Blankette projector

Details Blankette projector Blankette projector

1975-05-05

1976-11-16

Stephan, Steven L.

Optics: image projectors

Selective data retrieval

Film strip

352123, G03B 2312, G03B 2104

Patent

active

039920887

ABSTRACT:
A projector containing a group of eigth film cassettes which are selectively slidable into a position between a lens and an electric light so to project an image upon a screen upon a front side of a case that contains the entire device, the film cassettes containing micro file upon which sheet music is photographed so that the cassettes contain a large library of sheet music, and the case being adaptable for placement upon a piano or in front of a musician playing any other instrument.

REFERENCES:
patent: 2037705 (1936-04-01), Chapman
patent: 2755030 (1956-07-01), D'Ornellas
patent: 3586431 (1971-06-01), Fraser
patent: 3724775 (1973-04-01), Nupnau

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