Light responsive device for monitoring on-line indicator lights
US4990896A · kind A · utility
7Cited by
9References
35Claims
0Family size
Inventor
Key dates
| Filing date | May 9, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | May 9, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B29/10
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A photovoltaic device is provided that is adapted to monitor an "on-line" light source and respond to on/off changes of the source while at the same time being adapted for visual inspection of the light. The device is adapted for incorporation into a remote warning system which may also be able to activate remedial measures to correct deviations signalled by a change in the "on-line" light status.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.