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Class Information
Number: 246
Name: Railway switches and signals >
Description: This class includes patents relating to the following means for the safeguard and control of traffic upon or across railways (that is, fixed tracks for occupant- controlled vehicles) or which by structure are especially adapted for such use, viz:










Class Number Class Name No. of Patents
246/217

Audible switch and signal indicators

5
246/20

Block-signal systems

14
246/27

Automatic

8
246/93

Combined fluid pessure and electric

0
246/94

Cab signal or train control

1
246/95

Track-circuit control

0
246/28R

Electric

36
246/28C

Ballast leakage

2
246/62

Cab signal or train control

19
246/75

Bridged insulated rail joint

1
246/73

Continuous contact

2
246/63R

Inductive

41
246/63C

Continuous

18
246/63A

Intermittent

5
246/74

Intermittent contact

1
246/72

Propulsion-current signaling

4
246/76

Track trip

2
246/64

Train-carried current supply

0
246/69

Intermittent contact

1
246/70

Rail circuit

2
246/71

Rail return

1
246/65

Multiple continuous contacts

2
246/66

Sectional

3
246/67

Single continuous contact

0
246/68

Sectional

1
246/28F

Checking circuits

18
246/77

Counting in and out

6
246/78

Ratchet wheel

1
246/79

Double opposed pawls

0
246/80

Parallel teeth

0
246/41

Direct current, normally closed, track circuit

3
246/46

Line-wire distant control

0
246/47

Cab signal or train control

1
246/48

Bridged insulated rail joint

0
246/49

Intermittent contact

3
246/50

Current characteristic

2
246/52

Home and distant

0
246/51

Overlapped blocks

0
246/53

Three position

0
246/42

Propulsion-current return

1
246/43

Varying

2
246/54

Single block

0
246/55

Cab signal or train control

0
246/57

Bridged insulated rail joint

1
246/56

Intermittent contact

1
246/44

Wireless distant control

7
246/45

Current reversal

3
246/58

Direct-current, normally open, track circuit

2
246/59

Cab signal or train control

4
246/60

Distant-signal control

1
246/28E

Economy use of line wire

2
246/28H

Intermittent light

0
246/28G

Light-out

1
246/87

Line-current supply

2
246/90

Car-actuated controller

1
246/91

Relay

0
246/88

Intermediate signal

0
246/92

Intermittent contact

1
246/89

Short sectional rail closure

0
246/31

Propulsion-current control

3
246/32

Current consumption

0
246/81

Propulsion-current signaling

1
246/83

Car-actuated controller

0
246/84

Trolley or plow

0
246/85

Intermittent contact

0
246/82

Rotary controller

0
246/29R

Radiant energy

11
246/29A

Electronic gaseous ionization devices

0
246/30

Hertzian wave

3
246/33

Single track

2
246/61

Superimposed propulsion current

3
246/86

Train-carried current supply

2
246/28K

Transformer

3
246/34R

Varying-current track circuit

104
246/34A

Approach control

13
246/34B

Coded circuits

35
246/34CT

Continuous track

41
246/34C

Insulation breakdown

4
246/39

Line-wire distant control

0
246/35

Propulsion-current return

2
246/36

Double rail

1
246/37

Impedance bond

9
246/34D

Saturable reactors

3
246/40

Single block

8
246/38

Wireless distant control

0
246/96

Electromechanical

0
246/97

Cab signal or train control

1
246/99

Clockwork

0
246/98

Track-circuit control

0
246/100

Fluid pressure

0
246/101

Cab signal or train control

1
246/102

Mechanical

0
246/103

Cab signal or train control

1
246/104

Manual

0
246/105

Electric

0
246/106

