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Class Information
Number: 318
Name: Electricity: motive power systems >
Description: BASIC SUBJECT MATTER OF THE CLASS:










Class Number Class Name No. of Patents
318/383

"anti-braking" or braking-prevention means

11
318/244

Alternating current commutating motors

57
318/245

Universal or a.c.-d.c. motors

147
318/494

Armature (or primary) circuit control

57
318/519

By armature or primary circuit-making and/or breaking

21
318/520

Electromagnetically actuated

8
318/505

By means to space-discharge devices

8
318/507

Having discharge-control means (e.g., grids)

9
318/506

Plural, diverse or diversely connected or controlled space-discharge devices

8
318/501

By shunting armature or primary winding

11
318/503

Frequency or pulsation control

47
318/508

Impedance-controlled

17
318/512

Inductive reactor controlled

8
318/513

Having auxiliary means for saturating reactor core

3
318/511

Inherently or self-variable impedance

1
318/509

Plural, diverse or diversely controlled impedances

11
318/510

Including both reactor and condenser

11
318/514

Resistor-controlled

10
318/515

Having short-circuiting means

3
318/516

Short-circuited step-by-step

9
318/500

Plural sources of voltage (including counter e.m.f. cells)

81
318/495

Plural, diverse or diversely controlled, armature or primary windings

19
318/498

Energized or controlled in predetermined sequence

17
318/496

Polyphase windings

22
318/497

Series-parallel

14
318/499

Wound or energized in magnetic opposition

8
318/502

Variable length or tapped armature winding

4
318/504

Voltage control

83
318/445

Automatic and/or with time-delay means (e.g., automatic starting and/or stopping)

396
318/448

Anti-hunting

59
318/478

Electrical conditions in circuit other than controlled motor circuit

44
318/479

Voltage

78
318/482

Level of fluid or granular material

35
318/483

Moisture content or wetness

244
318/474

Motor load, armature or primary or secondary circuit current

84
318/476

In excess of a predetermined magnitude

53
318/477

Intentionally increased load

9
318/475

Mechanical-type detector (e.g., by yielding spring devices)

34
318/466

Movement, position, or limit-of-travel

872
318/468

Limit-of-travel control means

490
318/469

Overloading limit-of-travel-type control means

246
318/470

Magnitude of movement or revolutions

81
318/467

Plural sensing means for determining plural positions or plural limits-of travel

268
318/447

Nonresponsive or less responsive for limited periods

45
318/452

Plural, diverse conditions or with time-delay means

72
318/453

Electrical condition

70
318/454

Plural, diverse electrical conditions

17
318/455

Voltage and current (e.g., watts)

39
318/481

Pressure in a fluid or granular material

53
318/480

Radiant energy

265
318/456

Rate-of-change of a condition

39
318/458

Electrical condition

15
318/457

Interia-type detector

7
318/489

Responsive to direction, inclination or angular position of bodies

68
318/488

Responsive to stress in body or material

48
318/471

Responsive to thermal conditions

452
318/473

In or about the motor being controlled

204
318/472

Of motor control means

128
318/460

Sound, supersonic vibration or mechanical vibration

99
318/461

Speed or rate-of-movement

228
318/462

Centrifugal-type detector

7
318/465

In excess of a predetermined valve

38
318/463

Tachometer-type detector

49
318/464

Electric generator tachometer

22
318/459

Terminal voltage or counter-electromotive force of controlled motor

171
318/484

Time or with time-delay means

167
318/485

Dash-pot or other mechanical delay means

8
318/487

Electromagnetic or inductive time-delay means

12
318/486

Pilot- or servo-motors

4
318/446

With nonautomatic control means (e.g., manual)

123
318/449

With respect to a fixed standard, master or reference device

43
318/450

Electrical detector

36
318/451

Mechanically vibrating device as reference device (e.g., tuning fork)

