member, and there being relative motion between the seal member and the means at the point of contact.

(1) Note. The seal member may include bearing surfaces or the like to minimize the effect of the relative motion on the seal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

18+,	for flexible seals pierced by a rod, which seal is fixed to its support and to the rod.

SEE OR SEARCH CLASS:

313,	Electric Lamp and Discharge Devices, subclass 148 for electric lamp and discharge devices provided with means to transmit motion to an electrode through a movable envelope wall portion.

[List of Patents for class 74 subclass 18]

FLEXIBLE SEALING DIAPHRAGM ATTACHED TO MOVING ROD AND TO CASING:

This subclass is indented under the class definition. Devices in which motion is transmitted through a sealed casing by means of a flexible sealing material attached to the casing and to a moving rod which passes through the sealing material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

566,	for slot closers for levers.

SEE OR SEARCH CLASS:

92,	Expansible Chamber Devices, subclasses 34+ for a bellows type expansible chamber device and subclasses 96+ for a diaphragm type expansible chamber device.
180,	Motor Vehicles, subclass 90.6 for guards for pedals and gear shift levers.
277,	Seal for a Joint or Juncture, for a generic sealing means or process, subclasses 634+ for a static contact seal for other than an internal combustion engine, or a pipe, conduit, or cable that is a flexible sleeve, boot, or diaphragm.
313,	Electric Lamp and Discharge Devices, subclasses 146+ , for electronic tubes and electric lamps having a sealed envelope and provided with means for transmitting force from the outside of the envelope to the interior of the envelope for the purpose of moving an electrode within the envelope.
403,	Joints and Connections, appropriate subclasses for a mere connection comprising a flexible diaphragm or bellows joining a plate or wall and a rod passing through an aperture therein.
464,	Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts, subclasses 52+ for a flexible shaft combined with a housing; and subclasses 170+ for a housing for a rotary shaft.

18.1	Pivoting or nutating rod:
	This subclass is indented under subclass 18. Devices in which the rod pivots or nutates.

[List of Patents for class 74 subclass 18.2]

18.2

Longitudinally reciprocating rod:

This subclass is indented under subclass 18. Devices in which the rod reciprocates longitudinally. Mechanical Movements. Devices under the class definition other than gearing for imparting motion to one body from the motion of another body, wherein the two motions, or some intermediate motion, are of different form, type or degree.

SEE OR SEARCH THIS CLASS, SUBCLASS:

469+,	for control lever and linkage systems.
640+,	for gearing.
828+,	for mechanical movement having "on the fly" adjustment of the driven member.

SEE OR SEARCH CLASS:

226,	Advancing Material of Indeterminate Length, appropriate subclasses for methods of, and apparatus for, feeding material without utilizing the leading or trailing ends to effect movement of the material.

20	Oscillating to reciprocating and alternating rotary:
	Mechanical Movements for converting oscillating motion to the compound motion of reciprocation and alternating rotary motion.

21	Oscillating to reciprocating and intermittent rotary:
	Mechanical Movements for converting oscillating motion to the compound motion of reciprocation and intermittent rotary motion.

[List of Patents for class 74 subclass 22]

Rotary to reciprocating and rotary:

Mechanical Movements for converting rotary motion to the combined motion of reciprocation and rotary motion.

SEE OR SEARCH CLASS:

241,	Solid Material Comminution or Disintegration, subclass 205 , for apparatus using this mechanical movement.
242,	Winding, Tensioning, or Guiding, subclasses 241 and 242 for drive mechanisms in fishing reels that convert rotary input into both reciprocation and rotation of an output.
414,	Material or Article Handling, subclasses 431+ for apparatus for advancing and rotating an elongated article not intended to remain associated with the apparatus (e.g., a tube to be worked on) by means adapted to engage the article between its ends.

23	Rotary to reciprocating and alternating rotary:
	Mechanical Movements for converting rotary motion to the compound motion of reciprocation and alternating rotary motion.

24	Rotary to reciprocating and intermittent rotary:
	Mechanical Movements for converting rotary motion to the compound motion of reciprocation and intermittent rotary motion.

[List of Patents for class 74 subclass 25]

Rotary to or from reciprocating or oscillating:

Mechanical Movements for converting rotary motion to or from reciprocating or oscillating motion.

SEE OR SEARCH CLASS:

30,	Cutlery, subclasses 215+ , for rotary power driven multiple shearing position shears.
241,	Solid Material Comminution or Disintegration, subclasses 262+ , for apparatus using this mechanical movement.
242,	Winding, Tensioning, or Guiding, subclasses 241+ , 271+, 447.1+, and 476.7+ for drive mechanisms that convert a rotary input motion into reciprocation or oscillation of a line guide.
433,	Dentistry, subclasses 118+ for reciprocating or oscillating dental instruments receiving rotary power.

[List of Patents for class 74 subclass 26]

Head motions:

This subclass is indented under subclass 25. Mechanisms, especially adapted for shaking screens in which the screen is not claimed as a positive element and excepting those driven by unbalanced weights.

SEE OR SEARCH THIS CLASS, SUBCLASS:

61,	for screens driven by unbalanced weights.

SEE OR SEARCH CLASS:

198,	Conveyors: Power-Driven, subclasses 750.1+ , for reciprocating conveyors using this mechanical movement.
209,	Classifying, Separating, and Assorting Solids, for driving mechanisms in combination with the screen.

[List of Patents for class 74 subclass 27]

Reciprocating carriage motions:

This subclass is indented under subclass 25. Mechanisms for converting rotary motion to or from reciprocating or oscillating motion of a carriage in which the driven member is driven by different types of mechanism during different parts of its stroke.

SEE OR SEARCH CLASS:

101,	Printing, subclasses 292+ , for web type presses and subclasses 316+, for other type presses having reciprocating beds for bed and platen machines.

[List of Patents for class 74 subclass 28]

Phonograph type:

This subclass is indented under subclass 27. Mechanisms, especially adapted for moving the tone arm of a phonograph across the record.

SEE OR SEARCH CLASS:

369,	Dynamic Information Storage or Retrieval, subclasses 215.1 through 230for such subject matter combined with tone arm structure.
720,	Dynamic Optical Information Storage or Retrieval, subclasses 659 through 670for power driven transducer assembly in a dynamic optical information storage or retrieval device.

29	Rack and pinion type:
	This subclass is indented under subclass 25. Mechanisms, in which the mechanism involved is a rack and pinion and cannot be classified in any of the subclasses under this subclass.

30	Shifting rack:
	This subclass is indented under subclass 29. Mechanisms, in which the rack moves in and out of engagement with the pinion.

31	Shiftable pinion:
	This subclass is indented under subclass 29. Mechanisms, in which the pinion moves in and out of engagement with the rack.

32	Segmental pinion:
	This subclass is indented under subclass 29. Mechanisms, in which the teeth on the pinion cover less than 360 degrees of the circumference of the pinion.

33	Alternately rotated pinion:
	This subclass is indented under subclass 29. Mechanisms, in which the pinion is always in mesh with the rack but its direction of rotation is alternated.

34	Clutchable gears:
	This subclass is indented under subclass 29. Mechanisms, in which the pinion or pinions are constantly in mesh with the rack but are clutched and declutched to the shaft by which they are carried.

35	Bevel:
	This subclass is indented under subclass 34. Mechanisms, in which the pinion or pinions are constantly in mesh with the rack but are clutched and declutched to the shaft by which they are carried, the pinions being of the bevel type.

36	Overcoming dead center:
	This subclass is indented under subclass 25. Mechanisms, in which the mechanisms involved either prevents the device from stopping on dead center or has some auxiliary mechanism for throwing the device off of dead center.

37	Belt or chain carried member:
	This subclass is indented under subclass 25. Mechanisms, which change the motion by means of a chain or belt.

38	Crank, lever, toggle, and slide:
	This subclass is indented under subclass 25. Mechanisms, including a crank, lever, toggle, and slide.

39	Crank, lazy-tong, and slide:
	This subclass is indented under subclass 25. Mechanisms, including a crank, lazy-tong, and slide.

[List of Patents for class 74 subclass 40]

Crank, pitman, lever, and slide:

This subclass is indented under subclass 25. Mechanisms, including a crank, pitman, lever, and slide.

SEE OR SEARCH CLASS:

123,	Internal-Combustion Engines, subclass 78 , for variable clearance, four cycle engines.

41	Pump jack type:
	This subclass is indented under subclass 40. Mechanisms, including a crank, pitman, lever and slide of the pump jack type.

[List of Patents for class 74 subclass 42]

Crank, pitman, and lever:

This subclass is indented under subclass 25. Mechanisms, including a crank, pitman, and lever.

SEE OR SEARCH CLASS:

30,	Cutlery, subclass 217 , for multiple shearing position shears using this mechanical movement.

43	Multiple levers:
	This subclass is indented under subclass 42. Mechanisms, including a crank, pitman, and a plurality of levers.

44	Crank, pitman, and slide:
	This subclass is indented under subclass 25. Mechanisms, including a crank, pitman, and slide.

[List of Patents for class 74 subclass 45]

Crank, lever, and slide:

This subclass is indented under subclass 25. Mechanisms, including a crank, lever, and slide.

SEE OR SEARCH CLASS:

30,	Cutlery, subclass 218 , for multiple shearing position shears using this mechanical movement.

46	Rack connections:
	This subclass is indented under subclass 45. Mechanisms, including a crank, lever, and slide and the connection between part of the members including a rack.

[List of Patents for class 74 subclass 47]

Crank and lever:

This subclass is indented under subclass 25. Mechanisms, including a crank and lever.

SEE OR SEARCH CLASS:

30,	Cutlery, subclass 219 , for multiple shearing position shears using this mechanical movement.

48	Slidable connections:
	This subclass is indented under subclass 47. Mechanisms, including a crank and lever with a slidable connection between the crank and lever.

[List of Patents for class 74 subclass 49]

Crank and slide:

This subclass is indented under subclass 25. Mechanisms, including a crank and slide.

SEE OR SEARCH CLASS:

30,	Cutlery, subclass 220 , for multiple shearing position shears using this mechanical movement.

50	Slidable connections (e.g., scotch yoke):
	This subclass is indented under subclass 49. Mechanisms, including a crank and slide with a slidable connection between the crank and slide.

51	Crank and multiple pitmans:
	This subclass is indented under subclass 25. Mechanisms, including a crank and more than one pitman.

52	Planetary gearing and slide:
	This subclass is indented under subclass 25. Mechanisms, including planetary gearing and a slide.

53	Cam, lever, and slide:
	This subclass is indented under subclass 25. Mechanisms, including a cam, lever, and slide.

[List of Patents for class 74 subclass 54]

Cam and lever:

This subclass is indented under subclass 25. Mechanisms, including a cam and lever.

SEE OR SEARCH CLASS:

30,	Cutlery, subclass 219 , for multiple shearing position shears using this mechanical movement.

[List of Patents for class 74 subclass 55]

Cam and slide:

This subclass is indented under subclass 25. Mechanisms, including a cam and slide.

SEE OR SEARCH THIS CLASS, SUBCLASS:

838,	for a cam and slide adjusting a stroke "on the fly".

SEE OR SEARCH CLASS:

30,	Cutlery, subclass 220 , for multiple shearing position shears using this mechanical movement.

Axial cam:

This subclass is indented under subclass 55. Mechanisms, including a cam and slide, the cam being of the axial type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

839,	for axial type cams adjusting a stroke "on the fly".

57	Grooved:
	This subclass is indented under subclass 56. Mechanisms, including a cam and slide, the cam being of the axial type and the cam surface being in the form of a groove in the cam surface.

58	Multiple screw:
	This subclass is indented under subclass 57. Mechanisms, including two axially grooved cams or screws rotating in opposite directions, one of which drives or is driven by the reciprocated or oscillated member or slide in one direction and the other in the opposite direction.

59	Alternately rotated screw:
	This subclass is indented under subclass 57. Mechanisms, including an axially grooved cam connected to a slide, the cam being alternately rotated as the slide alternately changes its direction.

[List of Patents for class 74 subclass 60]

Wabbler type:

This subclass is indented under subclass 55. Mechanisms, including an axial cam and slide, the cam being of the wabbler type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

123,	for intermittent wabbler gearing.

SEE OR SEARCH CLASS:

91,	Motors: Expansible Chamber Type, subclasses 499+ for expansible chamber motors utilizing wabbler type, axial cams and slides.
123,	Internal-Combustion Engines, subclasses 56.2+ for an internal-combustion engine which utilizes a rotary output shaft, parallel to the engine cylinders which is driven by a cam on the rotary output shaft.
475,	Planetary Gear Transmission Systems or Components, subclasses 163+ for planetary wabbler gearing.

[List of Patents for class 74 subclass 61]

Unbalanced weights:

This subclass is indented under subclass 25. Mechanisms, in which the mechanism involved makes use of unbalanced weights to produce the reciprocating or oscillating motion.

SEE OR SEARCH CLASS:

209,	Classifying, Separating, and Assorting Solids, subclass 367 , for apparatus utilizing this mechanical movement.

[List of Patents for class 74 subclass 62]

Trammel-pitman:

This subclass is indented under subclass 25. Mechanisms, in which the mechanism involved includes a cam having a plurality of intersecting slots, in which slide projections on a beam or connecting rod.

SEE OR SEARCH CLASS:

33,	Geometrical Instruments, subclasses 30.1+ , for ellipsographs.

63	Rotary to rotary:
	Mechanical movements for changing rotary motion to rotary motion.

[List of Patents for class 74 subclass 64]

Inertia or centrifugal transmitters:

This subclass is indented under subclass 63. Mechanisms, in which the motion is changed by means of inertia or centrifugal means.

SEE OR SEARCH CLASS:

173,	Tool Driving or Impacting, subclasses 93.5+ for a tool impacting device which comprises a connection adapted to rotate a tool in low torque condition and yield in overload to deliver torsional impact.

65	Crank, pitman, lever, and crank:
	This subclass is indented under subclass 63. Mechanisms in which the motion is changed by means of a crank, pitman, lever, and crank.

66	Crank, lever, and crank:
	This subclass is indented under subclass 63. Mechanisms, in which the motion is changed by means of a crank, lever, and crank.

67	Crank, pitman, and crank:
	This subclass is indented under subclass 63. Mechanisms, in which the motion is changed by means of a crank, pitman, and crank.

68	Cranks, link connected:
	This subclass is indented under subclass 63. Mechanisms, in which the motion is changed by means of cranks which are connected together by links.

69	Cranks, slidable connections:
	This subclass is indented under subclass 63. Mechanisms, in which the motion is changed by cranks which are slidably connected together.

[List of Patents for class 74 subclass 70]

Rotary to alternating rotary:

Mechanical Movements for converting rotary motion to alternating rotary motion.

SEE OR SEARCH THIS CLASS, SUBCLASS:

318,	through 324, for alternating rotary gearing.

[List of Patents for class 74 subclass 71]

Mangle connections:

This subclass is indented under subclass 70. Mechanisms, in which the motion is changed by means of a mangle and gearing and the driving member is the shiftable member.

(1) Note. By mangle is meant a rack, wheel, or any other movable member having teeth on opposite sides, engaged by a pinion which meshes with the opposite sides alternately, to convert the continuous rotary motion of the pinion to an oscillating or reciprocating motion of the mangle rack, or wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

318,	through 324, for converting rotary to alternating rotary motion by gearing not of the mangle type.

SEE OR SEARCH CLASS:

68,	Textiles: Fluid Treating Apparatus, appropriate subclasses, for apparatus using this mechanical movement.

72	Shiftable driven gear:
	This subclass is indented under subclass 71. Mechanisms, in which the motion is changed by means of a mangle and gearing and the driven member is the shiftable member.

73	Central teeth:
	This subclass is indented under subclass 72. Mechanisms, the driven gear being shiftable and the teeth on the mangle being located along the center line of the mangle.

74	Multilated gearing connections:
	This subclass is indented under subclass 71. Mechanisms, in which the motion is changed by means of a mangle and gearing and the gearing is mutilated.

75	Crank, pitman, and lever:
	This subclass is indented under subclass 70. Mechanisms, in which the motion is changed by means of a crank, pitman, and lever.

76	Reciprocating rack connections:
	This subclass is indented under subclass 70. Mechanisms, in which the motion is changed by means of a reciprocating rack.

77	Crank and pitman actuator:
	This subclass is indented under subclass 76. Mechanisms, in which the motion is changed by means of a reciprocating rack driven by a crank and pitman.

78	Simple crank actuator:
	This subclass is indented under subclass 76. Mechanisms, in which the motion is changed by means of a reciprocating rack driven directly by the crank.

79	Oscillating rack connections:
	This subclass is indented under subclass 70. Mechanisms, in which the motion is changed by means of an oscillating rack.

80	Mangle actuated:
	This subclass is indented under subclass 79. Mechanisms, in which the rack is mangle actuated.

81	Crank and pitman actuator:
	This subclass is indented under subclass 79. Mechanisms, in which the rack is driven by a crank and pitman.

[List of Patents for class 74 subclass 82]

Flexible connector type:

This subclass is indented under subclass 70. Mechanisms, in which the motion is changed by means of a flexible member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

95,	for other mechanical movements using flexible connectors.

[List of Patents for class 74 subclass 83]

Associated inertia devices:

This subclass is indented under subclass 70. Mechanisms, in which the motion is changed by inertia devices.

SEE OR SEARCH THIS CLASS, SUBCLASS:

92+,	for other mechanical movements utilizing inertia devices.