Lock and block

2
246/107

Recorders

6
246/21

Semi-automatic

1
246/22

Electromanual

3
246/23

Cab signal or train control

4
246/24

Circuit controllers

2
246/25

Lock and block

6
246/26

Track-circuit control

7
246/167R

Cab signal or train control

229
246/177

Block entrance initiated

6
246/178

Electric or magnetic control

5
246/179

Bridged insulated rail joint

0
246/180

Cab-circuit controller

1
246/181

Mechanical actuation

1
246/170

Derailment

7
246/171

Contact trips

2
246/172

Frangible

6
246/173

Inertia trips

2
246/189

Engineer's brake-valve actuation

1
246/174

Highway or station, automatic

1
246/175

Code signal

0
246/167M

Magnetic rail

4
246/183

Manual-control systems

3
246/186

Motive-power control

15
246/187R

Electric

44
246/187C

Control of vehicle from leading vehicle

62
246/187B

Non-mechanical control of vehicles from wayside

101
246/187A

Remote control

87
246/188

Fluid-pressure-actuated throttle

0
246/185

Recording devices

6
246/184

Service stop

4
246/182R

Speed-control systems

132
246/182B

Automatic vehicle-carried braking

104
246/182C

Automatic vehicle-carried speed comparison circuits

62
246/182BH

Humped, unpowered cars

5
246/182A

Track brake speed control

35
246/182AB

Yard-switching, centralized

7
246/182AA

Yard-switching, dispersed

5
246/176

Switch signals

12
246/201

Track trips

6
246/202

Electric or magnetic

4
246/206

Fixed

2
246/205

Lateral motion

1
246/203R

Pivoted

3
246/203E

Horizontal pivot, vertical rod, strike rod perpendicular

1
246/203C

Single horizontal pivot on which track trip turns

1
246/203D

Single horizontal pivot; strike rod transverse of track

1
246/203A

Single vertical pivot on which track trip turns

0
246/203B

Single vertical pivot; strike rod transverse of track

0
246/207

Portable

4
246/204

Vertical motion

6
246/167A

Train approach warning for work cars

8
246/169R

Train defect

89
246/169A

Hot bearing detectors

54
246/169D

Radiant energy type

25
246/169S

Sound detectors

12
246/192R

Train mechanism

2
246/193

Electric or magnetic

8
246/196

Cab-circuit controller

5
246/197

Magnetically actuated

7
246/194

Inductive

24
246/195

Intermittent contact

1
246/199

Frangible

1
246/200R

Lever actuated

1
246/200A

Lever perpendicular inclined less than 45 degree

0
246/200B

Lever transverse relative to direction of travel

0
246/198

Single-direction actuation

0
246/192A

Train-carried electric contact mechanism

1
246/168

Train parting

4
246/190

Train-pipe-valve structure

1
246/167D

Vehicle-vehicle distance measuring

19
246/191

Visual cab signals

7
246/168.1

Wheel slip

10
246/208

Car-displayed crossing signals

1
246/375

Continuous-rail crossing

2
246/379

Movable point

0
246/376

Overlapped main

0
246/377

Pivoted rail

1
246/378

Rotary block

0
246/380

Sliding rail

3
246/381

Longitudinal

0
246/454

Crossings, frogs, and mates

22
246/463

Bolted

8
246/460

Central inserts

12
246/461

Cast bound

1
246/465

Crossings

14
246/467

Chairs

0
246/466

Street and steam

0
246/472

Details

22
246/457

Flange-supported wheel

1
246/458

Frogs

10
246/468

Frogs

42
246/470

Clamped

5
246/471

Composite

3
246/469

Unbroken main

3
246/459

Hot filled

0
246/455

Outer-tread-supported wheel

3
246/462

Plate or plate bolted

2
246/464

Solid

1
246/456

Tread guard rail

6
246/118

Drawbridge protection

4
246/119

Cab signal or train control

2
246/218

Electric actuation

7