4
318/136

Auxiliary means for producing mechanical starting or accelerating torque

12
318/137

By auxiliary motor

8
318/139

Battery-fed motor systems

1256
318/362

Braking

196
318/373

"plugging" or application of reverse power to motor

71
318/374

Energy flow interrupted when motor stops

28
318/363

"spotting" or adjustment of braking controller during coasting

15
318/364

Automatic and/or with time-delay means

49
318/366

Condition of motor or driven device

42
318/368

Armature or primary circuit voltage or terminal or counter e.m.f. voltage

53
318/367

Armature or primary current

16
318/369

Speed, acceleration, movement or position of motor or driven device

87
318/365

Plural diverse conditions or with time delay

26
318/382

By auxiliary electric generator or by magnetic attraction or repulsion devices

16
318/375

Dynamic braking

303
318/379

Locally closed armature circuit

80
318/380

Closed through impedance or the like

94
318/381

With field or secondary circuit control

48
318/376

Regenerative

455
318/377

With additional source of e.m.f.

35
318/378

In series with armature or primary circuit

19
318/372

Friction braking

81
318/370

Plural, diverse or diversely controlled braking means

79
318/371

Including both friction braking "plugging" and/or dynamic braking

76
318/432

Constant motor current, load and/or torque control

1453
318/433

Control of motor load or device driven

251
318/162

Control by patterns or other predetermined schedule means

38
318/163

Motor running-speed control

22
318/164

Cyclically varying or repeated speed schedules

6
318/493

Control of both armature (or primary) circuit and field (or secondary) circuit

58
318/491

Control of both motor circuit and motor structure

36
318/1

Electric motor with nonmotor driving means (e.g., axle drive, manual drive)

10
318/2

Manual driving means

37
318/521

Field or secondary circuit control

16
318/536

By field circuit making and/or breaking

5
318/537

Intermittently operated

4
318/532

By means of space-discharge device in field circuit

12
318/533

Impedance-controlled

6
318/534

Plural, diverse or diversely connected or controlled field circuit impedances

3
318/535

Wheatstone bridge

1
318/523

Plural, diverse or diversely connected or controlled field windings

18
318/524

Convertible number-of-poles type (e.g., 4-pole or 6-pole)

10
318/525

Differentially wound or energized windings

3
318/529

Selectively energized

9
318/527

Series field winding

5
318/526

Series-parallel

9
318/528

With means to short circuit a field winding

5
318/530

Plural, diverse or diversely connected or controlled sources of field circuit voltage

14
318/531

Variable length or tapped field winding

6
318/140

Generator-fed motor systems having generator control

165
318/148

Alternating-current-motor system

51
318/141

Automatic generator control and/or with time-delay means

38
318/144

Armature or primary current of motor

12
318/142

Responsive to diverse conditions or with time-delay means

9
318/143

Plural electrical conditions

24
318/146

Speed of motor or driven device

43
318/147

Speed or frequency of generator or its drive means

19
318/145

Terminal voltage or counter e.m.f. of motor

23
318/151

Control of both the generator and the circuit to the motor

48
318/152

With motor control

19
318/153

Control of both the generator and the motor

45
318/154

Control of excitation (field) circuit of both

28
318/158

Generator field circuit control

31
318/157

Generator speed control

18
318/156

Plural, diverse or diversely actuated, generator control means

8
318/150

With flywheel on generator or on motor

55
318/149

With plural, diverse or diversely controlled generators

21
318/440

Having plural, diverse or diversely controlled sources

80
318/441

A.c. and d.c.

