Transfer-type electromagnetic relay comprising a permanent magne

Details Transfer-type electromagnetic relay comprising a permanent magne Transfer-type electromagnetic relay comprising a permanent magne

1983-07-06

1985-02-12

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Polarity-responsive

335 81, H01H 5122

Patent

active

044994427

ABSTRACT:
In a transfer-type electromagnetic relay comprising first and second lead members (26, 27) for first and second fixed contact studs (31, 32), respectively, and a third lead member (28) for an armature (36), first and second permanent magnets (46, 47) are directed to back surfaces of the first and the second lead members, respectively, with poles of the same name brought nearer to the respective leads. A single permanent magnet may be placed in the above-mentioned manner. Preferably, first and second arm members (43a, 43b) are attached to a leaf spring (37') fixed to the armature and extended from a central portion of the leaf spring on both sides thereof in directions different from each other. The leaf spring is manufactured without any bend and is therefore substantially flat. The third lead member partially comprises a non-magnetic portion at a center area thereof to support the armature. In order to provide make-before-break contacts, an armature height is rendered lower than a sum of a fixed contact height and a movable contact height given by each fixed contact stud and each movable contact stud.

REFERENCES:
patent: 4160965 (1979-07-01), Kobler et al.
patent: 4215329 (1980-07-01), Kobler
patent: 4225835 (1980-09-01), Vrsnak et al.
patent: 4342016 (1982-07-01), Yokoo et al.

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