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Class   388ELECTRICITY: MOTOR CONTROL SYSTEMS
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This Class 388 is considered to be an integral part of Class 318 (see the Class 318 schedule for the two positions of this Class in schedule hierarchy). This Class retains all pertinent definitions and class lines of Class 318.
[List of Pre Grant Publications for class 388 subclass 800][List of Patents for class 388 subclass 800]800 CLOSED LOOP SPEED CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR
 [List of Pre Grant Publications for class 388 subclass 801][List of Patents for class 388 subclass 801]801 Subclass 801 indent level is 1 Field control, or field and armature control, by digital or combined analog and digital circuitry
[List of Pre Grant Publications for class 388 subclass 803][List of Patents for class 388 subclass 803]803 Subclass 803 indent level is 1 Field control, or field and armature control, by analog (only) circuitry
 [List of Pre Grant Publications for class 388 subclass 804][List of Patents for class 388 subclass 804]804 Subclass 804 indent level is 2 By pulse width or duty cycle modification
 [List of Pre Grant Publications for class 388 subclass 805][List of Patents for class 388 subclass 805]805 Subclass 805 indent level is 2 By phase or frequency modification
[List of Pre Grant Publications for class 388 subclass 806][List of Patents for class 388 subclass 806]806 Subclass 806 indent level is 2 By voltage or current modification
 [List of Pre Grant Publications for class 388 subclass 808][List of Patents for class 388 subclass 808]808 Subclass 808 indent level is 2 By selection of windings
[List of Pre Grant Publications for class 388 subclass 809][List of Patents for class 388 subclass 809]809 Subclass 809 indent level is 1 Armature control by digital or combined analog and digital circuitry
 [List of Pre Grant Publications for class 388 subclass 811][List of Patents for class 388 subclass 811]811 Subclass 811 indent level is 2 By pulse width or duty cycle modification
 [List of Pre Grant Publications for class 388 subclass 812][List of Patents for class 388 subclass 812]812 Subclass 812 indent level is 2 By phase and frequency modification
 [List of Pre Grant Publications for class 388 subclass 813][List of Patents for class 388 subclass 813]813 Subclass 813 indent level is 2 By phase modification
 [List of Pre Grant Publications for class 388 subclass 814][List of Patents for class 388 subclass 814]814 Subclass 814 indent level is 2 By frequency modification
 [List of Pre Grant Publications for class 388 subclass 815][List of Patents for class 388 subclass 815]815 Subclass 815 indent level is 2 By voltage or current modification
[List of Pre Grant Publications for class 388 subclass 816][List of Patents for class 388 subclass 816]816 Subclass 816 indent level is 1 Analog armature control
 [List of Pre Grant Publications for class 388 subclass 819][List of Patents for class 388 subclass 819]819 Subclass 819 indent level is 2 By pulse width or duty cycle modification
 [List of Pre Grant Publications for class 388 subclass 820][List of Patents for class 388 subclass 820]820 Subclass 820 indent level is 2 By phase or frequency modification
 [List of Pre Grant Publications for class 388 subclass 821][List of Patents for class 388 subclass 821]821 Subclass 821 indent level is 2 By voltage and current modification
 [List of Pre Grant Publications for class 388 subclass 822][List of Patents for class 388 subclass 822]822 Subclass 822 indent level is 2 By voltage modification
 [List of Pre Grant Publications for class 388 subclass 823][List of Patents for class 388 subclass 823]823 Subclass 823 indent level is 2 By current modification
 [List of Pre Grant Publications for class 388 subclass 824][List of Patents for class 388 subclass 824]824 Subclass 824 indent level is 2 By variable impedance (e.g., potentiometer)
[List of Pre Grant Publications for class 388 subclass 825][List of Patents for class 388 subclass 825]825 OPEN LOOP SPEED CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR
[List of Pre Grant Publications for class 388 subclass 826][List of Patents for class 388 subclass 826]826 Subclass 826 indent level is 1 Field control, or field and armature control
 [List of Pre Grant Publications for class 388 subclass 827][List of Patents for class 388 subclass 827]827 Subclass 827 indent level is 2 With plural selectable speeds (e.g., manual switch)
[List of Pre Grant Publications for class 388 subclass 828][List of Patents for class 388 subclass 828]828 Subclass 828 indent level is 1 Armature control by digital or combined analog and digital circuitry
 [List of Pre Grant Publications for class 388 subclass 829][List of Patents for class 388 subclass 829]829 Subclass 829 indent level is 2 By pulse width or duty cycle modification
[List of Pre Grant Publications for class 388 subclass 830][List of Patents for class 388 subclass 830]830 Subclass 830 indent level is 1 Analog armature control
