Photographic operation control circuit for camera
US4458996A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1979 |
| Grant date | Jul 10, 1984 |
| Priority date | — |
| Expiry date | Dec 20, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B19/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In the disclosed camera exposure control, data recording and film winding are performed sequentially and the system is protected from battery voltage drop arising from the effective increase in consumption of electrical energy necessary to make each exposure as compared with the ordinary camera, by detecting the battery level upon occurrence of a prescribed phase of the operating cycle. In one embodiment, the battery is also checked at a subsequent step of the cycle (for example, film winding operation is permitted only when the battery level is above the predetermined level). According to an embodiment of the invention, a sequence control circuit controls the photographic operation sequentially.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.