Electricity: circuit makers and breakers – Multiple circuit control – Operating means
Patent
1991-12-30
1993-12-21
Scott, J. R.
Electricity: circuit makers and breakers
Multiple circuit control
Operating means
74820, 200 50C, H01H 344, H01H 900
Patent
active
052722910
ABSTRACT:
A dual switch actuator for coordinated actuation of two high-current switches, each having a switch operator with a shaft. The switch operator shafts are aligned paraxially with a main shaft of the actuator. A Geneva drive plate having an arcuate bearing surface and two drive pins is affixed to the main shaft. A modified Geneva follower plate is affixed to each of the switch operator shafts. Each follower plate has a drive slot for receiving a drive pin and a bearing surface complementary to the drive plate bearing surface. In a neutral position of the main shaft, each drive pin is positioned at a follower plate drive slot entrance and both follower plates bearing surfaces engage the main drive plate bearing surface. Rotation of the main shaft in either direction from neutral causes one guide pin to move inwardly of the follower plate drive slot, rotating the follower plate and its associated switch operator shaft to actuate one switch without actuation of the other. A detent prevents rotation of the main shaft in either direction from neutral to engage one of the follower plates and rotate it and its associated switch operator shaft to move its switch contacts to a closed position when the other of the follower plates is in a position of rotation slightly short of its fully open position, a position which could occur if the switch contacts associated with the switch of the other follower plate were welded in a partially closed, actuated condition.
REFERENCES:
patent: 2253183 (1941-08-01), Le Count
patent: 3213247 (1965-10-01), Stene
patent: 3441699 (1969-04-01), Erickson
patent: 4103133 (1978-07-01), Erickson et al.
patent: 4110584 (1978-08-01), Erickson et al.
patent: 4137433 (1979-01-01), Erickson et al.
Boltswitch Inc.
Scott J. R.
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