 [List of Pre Grant Publications for class 388 subclass 831][List of Patents for class 388 subclass 831]831 Subclass 831 indent level is 2 By pulse width or duty cycle modification
 [List of Pre Grant Publications for class 388 subclass 832][List of Patents for class 388 subclass 832]832 Subclass 832 indent level is 2 By frequency modification
 [List of Pre Grant Publications for class 388 subclass 833][List of Patents for class 388 subclass 833]833 Subclass 833 indent level is 2 By voltage or current modification
 [List of Pre Grant Publications for class 388 subclass 834][List of Patents for class 388 subclass 834]834 Subclass 834 indent level is 2 By selection of windings
[List of Pre Grant Publications for class 388 subclass 835][List of Patents for class 388 subclass 835]835 Subclass 835 indent level is 2 By control of motor structure
 [List of Pre Grant Publications for class 388 subclass 837][List of Patents for class 388 subclass 837]837 Subclass 837 indent level is 2 By periodic mechanical switch
[List of Pre Grant Publications for class 388 subclass 838][List of Patents for class 388 subclass 838]838 Subclass 838 indent level is 2 With plural selectable speeds (e.g., with manual switch, potentiometer
[List of Pre Grant Publications for class 388 subclass 842][List of Patents for class 388 subclass 842]842 CLOSED LOOP ACCELERATION CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR
 [List of Pre Grant Publications for class 388 subclass 843][List of Patents for class 388 subclass 843]843 Subclass 843 indent level is 1 Field control, or field and armature control
[List of Pre Grant Publications for class 388 subclass 844][List of Patents for class 388 subclass 844]844 Subclass 844 indent level is 1 Armature control
 [List of Pre Grant Publications for class 388 subclass 847][List of Patents for class 388 subclass 847]847 Subclass 847 indent level is 2 By voltage or current modification
[List of Pre Grant Publications for class 388 subclass 848][List of Patents for class 388 subclass 848]848 OPEN LOOP ACCELERATION CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR
[List of Pre Grant Publications for class 388 subclass 849][List of Patents for class 388 subclass 849]849 Subclass 849 indent level is 1 Field control, or field and armature control
 [List of Pre Grant Publications for class 388 subclass 850][List of Patents for class 388 subclass 850]850 Subclass 850 indent level is 2 By transformer or inductive device
 [List of Pre Grant Publications for class 388 subclass 851][List of Patents for class 388 subclass 851]851 Subclass 851 indent level is 2 By patterned switch
 [List of Pre Grant Publications for class 388 subclass 852][List of Patents for class 388 subclass 852]852 Subclass 852 indent level is 2 By insertion of resistance
[List of Pre Grant Publications for class 388 subclass 853][List of Patents for class 388 subclass 853]853 Subclass 853 indent level is 1 Armature control
 [List of Pre Grant Publications for class 388 subclass 854][List of Patents for class 388 subclass 854]854 Subclass 854 indent level is 2 By voltage or current modification
[List of Pre Grant Publications for class 388 subclass 855][List of Patents for class 388 subclass 855]855 Subclass 855 indent level is 2 By selectable or variable impedance
 
CROSS-REFERENCE ART COLLECTIONS
 
[List of Pre Grant Publications for class 388 subclass 900][List of Patents for class 388 subclass 900]900 SPECIFIC SYSTEM OPERATIONAL FEATURE
 [List of Pre Grant Publications for class 388 subclass 901][List of Patents for class 388 subclass 901]901 Subclass 901 indent level is 1 Sample and hold
 [List of Pre Grant Publications for class 388 subclass 902][List of Patents for class 388 subclass 902]902 Subclass 902 indent level is 1 Compensation
 [List of Pre Grant Publications for class 388 subclass 903][List of Patents for class 388 subclass 903]903 Subclass 903 indent level is 1 Protective (e.g., voltage or current limit)
 [List of Pre Grant Publications for class 388 subclass 904][List of Patents for class 388 subclass 904]904 Subclass 904 indent level is 1 Stored velocity profile
 [List of Pre Grant Publications for class 388 subclass 905][List of Patents for class 388 subclass 905]905 Subclass 905 indent level is 1 Armature and field windings connected in series (i.e., series motor)
 [List of Pre Grant Publications for class 388 subclass 906][List of Patents for class 388 subclass 906]906 Subclass 906 indent level is 1 Proportional-integral system
[List of Pre Grant Publications for class 388 subclass 907][List of Patents for class 388 subclass 907]907 SPECIFIC CONTROL CIRCUIT ELEMENT OR DEVICE
 [List of Pre Grant Publications for class 388 subclass 907.2][List of Patents for class 388 subclass 907.2]907.2 Subclass 907.2 indent level is 1 Bridge circuit
 [List of Pre Grant Publications for class 388 subclass 907.5][List of Patents for class 388 subclass 907.5]907.5 Subclass 907.5 indent level is 1 Computer or microprocessor
 [List of Pre Grant Publications for class 388 subclass 908][List of Patents for class 388 subclass 908]908 Subclass 908 indent level is 1 Frequency to voltage converter
