Release electromagnet assembly

Details Release electromagnet assembly Release electromagnet assembly

1978-07-17

1980-12-02

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335 79, 335179, H01F 708

Patent

active

042374391

ABSTRACT:
A release electromagnet assembly having a permanent magnet associated with a movable member and which also includes an electromagnet cooperating with the magnet to produce a magnetic attraction therebetween which is effective to constrain the movable member and which is effective to produce a force of repulsion opposing the attraction of the permanent magnet, thereby releasing the movable member for free movement. The permanent magnet has an end pole of a single polarity where it abuts against the electromagnet so that the flux from the magnet partly passes through an external magnetic path external to the yoke of the electromagnet. When energized, the electromagnet produces a flux passing through a magnetic path which is provided internally of the yoke and which opposes the flux from the permanent magnet, thus releasing the movable member from its constraint applied by the permanent magnet.

REFERENCES:
patent: 2876397 (1959-03-01), Wasson
patent: 3775715 (1973-11-01), Bosch et al.
patent: 4054888 (1977-10-01), Kozuki et al.

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