Interlock mechanism for preventing deployment of film loading chamber of a camera
US5563672A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1994 |
| Grant date | Oct 8, 1996 |
| Priority date | — |
| Expiry date | Nov 4, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/268
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An improved film cartridge handling mechanism for effecting end-wise loading of a film cartridge into a deployable loading chamber of a camera for automatic film advance into a film transport path on closure of the loading chamber, for locking the loading chamber in the closed position when the filmstrip is advanced from the film cartridge, and for preventing the loading chamber from being deployed when the filmstrip is in the filmstrip transport path. A film cartridge is aligned with the filmstrip transport path, and the cartridge film door is opened on movement of the film loading chamber into the closed position. The filmstrip is advanced through the filmstrip transport path past the exposure gate and into a takeup chamber as exposures are made and rewound after all exposures are made. A filmstrip edge sensor is deflected by the presence of the filmstrip in the filmstrip transport path indicating that the film door is open and interferes with the opening mechanism for deploying the film loading cartridge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.