Electromagnetic differential current trigger

Details Electromagnetic differential current trigger Electromagnetic differential current trigger

1997-11-10

1998-12-15

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335251, H01F 700

Patent

active

058501703

ABSTRACT:
An electromagnetic differential current trigger is provided which includes a coil with a U-shaped yoke. A permanent-magnetic armature is guided axially inside the coil that retains the armature against a yoke leg opposing the force of a compression spring in the idle position, whereas a compression spring actuates a power switch via an actuation element given triggering by a differential current in the coil. The differential current trigger requires few parts and can be magnetically balanced in a fast and efficient manner.

REFERENCES:
patent: 2919324 (1959-12-01), Schuessler
patent: 3117257 (1964-01-01), Stone
patent: 5453724 (1995-09-01), Seymour et al.

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