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| Number | Title | Issue Date |
| 7191986 | Device for mechanically and electrically checking the switching device of a railway switch machine In a device for checking the operation of devices (4) used to displace movable switch parts (2, 3), in which the movable switch parts (2, 3) are connected with each other by a coupling rod (13), the coupling rod (13) is comprised o... | 03/20/2007 |
| 7168662 | Hollow tie railroad switching assembly A switching assembly includes a pair of hollow ties, a pair of supports, and a linkage. The linkage extends generally through the hollow ties, whereby the cribs are generally free of linkage components, and the ballast in the cribs can be compacted with known automa... | 01/30/2007 |
| 6556898 | Distributed track network control system A distributed control system for a track network includes a local controller connected to a plurality of switch machines and a central office. The local controller receives from each switch machine a switch position signal and outputs to at least one swit... | 04/29/2003 |
| 6164600 | Device for detecting the positions of pivotable parts of a point Device for detecting the positions of pivotable parts of a rail switch, such as, e.g., tongue rails (1, 2) by at least one sensor designed as a continuous distance sensor (4,5,6,7), wherein the sensor output is connected to a circuit arrangement (10) for ... | 12/26/2000 |
| 5253830 | Method for monitoring the condition of rail switch points In a method for monitoring the condition of rail switch points and for detection of premature abrasive wear-and-tear in the region of the tongue switching rail (3) of the points, the signals from at least one proximity sensor (2) in the region of the tong... | 10/19/1993 |
| 5192038 | Safety detector for railroad switch points with visual indicator mechanism A safety detector for a railroad switch point having a detector mechanism which is to be secured to a stockrail at the switch point where the stockrail is intended to be in contact with a corresponding switchrail, in which the detector mechanism is adjust... | 03/09/1993 |
| 5116006 | Safety detector for railroad switch points with remote contact mechanism A safety detector for a railroad switch point having detector mechanism which is to be secured to a stockrail at the switch point where the stockrail is intended to be in contact with a corresponding switchrail, in which the detector mechanism is adjustab... | 05/26/1992 |
| 5096147 | In-circuit contact monitor An in-circuit contact monitor for providing reliable and safe detection of the position of fail safe, or vital, circuit contacts in railroad signaling and inter-locking control circuits comprises an impedance network arranged in a bridge configuration, a ... | 03/17/1992 |
| 4114844 | Tongue switch for rail installations Tongue switch positioning is monitored by circuitry to indicate the switch is obstructed.... | 09/19/1978 |
