Small, economical and stable polarized electromagnetic relay hav

Details Small, economical and stable polarized electromagnetic relay hav Small, economical and stable polarized electromagnetic relay hav

1993-01-04

1993-11-23

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Polarity-responsive

335202, H01H 5122

Patent

active

052648125

ABSTRACT:
A polarized electromagnetic relay has two electromagnetic relay portions each constituted by a first yoke, second yoke, coil, movable core, card, and the like. The first yoke and the second yoke are used to flow a magnetic flux caused by a permanent magnet in the movable core in the same direction as a magnetic flux caused by the magnetization of the coil, and thus electrical power flowing in the magnetized coil can be small, or an area occupied by the coil can be small. Therefore, a small size and economical polarized electromagnetic relay having two groups of electromagnetic relays can be provided, and a stable operation regardless the states of magnetization or non-magnetization of one or both coils of the two electromagnetic relay portions can be realized.

REFERENCES:
patent: 4617541 (1986-10-01), Chuang
patent: 4959627 (1990-09-01), Iizumi et al.

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