Electromagnetically actuated rotary actuator controlled by a pow

Details Electromagnetically actuated rotary actuator controlled by a pow Electromagnetically actuated rotary actuator controlled by a pow

1985-10-10

1987-08-25

Scott, J. R.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335125, H01F 708, H01H 6702

Patent

active

046895892

ABSTRACT:
A rotary actuator has a casing; a rotor rotatably provided in the casing; an exciting coil mounted on the rotor; a magnetic pole member provided in the casing which surrounds the rotor; first, second and third contact elements mounted on the rotor and electrically coupled to opposite end terminals and an intermediate terminal of the coil respectively; first and second stops provided in the casing and cooperating with the rotor to restrict the rotation thereof over a predetermined angular range; fourth, fifth and sixth contact elements mounted on the casing to cooperate respectively with the first, second and third contact elements such that the sixth contact element permanently contacts the third contact element, that the fourth contact element contacts the first contact element except when the rotor engages and is adjacent to the first stop and that the fifth contact element contacts the second contact element except when the rotor engages and is adjacent to the second stop; and a switch for applying electric power to the sixth contact element and selectively to the fourth and fifth contact elements. An indicating device is connected to the switch to indicate whether the rotor is at a first position engaging the first stop or at a second position engaging the second stop.

REFERENCES:
patent: 3233066 (1966-02-01), Stoddard et al.
patent: 3372254 (1968-03-01), Burch et al.

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