Optics: motion pictures – With film treating or working
Patent
1977-01-03
1978-12-26
Adams, Russell E.
Optics: motion pictures
With film treating or working
352166, 352168, G03C 1100
Patent
active
041313445
ABSTRACT:
A programmable viewing system for processing and viewing cassette contained photographic film strips including a chassis defined by a centrally disposed vertical plate-like casting on which all internal viewer components cooperable mechanically and/or optically with the cassette are mounted together with a cassette well by which the cassette may be registered with such viewer components. A programming cam disc is rotatably carried by the casting for controlling both electrical switches for controlling an electronics logic system as well as shiftable viewer component positioning members, one on each side of the casting. The programming cam disc further controls cassette ejection. The program cam disc, together with contacts in the cassette, also control the film processing cycle during which the film is transported between spools and processing fluid is applied to the film strip. During the film processing cycle, the transporting of the film strip is controlled in response to the charge on a capacitor to stop, restart, and then slow down to make possible the proper application of the processing fluid to the film strip.
REFERENCES:
patent: 3851958 (1974-12-01), Land
patent: 3941465 (1976-03-01), Figge et al.
Adams Russell E.
Polaroid Corporation
Thornton David R.
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