Shutter
US4724452A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1986 |
| Grant date | Feb 9, 1988 |
| Priority date | — |
| Expiry date | Nov 3, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/36
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A shutter is disclosed for use as a high-speed shutter in a camera or an electronic device. The shutter comprises a planar aperture blade which is mounted for reciprocative movement. The aperture blade includes a coil which is part of an electromagnetic actuator. A permanent magnet is mounted adjacent the blade for interaction with a magnetic field produced by the coil. In order to provide for a low-friction support, the aperture blade is supported on flexible connectors located on opposite sides of the blade. A current of one polarity is supplied to the coil to move the aperture blade in one direction, and the polarity of the current is reversed to move the blade in the opposite direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.