Microfilm reading device stage - has middle rest position from which it is moved to position film

A microfilm reading device has an illumination unit for the microfilm. There is a film stage which is movable with respect to the device case and carrying a delivery and a take-up reel for the roll film, and a lens for the observed micro-image projection on a screen. A motor is provided for driving...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HOFMANN,WILFRIED, RAUFFER,WALTER
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY PHOTOGRAPHY PHYSICS
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Beschreibung
Zusammenfassung:	A microfilm reading device has an illumination unit for the microfilm. There is a film stage which is movable with respect to the device case and carrying a delivery and a take-up reel for the roll film, and a lens for the observed micro-image projection on a screen. A motor is provided for driving the roll film (7) forward and backward. A control for the forward and backward drive moves the film stage (2) from a middle rest position in one or the other direction (C, D).