29
318/442

Different voltages

66
318/159

Having rotor element biased against rotation

21
318/160

By resilient biasing means (e.g., spring)

16
318/253

Homopolar or uniform field motors

5
318/114

Impact, mechanical shock, or vibration-producing motors

169
318/727

Induction motor systems

494
318/757

Braking

80
318/759

Dynamic braking

87
318/760

Direct current primary winding braking circuit

32
318/761

Rotating rotor controls braking current in primary winding

12
318/762

With a.c. to d.c. conversion circuit

79
318/765

Eddy current braking circuits

6
318/763

Reversal of power to primary winding

20
318/764

Three phase power reversal

8
318/758

With diverse operation

43
318/729

Power-factor control

243
318/766

Primary and secondary circuits

17
318/767

Primary circuit control

129
318/806

Condition responsive

374
318/771

Delta-wye, plural wye, or plural delta connected primary windings

77
318/770

Dual voltage motors

9
318/807

Frequency control

653
318/808

With voltage magnitude control

338
318/809

With voltage phase angle control

342
318/810

With voltage pulse time control

210
318/811

Pluse width modulation or chopping

1073
318/772

Plural speed

117
318/773

Pole changing

67
318/777

Separate primary running winding for each pole number, alternately energized

16
318/774

Single phase motor

35
318/776

Entire primary running winding energized for each running speed

25
318/775

Separate primary running winding for each pole number, alternately energized

30
318/798

Responsive to motor condition

622
318/805

Responsive to motor voltage

374
318/799

Responsive to speed or rotation phase angle

457
318/804

With controlled magnetic reactance

70
318/800

With controlled power conversion

544
318/801

Including inverter

915
318/802

Responsive to an additional condition

335
318/803

With controlled a.c. to d.c. circuit in inverter supply

349
318/778

Starting control

321
318/781

Operating from a single phase source

68
318/794

Capacitor run motor with different capacitance at starting

45
318/795

With plural capacitors

38
318/784

Impedance for reducing current during starting operation

13
318/797

Phase splitting using stator winding mutual inductance or saturable winding

19
318/796

Saturable winding in capacitor run motor circuit

7
318/785

Start winding removed during running operation

79
318/793

By centrifugal switch

32
318/789

By electromagnetic switch

18
318/790

With relay coil in series with main winding

15
318/786

By electronic switch

116
318/787

With transformer for sensing the run winding current

23
318/788

With variable temperature coefficient resistor in switch control circuit

42
318/791

By thermal switch

16
318/792

With variable temperature coefficient impedance element

15
318/782

With protective features

89
318/783

Thermal starting and thermal overload protection

115
318/780

Three phase motor with variable transformer to initially adjust voltage to motor windings

17
318/779

With speed control

157
318/768

Three phase motor operated from single phase source

59
318/769

With dynamoelectric converter

3
318/812

Voltage control

356
318/816

Single phase, split phase motors

14
318/817

With capacitor

53
318/814

With impedance control

58
318/815

Saturable reactor

56
318/813

With transformer

54
318/728

Repulsion start

4
318/739

Reversing

37
318/749

Operating from a single phase source

21
318/750

Shaded pole motor

6
318/751

Split phase motor with capacitor interchangeably connected in series with either primary winding

46
318/752

With controlled electronic device to provide the series connection

12
318/753

With de-energizable start winding

16
318/755

Automatic current reversal on start winding

6
318/754

With separate winding or winding portion energized for each direction of rotation

17
318/747

Two phase motor

33
318/748

With plural primary windings or winding portions having common connection

16
318/756

With controlled electronic switch for phase reversal

16
318/745

With controlled saturable reactor in primary circuit

4
318/746

Two phase motor

2
318/740

With diverse motor operation

10
318/741

With braking

13
318/742

Electromagnetic brakes

7
318/743

Generator action

7
318/744

Plugging

8
318/818

Secondary circuit control

19
318/820

Closed secondary member or member portion with means to change electrical characteristics thereof

9
318/821

Impedance control of secondary circuit

23
318/829

By manual operation

2
318/822

Responsive to motor condition

27
318/827

Frequency of secondary current

12
318/825

Induction motor current

34
318/826

Primary motor current

5
318/823

Rotor speed or position responsive

36
318/824

Centrifugal force of rotor controls secondary circuit impedance

4
318/828

Secondary voltage

7
318/819

Open secondary member or portion thereof with means to open or close the circuit thereto

