Electricity: circuit makers and breakers – Electric switch details – Cases and bases
Patent
1980-10-06
1982-08-03
Little, Willis
Electricity: circuit makers and breakers
Electric switch details
Cases and bases
200302, 200 83B, 92104, H01H 904, H01H 3540
Patent
active
043428940
ABSTRACT:
An electrical switch construction having a housing carrying an electrical switch and an actuator for actuating an operating plunger of the electrical switch, the construction having a flexible diaphragm seal disposed against the electrical switch to seal the same to a part of the housing and define a chamber with that part of the housing so that the electrical switch is sealed therein. The diaphragm seal has a portion thereof disposed between the plunger and the actuator. The diaphragm seal has means for preventing a pressure increase in the chamber thereof that would adversely act across the portion of the diaphragm seal when there is an increase in the volume of fluid in the chamber regardless of whether the increase in volume is caused by a change in temperature and/or an out gasing of the plastic parts of the switch.
REFERENCES:
patent: 2202207 (1940-05-01), Johnson
patent: 2436958 (1948-03-01), Eisenberg
patent: 2814703 (1957-11-01), Martin
patent: 3028467 (1962-04-01), Hubbell
patent: 4054763 (1977-10-01), Wilcox
patent: 4296287 (1981-10-01), Boulanger et al.
Payne Frank
Scott Douglas R.
Little Willis
Robertshaw Controls Company
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