[List of Patents for class 74 subclass 84]

Rotary to intermittent unidirectional motion:

Mechanical Movements for changing rotary motion to intermittent unidirectional motion.

SEE OR SEARCH THIS CLASS, SUBCLASS:

111+,	for mechanical movements of the intermittent grip type which change rotary motion to intermittent unidirectional motion.
415,	for pin tooth gearing.
436,	for Geneva gears.

[List of Patents for class 74 subclass 86]

Rotary to gyratory:

Mechanical Movements for converting rotary motion to gyratory motion.

SEE OR SEARCH CLASS:

241,	Solid Material Comminution or Disintegration, subclasses 207+ , for comminutors utilizing this mechanical movement.

[List of Patents for class 74 subclass 87]

Unbalanced weight:

This subclass is indented under subclass 86. Mechanisms, in which the motion is changed by means of unbalanced weights.

SEE OR SEARCH CLASS:

209,	Classifying, Separating, and Assorting Solids, subclasses 366+ , for apparatus using unbalanced weights.
241,	Solid Material Comminution or Disintegration, subclass 210 , for comminutors utilizing this mechanical movement.

88	Reciprocating or oscillating to intermittent unidirectional motion:
	Mechanical Movements for converting reciprocating or oscillating motion to intermittent unidirectional motion.

[List of Patents for class 74 subclass 89]

Reciprocating or oscillating to or from alternating rotary:

Mechanical movement for converting oscillating or reciprocating motion to or from alternating rotary motion, all such motions as defined in the Glossary of this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

424.71

through 424.96, for screw and nut devices, per se.

GLOSSARY

ALTERNATING MOTION

The intermittent movement along a path, first in one direction and then in the opposite along such path.

OSCILLATING MOTION

Alternating motion of less than 360 degrees along an arcuate path.

RECIPROCATING MOTION

Alternating motion along a straight-line path.

ROTARY MOTION

The turning of a rigid body about an internal axis such that a point on the body travels through an arcuate path, about the axis, having an extent of 360 degrees or more.

[List of Patents for class 74 subclass 89.1]

89.1

Including inertia device:

This subclass is indented under subclass 89. Mechanical movement comprising movable input and output elements, movable means drivingly interconnecting said elements and a movable member having substantial mass joined to either of said elements or said means by a force-transmitting connection which is effective to vary the speed of the movable member at some time during its operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

83,	for other mechanical movement including inertia device.

89.11

With rack and pinion:

Mechanical movement under subclasses 89.1 including a straight or curved member having a series of teeth or recesses to mesh with a gear, such series having determinate effective length.

(1) Note. A gear with minor mutilation taught as being nevertheless continuously usable, without reversal, is not considered to be a rack.

89.12	Rectilinear rack:
	This subclass is indented under subclass 89.11. Mechanical movement wherein the rack teeth or recesses lie in a straight line.

89.13

Including bevel gears:

This subclass is indented under subclass 89. Mechanical movement comprising at least one pair of toothed elements, rotatable about nonparallel axes, having meshing toothed surfaces which are inclined to said axes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

423+,

for other mechanism containing bevel gearing.

89.14

Including worm:

This subclass is indented under subclass 89. Mechanical movement comprising a rotatable screw member for meshing with a complementary toothed gear or rack.

SEE OR SEARCH THIS CLASS, SUBCLASS:

425+,

for other mechanism containing worm gearing.

89.16

Including spur gear:

This subclass is indented under subclass 89. Mechanical movement comprising a wheel having radially projecting teeth located parallel to the axis of said wheel for meshing with another toothed member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

421,	for other mechanism containing spur gearing.

89.17	With rack:
	This subclass is indented under subclass 89.16. Mechanical movement including a straight or curved member having a series of teeth or recesses to mesh with a gear, such series having determinate effective length.

89.18	Curvilinear rack:
	This subclass is indented under subclass 89.17. Mechanical movement wherein the teeth or recesses lie in a curved line.

89.19	With biasing means:
	This subclass is indented under subclass 89.18. Mechanical movement comprising yieldable means which assists the motion of the movement in one direction or the other (e.g., spring, counter weight, etc.).

[List of Patents for class 74 subclass 89.2]

89.2

Including flexible drive connector (e.g., belt, chain, strand, etc.):

This subclass is indented under subclass 89. Mechanical movement including a yieldable transmission member engaged with the periphery of a pulley, or of a sprocket or other type wheel.

SEE OR SEARCH CLASS:

254,	Implements or Apparatus for Applying Pushing or Pulling Force, subclasses 266+ for a apparatus for hauling or hoisting a load which includes a driven drum for pulling on or traveling along a cable, and wherein either the drum or the cable is attached to the load.
474,	Endless Belt Power Transmission Systems or Components, Appropriate subclasses for power transmission via an endless belt.

89.21	With sprocket wheel:
	This subclass is indented under subclass 89.2. Mechanical movement including a member with peripheral cogs or teeth for engaging the flexible drive connector.

89.22	With pulley:
	This subclass is indented under subclass 89.2. Mechanical movement including a sheave or wheel with a grooved rim for receiving and frictionally cooperating with the flexible drive connector in driving or driven relationship.

89.23

Including screw and nut:

This subclass is indented under subclass 89. Subject matter including mechanical movement comprising a rotatable element having spiral threads or grooves encircling its axis of rotation and a second element enmeshed therewith for relative movement along the axis.

(1) Note. This subclass requires more (e.g., control of output, etc.) than the mere interaction of a screw and nut.

SEE OR SEARCH THIS CLASS, SUBCLASS:

424.71,

for screw and nut gearing, per se.

89.24	Shaft shorter than nut:
	This subclass is indented under subclass 89.23. Subject matter. Subject matter in which the area of meshing engagement of the threads of the screw and nut extends substantially from one end of the thread bearing portion of the screw to the other and the thread bearing portion of the nut is longer than that of the screw. Figure 1. A typical example of the subject matter.

89.25

Auxiliary drive (e.g., fluid piston, etc.) for load:

This subclass is indented under subclass 89.23. Subject matter including drive means in addition to drive means for the screw and nut and connected to the same load and capable of moving the nut when the screw and nut are not operating.

Image 1 for class 74 subclass 89.25

Figure 1. A typical example of the subject matter.

SEE OR SEARCH THIS CLASS, SUBCLASS:

89.29

through 89.31, for a screw and nut mechanical movement having plural inputs and a single output.

89.26

Alternate power path operable on failure of primary:

This subclass is indented under subclass 89.23. Subject matter in which there are plural distinct power paths between an input and output of the mechanism only one of which is active at an initial point in time and the mechanism includes means to activate the other power path upon failure of the initially active one to produce movement of the output.

(1) Note. The failure may be due to a structural failure of a portion of the mechanism or may be a designed operating mode of the mechanism activated by a change in load or other condition.

Image 1 for class 74 subclass 89.26

Figure 1. A typical example of the subject matter.

89.27	Single input split into two intermediate outputs that are subsequently superposed into a single output:
	This subclass is indented under subclass 89.23. Subject matter in which there are two power paths between a single input and a single output of the mechanical movement that are in use simultaneously. Figure 1. A typical example of the subject matter.

89.28	Single input, plural outputs:
	This subclass is indented under subclass 89.23. Subject matter in which a single input drives plural outputs. Figure 1. A typical example of the subject matter.

89.29

Plural inputs, single output:

This subclass is indented under subclass 89.23. Subject matter including plural power paths between plural inputs and a single output.

Image 1 for class 74 subclass 89.29

Figure 1. A typical example of the subject matter.

SEE OR SEARCH THIS CLASS, SUBCLASS:

89.25,

for a single output independently driven by a screw and nut mechanism and an additional drive mechanism.

89.3	Plural nuts driving shaft:
	This subclass is indented under subclass 89.29. Subject matter in which there are plural nuts on a single integral shaft, both of which nuts are simultaneously driven to drive the shaft. Figure 1. A typical example of the subject matter.

89.31	Shaft and nut driven:
	This subclass is indented under subclass 89.29. Subject matter in which the shaft and nut are simultaneously driven.

89.32	Carriage surrounding, guided by, and primarily supported by member other than screw (e.g., linear guide, etc.):
	This subclass is indented under subclass 89.23. Subject matter in which the screw and nut drive a carriage that at least partially surrounds a fixed structure (guide) that supports substantially all of a load on the carriage transverse to the screw. Figure 1. A typical example of the subject matter.

89.33	Carriage surrounded, guided, and primarily supported by member other than screw (e.g., linear guide, etc.):
	This subclass is indented under subclass 89.23. Subject matter in which the screw and nut drive a carriage that is at least partially surrounded by a fixed structure (guide) that supports substantially all of a load on the carriage transverse to the screw. Figure 1. A typical example of the subject matter.

89.34	Shaft moves through rotary drive means:
	This subclass is indented under subclass 89.23. Subject matter including means for rotating the screw that includes a rotating hollow member through which the screw passes. Figure 1. A typical example of the subject matter.

89.35	Plural screws in series (e.g., telescoping, etc.):
	This subclass is indented under subclass 89.23. Subject matter in which plural screws each associated with a different driving or driven nut form a single power path in which a nut on one screw drives a second screw. Figure 1. A typical example of the subject.

89.36	Deflection related:
	This subclass is indented under subclass 89.23. Subject matter constructed to accommodate, prevent, reduce, or mitigate lateral deflection or misalignment of the screw and nut. Figure 1. A typical example of the subject matter.

89.37

Limit stop:

This subclass is indented under subclass 89.23. Subject matter including means to stop motion of the output of the screw and nut mechanism at a predetermined position of the output.

(1) Note. The output position may be predetermined relative to the nut or screw or to a supporting structure for the mechanism.

Image 1 for class 74 subclass 89.37

Figure 1. A typical example of the subject matter.

SEE OR SEARCH THIS CLASS, SUBCLASS:

89.38,	for a screw and nut mechanical movement having means for interrupting transmission of power from input to output.
89.39,	for a screw and nut mechanical movement having means to retard or stop the screw or nut.

89.38

Including means to selectively transmit power (e.g., clutch, etc.):

This subclass is indented under subclass 89.23. Subject matter including structure in the power path that may be altered in normal use to assume a state in which it connects two points in the power path so as to be capable of transmitting drive force between the two points and a state in which it is not capable of transmitting such force.

(1) Note. A brake that selectively prevents rotation of nut relative to shaft so that the nut selectively moves axially of the shaft or rotates with it will be found here.

89.39

Means to selectively lock or retard screw or nut:

This subclass is indented under subclass 89.23. Subject matter including a structure mounted on a stationary support constructed to selectively apply a force to the nut or screw (1) tending to retard the motion of the nut or screw or (2) maintaining the nut or screw in a stationary state.

(1) Note. A brake that selectively prevents rotation of nut relative to shaft so that the nut selectively moves axially of the shaft or rotates with it will be found elsewhere. See the search notes below. In these devices, the nut is not mounted on a stationary support.

Image 1 for class 74 subclass 89.39

Figure 1. A typical example of the subject matter.

SEE OR SEARCH THIS CLASS, SUBCLASS:

89.37,	for a limit stop that may include an abutment integral with a screw for halting a nut traveling along the screw.
89.38,	for a brake that selectively prevents rotation of nut relative to shaft so that the nut selectively moves axially of the shaft or rotates with it. See (1) Note above.

[List of Patents for class 74 subclass 89.4]

89.4

Contamination related:

This subclass is indented under subclass 89.23. Subject matter including means for impeding the movement of material onto or from the screw or nut from or to the surrounding environment.

(1) Note. Devices of this subclass may, for example, prevent foreign, potentially damaging, or disrupting particles from entering the space between a screw and nut or may prevent lubricant or the like from being released from the space to the surroundings. Also included are devices that remove contaminants from the screw and nut interface.

Image 1 for class 74 subclass 89.4

Figure 1. A typical example of the subject matter.

89.41	Imperforate enclosure:
	This subclass is indented under subclass 89.4. Subject matter including a barrier surrounding a space containing both the screw and nut so as to prevent movement of material into and out of the space. Figure 1. A typical example of the subject matter.

89.42	Backlash:
	This subclass is indented under subclass 89.23. Subject matter related to reduction or mitigation of play between the threads of the screw and nut. Figure 1. A typical example of the subject matter.

89.43

Pressurized fluid introduced between nut and screw:

This subclass is indented under subclass 89.23. Subject matter having structure in the screw or nut for introducing fluid under pressure into the space between the screw and nut so as to maintain a separation between their threads.

Image 1 for class 74 subclass 89.43

Figure 1. A typical example of the subject matter.

SEE OR SEARCH THIS CLASS, SUBCLASS:

89.44,

for a screw and nut mechanical movement having means for introducing a lubricant between the screw and nut.

SEE OR SEARCH CLASS:

384,	Bearings, subclasses 12 and 100-124 for a fluid bearing.

89.44

Lubrication:

This subclass is indented under subclass 89.23. Subject matter in which the screw or nut has specific structure for reducing sliding friction between the screw and nut.

(1) Note. For example, the structure for reducing sliding friction may be a passage for allowing lubricating fluid to reach the space between the nut and screw or may involve the provision of lubricant impregnated (i.e., self-lubricating) material associated with the nut or screw.

Image 1 for class 74 subclass 89.44

Figure 1. A typical example of the subject matter.

SEE OR SEARCH CLASS:

184,	Lubrication, for general purpose lubricating structure.
384,	Bearings, subclasses 322 through 415,462-475, and 606 for lubricating structure specific to a bearing.

89.45	Manually driven:
	This subclass is indented under subclass 89.23. Subject matter in which the mechanism is constructed to permit a person to supply its input power without the use of tools.

96	Oscillating to oscillating:
	Mechanical movements for converting oscillating motion to oscillating motion.

[List of Patents for class 74 subclass 97.1]

97.1

Snap action:

This subclass is indented under subclass 96. Mechanism wherein the energy of the driving member is stored during the beginning of the stroke and is imparted to the driven member during the latter part of the stroke to impart a rapid motion to the driven member.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 402+ for a switch of that class having a movable contact and an actuator, and wherein the contact is quickly or abruptly moved independently of the actuator during actuation, which movement frequently is accomplished by a spring connection between the contact and the actuator.
236,	Automatic Temperature and Humidity Regulation, subclass 48 for a temperature control valve whose operating force is stored until such time as the valve can be moved suddenly through its total range.
251,	Valves and Valve Actuation, subclass 75 for a valve having an actuator which imparts to the valve an accelerated motion during a particular portion of its movement.

[List of Patents for class 74 subclass 97.2]

97.2

Plate spring:

This subclass is indented under subclass 97.1. Mechanism wherein the driving member is a thin, resilient element which is in a distorted condition in either one of the two positions which it customarily occupies, and which, when moved by an external force away from one position in the direction of the other position, undergoes a reversal of distortion, resulting in a rapid movement between the two positions.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, subclass 89.29 for a clutch which is operated by a quick-throw spring.
267,	Spring Devices, subclass 159 for a device of that class in the nature of a snap spring.

98	Geared connections:
	This subclass is indented under subclass 96. Mechanisms, in which the motion is changed by means of gears.

99	Reciprocating to or from oscillating:
	Mechanical movements for converting reciprocating motion to or from oscillating motion.

100.1

Snap action:

This subclass is indented under subclass 99. Mechanism wherein the energy of the driving member is stored during the beginning of the stroke and is imparted to the driven member during the latter part of the stroke to impart a rapid motion to the driven member.

SEE OR SEARCH CLASS:

200,	Electricity: Circuit Makers and Breakers, subclasses 402+ for a switch of that class having a movable contact and an actuator, and wherein the contact is quickly or abruptly moved independently of the actuator during actuation, which movement frequently is accomplished by a spring connection between the contact and the actuator.
236,	Automatic Temperature and Humidity Regulation, subclass 48 for a temperature control valve whose operating force is stored until such time as the valve can be moved suddenly through its total range.
251,	Valves and Valve Actuation, subclass 75 for a valve having an actuator which imparts to the valve an accelerated motion during a particular portion of its movement.

100.2

Plate spring:

This subclass is indented under subclass 100.1. Mechanism wherein the driving member is a thin, resilient element which is in a distorted condition in either one of the two positions which it customarily occupies, and which, when moved by an external force away from one position in the direction of the other position, undergoes a reversal of distortion, resulting in a rapid movement between the two positions.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, subclass 89.29 for a clutch which is operated by a quick-throw spring.
267,	Spring Devices, subclass 159 for a device of that class in the nature of a snap spring.

101	Compound lever and slide:
	This subclass is indented under subclass 99. Mechanisms, in which the motion is changed by means of a compound lever and slide.

102	Lever and slide:
	This subclass is indented under subclass 99. Mechanisms, in which the motion is changed by means of a lever and slide.

103	Straight line motions:
	This subclass is indented under subclass 102. Mechanisms, in which the motion is changed by means of a lever and slide and the path of the reciprocating member is a straight line.

104	Slidable connections:
	This subclass is indented under subclass 102. Mechanisms in which the motion is changed by means of a lever and slide and the connection between the lever and slide is slidable.

105	Link connections:
	This subclass is indented under subclass 102. Mechanisms, in which the motion is changed by means of a lever and slide which are connected together by a link.

106

Toggle transmissions:

This subclass is indented under subclass 102. Mechanisms, in which the motion is changed by means of a lever and slide which are connected together by a toggle.

SEE OR SEARCH CLASS:

81,	Tools, subclasses 363 and 367+ for toggle-actuated pliers.

