Sound-slide projector control apparatus

Details Sound-slide projector control apparatus Sound-slide projector control apparatus

1976-03-16

1977-08-09

Yusko, Donald J.

Communications: electrical

Digital comparator systems

353 26A, 340162, H04Q 900, G03B 2302, G03B 2312

Patent

active

040414574

ABSTRACT:
A sound-slide projector of a basic form illustrated in U.S. Pat. No. 3,732,000 is equipped with a keyboard which controls a digital servomotor to position a slide tray for random access to the sound-slides. Operation of a mechanical slide-changing mechanism formerly cyclically operated in a predetermined time by a flywheel is temporarily interrupted by a solenoid while the servomotor positions the slide tray to provide variable timing required for random selection of sound slides.

REFERENCES:
patent: 2918656 (1959-12-01), Nolde et al.
patent: 3644892 (1972-02-01), Szymber et al.
patent: 3800285 (1974-03-01), Peschke et al.
patent: 3930992 (1976-01-01), Baumel et al.
patent: 3964025 (1976-06-01), Oosterhouse

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