Electricity: circuit makers and breakers – Liquid contact – Tiltable or rotatable
Patent
1987-04-17
1989-01-10
Luebke, Renee S.
Electricity: circuit makers and breakers
Liquid contact
Tiltable or rotatable
200222, 200227, 200231, H01H 2904
Patent
active
047975199
ABSTRACT:
A mercury tilt switch having a hollow metal housing with opposite open ends. An insulating glass member is disposed at, makes a glass-to-metal compression seal with, and closes, one of the open housing ends. A metal end cap is disposed at, resistance welded to, and sealably closes, the other of the open housing ends. The housing has an outer wall portion defining a single chamber therewithin which extends between the insulating glass member at the one housing end and the metal end cap at the other housing end. At least one electrical electrode is sealably mounted through the insulating glass member and projects from opposite sides thereof to the outside of and into the housing chamber. A quantity of mercury is disposed in the single housing chamber and is flowable between and contactable with the electrode at the one housing end and the metal end cap at the other housing end upon tilting and countertilting of the housing. Further, the housing can include a baffle disposed within the single chamber of the housing generally intermediate of the opposite ends thereof and having a passageway defined therethrough which provides a flow path for the quantity of mercury between the electrode and the end cap so as to increase the required degree of tilting and countertilting of the housing to cause flow of the quantity of mercury therebetween. Preferably, when the baffle is provided, it is a portion of the housing formed integrally with the outer wall portion thereof. A ceramic insert is provided to help prevent arc erosion. A method of manufacturing the switch is provided.
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Luebke Renee S.
Pappas George
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