Magazine camera
US3997251A · kind A · utility
4Cited by
5References
12Claims
0Family size
Inventor
Key dates
| Filing date | Aug 29, 1975 |
| Grant date | Dec 14, 1976 |
| Priority date | — |
| Expiry date | Aug 29, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B19/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The disclosed structure facilitates threading the film by eliminating both the intermittent movement and the film metering sprocket from the film chamber. Noise is reduced by driving the intermittent movement with a single cam, and faster faster pulldown is obtaind by combining the single cam movement with a re-entrant claw, which also facilitates positioning the movement in a separate sealed compartment. Drive mechanism for a film sprocket in the throat of the magazine includes improved positive clutch structure. Registration pins are driven by an improved linkage which facilitates film threading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.