Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1976-12-01
1978-02-07
Broome, Harold
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335174, 335234, H01F 312, H01F 708
Patent
active
040729184
ABSTRACT:
An actuator having an armature plate urged to a stable position by a spring and which may be held in another stable position by a permanent magnet. Application of an appropriate current pulse to a coil within the actuator reduces the flux flow through and the magnetic force on the armature sufficiently to release the armature to the former stable position under the influence of the spring. Two magnetic circuits, one of which includes a non-working air gap, are employed, the non-working air gap serving to maintain a flux path, of a predetermined maximum reluctance, for the permanent magnet when the armature plate is in the former stable position.
REFERENCES:
patent: 3693122 (1972-09-01), Willard
patent: 3755766 (1973-08-01), Read, Jr.
patent: 3944957 (1976-03-01), Kotos et al.
Broome Harold
Regdon Corporation
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