Apparatus for controlling film advancement in a camera
US4371244A · kind A · utility
5Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1981 |
| Grant date | Feb 1, 1983 |
| Priority date | — |
| Expiry date | Jan 30, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/36
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a camera having a film transport mechanism for advancing and rewinding film and a counter for counting the number of frames of film advanced, a first control device operatively coupled to the counter controls the transport mechanism so as to prevent further film advancement upon the counter reaching a predetermined count. Upon the transport mechanism being operated to rewind the film, a second control device automatically disables the first control device so as to enable further film advancement by the transport mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.