Shutter device in a camera
US4164370A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1977 |
| Grant date | Aug 14, 1979 |
| Priority date | — |
| Expiry date | Oct 18, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/34
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A shutter device in a camera which effects photography with shutter curtains maintained open for a predetermined time comprises a rotatable member for normal rotation by a spring, shutter opening formation means operatively associated with the rotatable member to move in a direction to form a shutter opening with normal rotation of the rotatable member and to move in a direction to close the shutter opening with reverse rotation of the rotatable member, a motor, control means operatively associated with the motor to be displaceable to a first position in which it blocks normal rotation of the rotatable member and maintains the shutter opening closed, a second position in which it permits the normal rotation of the rotatable member by the bias force of the spring immediately after the motor is started, and a third position in which it transmits the drive of the motor to the rotatable member so as to reverse the rotation of the rotatable member after the normal rotation thereof, means for stopping normal rotation of the rotatable member, and motor control means for starting the motor in response to an extraneous operating signal for starting photography, for stopping the motor after …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.