An improved safety system used to determine the present position of a car riding on railroad tracks that provides data to control signals, such as flashing lights, and crossing gates at railroad grade crossings in order to prevent accidents with vehicles or persons.
Control system for signals at railroad grade crossings
2021-12-21
Patent
Electronic Resource
English
IPC: | B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC |
Engineering Index Backfile | 1895
|Engineering Index Backfile | 1895
Engineering Index Backfile | 1895
|Engineering Index Backfile | 1889
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