 [List of Pre Grant Publications for class 388 subclass 909][List of Patents for class 388 subclass 909]909 Subclass 909 indent level is 1 Monitoring means
 [List of Pre Grant Publications for class 388 subclass 910][List of Patents for class 388 subclass 910]910 Subclass 910 indent level is 1 Operational/differential amplifier
 [List of Pre Grant Publications for class 388 subclass 911][List of Patents for class 388 subclass 911]911 Subclass 911 indent level is 1 Phase locked loop
 [List of Pre Grant Publications for class 388 subclass 912][List of Patents for class 388 subclass 912]912 Subclass 912 indent level is 1 Pulse or frequency counter
[List of Pre Grant Publications for class 388 subclass 913][List of Patents for class 388 subclass 913]913 Subclass 913 indent level is 1 Saturable reactor, space discharge device, or magnetic amplifier
 [List of Pre Grant Publications for class 388 subclass 914][List of Patents for class 388 subclass 914]914 Subclass 914 indent level is 2 Thyratron or ignitron
 [List of Pre Grant Publications for class 388 subclass 915][List of Patents for class 388 subclass 915]915 Subclass 915 indent level is 1 Sawtooth or ramp waveform generator
 [List of Pre Grant Publications for class 388 subclass 916][List of Patents for class 388 subclass 916]916 Subclass 916 indent level is 1 Threshold circuit
[List of Pre Grant Publications for class 388 subclass 917][List of Patents for class 388 subclass 917]917 Subclass 917 indent level is 1 Thyristor or SCR
 [List of Pre Grant Publications for class 388 subclass 918][List of Patents for class 388 subclass 918]918 Subclass 918 indent level is 2 Trigger by unijunction transistor
 [List of Pre Grant Publications for class 388 subclass 919][List of Patents for class 388 subclass 919]919 Subclass 919 indent level is 2 Triggered by resistor or capacitor
 [List of Pre Grant Publications for class 388 subclass 920][List of Patents for class 388 subclass 920]920 Subclass 920 indent level is 2 Chopper
 [List of Pre Grant Publications for class 388 subclass 921][List of Patents for class 388 subclass 921]921 Subclass 921 indent level is 1 Timer or time delay means
 [List of Pre Grant Publications for class 388 subclass 922][List of Patents for class 388 subclass 922]922 Subclass 922 indent level is 1 Tuned or resonant circuit
[List of Pre Grant Publications for class 388 subclass 923][List of Patents for class 388 subclass 923]923 SPECIFIC FEEDBACK CONDITION OR DEVICE
[List of Pre Grant Publications for class 388 subclass 924][List of Patents for class 388 subclass 924]924 Subclass 924 indent level is 1 Centrifugal device (e.g., governor)
 [List of Pre Grant Publications for class 388 subclass 925][List of Patents for class 388 subclass 925]925 Subclass 925 indent level is 2 Including contacts which open and close motor circuit
 [List of Pre Grant Publications for class 388 subclass 926][List of Patents for class 388 subclass 926]926 Subclass 926 indent level is 2 Which controls a vacuum tube or solid-state device in motor circuit
 [List of Pre Grant Publications for class 388 subclass 927][List of Patents for class 388 subclass 927]927 Subclass 927 indent level is 2 Which varies resistance of motor circuit
 [List of Pre Grant Publications for class 388 subclass 928][List of Patents for class 388 subclass 928]928 Subclass 928 indent level is 2 Which controls position of commutator brushes
 [List of Pre Grant Publications for class 388 subclass 928.1][List of Patents for class 388 subclass 928.1]928.1 Subclass 928.1 indent level is 1 Counter or back EMF (CEMF)
 [List of Pre Grant Publications for class 388 subclass 929][List of Patents for class 388 subclass 929]929 Subclass 929 indent level is 1 Fluid/granular material flow rate, pressure, or level
[List of Pre Grant Publications for class 388 subclass 930][List of Patents for class 388 subclass 930]930 Subclass 930 indent level is 1 Load or torque
 [List of Pre Grant Publications for class 388 subclass 931][List of Patents for class 388 subclass 931]931 Subclass 931 indent level is 2 Electric generator or magnet as auxiliary load
 [List of Pre Grant Publications for class 388 subclass 932][List of Patents for class 388 subclass 932]932 Subclass 932 indent level is 2 With reverse torque (e.g., braking)
 [List of Pre Grant Publications for class 388 subclass 933][List of Patents for class 388 subclass 933]933 Subclass 933 indent level is 1 Radiant energy responsive device
 [List of Pre Grant Publications for class 388 subclass 934][List of Patents for class 388 subclass 934]934 Subclass 934 indent level is 1 Thermal condition
[List of Pre Grant Publications for class 388 subclass 935][List of Patents for class 388 subclass 935]935 SPECIFIC APPLICATION:
 [List of Pre Grant Publications for class 388 subclass 936][List of Patents for class 388 subclass 936]936 Subclass 936 indent level is 1 Food preparation equipment
 [List of Pre Grant Publications for class 388 subclass 937][List of Patents for class 388 subclass 937]937 Subclass 937 indent level is 1 Hand tool
 
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