10
318/737

Self-cascaded motor windings

12
318/738

With commutated winding

19
318/730

With plural separately movable rotors

15
318/830

With relatively movable cooperating motor parts to control energized motor

6
318/831

Axially movable cooperating parts

5
318/832

Dual stators, one or both angularly movable

9
318/731

With voltage source connected to motor secondary

11
318/733

Commutator connected to secondary winding

3
318/732

Electronic device controls current in secondary circuit

54
318/734

Slip rings connected to secondary winding

4
318/735

Rotor shaft coupled to dynamoelectric machine

4
318/736

Slip rings connected to dynamoelectric machine winding

1
318/434

Limitation of motor load, current, torque or force (e.g., preventing overload)

1374
318/135

Linear-movement motors

707
318/118

Magnetostrictive motor

63
318/558

Miscellaneous

109
318/439

Motor commutation control systems

1435
318/430

Motor load, armature current or force control during starting and/or stopping

379
318/431

Initial, "cracking" or "starting from rest" torque control

128
318/492

Motor magnetic energy dissipation

25
318/538

Motor structure adjustment or control

58
318/539

Both armature and field structures rotatable or adjustable

16
318/541

Brush or other current-collector control

37
318/542

Having movement toward or from cooperating part (e.g., brush lifted from commutator)

15
318/540

Rotor element movable axially

10
318/115

Motor with diverse motions (e.g., rotary and reciprocating)

60
318/280

Motor-reversing

539
318/287

Armature or primary circuit control

43
318/291

Armature or primary current reversal

29
318/292

By shifting motor brushes or selecting appropriate set of brushes

19
318/293

Reversing polarity of current supplied to armature circuit

286
318/295

Potentiometer-controlled

11
318/294

Wheatstone bridge type

38
318/288

Plural, diverse or diversely controlled armature windings

6
318/289

Phase-reversal

13
318/290

Selectively energized windings

16
318/283

Automatic and/or with time-delay means

223
318/285

Instant of, or passage or predetermined time or having time-delay means

81
318/286

Movement or position of motor or driven device

561
318/284

With means to delay reversing until motor substantially stops

51
318/296

Field circuit control

6
318/300

Field-circuit current reversed

16
318/297

Plural, diverse or diversely controlled field windings

12
318/298

Simultaneous energization

2
318/299

With means for short-circuiting a winding

5
318/281

Periodic- or intermittent-reversing

84
318/282

In response to movement or position (e.g., limit of travel) of motor or driven device

408
318/116

Nonmagnetic motor

255
318/117

Thermoelectric motor

21
318/436

Nonrunning, energized motor

60
318/696

Open-loop stepping motor control systems

1310
318/443

Periodic, repetitious or successive operations control of motor, including "jog" and "inch" control

