Title:
Electric switch
United States Patent 2990460
Inventors:
Worth, Sidney V.
Rebling, Robert C.
Publication Date:
06/27/1961
Export Citation:
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Assignee:
ELECTRO CONTROLS INC
Primary Class:
200/33A
Other Classes:
200/34
International Classes:
B01J23/94; H01H29/10; B01J23/90; H01H29/00
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US Patent References:
2851547Time delay mercury switch
2615100Delayed electric mercury switch
1998254Electric circuit controller