107	Cam connections:
	This subclass is indented under subclass 102. Mechanisms, in which the motion is changed by means of a lever and slide which are connected together by cams.

108	Flexible connections:
	This subclass is indented under subclass 102. Mechanisms, in which the motion is changed by means of a lever and slide which are connected together by a flexible member.

109	Rack and pinion:
	This subclass is indented under subclass 99. Mechanisms, in which the motion is changed by means of a rack and pinion.

110	Reciprocating to reciprocating:
	Mechanical movements for changing reciprocating motion to reciprocating motion.

[List of Patents for class 74 subclass 111]

111

MECHANICAL MOVEMENTS (INTERMITTENT GRIP TYPE):

This subclass is indented under the class definition. Mechanisms, provided with parts adapted to impart step-by-step motion to a unidirectionally driven member.

(1) Note. For intermittent grip devices, of special application, see the arts to which they are applied.

SEE OR SEARCH THIS CLASS, SUBCLASS:

84,	435, and 436, for specialized forms of intermittent grip mechanisms.

SEE OR SEARCH CLASS:

72,	Metal Deforming, subclass 422 + for machines for feeding metal stock having intermittently reciprocated gripping mechanisms which grasp the bar of stock, advance to feed the same to a chuck, then release the stock, and return to their first position.
81,	Tools, subclass 314 for pliers with incremental jaw movement.
188,	Brakes, subclasses 82.1+ , for brakes applied to elements rotating relative to stationary elements to prevent retrograde rotation while allowing forward rotation.
368,	Horology: Time Measuring Systems or Devices, subclass 75 , for electric clocks having an intermittent striking signal.

[List of Patents for class 74 subclass 112]

112

Rotary to intermittent unidirectional motion:

This subclass is indented under subclass 111. Mechanisms having a rotary driving member and provided with parts adapted to impart step-by-step motion to a unidirectionally driven member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

84,	for nonintermittent grip type movements for changing rotary and intermittent unidirectional movement.
435,	for mutilated rotary gear bodies. 436, for Geneva gears.

SEE OR SEARCH CLASS:

352,	Optics: Motion Pictures, subclasses 187+ and 191+ for intermittent feed mechanisms for motion picture apparatus.

113	Automatically controlled:
	This subclass is indented under subclass 112. Mechanisms in which the transmission ratio is controlled automatically.

[List of Patents for class 74 subclass 114]

114

Speed:

This subclass is indented under subclass 113. Mechanisms in which the transmission ratio is controlled automatically by speed responsive elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

601,	for automatically adjustable cranks and wrist pins.

[List of Patents for class 74 subclass 116]

116

Rotary crank or eccentric drive:

This subclass is indented under subclass 112. Mechanisms having a rotary crank or eccentric driving member and provided with parts adapted to impart step-by-step motion to a unidirectionally driven member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

118,	120, and 510, for eccentric features.
595+,	for crank features.

[List of Patents for class 74 subclass 117]

117

Adjustable:

This subclass is indented under subclass 116. Mechanisms, having an adjustable driving member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

121,	for other adjustable throw cranks and eccentrics.
571.1,	for adjustable eccentrics.
600,	for adjustable cranks.

118	Lever transmitter:
	This subclass is indented under subclass 116. Mechanisms in which the parts include an intermediate lever pivoted to some supporting structure.

119	Adjustable leverage:
	This subclass is indented under subclass 118. Mechanisms, in which the parts include an intermediate lever of adjustable ratio pivoted to some supporting structure.

120	Rack and pinion transmitter:
	This subclass is indented under subclass 116. Mechanisms, in which the parts include rack and pinion transmitting elements.

[List of Patents for class 74 subclass 121]

121

Adjustable throw:

This subclass is indented under subclass 120. Mechanisms, in which the parts include rack and pinion transmitting elements, and means are provided for varying the extent of effective movement of those elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

117,	for adjustments other than by changing the throw for this mechanical movement.

[List of Patents for class 74 subclass 122]

122

Rotary cam drive:

This subclass is indented under subclass 116. Mechanisms, having a rotary cam driving member and provided with parts adapted to impart step-by-step motion to a unidirectionally driven member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

567+,

for cams, per se.

[List of Patents for class 74 subclass 123]

123

Adjustable throw:

This subclass is indented under subclass 122. Mechanisms, in which the extent of movement of the transmitting parts may be varied.

SEE OR SEARCH THIS CLASS, SUBCLASS:

60,	for wabble type mechanical movements.
568,	for adjustable cams.

[List of Patents for class 74 subclass 124]

124

Radial cam:

This subclass is indented under subclass 123. Mechanisms and having a radial cam.

SEE OR SEARCH THIS CLASS, SUBCLASS:

125,	for other radial cam actuators.
568,	for adjustable cams.

[List of Patents for class 74 subclass 125]

125

Radial cam:

This subclass is indented under subclass 122. Mechanisms and having a radial cam.

SEE OR SEARCH THIS CLASS, SUBCLASS:

567+,

for cams.

125.5

Intermittently engaged clutch:

This subclass is indented under subclass 112. Mechanisms in which the parts include periodically engageable clutch elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

322,	through 324, for alternatively rotary gearing involving clutchable gears.

126	Oscillation or reciprocation to intermittent unidirectional motion:
	This subclass is indented under subclass 111. Mechanisms and having either an oscillating or reciprocating driving member and provided with parts adapted to impart step-by-step motion to a unidirectionally driven member.

[List of Patents for class 74 subclass 127]

127

Screw and nut devices:

This subclass is indented under subclass 126. Mechanisms, in which the parts include relatively movable screw and nut elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

57+,	for nonintermittent grip type movements involving axially grooved cams, and slides.

[List of Patents for class 74 subclass 128]

128

Slide actuator:

This subclass is indented under subclass 126. Mechanisms, in which the driving member is in the form of a slidable actuator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

160+,

for slide gripper mountings.

129	Multiple acting:
	This subclass is indented under subclass 128. Mechanisms, in which a slidable actuator is adapted to impart motion to the driven member in both directions of its movement or in which a plurality of slidable actuators are adapted to impart motion to the driven member in sequence.

[List of Patents for class 74 subclass 130]

130

Rack actuator:

This subclass is indented under subclass 126. Mechanisms, in which the driving member is provided with rack teeth.

SEE OR SEARCH CLASS:

401,	Coating Implements With Material Supply, subclass 66 , for a pencil, or the like, including a rack and pawl mechanism for advancing a piece of lead step-by-step to compensate for attrition.

131	Multiple acting:
	This subclass is indented under subclass 130. Mechanisms, in which a single driving member having rack teeth is capable of imparting motion to the driven member in both directions of its movement or in which a plurality of driving members having rack teeth are adapted to impart motion to the driven member in sequence.

132	Inwardly facing racks:
	This subclass is indented under subclass 131. Mechanisms, in which the driving member is provided with inwardly facing rack teeth and is effective in both directions of its movement to impart motion to the driven member.

133	Oscillating:
	This subclass is indented under subclass 130. Mechanisms, in which the rack is oscillatable.

134	Multiple acting:
	This subclass is indented under subclass 133. Mechanisms, in which the oscillatable rack is adapted to impart motion to the driven member in both directions of its movement or in which a plurality of oscillatable racks are adapted to impart motion to the driven member in sequence.

135	Inwardly facing racks:
	This subclass is indented under subclass 134. Mechanisms, in which the rack is provided with inwardly facing teeth and is effective in both directions of its movement.

136	Multiple acting:
	This subclass is indented under subclass 126. Mechanisms, in which a single driving member in the form of a strap, chain, belt, etc., is adapted to impart motion to the driven member in both directions of its movement or in which a plurality of straps are adapted to impart motion to the driven member in sequence.

137	Spring or weight return:
	This subclass is indented under subclass 136. Mechanisms, in which a spring or weight moves the strap in one direction.

138	Single acting:
	This subclass is indented under subclass 126. Mechanisms, in which the driving member is in the form of a strap, chain, or belt and is effective in only one direction of movement to impart motion to the driven member.

[List of Patents for class 74 subclass 139]

139

Engine starter type:

This subclass is indented under subclass 138. Mechanisms in which the entire device is particularly designed for uses as an engine starter but is adapted for other uses.

(1) Note. This subclass includes only the intermittent grip type of engine starters capable of general use.

(2) Note. If the use is limited to engine starting, see the appropriate starter classes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

6+,	for engine starters and see (1) Note supra.

SEE OR SEARCH CLASS:

123,	Internal-Combustion Engines, subclasses 185.1+ , for mechanical starters, and see (1) Note supra.

[List of Patents for class 74 subclass 140]

140

Spring or weight return:

This subclass is indented under subclass 139. Mechanisms, in which a spring or weight is adapted to return the strap to its initial position.

SEE OR SEARCH CLASS:

123,	Internal Combustion Engines, subclasses 185.1+ , for mechanical starters, and see (1) Note supra.

141	Spring or weight return:
	This subclass is indented under subclass 138. Mechanisms, in which a spring or weight is adapted to return the strap to its initial position.

141.5

Lever actuator:

This subclass is indented under subclass 126. Mechanisms in which the driving member is a lever effective in its oscillation to impart motion to the driven member.

(1) Note. It should be noted that the movement of the lever and driven element is relative. Hence, if the "driven" element is held or fixed, and the support or pivot of the lever is compelled to move in the required manner by the oscillation or reciprocation of the lever, such structure will satisfy the terms of this definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

156+,

for lever gripper mountings.

SEE OR SEARCH CLASS:

254,	Implements or Apparatus for Applying Pushing or Pulling Force, subclasses 31 , 105+, 206+, 210, 237+, and 245 for similar mechanisms for imparting a step-by-step movement to a traveling bar or rack.

142	Rotary driven element:
	This subclass is indented under subclass 141.5. Mechanisms in which the intermittently driven member revolves around a relatively fixed axis.

[List of Patents for class 74 subclass 143]

143

Multiple acting:

This subclass is indented under subclass 142. Mechanisms in which a single driving member in the form of a lever, is adapted to impart motion to the driven member in both directions of oscillation of the lever or in which a plurality of levers are adapted to impart motion to the driven member in sequence.

SEE OR SEARCH THIS CLASS, SUBCLASS:

158+,

for multiple acting lever gripping mountings.

[List of Patents for class 74 subclass 144]

144

Grip units and features:

This subclass is indented under subclass 111. Devices, adapted to form parts of more complex intermittent grip mechanisms and to impart step-by-step motion directly to a unidirectionally driven member.

(1) Note. The line between these subclasses and Class 192, Clutches and Power-Stop Control, subclass 41, with respect to one way clutches and clutch operators is as follows: Class 192, will take the clutch, per se, with or without the clutch operator. The inclusion of additional elements; e.g., a holding pawl for the part driven by the clutch, will cause classification in this class (74).

SEE OR SEARCH THIS CLASS, SUBCLASS:

505,	for hand operated gear, drum and cable controllers.
575,	for pawls and ratchets, per se.

SEE OR SEARCH CLASS:

81,	Tools, subclasses 58+ , for clutched head wrenches or screwdrivers, and subclasses 28+ for a ratchet bit stock.
188,	Brakes, subclasses 82.1+ , for brakes applied to elements rotating relative to stationary elements to prevent retrograde rotation while allowing forward rotation.
192,	Clutches and Power-Stop Control, for one way clutches and actuators, and see (1) Note supra.
254,	Implements or Apparatus for Applying Pushing or Pulling Force, subclasses 108+ , 206+, and 237+ for pawl operated step-by-step traveling bar type implements or apparatus.
368,	Horology: Time Measuring Systems or Devices, subclasses 59+ for secondary electric clock mechanism.
401,	Coating Implements With Material Supply, subclasses 65+ , for a pencil or the like, including a chuck for advancing a piece of lead step-by-step to compensate for attrition.

145	Compound movement handle:
	This subclass is indented under subclass 144. Devices, including a handle capable of movement in a plurality of planes.

146	Reversible:
	This subclass is indented under subclass 145. Devices, including a handle capable of movement in a plurality of planes and adapted to impart either forward or reverse motion to the driven member.

147	Transverse pivots:
	This subclass is indented under subclass 145. Devices, in which the handle is swingable about an axis transverse to the axis of rotation of the driven member.

[List of Patents for class 74 subclass 148]

148

Gripper releasing devices:

This subclass is indented under subclass 144. Devices, in which means are provided for releasing a gripper from the driven member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

679,	for gearing having this mechanical movement in one of a plurality of power paths to or from the gearing.

SEE OR SEARCH CLASS:

188,	Brakes, subclass 82.3 , for one-way brakes which include means to render them inoperative to prevent retrograde motion of a rotating member.
475,	Planetary Gear Transmission Systems or Components, subclass 217 for disc and wheel type gearing in one of plural power paths to planetary gearing.

149	Power pawl lifter:
	This subclass is indented under subclass 148. Devices, in which the pawl disengaged is the driving or power transmitting pawl.

150	Automatic:
	This subclass is indented under subclass 149. Devices, in which means are provided for automatically disengaging a power transmitting pawl from the driven member.

151	Idle stroke:
	This subclass is indented under subclass 150. Devices, in which means are provided for automatically disengaging a power transmitting pawl from the driven member during the idle or return movement of the pawl.

152

Cooperating holding pawl:

This subclass is indented under subclass 151. Devices, in which a holding pawl is adapted to prevent retrograde movement of the driven member.

SEE OR SEARCH CLASS:

235,	Registers, subclass 131 , for overthrow preventers.

153	Power stroke:
	This subclass is indented under subclass 150. Devices, in which means are provided for automatically disengaging a power transmitting pawl from the driven member during the power or working movement of the pawl.

154	Cooperating holding pawl:
	This subclass is indented under subclass 149. Devices, in which means are provided for disengaging a power pawl from the driven member and an auxiliary holding pawl is adapted to prevent retrograde movement of the driven member.

155	Holding pawl lifter:
	This subclass is indented under subclass 148. Devices, provided with a holding pawl for preventing retrograde movement of the driven member, the said holding pawl being disengaged from the driven member by the movement of some part of the device.

156

Gripper mountings, lever:

This subclass is indented under subclass 144. Devices, in which the element which engages the driven member is mounted on a lever actuator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

118+,

and 142+, for lever actuated intermittent grip type devices.

157	Reversible:
	This subclass is indented under subclass 156. Devices, in which the element which engages the driven member may be shifted to impart either forward or reverse motion to the driven member.

158	Multiple acting:
	This subclass is indented under subclass 156. Devices, in which a plurality of elements are adapted to engage one or more driven members and are mounted on one or more lever actuators.

159	Single ratchet or clutch:
	This subclass is indented under subclass 158. Devices, in which the driven member is in the form of a single ratchet or clutch to provide only one set of teeth for cooperation with the plurality of elements.

[List of Patents for class 74 subclass 160]

160

Gripper mountings, slide:

This subclass is indented under subclass 144. Devices, having the element adapted to engage the driven member mounted on a slidable actuator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

128,	for other slide actuators.

[List of Patents for class 74 subclass 161]

161

Multiple acting:

This subclass is indented under subclass 160. Devices, in which a plurality of elements are adapted to engage one or more driven members and are mounted on one or more slide actuators.

SEE OR SEARCH THIS CLASS, SUBCLASS:

129,	for other multiple acting slide actuators.

[List of Patents for class 74 subclass 162]

162

Grip features:

This subclass is indented under subclass 144. Devices, limited to the combination of the details of the power imparting element, per se, and the driven member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

575+,

for pawls and ratchets, per se.

SEE OR SEARCH CLASS:

81,	Tools, subclasses 58+ , for clutched head wrenches or screwdrivers, and subclasses 28+ for a ratchet bit stock.
192,	Clutches and Power-Stop Control, subclasses 41+ , for automatic one way engaging clutches.

163	Driving band:
	This subclass is indented under subclass 162. Devices, in which the power imparting element is in the form of a band surrounding the driven member.

164	Clamping:
	This subclass is indented under subclass 163. Devices, in which the power imparting element is in the form of a band surrounding the driven member and which actuates the driven member intermittently by being clamped thereto and unclamped therefrom.

165	Driven band and gripper:
	This subclass is indented under subclass 162. Devices, in which the driven member is in the form of an endless band, such as a chain or belt.

166	Positive grip:
	This subclass is indented under subclass 165. Devices, provided with means to prevent slippage between the power imparting elements and the driven member.

167	Driving ratchet-bar or rack:
	This subclass is indented under subclass 162. Devices, in which the power imparting element is in the form of a ratchet bar or rack.

168	Multiple acting:
	This subclass is indented under subclass 167. Devices, in which a plurality of power imparting elements in the form of ratchet bars or racks actuate the driven member.

[List of Patents for class 74 subclass 169]

169

Driven ratchet-bar and power dog:

This subclass is indented under subclass 162. Devices, in which the power imparting element is in the form of a pawl adapted to cooperate with the teeth of a ratchet bar which comprises the driven member.

SEE OR SEARCH CLASS:

254,	Implements or Apparatus for Applying Pushing or Pulling Force, subclasses 108+ , 206+, and 237+ for pawl operated step-by-step traveling bar type implements or apparatus.

	Gearing Frictional.
	This subclass is indented under subclass 640. Gearing, comprising rotary elements having substantially smooth surfaces in contact with each other, or in line or point contact with an interposed member, to produce a relative rolling motion between them due to contact of surfaces.