308
318/444

Variable periods or intervals between controlling operations

259
318/437

Phasing or angular or linear positional control of movable element of the motor

122
318/255

Plural diverse motor controls

67
318/276

Acceleration control

33
318/277

With automatic starting and/or stopping

24
318/278

In response to an electrical condition

14
318/279

Automatic stopping means less responsive during acceleration

6
318/273

Motor braking

49
318/274

With acceleration control

16
318/275

With automatic starting and/or stopping

32
318/256

Motor-reversing

105
318/263

With acceleration control

9
318/264

With automatic starting and/or stopping

113
318/265

Stopping upon predetermined movement of or position of motor or driven device

149
318/266

At limit-of-travel of motor or driven device

470
318/267

Dual control circuits alternately energized

31
318/261

With braking

43
318/262

And acceleration control

7
318/257

With running-speed control

172
318/260

And acceleration control

21
318/258

And braking

63
318/259

And acceleration control

18
318/268

Running-speed control

387
318/271

With acceleration control

52
318/272

With automatic starting and/or stopping

63
318/269

With braking

115
318/270

And acceleration control

49
318/34

Plural, diverse or diversely controlled electric motors

296
318/90

Acceleration control

14
318/91

Accelerating motors in succession or selectively

7
318/94

Armature or primary circuit control

6
318/95

Series-parallel connections

8
318/96

With armature circuit impedance

1
318/92

Control of both armature (or primary) and field (or secondary) circuits

3
318/93

Series-parallel connected armature or primary circuits

6
318/97

Field or secondary circuit control

2
318/86

Braking

24
318/87

Motor used as braking generator (dynamic braking)

41
318/88

Load or current division during braking

6
318/89

Motor as exciter for another motor

8
318/41

Having electrical synchronizing interconnections

115
318/44

Between induction motor secondaries

3
318/42

Between windings on auxiliary dynamo-electric machines

8
318/43

D.c. or a.c. commutator motors with slip rings

7
318/98

Load control

51
318/99

Fixed ratio of load or current division

20
318/100

By field or secondary circuit control

7
318/45

Mechanically coupled in fixed ratio of movement

46
318/48

Mechanically coupled in torque opposition

21
318/46

Motors having unlike operating characteristics

27
318/47

Synchronous and nonsynchronous motors

15
318/40

Motor biased against rotation

21
318/65

Motor-reversing

40
318/49

Motors electrically connected in cascade or tandem

107
318/50

With means for effecting other motor interconnections

37
318/35

Motors with diverse motions (e.g., reciprocating and rotary motors)

35
318/112

Parallel connected motors

106
318/38

Plural linear-movement motors

95
318/37

Plural reciprocating or oscillating motors

26
318/51

Plural, diverse motor controls for different motors

106
318/53

Plural, diverse motor controls

86
318/64

Acceleration control

16
318/63

Braking

38
318/54

Motor-reversing

57
318/58

And acceleration control

5
318/57

And braking

10
318/55

With running-speed control

43
318/56

And braking

16
318/59

Running-speed control

62
318/61

And acceleration control

15
318/62

And automatic starting and/or stopping and/or with time delay

38
318/60

And braking

34
318/105

Plural, diverse or diversely controlled sources of armature (or primary) supply

62
318/106

Diverse sources

38
318/107

A.c. and d.c.

36
318/108

Different voltages

27
318/110

Different frequencies

14
318/109

Different voltages

50
318/66

Running-speed control

137
318/82

Armature or primary circuit control

14
318/83

Series-parallel armature circuit connections

16
318/67

Diverse speeds for different motors

77
318/84

Field or secondary circuit control

9
318/68

Relative motor speed control

81
318/80

Armature or primary circuit control

11
318/79

Control of both armature (or primary) and field (or secondary) circuits

9
318/77

Controlling motor speed in response to speed of another motor

79
318/78

Controlling a.c. frequency or rate of electrical impulses to other motor

30
318/81

Field secondary circuit control

3
318/69

With speed-difference detector

28
318/76

Differential-gearing detector

3
318/70

Electrical-type detectors

8
318/72

Dynamoelectric machine detector

17
318/74

Synchronously actuated switch detectors

2
318/75

Plural switches connected in series

5
318/73

Synchronously operated impedance detectors

4
318/71

Voltage and/or current difference detector

39
318/113

Series connected motors

43
318/111

Series-parallel connected motors

47
318/52

Slipping and/or racing control for electric motors

124
318/101

Starting and/or stopping

36
318/104

Armature (or primary) circuit control

4
318/103

Selective starting and/or stopping

49
318/102

Sequential or successive starting and/or stopping

43
318/85

Synchronizing or phasing control

166
318/39

Work and feed motors (e.g., indexing)

102
318/17

Portable-mounted motor and/or portable-mounted electrical systems therefor

62
318/560

Positional servo systems (e.g., servomechanisms)

907
318/628

"feelback" systems

150
318/609

"reset" systems (p.i.)

