Photoelectric switch

Details Photoelectric switch Photoelectric switch

1978-03-27

1980-06-10

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Housings

H01J 502

Patent

active

042074649

ABSTRACT:
A photoelectric switch comprising a circuit block which is housed within a fluid-tight enclosure.
The enclosure comprises a box-like housing having a first opening at one end, a second opening at another end and a cap means closing the first opening and fixed to the housing. The circuit block comprising a circuit board and a plurality of circuit elements, is placed in the enclosure through the first opening. A light-source element and a light-responsive element are positioned in the cap means and electrically connected to the circuit board.
A conductor is electrically connected to the circuit board and extends out of the enclosure through the second opening.

REFERENCES:
patent: 3758782 (1973-09-01), Radford et al.
patent: 3842257 (1974-10-01), Kohler
patent: 4021665 (1977-05-01), Haas et al.
patent: 4051365 (1977-09-01), Fukuyama et al.

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