246/246

Car-actuated circuit controllers

25
246/249

Electric or magnetic

54
246/248

Retarded action

0
246/250

Single-direction actuation

0
246/252

Trolley or plow actuated

3
246/251

Vertically sprung rail

0
246/247

Wheel or train counting

33
246/245

Car-actuated generators

4
246/255

Car-wheel-completed circuits

10
246/219

Control circuits

31
246/221

Motor systems

9
246/224

Home and distant signals

1
246/225

Reciprocating armature

2
246/236

Alternate throw

0
246/226

Controller-actuated switches

2
246/230

Alternate throw

0
246/227

Opposed magnets

5
246/228

Circuit changers

0
246/229

Tandem contacts

0
246/237

Fly-back

0
246/238

Latch or clutch release

0
246/239

Switches

2
246/231

Opposed magnets

3
246/232

Circuit changers

1
246/234

Parallel contacts, switches

1
246/235

Circuit controller

0
246/233

Tandem contacts, switches

0
246/222

Return-indication-current generation

0
246/240

Rotary armature

1
246/242R

Circuit changers

2
246/242B

Dual selector circuit

0
246/242C

Remote lever, local selector

0
246/242A

Overload release

0
246/243

Fly-back

0
246/244

Latch or clutch release

0
246/241

Opposed motors

0
246/223

Three-position signals

0
246/256

Relays

0
246/253

Switch or signal actuated controllers

21
246/220

Switch signals

58
246/254

Trolley-completed circuits

0
246/125

Electric automatic highway signals, mine doors, and gates

74
246/126

Car-actuated controller

26
246/127

Gates and doors

21
246/130

Normally closed track circuit

9
246/128

Normally open track circuit

16
246/129

Short sectional rail closure

1
246/257

Fluid-motor actuation

15
246/258

Electric control

17
246/259

Car-controlled switches

1
246/261

Gates

5
246/260

Signals

4
246/111

Grade-crossing track protection

18
246/113

Automatic

4
246/114R

Electric

3
246/115

Cab signal or train control

10
246/114A

Cross-over protection

2
246/116

Fluid pressure

0
246/117

Cab signal or train control

3
246/112

Semi-automatic

0
246/131

Interlocking

13
246/160

Approach locking

0
246/163

Derails

10
246/159

Detached locking, check locking, or key control

2
246/132

Electric actuation

2
246/133

Electric locking

2
246/135

Return-release indication

0
246/134

Route locking

9
246/136

Mechanical locking

0
246/137

Return-release indication

1
246/138

Locked slide

0
246/139

Fluid-pressure actuation

0
246/140

Electrically controlled valve

1
246/141

Return-release indication

0
246/142

Return-release indication

0
246/143

Manual actuation

1
246/146

Electrical locking

3
246/147

Mechanical locking

0
246/152

Compensators

0
246/153

Counterweight

0
246/154

Intermittent grip

0
246/151

Detector bars

0
246/148

Preliminary

0
246/149

Tappets

0
246/155

Rod-saving devices

0
246/156

Selectors

0
246/157

Electric

0
246/158

Switch and lock movements

1
246/150

Tappets

0
 

Switch stands

 
246/144

Signal-actuating

0
246/145

Double lever

0
246/161

Retarded-release mechanism

0
246/162

Switch or signal indicators

15
246/489

Manual actuation

7
246/262

Mechanical-motor actuation

3
246/263

Electric control

3
246/1R

Miscellaneous

41
246/1C

Signals and indicators

59
246/209

Passengers' station signals

1
246/166

Pilot or signal cars

6
246/264

Point throwers

1
246/265

Magnetic

2
246/266

Modifier switch

0
246/267

Directing-grooves

0
246/269

Sliding shoe

0
246/268

Wedging wheel

0
246/DIG.1

Radiant energy devices

3
246/120

