Distance measuring gauge
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United States of America Patent
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-
Aug 5, 1980
Issued Date -
N/A
app pub date -
Dec 16, 1977
filing date -
Dec 16, 1977
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A hand held digital read-out measuring instrument in which interference fringes are generated by the transmission of radiations through gratings which move relative to one another according to a distance being measured and the fringes are counted to detect changes in the fringe pattern and generate a pulse output related to the distance, means being provided to control the rate of movement and to exert a substantially constant force on the movable elements.
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