349
318/610

With rate (p. i. d.) (e.g., reset windup prevention)

346
318/636

"sampling" systems including miscellaneous "sampled data" control systems

120
318/561

Adaptive or optimizing systems including "bang-bang" servos

780
318/637

Analog computation

12
318/630

Antibacklash systems (e.g., with unidirectional approach to balance)

123
318/631

Antistatic friction features (e.g., "dither" voltage)

35
318/600

Digital or numerical systems

319
318/604

Analogue comparison

44
318/605

Synchro or resolver (e.g., transmitter simulators)

108
318/601

Digital comparison

206
318/602

Commutating switch-type encoder

168
318/603

Pulse-counting systems

592
318/606

Frequency- or phase-modulated systems

129
318/607

Frequency comparison

78
318/608

Phase comparison

198
318/626

Limit or end-stop control

229
318/627

Secto-scanning systems

22
318/590

Multiple mode systems

101
318/596

Combined "on-off" and proportional control

28
318/592

Fine and coarse systems

112
318/594

Digital systems

133
318/595

Multiple speed synchro systems

19
318/593

Separate fine and coarse motors

45
318/597

Slewing systems

18
318/598

With a separate slewing motor

3
318/591

With mode-engagement features (e.g., manual to automatic)

67
318/625

Plural servomotors

338
318/567

Program- or pattern-controlled systems

601
318/569

Digital or numerical systems

529
318/570

Contouring systems

156
318/574

Multiple axes point to point systems

143
318/571

With "feed-rate" control

418
318/572

With "zero-offset" or tool radius correction

174
318/573

With interpolating means

281
318/575

Multiple axes analog systems

85
318/578

Cam or template followers

128
318/579

Multiple pass systems

20
318/576

Nonmechanical line, seam or edge followers

45
318/577

Optical or photoelectric line followers

150
318/568.1

With program recording or composing means

782
318/568.11

Multifunction manipulator (i.e., robot)

807
318/568.12

Mobile robot

829
318/568.17

With multimode control (e.g., course-fine, position-force, etc.)

191
318/568.18

Including velocity control

216
318/568.22

With particular compensation (e.g., gain, offset, etc.)

282
318/568.23

Including program modification

76
318/568.19

With particular coordinate transformation means

131
318/568.15

With particular interpolation means

155
318/568.13

With particular program teaching method

307
318/568.14

Manual lead through

108
318/568.16

With particular sensing device

479
318/568.2

With plural control systems (e.g., the interaction of plural processors to control the plural joints of a single robot):

277
318/568.21

Including end effector (e.g., gripping jaw, micromanipulator, etc.)

230
318/568.24

With reliability enhancement means (e.g., monitoring, redundant circuits, etc.)

103
318/568.25

Including display device

71
318/599

Pulse-width modulated power input to motor (e.g., "duty cycle" systems)

