Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1975-11-19
1978-03-28
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200153H, 335166, 335188, H01H 300
Patent
active
040816427
ABSTRACT:
An improved switch construction is provided having an overcenter-toggle mechanism for effecting the actuation of the one or more movable contacts of the switch. A pivotally-mounted operating lever carries one end of a toggle-tension spring, the other end of which is pivotally connected to the knee-joint pivot of a pair of pivotally-connected toggle links. The line of action of the force of the toggle-tension spring is such as to effect a straightening, or a collapsing of the pivotally-connected toggle-links, to thereby effect, respectively, a closure of the switch contacts, or an opening operation thereof.
Preferably, a releasable rotatable support, or trigger is provided for the pivotal connection of one of the toggle links, so that a remote tripping operation is possible by an unlatching of the releasable support, which normally provides a stationary pivot for the toggle linkage of the mechanism.
The construction is such that should welding occur at the contacts, the rotatable operating arm will indicate a correct position of the contacts, regardless of the effort manually made to provide a different indication of the handle.
REFERENCES:
patent: 1786796 (1930-12-01), Von Hoorn
patent: 1901692 (1933-03-01), Baxter
patent: 2043306 (1936-06-01), Sandin
patent: 2083304 (1937-06-01), Lindstrom
patent: 2083305 (1937-06-01), Lingal
patent: 2830154 (1958-04-01), Hermann et al.
patent: 3158716 (1964-11-01), Koval
patent: 3185791 (1965-05-01), Cain
patent: 3263051 (1966-07-01), Gauthier et al.
patent: 3562733 (1971-02-01), Murphy et al.
patent: 3605051 (1971-09-01), Casey
Rexroad James O.
Ricci Louis N.
Crout W. R.
Macon Robert S.
Westinghouse Electric Corporation
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