Small, economical and stable polarized electromagnetic relay having two groups of electromagnetic relay portions
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United States of America Patent
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Nov 23, 1993
Grant Date -
N/A
app pub date -
Jan 4, 1993
filing date -
May 19, 1992
priority date (Note) -
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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.
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