Shutter for a single lens reflex camera
US5028946A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1990 |
| Grant date | Jul 2, 1991 |
| Priority date | — |
| Expiry date | Jun 18, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A shutter for a single lens reflex camera, comprises a drive gear rotatable in opposite directions by a motor and having a non-tooth portion, a control gear directly or indirectly engageable with the drive gear, shutter blades driven by the control gear to open and close a shutter opening, and a spring for constantly biasing the control gear in a direction to close the shutter opening. Upon rotation of the drive gear, the control gear is rotated to face the non-tooth portion of the drive gear whereby the shutter blades are moved under the action of the spring to close the shutter opening. When the control gear is brought into meshing engagement with the drive gear, the shutter blades are rendered operative to open and close the shutter opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.