Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1992-05-28
1993-08-31
Picard, Leo P.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335260, 335264, 335238, 74625, H01F 300, H01F 708
Patent
active
052412920
ABSTRACT:
A three position electrically operated actuator has a self centering system so that if power is off for the actuator, it returns to a central position. The actuator comprises a center cavity with a first solenoid on one side and a second solenoid on the other side, a shaft extends through the center cavity and is joined to a first magnetic core of the first solenoid and a second magnetic core for the second solenoid. The shaft has a connection at least at one end for connection to a gearbox or the like. When the first solenoid is energized the shaft moves axially in one position so the connection is at a first position, when the second solenoid is energized, the shaft moves axially in the opposite direction so the connection is at a second position. A coil spring is provided in the cavity, and when neither solenoid is energized the spring moves the shaft so the connection is in a third position midway between the first position and the second position.
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Bjorknas John I.
Druet Peter J.
Barrera Raymond
Picard Leo P.
Prime Mover, Inc.
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