Shutter device for a photographic camera
US3956761A · kind A · utility
8Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1974 |
| Grant date | May 11, 1976 |
| Priority date | — |
| Expiry date | Jul 17, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/58
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A shutter device for a photographic camera has a pair of shutter blade members movable between first and second rest positions for opening or closing the camera aperture, including drive devices associated with the blade members for moving them in the same direction during an exposure sequentially and at a time interval, from the first to the second rest position. Additional drive devices associated with the shutter blade members are provided which, for a subsequent exposure, are capable of returning the blade members sequentially and at a time interval, in opposite direction, from the second to the first rest position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.