Electricity: circuit makers and breakers – Electric switch details – Contact
Patent
1987-09-01
1989-01-03
Luebke, Renee S.
Electricity: circuit makers and breakers
Electric switch details
Contact
200 48KB, 200260, 200290, H01H 150, H01H 900
Patent
active
047958693
ABSTRACT:
A contact assembly is provided for a high-voltage switch. The contact assembly includes one or more contact members that cooperate with a contact element. The arrangement of the contact members is such that an interference fit results with the contact element and one or more of the contact members are displaced. To provide operation of the contact assembly in ice-forming environments, facilities are provided to prevent the ingress of moisture and the formation of ice in the space required for displacement of the appropriate one or more contact members. Of course, if ice were allowed to occupy the space required for displacement of the one or more contact members, due to the relatively incompressible nature of ice, appropriate contact engagement would be inhibited since displacement of the one or more contact members would be unable to occur when engaged by the contact element. In a specific arrangement, the contact assembly includes a contact support structure which carries the contact members. A filler element is provided between the contact support structure and the contact members that are required to be displaceable. The filler element is deformable and/or compressible in response to the displacement of the contact member. Additionally, the filler element is impervious to the ingress of moisture or the formation of ice crystals and retains its flexiblity under ice-forming conditions.
REFERENCES:
patent: 2274816 (1942-03-01), Winther, Jr.
patent: 3758733 (1973-09-01), Durocher et al.
patent: 4101747 (1978-07-01), Houk
patent: 4296284 (1981-10-01), Lott
Czuma Dean M.
Roman Christopher D.
Lapacek James V.
Luebke Renee S.
S&C Electric Company
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