Electricity: circuit makers and breakers – Multiple circuit control – Operating means
Patent
1977-09-21
1979-05-15
Scott, James R.
Electricity: circuit makers and breakers
Multiple circuit control
Operating means
200 6B, 200153K, 200336, H01H 300
Patent
active
041549910
ABSTRACT:
A rotary switch for high current applications that rapidly actuates a first set of contacts in one direction of rotation of the switch and actuates the first set and a second set of contacts upon rotation of the switch in the other direction. Each set of contacts has a follower roller that is moved by a rotary cam biased axially by a detent assembly that prevents rotation of the cam below a predetermined rotational force. A torsion spring assembly is provided for overcoming the detent assembly force and rapidly rotating the cam by the energy stored in the torsional spring. The torsional spring assembly has a radial projection that is engaged by a rotary operating member that also engages the ends of the torsional spring to wind the spring and store energy up to the point where the operator member engages the radial projection to rotate the entire torsional spring assembly including the contact actuating cam permitting the energy stored within the torsional spring assembly to be released to rapidly rotate the actuating cam which controls the contact members.
REFERENCES:
patent: 1266811 (1918-05-01), Johnson
patent: 2762876 (1956-09-01), Glogau et al.
patent: 3163724 (1964-12-01), Roeser
patent: 3251956 (1966-05-01), Rasor et al.
patent: 3271531 (1966-09-01), Winogrocki et al.
patent: 3310642 (1967-03-01), Zeller
patent: 3596013 (1971-07-01), Pihl
patent: 4025738 (1977-05-01), Erwin et al.
Hickman Ronald J.
Mayer William R.
Scott James R.
Stewart-Warner Corporation
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