Adaptor for a film viewer
US4205803A · kind A · utility
4Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 21, 1978 |
| Grant date | Jun 3, 1980 |
| Priority date | — |
| Expiry date | Feb 21, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S353/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A moving film projector, viewer or an adaptor device therefor comprising a rotatable spindle to receive a let-off spool or reel of film, a rotatable take-up spool or reel and a guide to direct the film in its desired path from the let-off spool, when this is in position on the spindle therefor, past a viewing station at which the film can be viewed or projected, and over the edge of and down towards the center plane of, the take-up spool, the take-up spool having a substantially continuous peripheral side wall towards which the film strip is guided and against which the film is coiled during use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.