Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1995-05-15
1997-05-13
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
337 4, 337 6, 337142, 337163, 337403, 337405, 337415, 337416, 338 49, 338 92, 338 93, 338 94, 338 95, 361 24, 361 58, H01H 7110
Patent
active
056295693
ABSTRACT:
A self-configuring photoelectric control circuit for controlling operation of a load based on ambient light. The photocontrol circuit comprises a photocell responsive to ambient light, a heating resistor connected to the photocell, a bimetallic element in proximity to the heating resistor and movable in response to generation of heat from the heating resistor. A switch is operated by the bimetallic element and is connected between an input connected to a power source and an output connected to the load. A series resistor is connected to the heating resistor and a shunt is connected across the series resistor to provide a current bypass around the series resistor for operation with a low voltage power source, for instance 120 volts. The shunt is maintained in a flexed condition to form the bypass and a connection of the shunt across the series resistor is formed of a meltable material. When a high voltage source is connected to the input for a duration of time, the heating resistor generates sufficient heat to cause melting of the meltable material thereby permitting relaxation of the resilient shunt opening the bypass.
REFERENCES:
patent: 2667551 (1954-01-01), Berthel
patent: 3327197 (1967-06-01), Marquis
patent: 3421026 (1969-01-01), Andrich
patent: 3737761 (1973-06-01), Walther
patent: 3886408 (1975-05-01), Klayum et al.
patent: 3916183 (1975-10-01), Duve et al.
patent: 3983407 (1976-09-01), Shott
patent: 4042853 (1977-08-01), Duve
patent: 4268813 (1981-05-01), Burch
patent: 4276531 (1981-06-01), Davis
patent: 4540892 (1985-09-01), Carvalho
patent: 4587417 (1986-05-01), Duve et al.
patent: 4991054 (1991-02-01), Walters
patent: 4999615 (1991-03-01), Toupin et al.
patent: 5084691 (1992-01-01), Lester et al.
patent: 5107440 (1992-04-01), Callahan et al.
patent: 5132596 (1992-07-01), Walters et al.
patent: 5196820 (1993-03-01), Ubukata
patent: 5241444 (1993-08-01), Yeh
patent: 5255148 (1993-10-01), Yeh
patent: 5305175 (1994-04-01), Yeh
patent: 5325023 (1994-06-01), Martich
Intermatic Inc.
Paladini Albert W.
Shoop Jr. William M.
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