Diaprojector

Details Diaprojector Diaprojector

1981-04-24

1983-05-10

Marcus, Stephen

Optics: image projectors

Slide transfer mechanism

For slides of various dimensions

353116, G03B 2304

Patent

active

043826636

ABSTRACT:
A diaprojector for framed diapositives accommodated in at least two different magazines has two tracks each for a respective one of the magazines having smaller and greater diapositive compartment widths, a drive for gradually transporting each of the magazines by a distance corresponding to the width of the diapositive compartments, a sliding element having a width suitable for exchanging the diapositives in one of the magazines, and a rider having a width suitable for exchanging of the diapositives in the other magazine and displaceable on the sliding element between two positions in which either the sliding element or the rider is available for acting upon the respective magazine, and a sensing device operative for blocking the operation of the projector, when the position of the rider does not correspond to the magazine in which the diapositives must be exchanged.

REFERENCES:
patent: 2969711 (1961-01-01), Robinson et al.
patent: 3118341 (1964-01-01), Weiss et al.
patent: 3178998 (1965-04-01), King
patent: 3501234 (1970-03-01), Johannsen et al.
patent: 3644031 (1972-02-01), Bennett
patent: 3953119 (1976-04-01), Erchoff

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