Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – With bimetallic elements
Patent
1982-10-18
1985-05-14
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
With bimetallic elements
337101, 337369, H01H 6106
Patent
active
045175420
ABSTRACT:
A temperature and voltage compensated time delay relay includes first and second bimetallic, contact carrying elements chosen to deflect in a similar manner in accordance with variations in ambient temperature for maintaining the contact gap therebetween substantially constant despite ambient temperature changes. A heater coil is wrapped about a first one of the elements (active element) for controlling the deflection thereof toward the second element (stationary element) for closing the contacts of the elements in a predetermined time period. An automotive flasher circuit having normally closed contacts and a flashing rate "on" time which varies inversely proportionally with an increase in supply voltage, is coupled electrically between the supply voltage and bimetallic element heating coil to control and keep relatively constant the rate of heat rise in the active bimetallic element and thus to maintain the time delay period of the relay relatively constant.
REFERENCES:
patent: 2792533 (1957-05-01), Richards
patent: 2889429 (1959-06-01), Mundt
patent: 3364322 (1968-01-01), Siiberg
patent: 3601736 (1971-08-01), Sepe
patent: 3855562 (1974-12-01), Rhee
Anderson Thomas G.
Broome Harold
Edison International Inc.
Gabala James A.
Gealow Jon Carl
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