216.3

Toothed gear and recirculated unconnected elements:

This subclass is indented under subclass 640. Gearing which includes a guide tube in the form of a closed path, a plurality of free running independent bodies (e.g., balls) within and substantially filling said tube, and one or more notched rotary elements tangentially engaging the bodies axially of the run thereof to thereby transmit and/or receive power axially of the run by the compressive action of the bodies upon each other in the forward run of the path.

SEE OR SEARCH THIS CLASS, SUBCLASS:

458+,	for worm and helical gearing in which power is transmitted through the medium of balls received in pockets formed by the grooves of the meshing gears and in which the balls serve as antifriction elements.
499,	and 500, for the gearing there classified and including the use of balls as antifriction elements between the meshing grooves of the gears.

SEE OR SEARCH CLASS:

60,	Power Plants, subclass 326 , for a motor driven by a recirculated motive fluid comprising a mixture, suspension or semi-solid.

[List of Patents for class 74 subclass 318]

318

Alternating rotary or continuous:

This subclass is indented under subclass 640. Gearing combinations comprising one or more trains of gears for converting the continuous rotation of a driving gear to an alternating rotation of a driven element and in which additional elements may be provided for continuing the rotation of the driven element in one direction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

70+,	for rotary to alternating rotary mechanical movements.

[List of Patents for class 74 subclass 319]

319

Alternating rotary:

This subclass is indented under subclass 640. Gearing combinations comprising one or more trains of gears for converting the continuous rotation of a driving element to an alternating rotation of a driven element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

70+,	for rotary to alternating rotary mechanical movements.

320	Progressive:
	This subclass is indented under subclass 319. Gearing, in which the driven element is rotated a greater amount in one direction than in the other.

[List of Patents for class 74 subclass 321]

321

Shiftable and/or slidable gears:

This subclass is indented under subclass 319. Gearing, embodying shiftable and/or slidable gears for effecting an alternating rotation of the driven member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

355,	for interchangeably locked, single forward and reverse speed gearing.

[List of Patents for class 74 subclass 322]

322

Clutchable gears:

This subclass is indented under subclass 319. Gearing, embodying engageable and disengageable clutches for effecting an alternating rotation of the driven members.

SEE OR SEARCH THIS CLASS, SUBCLASS:

125.5,	for clutch operated mechanical movements of the rotary to intermittent unidirectional type.
361,	and 376+, for forward and reverse interchangeably locked gearing involving clutches.

SEE OR SEARCH CLASS:

474,	Endless Belt Power Transmission Systems or Components, particularly subclasses 1+ for a control for reversing the direction of rotation of an output shaft in a belt and pulley drive system.

323	On single driven member:
	This subclass is indented under subclass 322. Alternating rotary gearing, in which the clutches are all mounted on the alternating driven member.

324	On single driving member:
	This subclass is indented under subclass 322. Alternating rotary gearing, in which the clutches are all mounted on the continuously rotating driving member.

[List of Patents for class 74 subclass 325]

325

Interchangeably locked:

This subclass is indented under subclass 640. Transmissions in which a plurality of speeds are transmitted from one shaft to another by optionally engaging or meshing selected gears or clutches or gears and clutches, to their supporting shafts.

(1) Note. These transmissions include those which provide speed changes (1) by means of interchanging meshed gears on their shafts or (2) by replacing such gears with gears of different sizes.

(2) Note. Such gearing is found in various arts, for examples of which see the Search Notes below.

SEE OR SEARCH CLASS:

29,	Metal Working, subclasses 27+ , for lathes of the combined machine type and (see Note 2).
82,	Turning, subclass 29 , for change speed gear for headstocks. (See Note 2).
408,	Cutting by Use of Rotating Axially Moving Tool, subclasses 124+ , for drilling machines having miscellaneous drives. (See Note 2).
409,	Gear Cutting, Milling, or Planing, subclasses 64+ , for milling machines. (See (2) Note).

329	Disconnectable counter shaft:
	This subclass is indented under subclass 325. Transmissions involving change of speed in which the counter shaft is disconnected from the drive shaft when the drive is not through the counter shaft.

[List of Patents for class 74 subclass 330]

330

Multiple concentric clutch shafts:

This subclass is indented under subclass 325. Transmissions either (1) wherein the drive from the prime mover to the transmission is through a manually selected one of a plurality of concentric drive shafts, each of which has a clutch for engagement with the engine clutch; or (2) wherein the drive from the transmission to the propeller shaft is by means of a manually selected one of a plurality of concentric driven shafts each of which has a clutch for engagement with a clutch on the propeller shaft.

SEE OR SEARCH THIS CLASS, SUBCLASS:

336+,	for automatic speed responsive interchangeably locked gearing.
363+,	for spur gear type, progressive multiple key, single clutch shaft interchangeably locked gearing.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, subclasses 48.1+ for plural clutch-assemblages, 52.1+ for a progressive engagement clutch, and 103+ for a speed-responsive clutch.

[List of Patents for class 74 subclass 331]

331

Plurality of counter shafts:

This subclass is indented under subclass 325. Transmission in which the change of speed from the drive shaft to the driven shaft may be through a selected one of a plurality of counter shafts.

SEE OR SEARCH THIS CLASS, SUBCLASS:

333,	for combined gear and clutch type interchangeably locked gearing.
343,	for selective, longitudinally slidable direct clutch and drive type interchangeably locked gearing.
359,	for selective, multiple clutch shaft, interchangeably locked gearing.
373+,	for selective, single clutch shaft, interchangeably locked gearing.

332	Internal-external gears:
	This subclass is indented under subclass 325. Transmissions wherein the transmission of power from the drive shaft to the driven shaft is by means of internal-external gears in conjunction with shiftable gears, or shiftable clutches, with constantly meshed gears, or both, in a single unit.

[List of Patents for class 74 subclass 333]

333

Combined gear and clutch:

This subclass is indented under subclass 325. Transmissions composed of shiftable gears, and shiftable clutches, or shiftable gears provided with clutch elements, all in one gearing combination, wherein selected gears or clutches are manually shifted into or out of mesh with cooperating gears or clutches.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, subclass 20 , for combined clutches and gears, where the gearing controls the clutch.

[List of Patents for class 74 subclass 334]

334

Preselector:

This subclass is indented under subclass 333. Transmissions, wherein the selected gears or clutches are manually shifted into or out of mesh with cooperating gears or clutches by operation of a clutch pedal after a separate preselective change speed device has been set.

SEE OR SEARCH THIS CLASS, SUBCLASS:

474,	for pedal-operated devices.

335	Control mechanism:
	This subclass is indented under subclass 325. Transmissions composed of shiftable gears, or shiftable clutches with constantly meshed gears, or shiftable gears and shiftable clutches, wherein the shifting is accomplished by mechanical power driven means.

[List of Patents for class 74 subclass 336]

336

Speed responsive:

This subclass is indented under subclass 335. Transmissions, wherein the shifting is accomplished either by means responsive to the speed of some part of the transmission or by means responsive to both speed and torque conditions of the transmission.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, subclasses 103+ , for speed responsive clutches.
475,	Planetary Gear Transmission Systems or Components, subclasses 254+ for condition responsive control of planetary gearing.

336.5

Governor:

This subclass is indented under subclass 336. Transmissions, wherein the shifting is accomplished by a governor responsive to the speed of some part of the transmission.

SEE OR SEARCH THIS CLASS, SUBCLASS:

404.5,

for governor controlled reverse gearing.

SEE OR SEARCH CLASS:

73,	Measuring and Testing, subclasses 488+ for a speed responsive device, per se.

[List of Patents for class 74 subclass 337]

337

Torque responsive:

This subclass is indented under subclass 335. Transmissions, wherein the shifting is automatically accomplished by means operated in response to either the torque of the engine or of the driven shaft.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, subclasses 54.1+ , for torque responsive clutches.

337.5

Cam operated:

This subclass is indented under subclass 335. Transmissions, wherein the shifting is accomplished by means of a manually operable cam which is connected to the shiftable member so that operation of the cam produces progressive changes in gear ratios.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, subclass 93 , for cam operators for clutches.

[List of Patents for class 74 subclass 339]

339

Meshing assisters:

This subclass is indented under subclass 325. Transmissions, wherein a means is provided for synchronizing the speed of the member which is being shifted with the speed of the member to be engaged by the shiftable member prior to engagement thereof.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, subclasses 53.1+ .

[List of Patents for class 74 subclass 340]

340

Double clutch and interposed transmission:

This subclass is indented under subclass 339. Transmissions, having a clutch at each end thereof, which are simultaneously engaged or disengaged to simultaneously engage the transmission as a unit with or disengage it from the engine and the propeller shaft.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, subclasses 48.1+ for plural clutch-assemblages and synchromesh mechanism associated therewith.

	Interchangeably locked, Longitudinally slidable:
	This subclass is indented under subclass 325. Transmissions wherein one or more gears may be moved along the axis of rotation into mesh with cooperating gears.

[List of Patents for class 74 subclass 341]

341

With tumbler gear:

Transmissions under Longitudinally slidable composed of multiple spur gears on a tumbler carrier for cooperating with different sized driving and driven gears.

SEE OR SEARCH THIS CLASS, SUBCLASS:

348+,

for longitudinally slidable bevel gears in cone form mounted on a tumbler carrier.

SEE OR SEARCH CLASS:

82,	Turning, subclasses 140 , 143 and 905, for change speed gearing used in lathes.
408,	Cutting by Use of Rotating Axially Moving Tool, subclasses 124+ , for drilling machines including drive structure.
409,	Gear Cutting, Milling, or Planing, subclasses 64+ for a milling machine including drive structure.

342	Selective:
	Transmissions under Longitudinally slidable composed of selective, multiple, sliding spur gears on a plurality of shafts.

343	Direct clutch and drive:
	This subclass is indented under subclass 342. Transmissions, but having means to directly clutch the drive and driven shafts together.

[List of Patents for class 74 subclass 344]

344

Progressive:

Transmissions under Longitudinally slidable composed of multiple sliding spur gears on a plurality of shafts, which gears may be shifted manually to provide a progressive plurality of speeds.

SEE OR SEARCH THIS CLASS, SUBCLASS:

337.5,

for cam operated controls for interchangeably locked gearing.

345	Direct clutch and drive:
	This subclass is indented under subclass 344. Transmissions, but which have means to directly clutch together the drive and driven shafts.

[List of Patents for class 74 subclass 346]

346

Fluid operated:

Transmissions under Longitudinally slidable containing a plurality of slidable spur gears which are adapted to be shifted into and out of engagement by fluid pressure means under manual control.

SEE OR SEARCH THIS CLASS, SUBCLASS:

334,	for preselected combined clutch and gear, interchangeably locked gearing.
336+,	for automatic speed responsive interchangeably locked gearing.

347	Multiple bevel gears:
	Transmissions under Longitudinally slidable composed of a plurality of slidable bevel gears which may mesh with a disk or with other bevel gears.

[List of Patents for class 74 subclass 348]

348

Tumbler and cone:

Transmissions under Longitudinally slidable comprising a plurality of spur gears of varying diameters arranged on a single shaft in cone form, and a single slidable spur tumbler gear adapted to be progressively slid into mesh with the gears of the cone whereby either the tumbler, or any one of the cone gears, may be driven by the other in mesh therewith.

(1) Note. The teeth on the cone gears may be radially or spirally disposed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

341,	for tumbler type spur gears longitudable slidable.

349	Multiple cone:
	This subclass is indented under subclass 348. Transmissions in which a plurality of cone type gears are used and the single slidable tumbler gear is interposed between the cone type gears and acts to transmit power from one to the other.

[List of Patents for class 74 subclass 350]

350

Single bevel gear:

Transmissions under Longitudinally slidable in which there is a single slidable bevel gear in mesh with a toothed disk, or one of a plurality of bevel gears for changing the speed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

347,	for multiple bevel gears which are longitudinally slidable.

[List of Patents for class 74 subclass 351]

351

Pin or crown gears:

Transmissions under Longitudinally slidable in which pin or crown gears, either single or multiple, are shifted to provide a change of speed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

415,	for the construction of the pin gear, per se.

352	Laterally slidable gears:
	This subclass is indented under subclass 325. Transmissions wherein the gears are supported by a shiftable carrier whereby the gears may be moved laterally with respect to the longitudinal axis of the transmission into mesh with cooperating gears.

353	Rotary carriage:
	This subclass is indented under subclass 352. Transmissions wherein the gears are supported by a rotary carrier and are adapted to be moved laterally into mesh with cooperating gears.

354	Swinging carriage:
	This subclass is indented under subclass 352. Transmissions wherein the gears are supported by a swingable carrier and are adapted to be moved laterally into mesh with cooperating gears.

355	Single forward and reverse speeds:
	This subclass is indented under subclass 325. Transmissions wherein a single forward or a single reverse speed is obtained by means of slidable toothed gears of any type.

356	Alternative clutch shaft:
	This subclass is indented under subclass 325. Transmissions composed of a single shiftable driving shaft which can be progressively or selectively clutched to any one of a plurality of intermediate shafts or counter shafts, which in turn are connected by constant mesh gearing to a final driven shaft, the drive shaft and the intermediate shafts or counter shafts being provided with cooperating clutch faces.

[List of Patents for class 74 subclass 357]

357

Progressive:

This subclass is indented under subclass 325. Transmissions wherein there are a plurality of slidable keys or clutches splined to a plurality of shafts which are connected to each other by constant mesh gears revoluble on the shafts, and provided with clutch elements adapted to be engaged by the slidable clutches or keys, the keys or clutches being manually shifted in a manner to provide a progressive change in gear ratio.

SEE OR SEARCH THIS CLASS, SUBCLASS:

337.5,	for cam operated controls for interchangeable locked gearing.
363,	for progressive transmissions utilizing a single clutch shaft.

358	Keys simultaneously slidable:
	This subclass is indented under subclass 357. Transmissions, wherein the slidable keys or clutches are manually operated simultaneously to provide progressive changes in gear ratios.

[List of Patents for class 74 subclass 359]

359

Selective:

This subclass is indented under subclass 325. Transmissions wherein there are a plurality of slidable keys or clutches splined to a plurality of shafts which are connected to each other by constant mesh gears revoluble on the shafts, and provided with clutch elements adapted to be engaged by the slidable clutches or keys, the slidable keys or clutches being manually shifted to provide selected changes in gear ratios.

SEE OR SEARCH THIS CLASS, SUBCLASS:

373+,

for selective, single clutch shaft, interchangeably locked gearing.

360	Multiple forward and reverse:
	This subclass is indented under subclass 325. Transmissions wherein there are a plurality of manually operable slidable keys or clutches splined to a plurality of shafts which are connected to each other by constant mesh gears revoluble on the shafts, the gears being provided with clutch elements adapted to be engaged by the slidable clutches or keys to provide a plurality of selective forward speeds and a plurality of reverse speeds.

361	Single forward and reverse:
	This subclass is indented under subclass 325. Transmissions wherein there are a plurality of manually operable slidable keys or clutches splined to a plurality of shafts which are connected to each other by constant mesh gears, revoluble on the shafts, the gears being provided with clutch elements adapted to be engaged by the slidable clutches or keys to provide a single forward speed and a single reverse speed.

362	Multiple key:
	This subclass is indented under subclass 325. Transmissions where there are a plurality of manually operable slidable keys or clutches splined to a single clutch shaft, the clutch shaft being connected to the other shafts of the transmission by constant mesh gears revoluble on the shafts, which shafts have clutch elements adapted to be engaged by the slidable keys or clutches to provide progressive change in gear ratios.

[List of Patents for class 74 subclass 363]

363

Spur:

This subclass is indented under subclass 362. Transmissions, in which the rotatable constantly meshed gears are of the spur type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

336+,	for automatically controlled interchangeably locked gearing.
337,	for torque responsive interchangeably locked gearing.

[List of Patents for class 74 subclass 364]

364

Fluid operated:

This subclass is indented under subclass 363. Transmissions, in which the clutches or keys are shifted by manually controlled fluid operated means, or the clutches are of the fluid type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

334,	for preselector type combined clutch and gear, interchangeably locked gearing.
346,	for fluid operated longitudinally slidable interchangeably locked gearing.
730,	and see (1) Note thereto for the distinction between a fluid clutch and a fluid drive.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, subclasses 48.601+ and 85.01+ for fluid pressure operated clutches.

[List of Patents for class 74 subclass 365]

365

Electrically operated:

This subclass is indented under subclass 363. Transmissions, where the clutches or keys are shifted by manually controlled electrically operated means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

334,	for preselector type combined clutch and gear, interchangeably locked gearing.
336.5,	for governor controlled interchangeably locked gearing.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, subclasses 40 and 84.1+, for electrically controlled clutches.

[List of Patents for class 74 subclass 366]

366

Single key:

This subclass is indented under subclass 325. Transmissions wherein there are constant mesh gears, some of which are rotatably mounted on a shaft and adapted to be clutched to the shaft by a single clutch or key which is manually shifted to provide progressive changes in gear ratio.

SEE OR SEARCH THIS CLASS, SUBCLASS:

337.5,

for cam operated controls for interchangeably locked gears.

[List of Patents for class 74 subclass 368]

368

Clutch and ratchet:

This subclass is indented under subclass 366. Transmissions comprising a gear train connecting driving and driven shafts and a manually operable positive clutch for directly connecting the shafts, together with a one-way clutch in the gear train which acts like a ratchet mechanism which permits the gear train to overrun when the shafts are directly coupled together.

SEE OR SEARCH THIS CLASS, SUBCLASS:

336+,	for automatically controlled interchangeably locked gears.
337,	for torque responsive interchangeably locked gears.