Roadway-defect protection

21
246/121

Electric

54
246/374

Safety sidings

1
246/166.1

Signalling between occupants of a train

10
246/473R

Signals

30
246/486

Bridge warnings

1
246/475

Dwarf or pot

0
246/478

Enclosed

0
246/473.1

Highway crossing

41
246/473.2

Wigwag type

6
246/473.3

Light beam projecting

21
246/477

Roadway, visual, and portable

16
246/479

Semaphore

2
246/482

Arms

0
246/483

Illuminated

0
246/481

Home and distant

0
246/484

Lamp and spectacles

2
246/485

Post mechanism

1
246/480

Upper quadrant

0
246/476

Switch or switch stand

27
246/487

Torpedoes

0
246/473A

Toy rail signals

10
246/474

Track reflectors

5
246/488

Trainmens' kits

6
246/164

Slotting and control

0
246/165

Electric

0
246/19

Staff and tablet systems

0
246/393

Switch stands

24
246/404

Adjustable throw

3
246/394

Cab signal or train control

1
246/406

Gear actuated

11
246/401

Rail lock and position indication

10
246/402

Transverse rotary locking shaft

0
246/395

Resetting

0
246/399

Detention devices

0
246/397

Hand restrained

0
246/400

Key retaining

0
246/396

Latch release, automatic

1
246/398

Vehicle restrained

0
246/405

Spiral-cam actuated

2
246/407

Structural types

5
246/408

Depressed mechanism

0
246/409

High semaphore stands

0
246/412

Horizontal lever

1
246/413

Drop arm

1
246/414

Automatic key-lock

1
246/410

Vertical lever

9
246/411

Ground stands

3
246/403

Three and multiple throw

0
246/382

Switch-connected frogs

16
246/388

Center-pivoted rail

3
246/387

End-pivoted rail

3
246/383

Overlapped main

2
246/384

Double rail

0
246/389

Swinging rail

6
246/390

Opposed swing

0
246/391

Wing

8
246/385

Swinging tongue

9
246/386

Stub end

0
246/392

Transversely sliding rail

8
246/415R

Switches

67
246/453

Chairs and plates

30
246/419

Conduit, third rail or trolley

19
246/452

Connecting rods

24
246/423

Facing, rerailing

0
246/424

Facing, selective

1
246/426

Modified wheel

0
246/425

Side draft

0
246/434

Flexible rail

13
246/417

Frog obviating

1
246/418

Single ral

2
246/448

Lock

37
246/420

Nonderailing, trailing

2
246/422

Moving guard rail

1
246/421

Risers

0
246/431

Oscillating, longitudinal axis

10
246/429

Overlap

2
246/435R

Point

28
246/435A

Guard

4
246/438

Point and mate

3
246/436

Recessed rail

5
246/437

Renewable and reenforced

3
246/439

Tandem

1
246/440

Three throw

0
246/442

Tongue

12
246/443

Bed lock

10
246/444

Self-cleaning

3
246/441

Tread guard rail

2
246/432

Risers

3
246/430

Sliding

21
246/416

Slip

0
246/428

Snow protected

33
246/427

Stationary turnout

4
246/445

Stub

2
246/447

Anti-creep or jar

1
246/446

Double rail

1
246/449

Tie bars

14
246/450

Adjustable

13
246/451

Eccentric

2
246/415A

Toy

31
246/433

Vertical motion

5
246/DIG.2

Thermal sensing devices

8
246/108

Time indication, automatic

4
246/109

Flow retarded

0
246/110

Time limit expired

1
246/210

Torpedo mechanism

0
246/215

Car attached

0
246/211

Electric

0
246/216

Hand placing devices

1
246/212

Magazine

0
246/214

Rotary

1
246/213

Vertical

1
246/2R

Train dispatching

40
246/3

Central signal control

58
246/4

Cab signal or train control

36
246/5

Selective

66
246/2F

Frequency

3
246/2E

Orientation

1
246/2S

Spacing

5
246/14

Station, block, or train-order signals

11
246/18

Double semaphore

0
246/17

Rotary, vertical axis

0
246/15

Safety systems

8
246/16

Holders

1
246/7

Train telegraphy or telephony

