Electrical power supply circuit in a camera
US4636056A · kind A · utility
9Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1984 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | Oct 4, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B7/26
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a camera where the light metering circuit is supplied with electrical power by pushing the shutter release button to a first stroke, an electrical power supply circuit is constructed in such a way that when the time for which the shutter release button remains at the first stroke exceeds the prescribed period of time, the electrical power supply is stopped, and then when the release button is pushed down further to a second stroke, the electrical power supply starts again.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.