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Film advance indicatorA film advancement indicator which includes an optical sensor that detects the rotational movement of a disc that rotates only when the film advance is described. When the film does not advance, an indicator light is activated. A counter is included in the electronic circuit to determine the number of film frames advanced.
Document ID
19820018752
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Freeman, E. T. (NASA Langley Research Center Hampton, VA, United States)
Stump, C. W. (NASA Langley Research Center Hampton, VA, United States)
Dreisbach, F. W. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 4, 2013
Publication Date
January 19, 1982
Subject Category
Instrumentation And Photography
Report/Patent Number
Patent Number: US-PATENT-4,311,378
Patent Number: NASA-CASE-LAR-12474-1
Patent Application Number: US-PATENT-APPL-SN-171934
Accession Number
82N26628
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-4,311,378|NASA-CASE-LAR-12474-1
Patent Application
US-PATENT-APPL-SN-171934

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