Electromagnetically driven shutter
US4373797A · kind A · utility
7Cited by
3References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Oct 5, 1981 |
| Grant date | Feb 15, 1983 |
| Priority date | — |
| Expiry date | Oct 5, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electromagnetically driven shutter, wherein between the electromagnetic driving source and the shutter blade actuating member which receives the driving force from the driving source a play is provided in such a manner that after the electromagnetic driving source has run a certain determined distance the driving force is transmitted to the shutter blade actuating member so as to let the shutter blade start to run.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.