Thermal switch device

Details Thermal switch device Thermal switch device

1975-05-27

1976-04-20

Stolwein, Walter

Radiant energy

Photocells; circuits and apparatus

Housings

250206, 315159, 337107, H01J 502

Patent

active

039521923

ABSTRACT:
Thermal switch assembly for photoelectric control device to switch loads such as street lighting luminaires on and off in response to ambient light levels. Housing having a portion integral with base of photocontrol unit and having a removable cap contains a bimetal relay assembly and positive temperature co-efficient resistor (PTCR) connected to a photocell for actuating the electrical contacts of the relay assembly.

REFERENCES:
patent: 3496422 (1970-02-01), Horowitz
patent: 3538379 (1970-11-01), Berlin
patent: 3579167 (1971-05-01), Grable
patent: 3727063 (1973-04-01), Turner
patent: 3789220 (1974-01-01), Schacht

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