Shutter mechanism for camera
US4505568A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1983 |
| Grant date | Mar 19, 1985 |
| Priority date | — |
| Expiry date | Aug 23, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A shutter mechanism for a camera comprises at least one shutter blade, an electromagnet for holding the shutter blade in a blocking position where an exposure aperture is concealed and another electromagnet for returning the shutter blade to the initial and blocking position. The holding electromagnet is energized in association with the shutter actuating operation to permit the shutter blade to move, initiating exposure. The shutter blade in the course of movement to an unblocking position is forced to be returned to the initial and blocking position by the returning electromagnet when the latter is energized and the held therein by the holding electromagnet which has been deenergized, terminating exposure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.