Photoelectric guard

Details Photoelectric guard Photoelectric guard

1974-09-17

1976-03-16

Stolwein, Walter

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

210209, 340258B, G01D 2104

Patent

active

039448185

ABSTRACT:
This invention relates to a protective guard for surrounding hazardous parts of a machine. The guard comprises a photoelectric barrier, connected to a circuit which will shut down the machine both when the photoelectric beam is broken, and also when a part of the photoelectric system fails to operate correctly.

REFERENCES:
patent: 2912683 (1959-04-01), Bagno
patent: 3742222 (1973-06-01), Endl
patent: 3787700 (1974-01-01), Chasson
patent: 3810148 (1974-05-01), Karsten et al.
patent: 3859647 (1975-01-01), Ross

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