Position indicating pulse latching solenoid

Details Position indicating pulse latching solenoid Position indicating pulse latching solenoid

1974-11-20

1977-01-18

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 79, 335154, H01H 7312

Patent

active

040042588

ABSTRACT:
A position indicating pulse latching solenoid has a plunger of paramagnetic steel, movable between two stops of similar material, and fixed permanent magnets which impart a flux to the plunger causing it to adhere to the stop to which it is moved, movement being accomplished by a respective winding about each stop which when excited by an electrical pulse momentarily exerts an attractive force on the plunger. A reed switch senses the momentary flux generated by the excited winding at a leakage gap near one of the stops and also determines whether the flux imparted to the plunger by the permanent magnets has shifted with the plunger to or away from the gap to indicate plunger position.

REFERENCES:
patent: 2853659 (1958-09-01), Herion
patent: 2919324 (1959-12-01), Schuessler
patent: 3390361 (1968-06-01), Bodge
patent: 3568008 (1971-03-01), Tanimura et al.
patent: 3605054 (1971-09-01), Conrath
patent: 3792390 (1974-02-01), Boyd
patent: 3828288 (1974-08-01), Boyd

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