Photographic camera with electromagnetic actuator of the shutter segments
US4012751A · kind A · utility
3Cited by
6References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 29, 1975 |
| Grant date | Mar 15, 1977 |
| Priority date | — |
| Expiry date | May 29, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/58
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographic camera shutter is moved to open and returned to its closed position by electromagnetic actuating means. A special electronic circuit is connected with said actuating means to energize the electromagnetic device with sufficient potential to cause a smooth and rapid opening movement which then decreases to a lower potential during the time interval that the shutter is to be maintained in its open position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.