Core member for an electromagnetic relay

Details Core member for an electromagnetic relay Core member for an electromagnetic relay

1983-05-19

1986-01-07

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Polarity-responsive

335 79, 335 80, H01H 5122

Patent

active

045636630

ABSTRACT:
One end of a yoke is arranged near one end of an iron core of an electromagnet. The other end of the yoke is coupled to the other end of the iron core. The one end of the yoke has side walls which oppose the side surfaces of the one end of the iron core, and a bottom which opposes the bottom of the iron core. The magnetic pole at the other end of the iron core is guided to the other end of the yoke. A movable member is disposed at the one end of the iron core. The movable member comprises a permanent magnet disposed at the center of a frame, and iron pieces, one end of each of which abuts against the poles of the permanent magnet. The movable member partially surrounds the iron core so that the iron pieces are located between the iron core and the side walls of the yoke. The movable member is moved in the direction perpendicular to the axis of the iron core by the sum of the magnetic fields of the permanent magnet and the electromagnet. A contact mechanism is arranged near the electromagnet and is driven by projections formed on the movable member.

REFERENCES:
patent: 3022400 (1962-02-01), Ahlefeldt
patent: 4142166 (1979-02-01), Arnoux
patent: 4334748 (1982-06-01), Stacklies et al.
A book (in Japanese) entitled "How to Select and Use Relays", issued by Ohm Co., Ltd. on Aug. 31, 1976, p. 19, Fig. 1.32.

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