Electricity: circuit makers and breakers – Electric switch details – Contact
Patent
1983-03-17
1986-01-14
Marcus, Stephen
Electricity: circuit makers and breakers
Electric switch details
Contact
200281, 428673, H01H 102
Patent
active
045647313
ABSTRACT:
A switch for making and breaking a connection between a load circuit and a power line, with two parallelogrammatic linkages terminating in scissorlike contactor pairs, has limitedly swivelable and/or extensible cross-links interconnecting aligned pivotal junctions of the two linkages to provide them with a certain relative mobility. In an operating position, part-cylindrical armatures detachably secured to the two contactor pairs grip respective portions of an elongate countercontact fixedly suspended between a pair of rings attached to the power line, this countercontact comprising a metallic supporting tube also provided with part-cylindrical armatures in the region of the contactor pairs. Each armature may comprise several metallic layers on a base of copper, namely an inner layer of silver, a protective layer of tin on top thereof, and an outer silver layer. The armatures could also be made, at least in part, of a scorchproof material such as silver/cesium oxide.
REFERENCES:
patent: 768610 (1904-08-01), Lindall
patent: 2177288 (1939-10-01), Schellenger
patent: 2469878 (1949-05-01), Hannon et al.
patent: 2820932 (1958-01-01), Looney
patent: 2894101 (1959-07-01), Lindell et al.
patent: 3036168 (1962-05-01), Bagnagatti
patent: 3728510 (1973-04-01), Wallace et al.
patent: 3792520 (1974-02-01), Weiner
patent: 3807971 (1974-04-01), Boles et al.
Dubno Herbert
Kidorf Renee S.
Marcus Stephen
Ross Karl F.
Ruhrtal-Elektrizitatsgesellschaft Hartig GmbH & Co.
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