Electricity: circuit makers and breakers – Special application – Actuated concurrently with operation or use of art device
Patent
1990-10-26
1992-10-06
Williams, Howard L.
Electricity: circuit makers and breakers
Special application
Actuated concurrently with operation or use of art device
200 6181, 200 6182, 200306, H01H 2104, H01H 902
Patent
active
051533952
ABSTRACT:
A switch operated to an open circuit condition by a closed lid of an automatic clothes washing machine. The switch housing is comprised of two parts which mate with each other and with the specially configured switch operating shaft for inhibiting entry of liquids into the switch contact chamber of the housing by splashing or by capillarity. A vent tube leads from the housing and, in effect, accepts air resulting from the air in the housing expanding when the switch is warm and which allows back flow of that air into the housing when the air in the housing cools. The tube prohibits pressure developing in the housing which is negative with respect to ambient atmospheric pressure.
REFERENCES:
patent: 4963706 (1990-10-01), Mohtasham
patent: 4968862 (1990-11-01), Maeda
Falcon Dave
Lehn Mike
Lovas Steve
Schantz Spencer C.
Le D.
U.S. Controls Corp.
Williams Howard L.
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