Electricity: electrothermally or thermally actuated switches – Thermally actuated switches – Expansible or vaporizable fluid actuated
Patent
1975-03-21
1977-07-26
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Thermally actuated switches
Expansible or vaporizable fluid actuated
337320, H01H 3734, H01H 3740
Patent
active
040386139
ABSTRACT:
An expansible box or bellows or diaphram box comprises two corrugated metal sheets secured together in a sealed manner about their rims. The box is arranged between a transmission lever and an adjusting member. A connection piece has a flange portion which lies against the inside of one metal sheet and a tubular portion which passes through an opening in the metal sheet and through an opening in the transmission lever. The connection piece thereby serves to locate the expansible box on the transmission lever. A capillary tube is soldered inside the tubular portion and leads to a temperature sensor. The transmission lever acts on a snap switch.
REFERENCES:
patent: 1661346 (1928-03-01), Sawyer
patent: 2187258 (1940-01-01), Wood
patent: 2607228 (1952-08-01), Coxon
patent: 2698633 (1955-01-01), Harland
patent: 2717291 (1955-09-01), Fry
patent: 3121151 (1964-02-01), Mitick
patent: 3809835 (1974-05-01), Watt
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