Light beam switch housing structure

Details Light beam switch housing structure Light beam switch housing structure

1975-10-22

1977-05-03

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Housings

H01J 502

Patent

active

040216659

ABSTRACT:
Light beam switch unit containing source and/or receiver in a pressure-tight housing with sealed-in lenses, cover and cable inlet.

REFERENCES:
patent: 2562538 (1951-07-01), Dyer
patent: 3341710 (1967-09-01), Cade
patent: 3390388 (1968-06-01), Kahl et al.
patent: 3524068 (1970-08-01), Zorn
patent: 3857639 (1974-12-01), Mason
patent: 3870878 (1975-03-01), Walter et al.

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