Electromagnetic release shutter
US4364654A · kind A · utility
11Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1981 |
| Grant date | Dec 21, 1982 |
| Priority date | — |
| Expiry date | Jul 1, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a shutter of the electromagnetic release type arranged to have shutter blades locked by locking members in their charged states and to make an exposure by releasing the shutter blades from the locking members, a first locking member is arranged to lock each of the charged shutter blades while a second locking member is arranged to lock the shutter blade when the shutter blade is released from the first locking member and to have the shutter blade released therefrom by the action of an electromagnet. The releasing torque required for the second locking member is smaller than that of the first locking member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.