Radiant energy – Photocells; circuits and apparatus – Housings
Patent
1979-08-02
1981-06-23
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Housings
H01J 502
Patent
active
042752973
ABSTRACT:
In an electro-optical strand motion detecting device the improvement comprises an optically transparent tubular shield surrounding the path of said strand at said sensor.
REFERENCES:
patent: 4166948 (1979-09-01), Steffen
Canfield Sheldon A.
Pierce Richard H.
Rapp Kenneth L.
Cloutier Philip R.
Dziegielewski Greg
Hostetter Darwin R.
Hudgens Ronald C.
Nelms David C.
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