Railroad signal with remote light source
US5639047A · kind A · utility
2Cited by
4References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 10, 1996 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | May 10, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61L29/24
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An apparatus for providing a light signal to a signal unit at an overhead location along a railway signal structure, particularly a cantilever signal structure having a vertical mast and an arm assembly extending therefrom. Signal units may be located along the mast and/or the arm assembly. A light source is provided at or near ground level so as to be readily accessible by a maintainer and is connected by fiber optic cable to the signal units. Thus, light produced by the light source travels through the optical fiber to the signal units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.