One-time-use camera with anti-backup pawl engaging film winder responsive to film loading
US6049675A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1999 |
| Grant date | Apr 11, 2000 |
| Priority date | — |
| Expiry date | Jan 21, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2219/045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A subassembly for a one-time-use camera includes a main body part that has a film take-up chamber adapted to receive a film spool and a film supply chamber for an unexposed film roll, a film winding thumbwheel supported for winding rotation in engagement with the film spool to similarly rotate the film spool to take up an exposed filmstrip, and an anti-backup pawl engageable with the thumbwheel to prevent unwinding rotation of the thumbwheel and disengageable from the thumbwheel to allow unwinding rotation of the thumbwheel to permit the film spool to be similarly rotated to unwind a fresh exposed filmstrip from the film spool to form the unexposed film roll. The film take-up chamber is configured to allow the film spool to be received in the film take-up chamber in a film unwinding position for unwinding rotation of the film spool and a different film winding position for winding rotation of the film spool. The anti-backup pawl has an actuator which when actuated disengages the anti-backup pawl from the thumbwheel and which is located in the film take-up chamber to allow the film spool when received in the film take-up chamber in the film unwinding position to actuate the actuator…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.