Camera system with means for detecting the condition of back-up power supply
US5041861A · kind A · utility
1Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1990 |
| Grant date | Aug 20, 1991 |
| Priority date | — |
| Expiry date | Jun 18, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A camera with circuitry, a main power source for supplying electric power to the circuitry, a back-up power source for supplying electric power to the circuitry independently from the main power source, a detector for detecting the condition of the back-up power source to produce a warning signal when the back-up power source can not supply sufficient electric power to the circuitry, starting the operation of the detector when the main power source has recovered, setting data to the circuitry in accordance with a manual operation and interrupting the operation of the warning signal when the data setting is operated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.