MICROFILM CAMERA

A microfilm camera having a high speed frame advance system comprising a pair of idler arms adapted to control the supply and take-up of microfilm so as to maintain substantially constant tension thereon. An aperture at which the microfilm is photographically exposed and a frame advance drive roller...

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1. Verfasser:	DAVID K. STUDLEY
Format:	Patent
Sprache:	eng
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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creator	DAVID K. STUDLEY
description	A microfilm camera having a high speed frame advance system comprising a pair of idler arms adapted to control the supply and take-up of microfilm so as to maintain substantially constant tension thereon. An aperture at which the microfilm is photographically exposed and a frame advance drive roller are disposed between the idler arms. The frame advance drive roller is rotatably driven, on demand, by a servomotor which is energized by a digital control circuit. The digital control circuit receives feedback information from a shaft encoder connected to the servomotor and functions to accelerate and decelerate the servomotor in response thereto.
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An aperture at which the microfilm is photographically exposed and a frame advance drive roller are disposed between the idler arms. The frame advance drive roller is rotatably driven, on demand, by a servomotor which is energized by a digital control circuit. 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STUDLEY</creatorcontrib><title>MICROFILM CAMERA</title><description>A microfilm camera having a high speed frame advance system comprising a pair of idler arms adapted to control the supply and take-up of microfilm so as to maintain substantially constant tension thereon. An aperture at which the microfilm is photographically exposed and a frame advance drive roller are disposed between the idler arms. The frame advance drive roller is rotatably driven, on demand, by a servomotor which is energized by a digital control circuit. 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STUDLEY</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>MICROFILM CAMERA</title><date>1972-07-18</date><risdate>1972</risdate><abstract>A microfilm camera having a high speed frame advance system comprising a pair of idler arms adapted to control the supply and take-up of microfilm so as to maintain substantially constant tension thereon. An aperture at which the microfilm is photographically exposed and a frame advance drive roller are disposed between the idler arms. The frame advance drive roller is rotatably driven, on demand, by a servomotor which is energized by a digital control circuit. The digital control circuit receives feedback information from a shaft encoder connected to the servomotor and functions to accelerate and decelerate the servomotor in response thereto.</abstract><oa>free_for_read</oa></addata></record>
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subjects	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
title	MICROFILM CAMERA
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