Electricity: electrothermally or thermally actuated switches – Thermally actuated switches – Expansible or vaporizable fluid actuated
Patent
1977-11-14
1979-07-03
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Thermally actuated switches
Expansible or vaporizable fluid actuated
337117, 337119, 337319, H01H 3738, H01H 3740, H01H 3742
Patent
active
041602250
ABSTRACT:
A temperature responsive control device is provided for controlling an electric oven. The device is comprised of a housing which contains an electrical switching means which is controlled by a temperature sensitive expansible member through a snap-acting spring mechanism. The expansible member consists of a hydraulic diaphragm, a fluid filled capillary tube and a temperature-sensing bulb. The hydraulic diaphragm is composed of two generally circularly shaped plates which are welded together at their edges. The top of the diaphragm contains a circular stud the top of which is conically shaped and is received into a conical bearing recessed into the shaft of a rotatable temperature setting means. One corner of the diaphragm is formed to fit into a notch in the interior of the housing. One end of the capillary tube is inserted directly into a small inwardly extending channel in the edge of the diaphragm and the other end contains the temperature-sensing bulb.
REFERENCES:
patent: 3113438 (1963-12-01), Hubacker et al.
patent: 3293394 (1966-12-01), Staples
patent: 4112765 (1978-09-01), Hollweck
Broome Harold
General Electric Company
Lacomis Bernard J.
Reams Redford M.
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