Film advance device for surveillance cameras
US4760415A · kind A · utility
0Cited by
2References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 6, 1987 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Nov 6, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B19/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A sequence camera for recording a series of images on a strip of photographic film employing a rotating shutter and an intermittant film advance mechanism. A motor drives the shutter and the film advance mechanism. The film advance mechanism utilizes a beater wheel with two protruding pins spaced unequally about the circumference and a spoke wheel with a plurality of spokes. As the motor drives the beater wheel, the pins intermittently engage the spokes of the spoke wheel, which, in turn, intermittently advances the film. The film is exposed by the shutter during the stationary period between advancements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.