Train detection
US7523893B2 · kind B2 · utility
17Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2005 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Oct 16, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61L1/18
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A train detection mechanism for detecting the presence of a train on a section of track, the track section including first and second rails 1, 2 and delimited by first and second ends thereof, includes current injector for injecting current into the first rail at the first end of the section and current receiver for receiving current from the second rail at the first end of the section, and a shunt 3 connected between the first and second rails at the second end of the section, characterized in that the shunt includes a switch 4 for controlling current flow through the shunt, the switch being operable by the passage of a train.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.