961
318/562

Time-sharing or multiplexing systems

104
318/629

Unwanted harmonic or voltage component elimination quadrature rejection systems

126
318/580

Vehicular guidance systems with single axis control

138
318/584

Altitude or pitch control

55
318/582

Celestial navigation

12
318/587

Land vehicles

534
318/583

Landing systems

15
318/588

Marine vehicles

86
318/589

Submarine and torpedo systems

9
318/581

Radio-controlled

57
318/585

Roll control

26
318/586

Yaw control

55
318/632

With compensating features

744
318/633

"two-cycle error" compensation

12
318/634

Temperature compensation

75
318/638

With particular "error-detecting" means

157
318/640

Photoelectric or optical-type measuring instruments

370
318/639

Plural, diverse conditions

18
318/651

With acceleration measuring instruments

38
318/650

With current, voltage or electrical power measuring instruments

87
318/644

With flow measuring instruments

17
318/645

With fluid pressure measuring instruments

28
318/646

With force or weight measuring instruments

77
318/648

With inertial, direction or inclination measuring instrument

134
318/649

Stable platforms

233
318/642

With liquid level measuring instruments

11
318/647

With magnetic field measuring instruments

36
318/643

With moisture content or wetness measuring instruments

12
318/652

With particular position measuring instruments

227
318/670

Contact resistance

3
318/656

Differential transformer systems

27
318/658

"e" type transformer

3
318/660

"inductosyn" systems

32
318/659

"microsyn" type

6
318/657

Linear differential transformer

38
318/661

Resolver systems

229
318/653

Magnetic transducers

137
318/663

Potentiometer systems including autotransformers and wheatstone bridges

110
318/665

Continuous rotation, unlimited range

6
318/666

Controlled tap and slidewire

19
318/664

Minor arc seeking

11
318/667

With a bridge in the feedback circuit

11
318/668

Recalibrating systems

6
318/669

Standing wave

2
318/654

Synchro control transmitter-transformer systems

50
318/655

With synchro differential

10
318/662

Variable capacitor systems

61
318/641

With particular temperature measuring instrument

38
318/671

With particular motor control system responsive to the "actuating signal"

92
318/685

"step-by-step" motors in closed-loop servos

1041
318/672

Discontinuous or "on-off" control

31
318/673

Seeking switch type

24
318/674

Wheatstone bridge type

11
318/687

Linear movement motors

263
318/675

One transmitter or controller element follows another

38
318/686

Reciprocating or oscillating motors

33
318/688

Shaded pole motors

2
318/676

Transmitter or controller element returned (e.g., force balance systems)

29
318/684

With particular modulator or detector (e.g., choppers)

19
318/683

With particular phase discriminator

8
318/677

With particular servoamplifier

38
318/678

Differential amplifier

64
318/679

Diverse types of amplifiers in different stage

7
318/680

Magnetic servoamplifiers

4
318/682

Rotating amplifier (e.g., "ward leonard" control)

2
318/681

Solid-state servoamplifiers

55
318/563

With protective or reliability increasing features (e.g., "fail-safe" systems)

275
318/564

"redundant" operating channels

113
318/566

Maneuver, force, or load-limiting

98
318/565

Monitoring systems

353
318/635

With signal-, voltage-, or current-limiting

60
318/611

With stabilizing features (e.g., anti-hunting, damping)

318
318/615

By auxiliary feedback loop

170
318/616

Rate feedback

177
318/618

Tachometer feedback

136
318/617

Variable rate feedback

41
318/624

By deadband at null (e.g., threshold circuits)

54
318/612

Electric braking near balance (e.g., dynamic)

27
318/613

D.c. in a.c. windings

4
318/614

Friction-braking near balance including magnetic or eddy current brakes

18
318/621

Lead or lag networks

100
318/622

A.c. networks

10
318/623

Load stabilization (e.g., viscous, magnetic or friction dampers)

94
318/620

Nonlinear circuits

21
318/619

Variable gain bandwidth

63
318/438

Power factor control of armature or line circuit

100
318/119

Reciprocating or oscillating motor

119
318/126

Energizing winding circuit control

32
318/127

Automatic in response to predetermined position, movement or condition in or of the motor or driven device

81
318/128

Noise, sound, vibration, movement or position of motor

165
318/134

By circuit making and/or braking devices

21
318/133

By impedance devices in energizing circuit

6
318/129

By means for producing periodic electrical pulses in the energizing circuit

48
318/130

Electrical oscillation or condenser charging and/or discharging circuits

43
318/131

Motor or escapement-controlled means

0
318/132

By space-discharge or unidirectionally conductive devices in energizing circuit

48
318/121

Having means to produce a progressing or traveling motor field flux

4
318/122

Plural, diverse or diversely controlled motor windings

23
318/123

Polyphase or diverse or diversely controlled sources of motor supply

14
318/124

A.c. and d.c. sources

12
318/125

Unidirectionally conductive devices in energizing circuit

4
318/120

Stopping after predetermined number of reciprocations or cycles (including single cycle)

