Polarized electromagnet having three states and a control circui

Details Polarized electromagnet having three states and a control circui Polarized electromagnet having three states and a control circui

1985-07-18

1986-09-02

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335 81, 335234, 361208, H01F 708

Patent

active

046098992

ABSTRACT:
A three-state polarized electromagnet comprises a stationary system (1) surrounded by a coil (5) and a moving system (7). Each system consists of a permanent magnet (2; 14) fitted with pole pieces (3, 4; 12, 13). The ends of the pole pieces are bent-back towards each other in order to define four air-gaps (E1 to E4) for permitting displacement of the moving system (7) between two end positions. One end portion of a pole piece forms part of only one air-gap and the air-gap faces are joined to pole faces of permanent magnets having the same polarity in order to reduce to zero the fluxes within the air-gaps which are closed when no excitation is applied and in order to permit a return to a stable central position.

REFERENCES:
patent: 2872546 (1959-02-01), Babcock
patent: 4142166 (1979-02-01), Arnoux
"La Telegraphe et le Telex", Organes Constituties et Voies de Transmission, D. Faugeras, Ed. Eyrolles 1962, p. 194.

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