Camera with manual film rewind locked when cassette closed, preferably to position film exposed indicator in window of cassette
US5614976A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1996 |
| Grant date | Mar 25, 1997 |
| Priority date | — |
| Expiry date | Jan 24, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/263
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A camera for use with a film cassette having a spool rotatable to wind an exposed filmstrip including a trailing film end portion into the cassette and a light lock movable to be closed after the trailing film end portion is wound into the cassette, comprises a manual film winder rotatable in engagement with the spool in a film winding direction to rotate the spool in the same direction to wind the exposed filmstrip including the trailing film end portion into the cassette and locking means coupled with the light lock to prevent further rotation of the film winder in the film winding direction when the light lock is closed. Preferably, the cassette has an indicator flag rotatable coaxially with the spool to be positioned in an indicator window of the cassette to provide a visual film-exposed warning when the spool is at a predetermined angle of rotation, and the locking means secures the film winder at the same angle of rotation to position the indicator flag in the indicator window of the cassette when the light lock is closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.