US Patent Class 322
ELECTRICITY: SINGLE GENERATOR SYSTEMS



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Current as of: June, 1999
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  DF  CLASS NOTES
1  DF  PORTABLY MOUNTED
2 R  DF  NONMAGNETIC-TYPE GENERATOR
2 A  DF  .~ Electrostatic
3  DF  RECIPROCATING AND/OR OSCILLATING-TYPE GENERATOR
4  DF  WITH FLYWHEELS OR MASSIVE MOVING PARTS
5  DF  WITH GENERATOR POLARITY CONTROL
6  DF  .~ By control of excitation
7  DF  COMBINED CONTROL OF GENERATING MEANS AND LOAD CIRCUIT
8  DF  .~ Including load circuit-making and breaking
9  DF  PLURAL DRIVING MEANS
10  DF  WITH PHYSICAL STARTING AND/OR STOPPING OF THE GENERATOR
11  DF  .~ Automatic in response to predetermined conditions
12  DF  .~ Connecting and/or disconnecting generator and driving means
13  DF  .~ Electric motor as driving means
14  DF  COMBINED CONTROL OF GENERATOR AND DRIVING MEANS
15  DF  .~ Simultaneous control
16  DF  .~.~ Electric motor
17  DF  AUTOMATIC CONTROL OF GENERATOR OR DRIVING MEANS
18  DF  .~ With time-delay in the response
19  DF  .~ Antihunting or rate of change
20  DF  .~ Power factor or phase relationships
21  DF  .~ With line-drop compensation
22  DF  .~ Plural conditions
23  DF  .~.~ Including an electrical condition
24  DF  .~.~.~ Plural electrical conditions
25  DF  .~.~.~.~ Voltage and current
26  DF  .~ Light or photosensitive control circuits
27  DF  .~ Current output
28  DF  .~ Voltage of generator or circuit supplied
29  DF  .~ Speed or frequency of generator
30  DF  .~.~ Centrifugal of fly weight governor
31  DF  .~.~ Tachometer devices
32  DF  .~.~ Frequency responsive devices or networks
33  DF  .~ Thermal conditions
34  DF  .~.~ In generator and/or driving means
35  DF  .~ Fluid pressure including wind
36  DF  .~ With respect to a reference or master device or quantity
37  DF  .~ Electrical conditions in circuit other than that of generator being controlled
38  DF  DRIVING MEANS CONTROL
39  DF  .~ Electric motor control
40  DF  POWER TRANSMITTING MECHANISM CONTROL
41  DF  .~ Friction-type transmission
42  DF  .~.~ Belt drive
43  DF  .~.~.~ Slip control
44  DF  GENERATOR CONTROL
45  DF  .~ Combined diverse generator controls
46  DF  .~ Combined permanent magnet and wound field structure
47  DF  .~ Induction generator
48  DF  .~ Acyclic or homopolar-type generator
49  DF  .~ Magnetic structure
50  DF  .~.~ Magnetic shunt for field flux
51  DF  .~.~ Rotor element
52  DF  .~.~ Stator element
53  DF  .~ Odd number of brushes (e.g., 3rd brush type)
54  DF  .~ Adjustable current-collecting mechanism
55  DF  .~.~ Movable circumferentially
56  DF  .~.~.~ Continuously
57  DF  .~ With nonexciting saturating means for generator structure
58  DF  .~ With means for suppressing, eliminating or minimizing undesired frequencies
59  DF  .~ With excitation winding and/or circuit control
60  DF  .~.~ Substitute or auxiliary starting source of excitation
61  DF  .~.~ Alternating current excitation
62  DF  .~.~ Plural sets of poles type of generator
63  DF  .~.~ Plural excitation windings
64  DF  .~.~.~ Differentially related
65  DF  .~.~.~ Interpole windings
66  DF  .~.~.~ Compensating windings
67  DF  .~.~ Series-wound generator
68  DF  .~.~ Short circuiting of field winding
69  DF  .~.~ Circuit interruption
70  DF  .~.~.~ Continuous make and break
71  DF  .~.~ Variable length field winding
72  DF  .~.~ Control by electric space discharge
73  DF  .~.~.~ Discharge control discharge device
74  DF  .~.~.~ Electric arc
75  DF  .~.~ Control by circuit impedance
76  DF  .~.~.~ Plural impedances
77  DF  .~.~.~.~ Bridge arrangements
78  DF  .~.~.~.~ Tuned or resonant
79  DF  .~.~.~ Unidirectionally conductive
80  DF  .~.~.~ Resistance
81  DF  .~.~.~.~ Thermally varied resistance
82  DF  .~.~.~.~ Pressure-varied resistance
83  DF  .~.~.~.~ Short-circuited
84  DF  .~.~.~.~.~ Continuous make and break
85  DF  .~.~.~.~.~ Step by step
86  DF  .~.~ Plural sources of excitation voltage
87  DF  .~.~.~ Dynamoelectric source
88  DF  .~.~.~ Battery source
89  DF  .~ With armature or primary circuit control
90  DF  .~.~ Plural armature circuits or windings
91  DF  .~.~ Short-circuiting of windings
92  DF  .~.~.~ By auxiliary brushes diametrically opposed or 180 electrical degrees apart
93  DF  .~.~ Tapped or sectionalized
94  DF  .~.~ Circuit-making and/or breaking
95  DF  .~.~ By armature circuit impedance
96  DF  .~.~.~ Plural impedances
97  DF  .~.~.~ Resistance control
98  DF  .~.~.~.~ In circuit across brushes or in shunt to generator
99  DF  WITH SIGNALS, INDICATORS, RECORDERS, TESTING, ETC.
100  DF  MISCELLANEOUS
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DIGESTS
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DIG 2  DD  Generator field current-responsive systems
DIG 5  DD  Hall effects elements
DIG 6  DD  Ripple sensitive