[List of Patents for class 74 subclass 369]

369

Spur gears:

This subclass is indented under subclass 366. Transmissions, wherein the gears of the transmission are spur gears.

SEE OR SEARCH THIS CLASS, SUBCLASS:

363,	for progressive transmissions utilizing a single clutch shaft.

[List of Patents for class 74 subclass 370]

370

Intermediate clutch:

This subclass is indented under subclass 369. Transmissions, providing two speeds only, wherein constant mesh spur gears connect the drive and driven shafts, the gears being loosely mounted on the shafts and being adapted to be connected to their respective shafts by a single manually operable slidable key or clutch intermediate the loosely mounted gears.

SEE OR SEARCH THIS CLASS, SUBCLASS:

368,	for clutch and ratchet, and single key, single clutch shaft, progressive interchangeably locked gearing.
377,	for spur type, single forward and reverse, single clutch shaft, interchangeably locked gearing.

[List of Patents for class 74 subclass 371]

371

Sliding clutch carrier:

This subclass is indented under subclass 369. Transmissions comprising a plurality of spur gears loosely mounted on a hollow shaft, the gears meshing with cooperating spur gears fixed to a second shaft, and also comprising a member slidably mounted in the hollow shaft, which member carries a single clutch element, the latter of which is manually shiftable to progressively and successively clutch the loose gears to the shaft on which they are mounted.

SEE OR SEARCH THIS CLASS, SUBCLASS:

336+,	for automatically controlled interchangeably locked gearing.
336.5,	for governor controlled interchangeably locked gears.
372,	for spur gear, sliding clutch operator, single key, single clutch shaft progressive interchangeably locked gearing.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, subclasses 52.1+ , for progressive engaging clutches and subclasses 65 and 66.1+ for axially engaging clutches.

372	Sliding clutch operator:
	This subclass is indented under subclass 369. Transmissions comprising a plurality of spur gears loosely mounted on a hollow shaft, the gears meshing with cooperating spur gears fixed to a second shaft, and also comprising a member slidably mounted in the hollow shaft, the gears carrying clutches and the slidable member carrying means for operating the clutches to progressively connect any one of the gears to its shaft.

[List of Patents for class 74 subclass 373]

373

Selective:

This subclass is indented under subclass 325. Transmissions wherein there are a plurality of manually operable slidable keys or clutches splined to a single shaft which are connected to each other by constant mesh gears, revoluble on the shafts, the gears being provided with a single key to selectively connect certain of the gears to their respective shafts.

SEE OR SEARCH THIS CLASS, SUBCLASS:

359,	for selective, multiple clutch shaft, slidable key or clutch type interchangeably locked gearing.
366+,	for single key, single clutch shaft, slidable key or clutch type interchangeably locked gearing.

[List of Patents for class 74 subclass 374]

374

Multiple key:

This subclass is indented under subclass 373. Transmissions, but provided with constantly meshed gears, some of which are loosely mounted on the same shaft and wherein manually operable keys are provided for connecting a selected one of the gears to its shaft.

SEE OR SEARCH THIS CLASS, SUBCLASS:

362,	for progressive, multiple key, single clutch shaft, slidable key or clutch type interchangeably locked gearing.

[List of Patents for class 74 subclass 375]

375

Spur gears:

This subclass is indented under subclass 374. Transmissions wherein the gears of the transmission are spur gears.

SEE OR SEARCH THIS CLASS, SUBCLASS:

359,	for selective, multiple clutch shaft, slidable key or clutch type interchangeably locked gearing.
363,	for progressive transmissions utilizing a single clutch shaft.
369+,	for spur gear type, single key, single clutch shaft progressive, slidable clutch or key, interchangeably locked gearing.

[List of Patents for class 74 subclass 376]

376

Single speed forward and reverse:

This subclass is indented under subclass 325. Miscellaneous transmissions comprising combinations of spur gears with either pulleys and belts or chains and sprockets and provided with manually operable slidable clutches mounted on a single shaft for clutching either the pulleys, the sprockets, or the gears thereto in order to provide either a single forward or a single reverse speed.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, subclass 21 , for reversing, gear controlled clutches.
474,	Endless Belt Power Transmission Systems or Components, appropriate subclasses for a belt and pulley drive system.

377	Spur gears:
	This subclass is indented under subclass 376. Transmissions having spur gears in constant mesh, certain of which are rotatable on a shaft and are adapted to be connected to the shaft by manually operated shiftable clutches.

[List of Patents for class 74 subclass 378]

378

Bevel gears:

This subclass is indented under subclass 376. Transmissions wherein a bevel driving gear is in constant mesh with a plurality of driven bevel gears, loosely mounted on the driven shaft with a manually operated slidable clutch for connecting either of the loosely mounted gears to its shaft and wherein the drive shaft is at an angle to the driven shaft.

SEE OR SEARCH THIS CLASS, SUBCLASS:

17,	for washer and wringer mechanisms.
385+,	for pivotally supported bevel gearing.

379	Bevel and idler gears:
	This subclass is indented under subclass 376. Transmissions wherein a bevel driving gear is in constant mesh with a plurality of driven bevel gears, loosely mounted on the driven shaft with a manually operated slidable clutch for connecting either of the loosely mounted gears to its shaft and wherein the drive and driven shafts are in alignment, and the common bevel gear, which is in mesh with both loose gears, acts as an idler to reverse the drive.

[List of Patents for class 74 subclass 380]

380

Pivotally supported:

This subclass is indented under subclass 640. Gearing mounted on a pivotal support to permit the driving and driven gears of a gear train to be pivotally moved relative to each other in a single plane without permitting a change of speed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

17,	for washer and wringer mechanisms.
353,	and 354, for pivoted carriage type interchangeably locked gearing.

SEE OR SEARCH CLASS:

464,	Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts, appropriate subclasses for a coupling between a shaft and a driven member which facilitates relative movement of the shaft with respect to the member.
474,	Endless Belt Power Transmission Systems or Components, particularly subclasses 58+ for a belt and pulley drive system wherein an output pulley is selectively shiftable to different power output locations relative to an input pulley.

381	Windmill turntable:
	This subclass is indented under subclass 380. Gearing of the windmill type.

383	Screw:
	This subclass is indented under subclass 380. Screw gearing,

384	Spur:
	This subclass is indented under subclass 380. Spur gearing.

[List of Patents for class 74 subclass 385]

385

Bevel:

This subclass is indented under subclass 380. Bevel gearing.

SEE OR SEARCH THIS CLASS, SUBCLASS:

17,	for washer and wringer mechanisms.
378,	and 379, for other bevel gearing of the interchangeably locked type.

[List of Patents for class 74 subclass 386]

386

Wheel type:

This subclass is indented under subclass 385. Bevel gearing associated with the wheels of a vehicle.

SEE OR SEARCH CLASS:

180,

Motor Vehicles, subclasses 260+ for a motor vehicle having at least one wheel which is both driven and steerable and wherein the steerable wheel is of the stub-axle type and further wherein is included a flexible, axially rotatable means having one portion fixed to the vehicle and another portion pivotable with the steerable wheel for transmitting drive to the wheel, and additionally wherein the pivotable portion of the means includes a gear element of an intermeshing gear type universal joint, which joint may include gears of the bevel type.

[List of Patents for class 74 subclass 387]

387

Wringer type:

This subclass is indented under subclass 385. Bevel gearing associated with the wringer of a washing machine.

SEE OR SEARCH THIS CLASS, SUBCLASS:

17,	for washer and wringer mechanisms.

SEE OR SEARCH CLASS:

68,	Textiles: Fluid Treating Apparatus, subclass 269 , for gearing for wringers.

[List of Patents for class 74 subclass 388]

388

Follow-up mechanism:

This subclass is indented under subclass 640. Gearing provided with means whereby in response to actuation of one of its elements the movement of such element is continued or augmented by some other means.

SEE OR SEARCH CLASS:

91,

Motors: Expansible Chamber Type, appropriate subclasses for the combination of an expansible chamber motor operating gearing which is included as part of the power output means of the motor, particularly subclasses 358+ for feedback control mechanisms, many of which include gearing interconnecting the motor control and power output means. For a statement of the line between Classes 74 and 91, see References to Other Classes of the Class 91 definition.

180,

Motor Vehicles, subclasses 6.2+ , for gearing organizations enabling steering by driving.

[List of Patents for class 74 subclass 390]

390

Eccentric driving shaft and axle:

This subclass is indented under subclass 640. Gearing usually for driving a motor vehicle wheel, which is mounted adjacent a wheel and in which the driving shaft is offset with respect to the driven shaft or axle.

SEE OR SEARCH CLASS:

180,	Motor Vehicles, subclasses 337+ , for transmission mechanism combined with vehicle structure.

[List of Patents for class 74 subclass 391]

391

Central driving shaft in axle:

This subclass is indented under subclass 640. Gearing usually for driving a motor vehicle wheel, which is mounted adjacent a wheel and in which the driving shaft is centrally disposed with respect to the vehicle axle.

SEE OR SEARCH CLASS:

180,	Motor Vehicles, subclasses 70+ , for transmission mechanism combined with vehicle structure.

[List of Patents for class 74 subclass 392]

392

Parallel shafts, adjustable gear mesh:

This subclass is indented under subclass 640. Gearing in which the gears are carried by parallel shafts which are movable from or toward each other to such a limited extent that the gears always remain in engagement.

SEE OR SEARCH CLASS:

226,	Advancing Material of Indeterminate Length, appropriate subclasses for methods of, and apparatus for, feeding material without utilizing the leading or trailing ends to effect movement of the material.
271,	Sheet Feeding or Delivering, for front gage rotary conveyors.

[List of Patents for class 74 subclass 393]

393

Varying speed ratio:

This subclass is indented under subclass 640. Gearing in which the speed of the driven element is varied during each revolution.

SEE OR SEARCH CLASS:

475,	Planetary Gear Transmission Systems or Components, subclasses 14+ for cyclical or intermittent drive in planetary gearing.

[List of Patents for class 74 subclass 395]

395

Adjustable:

This subclass is indented under subclass 640. Gearing in which one of the elements is adjustable relatively to bring it into adjusted relationship with another.

SEE OR SEARCH CLASS:

73,	Measuring and Testing, subclass 507 , for a differential speed responsive device.
248,	Supports, subclasses 646+ , for adjustable supports, for motors, engines, etc., even though disclosed as adjustable for the purpose of engaging two gears.
318,	Electricity: Motive Power Systems, subclasses 41+ , for electrical synchronizing systems.
352,	Optics: Motion Pictures, subclasses 12+ for synchronization of sound and picture in motion picture apparatus; subclass 33 for adjustable mechanical drive between a phonograph and a motion picture device to permit relative position adjustment between the two devices; and subclasses 160+ for adjustable drive connection between the shutter and feed of a motion picture device.
355,	Photocopying, subclasses 103 and 108+, for continuous contact film printing.
399,	Electrophotography, subclasses 75+ for machine operations of an electrophotography device and subclasses 107+ for particular structure of the device, specifically subclasses 110+ for modular or displaceable components.

[List of Patents for class 74 subclass 396]

396

Relative movable axes:

This subclass is indented under subclass 395. Gearing, in which either gear or shaft is adapted to be moved for the purpose of adjustment.

SEE OR SEARCH CLASS:

248,	Supports, subclasses 646+ , for adjustable machine supports, per se.
474,	Endless Belt Power Transmission Systems or Components, particularly subclasses 101+ for structure wherein a shaft carrying a pulley or guide roll is shiftable such as for increasing belt tension.
476,	Friction Gear Transmission Systems or Components, subclass 64 for a friction gear on the shaft of a movably mounted motor.

[List of Patents for class 74 subclass 397]

397

Parallel shafts:

This subclass is indented under subclass 396. Gearing, in which the gear shafts are parallel.

SEE OR SEARCH CLASS:

384,	Bearings, subclasses 252+ for a plain bearing with an adjustable support.

398	Automatic control:
	This subclass is indented under subclass 396. Gearing in which the gears or gear shafts are adjustable by automatic means.

399	Parallel shafts:
	This subclass is indented under subclass 398. Gearing, the gears or gear shafts being parallel to each other.

400	Fixed axes:
	This subclass is indented under subclass 395. Gearing, in which one of the elements is adapted to be moved manually in the direction along its axis for the purpose of adjustment.

401	Parallel shafts:
	This subclass is indented under subclass 400. Gearing, the gear shafts being parallel to each other.

402	Automatic control:
	This subclass is indented under subclass 400. Gearing, gear shafts being adjusted by automatic means.

403	Parallel shafts:
	This subclass is indented under subclass 402. Gearing, the gear shafts being parallel to each other.

[List of Patents for class 74 subclass 404]

404

Reversing means:

This subclass is indented under subclass 640. Miscellaneous gearing in which the direction of rotation of the driven shaft is reversible and in which there is no change of speed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

360,	and 361, for forward and reverse, multiple clutch shaft slidable key or clutch type interchangeably locked gearing.
376+,	for forward and reverse, single clutch shaft, slidable key or clutch type interchangeably locked gearing.

SEE OR SEARCH CLASS:

409,	Gear Cutting, Milling, or Planing, subclass 336 for a planer reversing mechanism.

404.5

Governor control:

This subclass is indented under subclass 404. Gearing, in which there is no change of speed, in which the direction of rotation of the driven shaft is reversible, and in which the change of direction is controlled by a governor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

336.5,

for governor-controlled change-speed gearing.

[List of Patents for class 74 subclass 405]

405

Disconnecting means:

This subclass is indented under subclass 640. Miscellaneous gearing provided with means for disconnecting the gear train.

SEE OR SEARCH THIS CLASS, SUBCLASS:

325+,

for mechanisms for connecting and disconnecting gears for use in connection with change-speed interchangeably locked transmission gearing.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, appropriate subclasses for clutches, per se.

[List of Patents for class 74 subclass 406]

406

Displaceable elements:

This subclass is indented under subclass 640. Gearing in which one of the elements moves linearly or angularly about a center other than the axis of rotation of the gear.

SEE OR SEARCH THIS CLASS, SUBCLASS:

27+,	for reciprocating carriage motions.
31,	through 35, for displaceable elements in rack and pinion gearing.
424.6,	for spiral gear driven rack or shaft type gearing.

SEE OR SEARCH CLASS:

366,	Agitating, subclasses 252+ and 283+ for agitators with a gear driven rotatable stirrer.

[List of Patents for class 74 subclass 409]

409

Backlash take-up:

This subclass is indented under subclass 640. Gear trains provided with means to eliminate backlash in some element of the combination.

SEE OR SEARCH THIS CLASS, SUBCLASS:

440+,

for backlash takeup for sectional rotary bodies used in gearing.

SEE OR SEARCH CLASS:

409,	Gear Cutting, Milling, or Planing, subclass 146 for a device for removing backlash or wear from a screw feeding mechanism in a gear cutting machine.

[List of Patents for class 74 subclass 410]

410

Pressure distributing:

This subclass is indented under subclass 640. Gear trains provided with means by which the pressure of the teeth of one unit is compensated for by that of another unit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

427,	for pressure distributing means for worm gearing.

[List of Patents for class 74 subclass 411]

411

Yieldability in gear trains:

This subclass is indented under subclass 640. Gearing having one element provided with a yielding means through which torque is transmitted.

SEE OR SEARCH CLASS:

464,	Rotary Shafts Gudgeons, Housings, and Flexible Couplings for Rotary Shafts, subclasses 51+ for a rotary shaft coupled to driven member via a flexible element.

411.5

With brake means for gearing:

This subclass is indented under subclass 640. Gearing in which means are provided to selectively stop or prevent rotation of a gearing element.

SEE OR SEARCH CLASS:

188,	Brakes, appropriate subclasses for brake means, per se.
192,	Clutches and Power-Stop Control, subclasses 215+ for combinations of joint operation and control of transmission and braking mechanisms.

[List of Patents for class 74 subclass 412]

412

Directly cooperating gears:

This subclass is indented under subclass 640. Gearing consisting of two meshed gears mounted on shafts.

(1) Note. The mountings and housings for the gears may be included in the claims.

[List of Patents for class 74 subclass 413]

413

Parallel axes or shafts:

This subclass is indented under subclass 412. Gearing, wherein the gear axes or shafts are parallel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

332,	for internal-external interchangeably locked gearing.
390,	for eccentric driving shaft and axle gearing.

414	External type:
	This subclass is indented under subclass 413. Gearing, in which all of the gears have external teeth.

[List of Patents for class 74 subclass 415]

415

Pin teeth:

This subclass is indented under subclass 414. Gearing, in which one of the gears has pin teeth.

SEE OR SEARCH THIS CLASS, SUBCLASS:

84,	for rotary to intermittent unidirectional mechanical movements.
351,	for interchangeably locked gearing having longitudinally slidable pin gears.
436,	for Geneva gears.

416	Intersecting axes:
	This subclass is indented under subclass 412. Gearing not otherwise classified, consisting of two gears in combination with a particular form of mounting, the axes thereof intersecting each other.

417	Bevel gear type:
	This subclass is indented under subclass 416. Gearing, the gears being of the bevel type.

[List of Patents for class 74 subclass 420]

420

Spur and bevel:

This subclass is indented under subclass 412. Gearing consisting of a combination of spur and of bevel gears.

SEE OR SEARCH THIS CLASS, SUBCLASS:

16,	for power table and stands.

