| Patents for B61L 23 - Control, warning or like safety means along the route or between vehicles or vehicle trains (3,391) |
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| 09/11/1984 | CA1174349A1 Decoupling arrangement for non-insulated ac track circuits in railway systems |
| 09/05/1984 | EP0117763A2 Train with forerunner |
| 08/30/1984 | WO1984003264A1 Method for the transmission of informations and/or instructions |
| 08/21/1984 | US4467430 Railway track circuit |
| 08/15/1984 | EP0116021A1 Switch mechanism |
| 07/17/1984 | CA1171162A1 Railway track circuit with switching means |
| 05/01/1984 | CA1166727A1 Vehicle collision avoidance system |
| 03/06/1984 | CA1163145A1 Driverless vehicle with speed control cam |
| 02/21/1984 | US4432517 Circuit for detecting unbalance of the traction current in a track circuit |
| 02/21/1984 | CA1162631A1 Audio frequency track circuit for rapid transit applications with signal modulation security |
| 02/21/1984 | CA1162630A1 Dual signal frequency motion monitor and broken rail detector |
| 12/20/1983 | CA1159004A1 Code-setting system for a conveyor |
| 11/22/1983 | US4417229 Means for use on a railroad to distinguish between traction current and signal current |
| 10/04/1983 | CA1154831A1 Signal-powered receiver |
| 07/12/1983 | CA1149918A1 Frequency modulated railroad track circuit |
| 07/06/1983 | EP0083147A2 Material handling and sorting system |
| 06/29/1983 | EP0082687A2 Railway signalling receiver |
| 06/21/1983 | US4389033 Broken rail/bond detectors |
| 05/04/1983 | EP0077839A1 Device for actuating points whilst operating an underground rail track |
| 04/13/1983 | EP0076672A2 Control system for controlling the passage of vehicles |
| 04/13/1983 | EP0076336A1 Warning device, in particular for working sites within the range of an underground track |
| 04/12/1983 | US4379497 Vehicle collision avoidance system |
| 02/15/1983 | US4373691 Decoupling arrangement for non-insulated AC track circuits in railway systems |
| 01/25/1983 | US4369942 Signal control system |
| 01/04/1983 | CA1138972A1 Railroad signal control system |
| 12/28/1982 | US4365777 Train approach detector |
| 11/02/1982 | US4357562 Device for automatically selecting the speed of a self-propelling moving body |
| 10/05/1982 | US4352475 Audio frequency track circuit for rapid transit applications with signal modulation security |
| 09/14/1982 | US4349170 Safety coding process for track circuits |
| 09/07/1982 | US4347792 Driveless vehicle with speed control cam |
| 09/07/1982 | CA1131336A1 Automatic block control system for self-propelled vehicles |
| 08/10/1982 | CA1129507A1 High power audio frequency transmitter |
| 07/06/1982 | CA1127287A1 Technique for the detection of flat wheels on railroad cars by acoustical measuring means |
| 06/15/1982 | US4335432 Optimal vehicle following control system |
| 05/26/1982 | EP0052263A1 Device to keep track-bound vehicles at a distance from one another |
| 05/25/1982 | US4331959 Method and apparatus for detecting a defective object on a lane or track |
| 04/28/1982 | EP0050535A1 Railway track circuit |
| 02/02/1982 | US4314374 High power audio frequency transmitter |
| 02/02/1982 | US4314306 Signal-powered receiver |
| 12/22/1981 | US4306694 Dual signal frequency motion monitor and broken rail detector |
| 10/28/1981 | EP0038639A1 A circuit for detecting unbalance of the traction current in a track circuit |
| 10/27/1981 | US4296901 Transportation systems |
| 08/04/1981 | CA1106209A1 Anti-collision device for passive vehicles |
| 06/10/1981 | EP0030207A1 Failsafe clear-track signalling device |
| 05/05/1981 | CA1100594A1 Broken rail detecting track circuits |
| 04/21/1981 | US4262599 Conveyor system with a maintenance station |
| 03/11/1981 | EP0024978A1 Method and system for detecting landslip(s) on railways |
| 02/04/1981 | EP0023443A1 Automatic speed selection device for a self-propelled vehicle |
| 01/20/1981 | US4245561 Controllable distributing conveying systems |
| 01/20/1981 | CA1094204A1 Conveyor system control circuit |
| 12/23/1980 | CA1092229A1 Protective device for railroad signaling apparatus |
| 12/10/1980 | EP0019973A1 Method for the traffic management of automotive wire-guided vehicles |
| 10/14/1980 | US4227666 Block control system for self-propelled vehicles |
| 10/14/1980 | CA1087696A1 Signal amplifier apparatus with fail-safe limited gain |
| 09/30/1980 | CA1086848A1 Track signalling system |
| 07/23/1980 | EP0013521A1 Transmitting device for coded track circuits |
| 07/01/1980 | US4210084 Anti-collision device for passive vehicles |
| 06/10/1980 | US4207569 Railroad radio frequency waveguide |
| 01/29/1980 | US4185561 Automatic switching system |
| 07/31/1979 | CA1059603A1 Railroad traffic control signaling system |
| 04/04/1979 | EP0001229A1 System for directing conveying devices to a maintenance station |
| 03/20/1979 | US4145018 Protective device for railroad signaling apparatus |
| 01/09/1979 | US4133505 Railway safety system using intensity of current |
| 12/12/1978 | US4129276 Technique for the detection of flat wheels on railroad cars by acoustical measuring means |
| 12/05/1978 | US4128218 Method of direction finding and direction indication of railbound vehicles |
| 10/31/1978 | CA1041631A1 Arrangement for measuring the distance between two successive objects |
| 09/26/1978 | US4117529 Broken rail detecting track circuits |
| 09/05/1978 | CA1038072A1 Train vehicle protection apparatus including signal block occupancy determination |
| 05/16/1978 | US4089269 Vehicle control system |
| 04/18/1978 | CA1029829A1 Anti-collision device for moving vehicles |
| 04/11/1978 | US4083309 Continuous transport systems |
| 02/21/1978 | US4074879 Track signalling system |
| 01/17/1978 | US4068597 Conveyor system control circuit |
| 12/20/1977 | US4063699 Fail-safe block control system for driverless vehicles |
| 11/01/1977 | US4056063 Dispatcher for conveyor system |
| 08/16/1977 | US4042888 Signal amplifier apparatus with fail-safe limited gain |
| 05/17/1977 | US4023754 Fail-safe separation of driverless vehicles |
| 05/17/1977 | US4023753 Vehicle control system |
| 05/10/1977 | US4022407 Railroad traffic control signaling system |
| 03/29/1977 | US4014503 Method and apparatus for control of central spacing of track-operated vehicles |
| 03/15/1977 | US4012019 Car signaling system |
| 01/11/1977 | US4002314 Train vehicle speed control signal providing apparatus |
| 10/05/1976 | US3984073 Antenna apparatus for vehicle track rail signals |
| 09/07/1976 | US3979092 Sequential occupancy release control method and apparatus for train vehicles |
| 08/17/1976 | US3974991 Railroad motion detecting and signalling system with repeater receiver |
| 06/22/1976 | US3964702 Anti-collision safety device for a passenger transport system on tracks |
| 06/15/1976 | US3963201 Sequential occupancy release control method and apparatus for train vehicles |
| 05/25/1976 | US3958781 Train vehicle protection apparatus including signal block occupancy determination |
| 04/27/1976 | US3952977 Electrical detective circuits |
| 02/10/1976 | US3937427 Cab signal control circuits for railroad interlockings |
| 01/27/1976 | US3935559 Transporter systems |