Electromagnetic drive device
US4466723A · kind A · utility
13Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1982 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Sep 15, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/22
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In the disclosed camera drive device, a driver electromagnetically driven by coils opens and closes shutter blade members and other exposure members. A holding arrangement holds the blade members closed while the driver controls the other exposure members and a control arrangement actuates the holding arrangement independently of the operating condition of the driver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.