Electricity: circuit makers and breakers – Electric switch details – Contact
Reexamination Certificate
2007-06-26
2007-06-26
Deberadinis, Robert L. (Department: 2836)
Electricity: circuit makers and breakers
Electric switch details
Contact
C200S272000, C200S274000, C307S125000, C307S126000, C307S143000
Reexamination Certificate
active
10474961
ABSTRACT:
An electric device including an electric switch having a plurality of contact members arranged in series to form a plurality of breaking points arranged in series. One of the contact members at each breaking point is movable. A drive is arranged to actuate each movable contact member. The drive is arranged to effect simultaneous movement of the movable contact members. A commutation circuit is connected in parallel with the electric switch. Each contact member constitutes a part of a contact element, which contact elements are arranged in series. The contact elements have conducting and insulating parts. Every second contact element is movable in relation the others so that movement effects a breaking or closing position of the electric switch. The invention also includes a current limiter such as an electric device and also an electric power network provided with such a current limiter.
REFERENCES:
patent: 3430062 (1969-02-01), Roth
patent: 3448287 (1969-06-01), Giammona
patent: 4027123 (1977-05-01), Ihara
Liljestrand Lars
Valdemarsson Stefan
ABB AB
Deberadinis Robert L.
Franklin Eric J.
Kaplan Hal I.
Venable LLP
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