10
246/9

Continuous contacts

1
246/12

Instruments in series

1
246/10

Traction rail return

2
246/11

Multiple contact

0
246/13

Emergency signal stations

1
246/8

Inductive

12
246/6

Train-order cab signal or train control

22
246/122R

Train-position indication

226
246/123

Automatic time recording

1
246/122A

Miniature model

30
246/124

Train annunciators or indicators

28
246/270R

Vehicle-energy actuation

6
246/270A

Automatic switch actuation from or by vehicle

2
246/277

Automatic turnouts

0
246/273

Continuous-rail crossings

1
246/275

Continuous-rail frogs

4
246/276

Spring rail

13
246/271

Fluid transmission

3
246/272

Gates

3
246/292

Signals and gates, automatic

20
246/293

Highway crossing

34
246/295

Audible

4
246/296

Bells, single stroke

2
246/294

Visual and audible

12
246/297

Track mechanism

4
246/299

Latch or clutch release

0
246/300

Electric

0
246/301

Longitudinal motion

0
246/302

Vertical motion

0
246/311

Longitudinal motion

0
246/312

Rectilinear

0
246/303

Longitudinal spiral cam

0
246/310

Parallel swing

0
246/298

Single direction

0
246/304

Vehicle-restrained gates and doors

2
246/306

Longitudinal motion

0
246/305

Parallel swing

0
246/307

Vertical motion

1
246/308

Swinging

0
246/309

Yielding rail

0
246/313

Vertical motion

1
246/358

Switch locks, automatic

3
 

Switch stands, automatic

 
246/278

Facing setting

0
246/279

Manual control

0
246/280

Resetting

0
246/281

Vehicle restrained

1
246/282

Trailing setting

0
246/283

Yielding rail

0
246/290

Trailing fly-back

0
246/291

Spring actuated

1
246/284

Trailing setting

1
246/285

Yielding rail

0
246/288

Counterweight

0
246/289

Frangible

0
246/286

Spring-clutch

0
246/287

Coaxial spring

0
246/274

Switch-connected frogs

6
246/314

Switches, automatic

2
246/317

Facing setting

0
246/315

Resetting, vehicle restrained

0
246/322

Track mechanism

3
246/327

Alternate throw

1
246/328

Tappet wheel

0
246/335

Bow spring

0
246/332

Cable and pulley connection

0
246/326

Electric control

2
246/324

Latch or clutch release

0
246/325

Electric control

0
246/336

Longitudinal motion

0
246/341

Horizontal swing

0
246/342

Double acting

0
246/343

Double

1
246/339

Perpendicular swing

0
246/340

Double

0
246/338

Track-mechanism depression

1
246/337

Train-trip elevation

0
246/333

Longitudinal sprial cam

0
246/334

Rack and pinion

0
246/331

Rotary longitudinal connecting shaft

0
246/323

Selective

1
246/329

Three and multiple throw

0
246/330

Traffic protected

0
246/344

Transverse motion

2
246/350

Double acting

0
246/345

Duplex lever

0
246/346

Swinging

0
246/347

Double acting

0
246/348

Guiding tail

1
246/349

Double

0
246/351

Vertical motion

1
246/356

Double

0
246/357

Transverse lever connection

0
246/352

Duplex lever

0
246/353

Swinging

0
246/354

Double acting

0
246/355

Double

0
246/319

Trailing fly-back

0
246/320R

Spiral spring

1
246/320A

Dash pot

0
246/321

Tie or connecting rod

0
246/318

Trailing setting

1
246/316

Wheel resetting

0
246/359

Train trips

0
246/360

Electric or magnetic

0
246/361

Fluid pressure

1
246/363

Hooks

0
246/371

Lateral motion

0
246/373

Rod

0
246/372

Wheel

0
246/365

Pivoted

0
246/367

Rod

0
246/366

Wheel

0
246/364

Racks or friction bars

0
246/362

Resilient

0
246/368

Vertical motion

0
246/370

Rod

1
246/369

Wheel

1
 
 
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