Compact electric safety switch

Details Compact electric safety switch Compact electric safety switch

1986-10-09

1987-06-23

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200 67A, 200148H, H01H 3308, H01H 3342

Patent

active

046754814

ABSTRACT:
A compact electric safety switch including a rotatably mounted double contact assembly. Heavy duty compression springs are positioned under the blade assembly for rapid make and break connection between a pair of contact stabs. The series arrangement between the pair of contact stabs generates a corresponding pair of electrical arcs during the make and break occurrence which is less intense and of shorter duration than standard single contact arrangements. The pair of less intense arcs of short duration allow for a corresponding pair of arc chutes of smaller size than standard single arc chute arrangements. The contact stabs that receive the double contact blade are staggered to reduce electromagnetic attraction between the contact and the stabs.

REFERENCES:
patent: Re18385 (1932-03-01), Gaynor
patent: 1440467 (1923-01-01), Jennings
patent: 1911072 (1933-05-01), Dyer et al.
patent: 2188780 (1940-01-01), Sambleson et al.
patent: 4201439 (1980-05-01), M'Sadoques
patent: 4233482 (1980-11-01), DiMarco et al.
patent: 4596911 (1986-06-01), Guery et al.
U.S. patent application Ser. No. 811,716, filed Dec. 20, 1985, entitled "Molded Plastic Enclosure for Disconnect Switches" in the names of David Alan Hibbert et al.

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