[List of Patents for class 74 subclass 421]

421

Spur:

This subclass is indented under subclass 412. Gearing, consisting of gears of the spur type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

384,	for pivotally supported, spur type, interchangeably locked gearing.
391,	for central driving shaft in axle type gearing.
410,	for pressure distributing gearing.

[List of Patents for class 74 subclass 422]

422

Rack and pinion:

This subclass is indented under subclass 412. Gearing, the gearing embodying racks and pinions.

SEE OR SEARCH THIS CLASS, SUBCLASS:

27+,	for reciprocating carriage motions.
31,	through 35, for displaceable elements in rack and pinion gearing.
406,	for displaceable gearing.
424.5,	for spiral gearing.
842,	for rack and pinion mechanisms changing the position of a driven means "on the fly".

SEE OR SEARCH CLASS:

254,	Implements or Apparatus for Applying Pushing or Pulling Force, subclasses 95+ , 205, and 230, for rack and pinion drives for the pushing or pulling implements or apparatus.
409,	Gear Cutting, Milling, or Planing, subclass 332 for a rack drive for a planer.

[List of Patents for class 74 subclass 423]

423

Bevel:

This subclass is indented under subclass 412. Gearing of the bevel type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

347,	for interchangeably locked, longitudinally slidable, multiple, bevel type gearing.
378,	and 379, for interchangeably locked, slidable clutch, single clutch shaft, single speed forward and reverse, bevel type gearing.
385+,	for pivotally supported bevel type gearing.

SEE OR SEARCH CLASS:

475,	Planetary Gear Transmission Systems or Components, for bevel gears of planetary type.

[List of Patents for class 74 subclass 424]

424

Motor vehicle drive:

This subclass is indented under subclass 423. Gearing, in which the bevel gearing drives the differential and rear axle shafts of a motor vehicle.

SEE OR SEARCH CLASS:

475,	Planetary Gear Transmission Systems or Components, subclasses 220+ for planetary gear differentials.

424.5	Spiral:
	This subclass is indented under subclass 412. Gearings of the spiral type.

424.6	Driven rack or shaft:
	This subclass is indented under subclass 424.5. Spiral gearing, in which the driven element is a rack or chain.

424.7

Screw:

This subclass is indented under subclass 424.5. Gearing, the two gears being spiral and nonintersecting.

SEE OR SEARCH THIS CLASS, SUBCLASS:

425+,	for worm gearing.
458,	for worm teeth.

424.71

Screw and nut:

This subclass is indented under subclass 424.5. Subject matter including gearing including a rotatable element having spiral threads or grooves encircling its axis of rotation and a second element enmeshed with it for relative movement along the axis.

(1) Note. An arrangement including a shaft and another element rotating relative to each other about a longitudinal axis of the shaft are included even if either or both lack threads as long as they have structure to produce a motion equivalent to a screw and nut through the cooperation of the shaft and other element during rotation. See the search notes below.

(2) Note. An element having external threads or a collection of elements whose meshing surfaces face outwardly from the collection is considered a screw. An element having internal threads or a collection of elements whose meshing surfaces are inwardly facing relative to the collection is considered a nut.

SEE OR SEARCH THIS CLASS, SUBCLASS:

89.23,	for a mechanical movement including a screw and nut for converting motion.
424.73,	for a shaft and nut having no defined threads and relying on frictional forces between the nut and shaft to produce the equivalent effect. See (1) Note above.

424.72	Plural longitudinally variably spaced nuts:
	This subclass is indented under subclass 424.71. Subject matter including a plurality of nuts on the same screw that are moveable to permit the spacing between the nuts to change. Figure 1. A typical example of the subject matter.

424.73	Threadless:
	This subclass is indented under subclass 424.71. Subject matter in which the shaft and nut have no threads at the interface between them, i.e., power is transmitted by frictional contact. Figure 1. A typical example of the subject matter.

424.74	Non-linear screw:
	This subclass is indented under subclass 424.71. Subject matter in which a portion of the axis of the screw is curved. Figure 1. A typical example of the subject matter.

424.75	Thread geometry:
	This subclass is indented under subclass 424.71. Subject matter including particular structure or shape of the threads. Figure 1. A typical example of the subject matter.

424.76	Thread pitch varies over axial length:
	This subclass is indented under subclass 424.75. Subject matter in which the distance between successive turns of the helical threads varies from one point on the shaft to another.

424.77	Shaft thread is spirally wound wire:
	This subclass is indented under subclass 424.75. Subject matter in which the screw thread includes a wire extending along the helix of the thread.

424.78	Nut disengageable from screw:
	This subclass is indented under subclass 424.71. Subject matter in which the nut is constructed to be readily moved out of contact with the screw. Figure 1. A typical example of the subject matter.

424.79

Nut segments hinged parallel to shaft (e.g., clam shell-type, etc.):

This subclass is indented under subclass 424.78. Subject matter in which the nut includes two portions joined together so as to be pivotable relative to each other along an axis that is generally parallel with the axis of relative rotation of the nut and screw when the nut is in operable engagement with the screw.

(1) Note. The nut portions may be moveable in use or, more typically, only for disassembly.

Image 1 for class 74 subclass 424.79

Figure 1. A typical example of the subject matter.

424.81	Rolling element engaging thread:
	This subclass is indented under subclass 424.71. Subject matter including an element between the screw and nut that engages and rolls in the threads of the screw and nut to effect the meshing of the threads.

424.82	Recirculating rolling elements:
	This subclass is indented under subclass 424.81. Subject matter including elements between the screw and nut that engage and roll in the threads of the screw and nut to effect the meshing of the threads, the elements traveling along a closed loop path, a portion of which is outside of the screw nut interface and not in meshing force transmitting relationship with the screw and nut. Figure 1. A typical example of the subject matter.

424.83	Plural independent recirculating element paths:
	This subclass is indented under subclass 424.82. Subject matter including additional elements that roll in the threads of the screw and nut and travel along a second closed loop path, the paths having substantially no portions in common.

424.84	Single thread common to plural paths:
	This subclass is indented under subclass 424.82. Subject matter in which portions of each of the two closed loop paths lie in different portions of the same screw or nut thread.

424.85	Roller return path in shaft:
	This subclass is indented under subclass 424.82. Subject matter in which a portion of the closed loop path is located within the body of the screw. Figure 1. A typical example of the subject matter.

424.86	Return path geometry:
	This subclass is indented under subclass 424.82. Subject matter including particular structure for guiding the rolling elements along the portion of the path that is not in meshing engagement with the screw and nut threads (i.e., outside the screw nut interface).

424.87	Rolling element deflector:
	This subclass is indented under subclass 424.86. Subject matter including particular structure for directing the rolling elements between the portions of the paths that lie inside and outside the screw nut interface.

424.88	Interconnected or cooperating rollers or roller structure:
	This subclass is indented under subclass 424.82. Subject matter in which (1) at least two of the roller elements are connected or cooperate in a manner involving other than mere pushing contact or (2) including the particular shape or construction of an individual roller element.

424.89	Non-recirculating rolling elements:
	This subclass is indented under subclass 424.81. Subject matter including elements between the screw and nut that engage and roll in the threads of the screw and nut to effect the meshing of the threads, the elements being held in at least one thread at all times during operation.

424.9	Captured sphere:
	This subclass is indented under subclass 424.89. Subject matter in which the rolling elements are spherical and including means for restricting there movement so as to prevent engagement with one another.

424.91	Cylindrical or quasi-cylindrical roller element (e.g., inclined roller, etc.):
	This subclass is indented under subclass 424.89. Subject matter in which the rolling elements are substantially cylindrical (i.e., they have a single axis of symmetry about which they roll).

424.92	Parallel to shaft:
	This subclass is indented under subclass 424.91. Subject matter in which the axes of the rolling elements are substantially parallel to the axis of relative rotation of the screw and nut during operation.

424.93	Perpendicular to shaft:
	This subclass is indented under subclass 424.91. Subject matter in which the axes of the rolling elements are substantially perpendicular to the axis of relative rotation of the screw and nut (i.e., tangent to a cylinder centered on the axis) during operation.

424.94	Less than 360 degrees of contact between nut and screw:
	This subclass is indented under subclass 424.71. Subject matter in which the screw and nut engage over an arc that totals substantially less than 360 degrees. Figure 1. A typical example of the subject matter.

424.95	Independent nut segments:
	This subclass is indented under subclass 424.94. Subject matter in which the nut includes a plurality of relatively moveable threaded portions each engaging the screw. Figure 1. A typical example of the subject matter.

424.96	Integral deformable tangs engaging screw:
	This subclass is indented under subclass 424.95. Subject matter in which the relatively moveable threaded portions of the nut are integrally connected by means including a flexible member. Figure 1. A typical example of the subject matter.

[List of Patents for class 74 subclass 425]

425

Worm:

This subclass is indented under subclass 424.5. Gearing of the worm type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

383,	424.7, 424.71-424.96, 458, and 500, for other screw or worm gearing.
396,	for gearing having relatively movable axes.
411,	for yieldability in gear trains.
497,	for cam type motion translating steering posts.

SEE OR SEARCH CLASS:

192,	Clutches and Power-Stop Control, subclasses 56.1+ , for torque responsive clutches which release on overload.
254,	Implements or Apparatus for Applying Pushing or Pulling Force, subclasses 220 , 229, 296, and 343 for worm and worm wheel gearing operated implements or apparatus.

425.5	Variable speed:
	This subclass is indented under subclass 425. Gearing, the worm gearing being of a structure to impart a variable speed to the driven member.

[List of Patents for class 74 subclass 426]

426

Intermittent motion:

This subclass is indented under subclass 425. Gearing, the worm gearing being of a structure to impart an intermittent motion to the driven element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

84,	for rotary to intermittent unidirectional mechanical movements.
436,	for Geneva gears.

[List of Patents for class 74 subclass 427]

427

Distribution of pressure:

This subclass is indented under subclass 425. Gearing, the pressure of the teeth of one of the elements being compensated for by that of another.

SEE OR SEARCH THIS CLASS, SUBCLASS:

410,	for pressure distributing gearing in general.

431	Gear and rotary bodies:
	This subclass is indented under subclass 640. Gearing comprising a combination of a gear with a rotary body or bodies, not a gear, fixed thereto and mounted upon a common shaft.

432	Laterally-spaced wheels:
	This subclass is indented under subclass 431. Gearing, the rotary elements being laterally spaced.

433	Radially-spaced wheels:
	This subclass is indented under subclass 431. Gearing, the rotary elements being spaced radially.

433.5

With flywheel:

This subclass is indented under subclass 431. Subject matter including a motion-smoothing component generally made up of a massive disk-like member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

572.2,

for motion smoothing flywheel.

[List of Patents for class 74 subclass 434]

434

Rotary bodies:

This subclass is indented under subclass 640. Gearing comprising structure and details of rotary bodies, per se, constituting gearing elements.

SEE OR SEARCH CLASS:

428,	Stock Material or Miscellaneous Articles, subclass 550 for composite stock material containing metal particles which has porous component, subclass 579 for a metallic intermediate article in the form of a disk.
474,	Endless Belt Power Transmission Systems or Components, particularly subclasses 152+ for a positive drive pulley; and subclasses 166+ for a friction drive pulley.

435	Mutilated:
	This subclass is indented under subclass 434. Inventions, having teeth which extend only partially around the periphery, producing upon rotation an intermittent drive.

[List of Patents for class 74 subclass 436]

436

Geneva:

This subclass is indented under subclass 434. Gearing, of the star-wheel type adapted to give intermittent rotation to a driven element during each revolution thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

84,	for rotary to intermittent unidirectional mechanical movements.
415,	for pin toothed external type gearing.

SEE OR SEARCH CLASS:

352,	Optics: Motion Pictures, subclass 189 for motion picture sprockets intermittently driven by a star gear.

437	Irregular teeth and bodies:
	This subclass is indented under subclass 434. Devices, having peripheries of noncircular form or irregularly shaped teeth, or both.

438	External and internal teeth:
	This subclass is indented under subclass 434. Devices, provided with teeth both on the inner and outer periphery.

439	Sectional:
	This subclass is indented under subclass 434. Gears, which are made up of a plurality of sections.

[List of Patents for class 74 subclass 440]

440

Backlash take-up:

This subclass is indented under subclass 439. Devices, provided with means for the elimination of backlash.

SEE OR SEARCH THIS CLASS, SUBCLASS:

409,	for backlash takeup for gearing in general.

441	Screw and nut:
	This subclass is indented under subclass 440. Devices, the gears being of the screw and nut type.

[List of Patents for class 74 subclass 443]

443

Sound deadening:

This subclass is indented under subclass 439. Gears including means for deadening sound in operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

445,	for multiple disk rotary bodies.

SEE OR SEARCH CLASS:

464,	Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts, subclasses 51+ for a flexible connection between a shaft and a member driven by the shaft.

[List of Patents for class 74 subclass 444]

444

Differential disks:

This subclass is indented under subclass 439. Gears mounted upon a single shaft and connected thereto by means which permits of a differential action between them.

SEE OR SEARCH CLASS:

475,	Planetary Gear Transmission Systems or Components, subclasses 220+ for planetary gear differentials.

[List of Patents for class 74 subclass 445]

445

Multiple disks:

This subclass is indented under subclass 439. Devices, made up of laminations.

SEE OR SEARCH CLASS:

156,	Adhesive Bonding and Miscellaneous Chemical Manufacture, appropriate subclasses for laminating processes for making gears.

[List of Patents for class 74 subclass 446]

446

Separate rim:

This subclass is indented under subclass 439. Bodies, having separate rims and webs.

SEE OR SEARCH THIS CLASS, SUBCLASS:

448,	for bodies having segmental rims.

447	Detachable:
	This subclass is indented under subclass 446. Bodies, having the rim secured to the web by means permitting the detachment of the rim.

[List of Patents for class 74 subclass 448]

448

Segmental rim:

This subclass is indented under subclass 439. Bodies, having rims made up of a plurality of segments.

SEE OR SEARCH THIS CLASS, SUBCLASS:

446+,

for bodies having separable rims.

[List of Patents for class 74 subclass 449]

449

Sheet metal:

This subclass is indented under subclass 439. Bodies, fabricated wholly or in part of sheet metal.

SEE OR SEARCH CLASS:

301,	Land Vehicles: Wheels and Axles, subclasses 5.1+ , for wheels.

450	Diametrically split:
	This subclass is indented under subclass 439. Gears, in which the line of division between the sections occurs along a diameter.

451	Shaft-admitting insert:
	This subclass is indented under subclass 439. Gears, provided with removable inserts whereby the shafts may be removed laterally through the opening occurred by the inserts.

457	Teeth:
	This subclass is indented under subclass 640. Subcombinations comprising the gear teeth of meshing gears.

[List of Patents for class 74 subclass 458]

458

Worm and helical:

This subclass is indented under subclass 457. Devices directed to the structure and details of worm and helical gear teeth.

SEE OR SEARCH THIS CLASS, SUBCLASS:

424.7,	425+ and 500, for other screw and worm gearing.
497,	for cam type motion transmitting steering gear.

459.5	Bevel:
	This subclass is indented under subclass 457. Devices comprising bevel teeth.

460	Spur:
	This subclass is indented under subclass 457. Devices comprising spur teeth.

461	Yieldable:
	This subclass is indented under subclass 460. Devices wherein the spur teeth are combined with yieldable elements.

462	Form:
	This subclass is indented under subclass 460. Devices wherein the spur teeth are of a modified tooth form.

464	Antifriction:
	This subclass is indented under subclass 462. Devices, in which the teeth embody antifriction means.

[List of Patents for class 74 subclass 465]

465

Roller:

This subclass is indented under subclass 464. Devices, in which the teeth are provided with or operate against rollers.

SEE OR SEARCH THIS CLASS, SUBCLASS:

497,	for cam type, motion transmitting steering gear.
500,	for worm type, motion transmitting steering gear.

466	Twisted:
	This subclass is indented under subclass 462. Devices, in which the teeth are twisted.

[List of Patents for class 74 subclass 467]

467

Lubrication:

This subclass is indented under subclass 640. Gears specifically modified for purposes of lubrication.

SEE OR SEARCH CLASS:

184,	Lubrication, subclasses 6+ , for lubricating systems and particularly subclasses 11.1+ for splash systems.
475,	Planetary Gear Transmission Systems or Components, subclasses 159+ for lubrication associated with planetary gear transmission.

[List of Patents for class 74 subclass 468]

468

Teeth:

This subclass is indented under subclass 467. Gearing having teeth specifically modified for purposes of lubrication.

SEE OR SEARCH THIS CLASS, SUBCLASS:

2,	3, and 4, for automatic operation of control.

[List of Patents for class 74 subclass 469]

469

CONTROL LEVER AND LINKAGE SYSTEMS:

This subclass is indented under the class definition. Mechanisms which are made up of (1) such links as cranks, levers and rods, with turning and sliding pairs, and (2) links consisting of bodies which have two or more rigid elements, which links may be connected to other bodies for the purpose of transmitting force or motion, not otherwise classified.

(1) Note. By pairs is meant two rigid bodies movably connected together so that the relative motion between them is of a definite character.

(2) Note. Such linkages are normally manually operated and used for controlling some device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

20,	through 169, for mechanical movements.

SEE OR SEARCH CLASS:

901,	Robots, subcollections 27+ for lever and linkage systems which make up a robot arm.

470	Resilient connections:
	This subclass is indented under subclass 469. Systems which have a resilient member as one of the elements.

