Exposure counter disc mechanism for cameras
US4486083A · kind A · utility
3Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1982 |
| Grant date | Dec 4, 1984 |
| Priority date | — |
| Expiry date | Sep 7, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/36
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A camera is equipped with a back cover containing an exposure counter mechanism including a gear member in both frictional and gear toothed engagement with a film feeding sprocket of the camera. To accommodate films of different thickness and lengths, the cover is replacable with another having a different pressure plate, and the counter disc has indicia for counting up to 72 frames.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.