Motion picture system
US4273426A · kind A · utility
1Cited by
7References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1977 |
| Grant date | Jun 16, 1981 |
| Priority date | — |
| Expiry date | Jul 11, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In the disclosed motion picture system a shutter drive control circuit renders it possible to operate a rotary shutter in various exposure control modes including a mode in which rotation of the shutter is stopped for each long exposure of motion picture frame, the system can defer release of the shutter to the exposure aperture closed position pending completion of a picture frame exposure in any of the modes. The system terminates the preceding manual actuation of a shutter trigger when the taking of the particular picture frame is in progress.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.