[List of Patents for class 74 subclass 471]

471

Multiple controlled elements:

This subclass is indented under subclass 469. Systems in which there is a single control element which selectively operates a plurality of controlled elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

480,	for interconnected multiple controlling systems.

SEE OR SEARCH CLASS:

477,	Interrelated Power Delivery Controls, Including Engine Control, for an element to control both a transmission and an engine.

473.1

Transmission control:

This subclass is indented under subclass 471. Multiple controlled elements for manually controlling an assembly of gears or associated parts for the transfer of power from a prime mover to a driving or propelling means.

(1) Note. When the control system is claimed in combination with the transmission, the patent is classified with the transmission. See the appropriate transmission class.

SEE OR SEARCH THIS CLASS, SUBCLASS:

25+,	for mechanical movements for converting rotary motion to or from reciprocating or oscillating motion.
334,	for preselector type combined clutch and gear, interchangeably locked gearing.
337.5,	for a cam-operated transmission control.
365,	for an electrical transmission control system.
470,	for resilient joints in a lever system.

SEE OR SEARCH CLASS:

477,	Interrelated Power Delivery Controls, Including Engine Control, subclasses 34+ for transmission control and 125+ for a means to prohibit the changing of the speed ratio of the gear transmission when such change may harm the engine or gear transmission.
701,	Data Processing: Vehicles, Navigation, and Relative Location, subclasses 51 through 66for a computer controlled transmission.

473.11

Fluid actuator:

This subclass is indented under subclass 473.1. Transmission control wherein the operation or engagement of a multiple controlled transmission element is initialized by a fluid means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

346,	for longitudinally slidable gearing containing a plurality of slidable spur gears which are adapted to be shifted into and out of engagement by fluid pressure means under manual control.
364,	for a clutch or key shifted by manually controlled fluid operated means, or a fluid-type clutch.
655,	for a fluid drive mechanism included as part of an intermediate internal mechanism of a single gearing unit.
718,	for a fluid drive in which alternate plural power paths to or from a gearing assembly is divided or combined.
730.1+,	for gearing combined with a fluid force torque transmitting device to form a drive train.

SEE OR SEARCH CLASS:

477,	Interrelated Power Delivery Controls, Including Engine Control, subclasses 52+ for the combination of a hydraulic or pneumatic torque transmitting means and a gear transmission, interrelated with control of the engine.

473.12	Electrical actuator:
	This subclass is indented under subclass 473.1. Transmission control wherein the operation or engagement of a multiple controlled transmission element is initialized by an electrical pulse or current.

473.13

Occupant propelled vehicle:

This subclass is indented under subclass 473.1. Transmission control wherein the multiple controlled transmission elements are in a vehicle moved via the action of a rider or occupant of the vehicle.

SEE OR SEARCH CLASS:

280,	Land Vehicles, subclasses 7.15+ , 12.1+, 200+, and 828+ for a vehicle having a means to be propelled by the occupant.
482,	Exercise Devices, subclasses 66+ for an occupant propelled support frame having movement facilitating feature for foot travel.

473.14

Transmission controlled by flexible cable:

This subclass is indented under subclass 473.13. Occupant propelled vehicle wherein the multiple controlled transmission elements are manipulated or moved by a pliable cable.

SEE OR SEARCH THIS CLASS, SUBCLASS:

500.5,

for an elongated element for transmitting force or motion from a hand to operate a device, wherein the element is formed of a flexible or pliant material or a series of pivoted links, such that the force or motion may be transmitted along a curved path.

473.15

Transmission controlled by flexible cable:

This subclass is indented under subclass 473.1. Transmission control wherein the multiple controlled transmission elements are actuated by a pliable cable.

SEE OR SEARCH THIS CLASS, SUBCLASS:

500.5,

473.16

Foot operated:

This subclass is indented under subclass 473.1. Transmission control wherein the multiple controlled element is engaged or disengaged via movement of a lever engaged by the terminal part of a human leg.

SEE OR SEARCH THIS CLASS, SUBCLASS:

478+,	for foot operated controls which selectively operate a plurality of controlled members.
481+,	for an independently operable system which may be connected and operated by a single controlling member having a foot operated control and a hand operated control.
512+,	for foot operated links connected to other bodies for the purpose of transmitting force or motion.

SEE OR SEARCH CLASS:

477,	Interrelated Power Delivery Controls, Including Engine Control, subclasses 210+ for a foot operated control of an interrelated engine and brake regulating means.

473.17	Multiple foot-operated controls:
	This subclass is indented under subclass 473.16. Foot operated control having a plurality of independent foot operated levers.

473.18	Control convertible between automatic and manual operation:
	This subclass is indented under subclass 473.1. Transmission control capable of selectively operating in a system controlled mode or an operator manipulated mode.

473.19	Control of plural mechanisms (e.g., control of transmission and control of 4 - wheel drive):
	This subclass is indented under subclass 473.1. Transmission control capable of operating more than one transmission or related mechanism.

473.2

Separate control levers:

This subclass is indented under subclass 473.19. Control of plural mechanisms having individual controls for each controlled transmission or mechanism.

SEE OR SEARCH THIS CLASS, SUBCLASS:

519+,

for control levers.

473.21

Restriction of shift, gear selection, or gear engagement:

This subclass is indented under subclass 473.1. Transmission control wherein movement of a shifting element is regulated, limited, or prohibited.

SEE OR SEARCH THIS CLASS, SUBCLASS:

325,	in which a plurality of speeds are transmitted from one shaft to another by optionally engaging or meshing selected gears or clutches or gears and clutches, to their supporting shafts.

SEE OR SEARCH CLASS:

477,	Interrelated Power Delivery Controls, Including Engine Control, subclasses 51+ wherein fluid resistance inhibits rotation of a planetary transmission element and 125+ for the prevention of an unsafe or unintentional shift.

473.22

Prevention of reverse shift:

This subclass is indented under subclass 473.21. Restricted shift, gear selection or gear engagement wherein a reverse shift, selection, or engagement is averted, impeded, or prohibited.

SEE OR SEARCH CLASS:

477,	Interrelated Power Delivery Controls, Including Engine Control, subclasses 126+ for the prevention of an unsafe or unintentional reverse shift.

473.23	Separate actuator to disengage restrictor:
	This subclass is indented under subclass 473.21. Restricted shift, gear selection or gear engagement further comprising a releasable mechanism for manually enabling the shifting, selecting, or engaging element.

473.24	Shift element interlock:
	This subclass is indented under subclass 473.21. Restricted shift, gear selection or gear engagement wherein the shifting elements are releasably interconnected.

473.25	With detent, recess, notch, or groove:
	This subclass is indented under subclass 473.24. Shift rod interlock wherein the interlock comprises a stop or checking device to hold the shifting element in a predetermined position until moved therefrom by an application of a force transmitted to the element.

473.26	Resiliently biased interlock:
	This subclass is indented under subclass 473.24. Shift rod interlock wherein the interlock is flexabily urged in a locking position.

473.27	Spherical restrictor:
	This subclass is indented under subclass 473.21. Restricted shift, gear selection, or gear engagement wherein the restrictor is generally round in three dimensional space.

473.28	Resiliently biased restrictor:
	This subclass is indented under subclass 473.21. Restricted shift, gear selection, or gear engagement wherein the restrictor is flexabily urged in a locking position.

473.29	Having vibration damper:
	This subclass is indented under subclass 473.1. Transmission control having a means to shunt frequencies generated by the transmission.

473.3	Manually operated selector (e.g., remotely controlled device, lever, push button, rotary dial, etc.):
	This subclass is indented under subclass 473.1. Transmission control wherein the transmission is manipulated by the vehicle or machine operator using a hand operated device.

473.31	Control lever on steering column:
	This subclass is indented under subclass 473.3. Manually operated selector located on the steering column of a vehicle.

473.32

Control lever movable through plural planes:

This subclass is indented under subclass 473.31. Steering column mounted control level wherein the control lever movement is not confined to a single plane.

SEE OR SEARCH THIS CLASS, SUBCLASS:

471,	a single control element which selectively operates a plurality of controlled elements.

473.33

Control lever movable through plural planes:

This subclass is indented under subclass 473.3. Hand operated selector wherein the control lever movement is not confined to a single plane.

SEE OR SEARCH THIS CLASS, SUBCLASS:

471,	a single control element which selectively operates a plurality of controlled elements.

473.34	Spherical mount (e.g., ball and socket):
	This subclass is indented under subclass 473.33. Control lever movable through plural planes wherein the control lever is mounted using a spherical portion and complementary cavity mount.

473.35	Resiliently biased control lever:
	This subclass is indented under subclass 473.34. Spherical mounted control lever wherein the control lever is resiliently biased or urged in a particular orientation.

473.36	Particular element (e.g., shift fork, template, etc.):
	This subclass is indented under subclass 473.1. Transmission control having specific structure of a transmission control element or related mechanism.

473.37	Shift fork structure:
	This subclass is indented under subclass 473.36. Particular element wherein the transmission control element or related mechanism is a shift fork.

[List of Patents for class 74 subclass 478]

478

Foot operated:

This subclass is indented under subclass 471. Systems in which there are foot operated controls which selectively operates a plurality of controlled members.

SEE OR SEARCH THIS CLASS, SUBCLASS:

473.16+,	for foot operated transmission controls.
480,	for interconnected multiple control elements.
523,	for hand control levers.

478.5

Offset extension:

This subclass is indented under subclass 478. Devices wherein there are at least two foot operated controllers for separate systems, and one of the controllers has either an extension or a remote operator attached or connected thereto and so positioned with respect to at least one other of the controllers that a single foot may be manipulated to effect operation of at least two of the controllers.

SEE OR SEARCH THIS CLASS, SUBCLASS:

480,	for devices wherein there are a plurality of systems respectively having controllers, which controllers are provided with a mechanical interconnection.

479.01	Multiple controlling elements for single controlled element:
	This subclass is indented under subclass 469. Systems in which there are a plurality of controlling elements providing input to control a single element output.

[List of Patents for class 74 subclass 480]

480

Interconnected:

This subclass is indented under subclass 479. Systems in which there are a plurality of independently operable systems which may be connected and operated by a single controlling member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

473.16+,	for foot operated transmission controls.
494,	for combined steering posts with auxiliary operators thereon.
562+,	for pedals having additional foot engaging portions.

[List of Patents for class 74 subclass 481]

481

Hand and foot:

This subclass is indented under subclass 480. Systems, when one control is a foot operated member and the other a hand operated member.

SEE OR SEARCH CLASS:

188,	Brakes, subclass 106 , for brakes which are operated by both hand and foot controls.

[List of Patents for class 74 subclass 482]

482

Accelerator:

This subclass is indented under subclass 481. Systems, for controlling a carburetor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

513,	for foot operated accelerators, per se.

[List of Patents for class 74 subclass 483]

483

Interlocked:

This subclass is indented under subclass 479. Systems located between and cooperating with elements of a plurality of control lever and linkage systems which prevent the simultaneous operation of the control systems, and permit the operation of only one control system at a time.

SEE OR SEARCH THIS CLASS, SUBCLASS:

473.24+,

for interlocked multiple controlled elements.

SEE OR SEARCH CLASS:

246,	Railway Switches and Signals, subclasses 131+ , for interlocking switches and signals.

484	Steering and controls assemblies:
	This subclass is indented under subclass 479. Systems where the controlling elements are grouped around a steering post.

[List of Patents for class 74 subclass 485]

485

Rotary control shaft:

This subclass is indented under subclass 484. Systems in which the control members are rotary shafts.

SEE OR SEARCH THIS CLASS, SUBCLASS:

504,	for manually operated rotatable rod, shaft or post type controls.

486	Reciprocating control elements:
	This subclass is indented under subclass 484. Systems in which the controlling elements have a part reciprocating in a line parallel to the steering post axis.

487	Flexible:
	This subclass is indented under subclass 486. Systems in which the reciprocating member is flexible.

488	Handle bar type:
	This subclass is indented under subclass 486. Systems in which the rotary shafts are grouped about a handle bar and in which one of the shafts reciprocates.

[List of Patents for class 74 subclass 489]

489

Flexible control element:

This subclass is indented under subclass 488. Systems in which one element of the controls is a flexible member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

501+,

for Bowden wires.

SEE OR SEARCH CLASS:

464,	Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts, subclasses 51+ for a flexible shaft; and subclasses 173+ for a flexible housing for a shaft or Bowden cable.

[List of Patents for class 74 subclass 490]

490

Antirattling elements:

This subclass is indented under subclass 479. Systems in which a plurality of controlling elements are grouped about each other, and a device is interposed between the controlling elements to prevent rattling.

SEE OR SEARCH CLASS:

238,	Railways: Surface Track, subclass 382 , for noise deadening surface track.
248,	Supports, subclasses 556 , 557, 560+, and 638 for vibration damping supports.
278,	Land Vehicles: Animals Draft Appliances, subclasses 61+ , for anti-rattling thill couplings.
280,	Land Vehicles, subclasses 89+ for an occupant steered vehicle including means for inhibiting or prohibiting unintended variant steering operation known as "wheel shimmy or wobble"; subclass 108 for a draft coupling or tongue antivibrator in a land vehicle of general utility; subclass 137.507 for an antirattler of a fifth wheel; or subclass 780 for an occupant steered vehicle steering arrangement including a pliant or resilient means interposed between a steering post or column and the vehicle structure.

490.01

Robotic arm:

This subclass is indented under subclass 479.01. Systems in which the controlled element is a member of a robotic linkage system which may include a base and its associated supporting structure.

Image 1 for class 74 subclass 490.01

(1) Note. The definitions for various terms relating to "robots" in this subclass definition and in the definitions for those subclasses which are either coordinate or subordinate to this subclass are as set forth in the glossary of Class 901, Robots.

(2) Note. Robotic linkage systems having a claimed specific end effector and details thereof are not provided for in this class (74); see search notes below.

SEE OR SEARCH CLASS:

414,	Material or Article Handling, appropriate subclasses for robot linkage systems having a positively claimed end effector which can manipulate or move an article or a quantity of material.
901,	Robots, for cross reference art collections regarding various robotic features.

490.02

Including power cable or connector:

This subclass is indented under subclass 490.01. Subject matter in which the controlled member has associated therewith an electrical cable, a pneumatic tube, a hydraulic conduit, or a connector which will handle either single or plural energy paths.

Image 1 for class 74 subclass 490.02

SEE OR SEARCH CLASS:

174,	Electricity: Conductors and Insulators, appropriate subclasses for various cable structures and for various insulators or isolators.
439,	Electrical Connectors, appropriate subclasses, for connectors between electrical conductors.

490.03

Including electric motor:

This subclass is indented under subclass 490.01. Subject matter in which one or more electric motors are used to move a robotic linkage system to a desired location within the range of motion of the linkage.

Image 1 for class 74 subclass 490.03

(1) Note. The electric motors in this subclass are used to move the links of a robotic linkage system only; they are not intended to be used in translating a base member.

SEE OR SEARCH CLASS:

310,	Electrical Generator or Motor Structure, appropriate subclasses for various motor structure.
318,	Electricity: Motive Power Systems, subclasses 415+ for automatic motor controls.
901,	Robots, subclasses 23 and 24 for electric motor drive systems for arms with end effectors.

490.04

Including flaccid drive element:

This subclass is indented under subclass 490.01. Subject matter in which the robotic linkage system is moveable to a desired location by drive inputs from one or more nonrigid flexible elements.

Image 1 for class 74 subclass 490.04

(1) Note. Flaccid drive elements include, but are not limited to belts, chains, cables, or solid strands (e.g., bowden wire).

SEE OR SEARCH THIS CLASS, SUBCLASS:

89.2+,

for reciprocating or oscillating to or from alternating rotary including flexible drive connector (e.g., belt, chain, strand).

SEE OR SEARCH CLASS:

901,	Robots, subclass 21 for a robot arm with a flaccid drive element.

490.05

Joint between elements:

This subclass is indented under subclass 490.01. Subject matter in which the controlled member is a drive path connection between two or more members of a robot linkage.

Image 1 for class 74 subclass 490.05

SEE OR SEARCH CLASS:

623,	Prosthesis (i.e., Artificial Body Members), Parts Thereof, or Aids and Accessories Therefor, subclasses 57+ for arm components and connections therebetween.
901,	Robots, subclass 28 for joints in robot linkages.

490.06

Wrist:

This subclass is indented under subclass 490.05. Subject matter in which the joint, typically between the robot linkage and the end effector mount member, permits rotation about a plurality of orthogonal axes.

Image 1 for class 74 subclass 490.06

(1) Note. See Class 901 glossary for a definition of "wrist".

SEE OR SEARCH CLASS:

623,	Prosthesis (i.e., Artificial Body Members), Parts Thereof, or Aids and Accessories Therefor, subclasses 61+ for artificial wrists.
901,	Robots, subclass 29 for robot wrists.

490.07

Power elements as controlling elements:

This subclass is indented under subclass 479.01. Subject matter in which the controlling elements include power devices which include, but are not limited to electric motors, fluid motors, spring motors, heat engines (e.g., thermostatic actuator), electromagnetic devices (e.g., solenoids), etc.

Image 1 for class 74 subclass 490.07

SEE OR SEARCH CLASS:

60,	Power Plants, appropriate subclasses for related prime movers.
91,	Motors: Expansible Chamber Type, appropriate subclasses for fluid motor detail.
92,	Expansible Chamber Devices, appropriate subclasses for fluid actuators.
185,	Motors: Spring, Weight, or Animal Powered, appropriate subclasses for spring escapements or spring motors.
310,	Electrical Generator or Motor Structure, appropriate subclasses for various motor structures and subclasses 311+ for piezoelectric devices.
335,	Electricity: Magnetically Operated Switches, Magnets, and Electromagnets, appropriate subclasses for electromagnetic devices.

