Bistable toggling indicator

Details Bistable toggling indicator Bistable toggling indicator

1988-01-20

1989-09-05

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335272, H01F 708

Patent

active

048642649

ABSTRACT:
In the disclosed device, a pair of magnets supported in the ends of a C-shaped yoke bias an armature into one of the two rotary positions. A short pulse to a coil about the center of the yoke induces a short term magnetic field that supplements the polarity at one end of the yoke so as to either maintain the armature in its biased position or swing the armature to its other biased position. A subsequent pulse, producing a field in the opposite direction, returns the armature to its first position. In each case, the magnets retain the armature in its biased position even after the pulse stops. The armature pivots between portions of the yoke magnetized by the same magnet.

REFERENCES:
patent: 3027499 (1962-03-01), Holdway
patent: 3631366 (1971-12-01), Ugon
patent: 3634793 (1972-01-01), Sauer
patent: 3820047 (1974-06-01), Juhnke
patent: 3964008 (1976-06-01), Davis
patent: 4286244 (1981-08-01), Schuessler et al.
patent: 4296676 (1981-10-01), Andrews et al.
patent: 4437078 (1984-03-01), Bando et al.
patent: 4437081 (1984-03-01), Wyatt

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