Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1981-10-14
1983-05-10
Broome, Harold
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335230, 335234, 335255, H01F 708
Patent
active
043832342
ABSTRACT:
The permanent magnet is mounted within the coil in engagement with the magnetic frame so when the coil is energized by a pulse of DC voltage of polarity giving a coil flux aiding the magnet the plunger is actuated against the bias of the spring to move the plunger close enough to the magnet to be retained. A pluse of opposite polarity gives a coil flux opposing the magnet flux so the holding force is less than the spring force and the plunger is moved to its inactive position.
REFERENCES:
patent: 3683239 (1972-08-01), Sturman
patent: 4178573 (1979-12-01), Swanson
Godkin Mikhail
Yatsushiro Kenji
Bell Edward L.
Broome Harold
Davis David L.
Smith Robert E.
The Singer Company
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