490.08

Planar surface with orthogonal movement and rotation:

This subclass is indented under subclass 490.07. Subject matter in which the power elements control both linear movement of a planar surface member (constrained to move along at least one of the three orthogonal spacial axes) and its rotary movement about at least one axis.

Image 1 for class 74 subclass 490.08

(1) Note. This subclass provides a locus for rotary tables which have power inputs to control both translation and rotation.

SEE OR SEARCH CLASS:

33,	Geometrical Instruments, subclass 1 , for x-y motion.
108,	Horizontally Supported Planar Surfaces, subclasses 20 , 137, and 143 for horizontally adjustable planar surfaces.
248,	Supports, subclasses 184 , 657, and 661 for adjustable supports.
269,	Work Holders, subclasses 71 and 73 for work holders with adjustment means to shift the workpiece location on a machine tool.
359,	Optical: Systems and Elements, subclass 393 for microscope stage or slide carrier with plural transverse movement.
414,	Material or Article Handling, subclass 749.1 for horizontal linear movement.

490.09

Planar surface with orthogonal movement only:

This subclass is indented under subclass 490.07. Subject matter in which the power elements control linear movement of a planar surface member that is constrained to move along at least one of the three orthogonal spacial axes.

Image 1 for class 74 subclass 490.09

(1) Note. This subclass provides a locus for x-y tables which have power inputs to control translation only.

SEE OR SEARCH CLASS:

33,	Geometrical Instruments, subclass 1 M, for x-y motion.
108,	Horizontally Supported Planar Surfaces, subclasses 20 , 137, and 143 for horizontally adjustable planar surfaces.
248,	Supports, subclasses 184 , 657, and 661 for adjustable supports.
269,	Work Holders, subclasses 71 and 73 for work holders with adjustment means to shift the workpiece location on a machine tool.
359,	Optical: Systems and Elements, subclass 393 for microscope stage or slide carrier with plural transverse movement.
414,	Material or Article Handling, subclass 749 for horizontal linear movement.

490.1	Pair of power elements:
	This subclass is indented under subclass 490.07. Subject matter in which there are only two power elements in the linkage system.

490.11

Power and manual controlling elements:

This subclass is indented under subclass 479.01. Subject matter in which there is a combination of at least one power driven element and at least one manually operated element which together control the system"s single output element.

Image 1 for class 74 subclass 490.11

(1) Note. In this subclass, and in coordinate and subordinate subclasses, the terms "manual" and "hand operated" also include using leg or foot power.

SEE OR SEARCH THIS CLASS, SUBCLASS:

625,	for devices having alternate manual or power operators to control an output.

490.12

Manual controlling elements:

This subclass is indented under subclass 479.01. Subject matter in which there is a plurality of exclusively hand or exclusively foot operated devices which together provide inputs to control the system"s single output element.

Image 1 for class 74 subclass 490.12

(1) Note. In this subclass, manual elements include, but are not limited to such devices as push buttons, levers, handwheels, foot pedals, etc.

(2) Note. In this subclass, and in coordinate and subordinate subclasses, the terms "manual" and "hand operated" also includes using leg or foot power.

490.13

Planar surface with orthogonal movement or rotation:

This subclass is indented under subclass 490.12. Subject matter in which hand operated elements control both linear movement of a planar surface member (constrained to move along at least one of the three orthogonal spacial axes) or its rotary movement about at least one axis.

Image 1 for class 74 subclass 490.13

(1) Note. This subclass provides a locus for rotary tables which have only manual inputs to control translation or rotation.

SEE OR SEARCH CLASS:

33,	Geometrical Instruments, subclass 1 M, for x-y motion.
108,	Horizontally Supported Planar Surfaces, subclasses 20 , 137, and 143 for horizontally adjustable planar surfaces.
248,	Supports, subclasses 184 , 657, and 661 for adjustable supports.
269,	Work Holders, subclasses 71 and 73 for work holders with adjustment means to shift the workpiece location on a machine tool.
359,	Optical: Systems and Elements, subclass 393 for microscope stage or slide carrier with plural transverse movement.
414,	Material or Article Handling, subclass 749 for horizontal linear movement.

490.14

Levers:

This subclass is indented under subclass 490.12. Subject matter in which the manual controlling elements are a plurality of first, second, or third degree levers which are either operated by hand or by foot.

Image 1 for class 74 subclass 490.14

(1) Note. In this subclass, levers include, but are not limited to such devices as handwheels, foot pedals, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

481,	for the combination of a hand operated lever and a foot operated pedal.

490.15

Pair of levers:

This subclass is indented under subclass 490.14. Subject matter in which there are only two control elements in the linkage system that are exclusively either hand or foot operated.

(1) Note. In this subclass, levers include, but are not limited to such devices as handwheels, foot pedals, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

481,	for the combination of a hand operated lever and a foot operated pedal.

491	Hand operated:
	This subclass is indented under subclass 469. Systems which are hand operated.

[List of Patents for class 74 subclass 492]

492

Steering posts:

This subclass is indented under subclass 491. Hand operated steering posts.

Image 1 for class 74 subclass 492

SEE OR SEARCH CLASS:

180,	Motor Vehicles, subclasses 78 and 400+ for steering posts combined with vehicle structure.

[List of Patents for class 74 subclass 493]

493

Adjustable:

This subclass is indented under subclass 492. Hand operated steering posts which are angularly or axially adjustable.

SEE OR SEARCH THIS CLASS, SUBCLASS:

485,	for steering posts, per se.

494	Auxiliary operators:
	This subclass is indented under subclass 492. Auxiliary devices to be used alternately with the conventional steering wheel or arm for operating steering posts.

[List of Patents for class 74 subclass 495]

495

Position controllers:

This subclass is indented under subclass 492. Devices acting on a steering post or wheel to position it in a selected position.

(1) Note. In this subclass the steering post is positioned, as distinguished from being positively locked, which latter feature is covered by the locks in Class 70, Locks, subclasses 182+.

SEE OR SEARCH CLASS:

70,	Locks, subclasses 182+ for a lock for a rotary shaft (e.g., a steering post); subclasses 207+ for a lock for a handle, a handwheel (e.g., a steering wheel), or a knob; and subclass 252 for a lock for an automobile steering mechanism, and wherein the mechanism includes a switch.
192,	Clutches and Power-Stop Control, subclass 219 , for drive release locking clutches.
280,	Land Vehicles, subclass 89.11 for a general utility land vehicle including occupant controlled steering of laterally opposed, stub axle supported, steerable road wheels provided with means for returning the steerable road wheels to a center or neutral angulation which may or may not be fluid operated; subclass 89.13 for a fluid positioning device employed in conjunction with the tie rod interconnecting laterally opposed steerable stub axles not returning the steerable road wheels to a center or neutral angulation; or subclass 90 for a general utility land vehicle including occupant controlled steering having fluid positioning devices not limited to laterally opposed, stub axle supported, steerable road wheels.

[List of Patents for class 74 subclass 496]

496

Motion translating mechanism:

This subclass is indented under subclass 492. Devices for transferring power from steering posts to steering linkage.

SEE OR SEARCH CLASS:

180,	Motor Vehicles, subclasses 400+ , for power-operated steering mechanisms.

[List of Patents for class 74 subclass 497]

497

Cam type:

This subclass is indented under subclass 496. Mechanisms in which cams are used for transferring power from the steering posts to the steering linkage.

SEE OR SEARCH THIS CLASS, SUBCLASS:

56+,	for mechanical movements of the rotary to or from reciprocating or oscillating type having an axial cam and slide.
74,	for mechanical movements of the rotary to alternating rotary type having mutilated gearing connections.

[List of Patents for class 74 subclass 498]

498

Gear type:

This subclass is indented under subclass 496. Mechanisms in which gears are used for transferring power from steering posts to steering linkages.

SEE OR SEARCH THIS CLASS, SUBCLASS:

485,	for combined steering and control assemblies.
640+,	for gearing, per se.

[List of Patents for class 74 subclass 499]

499

Screw and nut:

This subclass is indented under subclass 498. Mechanisms in which screw and nut gearing is used.

SEE OR SEARCH THIS CLASS, SUBCLASS:

424.71

through 424.96, for screw and nut gearing, per se.

[List of Patents for class 74 subclass 500]

500

Worm:

This subclass is indented under subclass 498. Mechanisms in which worm gearing is used.

SEE OR SEARCH THIS CLASS, SUBCLASS:

425+,

for worm gearing, per se.

500.5

Flexible transmitter (e.g., bowden cable):

This subclass is indented under subclass 491. Mechanism including an elongated element for transmitting force or motion from a hand to operate a device, wherein the element is formed of a flexible or pilant material or a series of pivoted links, such that the force or motion may be transmitted along a curved path.

SEE OR SEARCH CLASS:

4,	Baths, Closets, Sinks, and Spittoons, subclass 412 for a flexible linkage actuator for a float-type flush valve.
73,	Measuring and Testing, subclasses 318 and 321 for flexible transmission elements combined with liquid level gauges and uses to transmit motion from a float to a gauge.
100,	Presses, subclasses 267 and 278+ for presses which employ a flexible element actuator.
138,	Pipes and Tubular Conduits, subclasses 118+ for a flexible pipe.
160,	Flexible or Portable Closure, Partition, or Panel, subclasses 344+ for cable-operators for curtains or drapes.
172,	Earth Working, subclasses 414 , 502 and 829 for earth working apparatus which employs a flexible cable actuator (e.g., for raising or lowering a bulldozer blade).
212,	Traversing Hoists, subclasses 239 through 241and 262-263 for cable actuated crane booms.
244,	Aeronautics and Astronautics, subclass 232 for a pilot operated cable and linkage control system.
251,	Valves and Valve Actuation, subclass 294 for a flexible cable valve actuator.
254,	Implements or Apparatus for Applying a Pushing or Pulling Force, particularly subclasses 264+ for cable actuators for load hauling or hoisting devices.
446,	Amusement Devices: Toys, subclasses 31+ for tethered toy aircraft having cable operated mechanisms.
464,	Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts, subclasses 51+ for a flexible torque transmitting element.

501.5

Constant tension sustaining:

This subclass is indented under subclass 500.5. Devices comprising means for maintaining an established static stretch or pull in the flexible elements, effective upon change in said stretch or pull, for concurrently restoring the same to the established value.

(1) Note. Many of these devices correct the change in tension resulting from a change in elongation of either the flexible element and/or the system mounting, due to variations in temperature.

SEE OR SEARCH THIS CLASS, SUBCLASS:

586,	for longitudinally adjustable piston rods.

SEE OR SEARCH CLASS:

246,	Railway Switches and Signals, subclasses 152+ , for constant tension sustaining mechanism disclosed for use in interlocking, manually actuated, mechanically locking, railway switches and signals.
267,	Spring Devices, appropriate subclasses, for spring devices, per se.
474,	Endless Belt Power Transmission Systems or Components, particularly subclasses 101+ for a belt tightener.

501.6

And hand operator:

This subclass is indented under subclass 500.5. Mechanism including a particular input portion which is directly contacted and manipulated by the hand.

SEE OR SEARCH CLASS:

446,	Amusement Devices: Toys, subclasses 31+ for a (cable) control handle for a tethered toy aircraft.

[List of Patents for class 74 subclass 502]

502

Slidable:

This subclass is indented under subclass 501.6. Device wherein the particular input portion which is directly contacted and manipulated by the hand comprises a reciprocating rod slidably engaged in fixed support structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

487,	for hand operators for reciprocating flexible elements combined with post structure.

502.1	For moving a mirror:
	This subclass is indented under subclass 501.6. Mechanism wherein the elongated flexible element is connected to a device having a polished or smoothed surface that forms an image by reflection, and is intended to transmit motion from a hand to the device.

502.2

Single rotatable lever (e.g., for bicycle brake or deraileur):

This subclass is indented under subclass 501.6. Mechanism wherein the particular input portion comprises a pivoted link or bar having a first section adapted to be contacted and moved by the hand, and a second portion connected directly to the flexible element or an intermediate fastener.

(1) Note. Mechanism which employ serially connected levers at the input to the flexible element are excluded.

SEE OR SEARCH CLASS:

254,	Implements or Apparatus for Applying Pushing or Pulling Force, subclasses 243+ for a hand lever for tensioning flexible material (e.g., cable).

502.3

Including rolling antifriction elements:

This subclass is indented under subclass 500.5. Mechanism including a plurality of discrete rotatable elements located between and contacting the flexible element and its surrounding or supporting structure, to eliminate frictional contact between the two.

SEE OR SEARCH CLASS:

160,	Flexible or Portable Closure, Partition, or Panel, subclasses 346 and 347 for cable antifriction means employed with drape or curtain operators.

502.4

And sheath support, connector, or anchor:

This subclass is indented under subclass 500.5. Mechanism including a flexible tubular housing covering a substantial length of the flexible element and which allows axial movement of the element therein, wherein one of the following is provided: (a) means to hold up or provide a foundation for the flexible housing or (b) means to fasten an end of the flexible housing either to another section of flexible housing or to a structure which is fixed with respect to the flexible element.

SEE OR SEARCH CLASS:

248,	Supports, subclasses 65+ for a sheath support bracket, per se.

502.5

Specific cable or sheath structure:

This subclass is indented under subclass 500.5. Mechanism wherein significance is attributed to the particular composition or form of either the elongated flexible element or a flexible tubular housing which covers a substantial length of the flexible element and allows axial movement of the element therein.

SEE OR SEARCH CLASS:

428,	Stock Material or Miscellaneous Articles, subclass 36 for conduit or tube type stock material and subclass 377 for a sheath having a wound or wrapped core or coating.
464,	Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts, subclass 173 for flexible shaft housings.

502.6

Specific cable connector or guide:

This subclass is indented under subclass 500.5. Mechanism wherein particular significance is attributed to either (a) a device or structure for fastening an end of the flexible element to something, or (b) a rigid element which defines a path through which the flexible element moves and which limits lateral movement of the flexible element.

SEE OR SEARCH CLASS:

24,	Buckles, Buttons and Clasps, etc., subclasses 115+ for means to fasten a cable or cord to something other than a cable or cord.
254,	Implements or Apparatus for Applying Pushing or Pulling Force, subclass 389 for cable guides.
403,	Joints and Connections, appropriate subclasses for a cable connector, per se.
439,	Electrical Connectors, appropriate subclasses for devices adapted to electrically connect two wires.

[List of Patents for class 74 subclass 503]

503

Sliding rod:

This subclass is indented under subclass 491. Devices comprising hand operated, rigid, control members which operate by sliding movement in the direction of their longitudinal axes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

502,	for slidable operators for flexible transmitters.

504	Rotatable rod, shaft, or post:
	This subclass is indented under subclass 491. Devices, comprising miscellaneous hand operated controls which consist of a rigid rotatable member.

[List of Patents for class 74 subclass 505]

505

Gear, drum, and cable:

This subclass is indented under subclass 504. Systems in which the control member is a rotatable rod, shaft, or post which transmits motion through a gear to a drum and cable.

SEE OR SEARCH THIS CLASS, SUBCLASS:

492+,

for steering posts.

SEE OR SEARCH CLASS:

188,	Brakes, subclasses 82.1+ , for brakes applied to elements rotated relative to stationary elements to prevent retrograde rotation while allowing forward rotation.
254,	Implements or Apparatus for Applying Pushing or Pulling Force, subclasses 266+ for apparatus for hauling or hoisting a load which includes a driven drum for pulling on or traveling along a cable, and wherein either the drum or the cable is attached to the load.

506	Drum and cable:
	This subclass is indented under subclass 504. Devices directly connected to a drum and cable.

507	Gear:
	This subclass is indented under subclass 504. Devices connected to gearing for operating it.

[List of Patents for class 74 subclass 508]

508

Variable ratio:

This subclass is indented under subclass 507. Devices which translate the forces applied thereto with varying ratios.

(1) Note. The device may be either automatic, or be changed manually.

509	Screw and nut:
	This subclass is indented under subclass 507. Devices in the form of screw and nut gearing used for transmitting force and motion from the rotatable control member to the controlled linkage.

510	Adjustable:
	This subclass is indented under subclass 504. Devices consisting of rigid rotatable control members which are collapsible when not in use and adjustable either axially or transversely.

511	Mountings:
	This subclass is indented under subclass 504. Devices for supporting and mounting hand operated rotatable rods, shafts, or posts, and their motion translating mechanisms.

512

Foot operated:

This subclass is indented under subclass 469. Systems which are operated by foot controlled members.

SEE OR SEARCH THIS CLASS, SUBCLASS:

482,	for interconnected hand and foot operators.
564,	for foot rests.

513	Accelerator:
	This subclass is indented under subclass 512. Systems in which the foot operated member operates a linkage system which controls a carburetor.

514	Signal:
	This subclass is indented under subclass 512. Systems in which the foot operated member operates a linkage system which controls a signal.

515	Knee operated:
	This subclass is indented under subclass 469. Systems operated by a knee controlled member.

516	Variable output force:
	This subclass is indented under subclass 469. Systems having a mechanical unit which automatically varies the out-put force during the operation.

517	Flexible:
	This subclass is indented under subclass 516. Systems wherein one element of the mechanical force varying unit is flexible.

518	Variable input leverage:
	This subclass is indented under subclass 516. Syste