Contact structure for a power circuit breaker
United States Patent 3402274
Inventors:
Fred, Bould
Publication Date:
09/17/1968
Assignee:
SQUARE D CO

US Patent References:
3345486Blast-valve operation for gas-blast circuit breakers having two currentresponsive means
3218428Adjustable contact pressure switch mechanism
2302394Electric switch
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Primary Class:
218/21
International Classes:
H01H1/22; H01H9/38; H01H1/58; H01H71/24; H01H1/12; H01H9/30; H01H1/00; H01H71/12




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