9
318/725

Repulsion motor systems

14
318/726

With added motor winding or convertible to series motor

1
318/254

Self-commutated impulse or reluctance motors

2683
318/690

Self-synchronous type of motor

19
318/694

Having commutated dynamoelectric machine transmitter

4
318/695

Having commutating switch-type transmitter

14
318/693

Having impedance-type transmitter

3
318/692

Having induction or "selsyn" type transmitter

6
318/691

With means to amplify transmitter signals

5
318/246

Series motors

40
318/249

Control by motor circuit impedance

17
318/250

Impedance in series with field windings and in parallel to armature winding

14
318/247

Convertible for nonseries motor operation

11
318/251

Field circuit control

26
318/252

Plural, diverse or diversely connected or controlled field coils

18
318/248

With plural, diverse or diversely connected or controlled sources of e.m.f.

18
318/138

Space-discharge-device commutated motor

1487
318/16

Supplied or controlled by space-transmitted electromagnetic or electrostatic energy (e.g., by radio)

276
318/700

Synchronous motor systems

582
318/702

Antihunting or damping

57
318/720

Armature winding circuits

101
318/724

Having a plurality of windings or winding portions

106
318/722

Having electronic power conversion circuit

265
318/723

Having variable frequency supply

176
318/721

Responsive to rotor shaft position or speed

454
318/703

Braking

33
318/716

Field winding circuits

87
318/717

Responsive to a motor condition

85
318/718

Induced voltage in field winding

45
318/719

Speed responsive field power sources

47
318/701

Hysteresis or reluctance motor systems

611
318/704

Pole changing motor winding circuits

16
318/705

Synchronization systems

84
318/709

Having different armature voltage prior to synchronism

8
318/706

With armature power removal upon failure to synchronize or loss of synchronism

15
318/708

Responsive to thermal electrical element in system

9
318/707

Upon failure to resynchronize

5
318/710

With d.c. field removal

9
318/711

With electronic control element in system

22
318/712

With field excitation application

58
318/714

Responsive to armature current

46
318/715

Responsive to rotor speed or rotor driven member

83
318/713

Responsive to slip voltage frequency in d.c. field winding

20
318/543

Three-or-more-positions motor controller systems

9
318/551

Knee- or foot-operated controllers

37
318/548

Plural control stations

9
318/546

Plural, diverse or diversely controlled controllers

3
318/547

Plural control stations

6
318/552

Power-actuated controllers

7
318/555

Electromagnetic actuated

11
318/557

Intermittent or step-by-step operation

4
318/556

Reciprocating or oscillating electromagnetic means

9
318/553

Separately actuated controller contacts

5
318/554

Electromagnetic actuated

3
318/549

Return to "off", "starting" or "neutral" positions

15
318/550

Power-operated controllers

6
318/544

With other motor control device

5
318/545

Main line switch

3
318/689

Torquing motors

60
318/DIG.2

Windshield wiper controls

361
318/161

With flywheel or massive rotary member

65
318/3

With particular motor-driven load device

99
318/8

Plural, diverse or diversely controlled driving motors (e.g., driving differential gearing)

44
318/4

Plural, diverse or diversely controlled load device

31
318/5

Plural motor drive

33
318/9

Power- or motion-transmitting mechanism

119
318/15

Mechanical gearing

64
318/14

Motion-converting mechanism

49
318/10

Reversible drive mechanism

40
318/11

Variable speed mechanism

30
318/12

Gearing

43
318/13

Differential type

18
318/6

Tension-maintaining type of motor-control system

152
318/7

Plural, diverse or diversely controlled motors

154
318/490

With signals, meters, recorders or testing devices

359
 
 
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