Method and apparatus for detecting interruptions in the transmission of light signals
US4491984A · kind A · utility
2Cited by
1References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1983 |
| Grant date | Jan 1, 1985 |
| Priority date | — |
| Expiry date | Feb 24, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/186
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method and apparatus for the detection of interruptions of light signal transmissions are disclosed, wherein on simultaneously sending light signals, from an emitter to a receiver, light signals pass through a loop of fiber optics, and a direct circuit comprised of a transparent block. The detection of interruptions of light signal transmission is subject to cessation of simultaneous receipt of a first signal and a second signal normally received by the receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.