Polarized electromagnet relay

Details Polarized electromagnet relay Polarized electromagnet relay

1985-07-25

1986-11-04

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Polarity-responsive

335 79, H01H 5122

Patent

active

046212469

ABSTRACT:
A polarized electromagnet relay with reduced width and height is disclosed to have on a base plate an electromagnet block, an armature block with a permanent magnet and at least one contact assembly. The armature block is cooperative with the electromagnet block and is driven in response to the energization thereof to reciprocate between two operating positions so as to actuate the contact assembly for contact switching. The electromagnet block includes a generally E-shaped yoke with a pair of opposed side legs and a center leg defining a core around which the excitation coil is wound. The contact assembly is mounted on the lateral side of the base plate to be received between the adjacent side leg and the base plate so as not to add an extra dimension to the width of the relay. The yoke is configured to have the center leg or core displaced from the plane of the side legs toward the base plate in such a manner as to produce a more space above the core as well as between the core and each of the side legs for receiving the coil. By better utilization of such space the coil can be wound a greater number of turns without substantially projecting above that plane, so as not to add an extra dimension to the height of the relay, thus enabling the relay design of reducing both the width and the height while allowing the use of the coil with a greater number of turns.

REFERENCES:
patent: 4538126 (1985-08-01), Bando
patent: 4563663 (1986-01-01), Niekawa et al.

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