Electro-optical strand detector

Details Electro-optical strand detector Electro-optical strand detector

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

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