Optics: image projectors – Slide transfer mechanism – Slides fixed to movable carrier
Patent
1977-08-22
1979-08-21
Stephan, Steven L.
Optics: image projectors
Slide transfer mechanism
Slides fixed to movable carrier
40512, 198795, G03B 2308
Patent
active
041651626
ABSTRACT:
A slide magazine insertable in a side opening in a slide projector and comprising a plastic body with a continuous rail having two elongated sidewalls and two arcuate endwalls, and a cross-plate giving the body an H-shaped transverse cross-section. A grooved drive shaft is rotatably mounted within one arcuate endwall, and a plurality of plastic slide holders are slidably mounted on the rail, each having a dovetail-like notch in its inner side receiving the rail, two detent fingers extending toward each other on the inner side of the rail, and a slotted slide-holding frame on the outer side. The magazine body is divided into relatively movable end sections that are urged together by a spring for pressing the stack of holders toward the shaft, and the track is shaped to tilt the holders toward the shaft for positive pick-up of the detent fingers by the grooves in the shaft, to feed the holders around the rail, the grooves and the fingers having mating V-shaped cross-sections. Slideways span the gaps in the rail between the end sections to support the holders across the gaps, through the fingers, independently of the rail.
REFERENCES:
patent: 3170369 (1965-02-01), Frey et al.
patent: 3632200 (1972-01-01), Frey
patent: 3729254 (1973-04-01), Frey et al.
patent: 3799665 (1974-03-01), Frey
patent: 3820886 (1974-06-01), Frey et al.
patent: 3848726 (1974-11-01), Wiemer
patent: 3972140 (1976-08-01), Caspatto
patent: 4094599 (1978-06-01), Frey
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