Slide projector apparatus
US4199234A · kind A · utility
Inventor
Key dates
| Filing date | Mar 13, 1979 |
| Grant date | Apr 22, 1980 |
| Priority date | — |
| Expiry date | Mar 13, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B23/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A slide projector is juxtaposed with a slide magazine in a housing. One of the projector and magazine is movably mounted so that each slide may be aligned with where it may be loaded into the projector and unloaded back into the magazine. At the loading station a pair of pivotable, opposed toggles operated by an eccentric device frictionally rollingly grip and release two opposite edges of the slide with reversibly driven rollers. In a disclosed elaboration, a plurality of slide magazines are disposed on a spider, which may be rotated to bring any selected magazine into juxtaposition with the projector. In the elaborated version shown, the slide projector is laterally movably mounted for temporary retraction during indexing of the spider.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.