Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1974-07-18
1977-01-11
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200278, 200258, 200260, H01H 3312
Patent
active
040028704
ABSTRACT:
An arcing contact for a high current capacity switch having a pair of switch members in sliding face-to-face engagement is formed from a set of resilient laminations that shunt the switch members as the switch makes on closing or breaks on opening. One end of the set of laminations is mounted on a face of one of the switch members, usually a blade, and the other end of the set of laminations is angled so that the end surfaces or tips bear against a face of the other switch member, usually a termination, when the arcing contact shunts the switch members. While in this position, a deflection of the laminations develops a spring force that urges the tips of the laminations into contact with the termination. The tips are inwardly bevelled with respect to the face of the termination and lie in a common plane so that during electrical connection they are in a substantially parallel relationship with the face of the termination, at substantially the same pressure. In a preferred form, the arcing contact has two or more sets of laminations that overlie one another in a spaced apart relationship. The free end of each of the sets is divided into a plurality of longitudinally extending fingers to facilitate each tip of each finger in establishing a good electrical connection with the termination. The tips preferably make electrical contact with the termination through a replaceable arcing contact strip mounted on the termination.
REFERENCES:
patent: 570419 (1896-10-01), Wurts
patent: 850475 (1907-04-01), Hertner
patent: 1395348 (1921-11-01), MacNeill
patent: 2465940 (1949-03-01), Smith, Jr.
patent: 2779844 (1957-01-01), Kowalski
patent: 3271534 (1966-09-01), McFadden
patent: 3308248 (1967-03-01), Stephan et al.
patent: 3381105 (1968-04-01), Mortenson
patent: 3523165 (1970-08-01), Datchenko et al.
Arrow-Hart, Inc.
Macon Robert S.
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