Electricity: circuit makers and breakers – Special application – Liquid or moisture responsive
Patent
1980-03-31
1981-10-27
Shepperd, John W.
Electricity: circuit makers and breakers
Special application
Liquid or moisture responsive
H01H 508
Patent
active
042975514
ABSTRACT:
A transfer switch comprising a support, first and second fixed contacts mounted on the support and adapted to be connected to first and second sources of power, respectively, a rocker pivotable between first and second positions, a contactor carried by the rocker. The contactor is movable with respect to the first and second contacts and is engageable with the first fixed contact when the rocker is in its first position and with the second fixed contact when the rocker is in its second position. An actuator is provided for moving the rocker between its first and second positions, whereby the movable contactor is adapted to be connected to a first source of power when the rocker is in its first position and to a second source of power when the rocker is in its second position. The actuator comprises a shaft rotatably mounted on the support and an overcentering spring, the shaft having a handle and a crank and the spring being secured at one end to the crank and at the other end to the rocker. The rocker is pivotally mounted on the shaft and the shaft is rotatable on the support between first and second angular positions. The spring applies a force to the rocker causing the rocker to snap from one position to the other when the shaft is pivoted from one angular position to the other.
REFERENCES:
patent: 1738406 (1929-12-01), Townsend
patent: 1852899 (1932-04-01), Ramsay
patent: 4165453 (1979-08-01), Heinemann
Ronk Electrical Industries Brocure No. 6771 Meter-Rite Switches, received Jan. 24 1979.
Ronk Electrical Industries, Inc.
Shepperd John W.
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