Electromagnetic actuator having preloaded spring means

Details Electromagnetic actuator having preloaded spring means Electromagnetic actuator having preloaded spring means

1979-09-17

1981-09-15

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335258, 335262, H01F 708

Patent

active

042900409

ABSTRACT:
An actuator comprising a coil, an armature moveable along a path toward and away from the coil, and a spring for resiliently urging the armature in one direction along the path. The coil is energizable to urge the armature in the other direction along the path against the biasing action of the spring. The spring rate of the spring progressively increases as the armature is moved by electromagnetic forces. This is accomplished by using an appropriately configured leaf spring and a a ramp for progressively supporting the leaf spring as it is deflected. The leaf spring is also preloaded.

REFERENCES:
patent: 3787791 (1974-01-01), Borger et al.
patent: 4152098 (1979-05-01), Moody et al.
patent: 4157873 (1979-06-01), Ito

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