Permanent magnet bistable solenoid actuator

Details Permanent magnet bistable solenoid actuator Permanent magnet bistable solenoid actuator

1984-12-24

1985-08-06

Duggan, Donovan F.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

310 14, 310 30, 335229, H01F 700

Patent

active

045338906

ABSTRACT:
A bistable actuator comprising a permanent magnet assembly secured to an armature shaft and a pair of core elements axially disposed on either side of the permanent magnet assembly. The cores have axially opposed inner and outer annular extensions defined in each core by a central axial opening which supports the armature shaft and an annular recess in which is received an electrical coil. The permanent magnet assembly comprises inner and outer annular axially magnetized permanent magnets radially spaced by a ferromagnetic ring so as to be aligned with the inner and outer core extensions.

REFERENCES:
patent: 3040217 (1962-06-01), Conrad
patent: 3202886 (1965-08-01), Kramer
patent: 3420492 (1969-01-01), Ray
patent: 3460081 (1969-08-01), Tillman
patent: 3514674 (1970-05-01), Ito et al.
patent: 3634735 (1972-01-01), Komatsu et al.
patent: 3728654 (1973-04-01), Tada
patent: 3743898 (1973-07-01), Sturman
patent: 3889219 (1975-06-01), Larner
patent: 4097833 (1978-06-01), Myers
patent: 4122423 (1978-10-01), de Bennetot
patent: 4240056 (1980-12-01), Mayer
patent: 4253493 (1981-03-01), English

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