Electromagnetic relay

Details Electromagnetic relay Electromagnetic relay

1990-03-19

1991-06-25

Picard, Leo P.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Polarity-responsive

335 83, 335202, H01H 5128

Patent

active

050270940

ABSTRACT:
An electromagnetic relay, comprising: a box-shaped casing having a bottom wall, a pair of side walls, a pair of end walls, and a top wall, an electromagnet unit received in the casing with its axial direction extending in parallel with the top, bottom and side walls of the casing; and at least one contact unit mounted on the top wall; one of the end walls being provided with an opening for receiving the electromagnet unit therefrom. The inner surfaces of the side walls of the casing are provided with guide grooves extending along a longitudinal direction of the casing for guiding side ends of the yoke when receiving the electromagnet unit into the casing. Thus, simply by press fitting only the electromagnet unit from the opening provided in one of the end walls of the casing, the electromagnet unit may be securely received in the box-shaped casing. This facilitates the required assembly work and permits the use of automated machines for the assembly work. Typically, the electromagnet unit is fixedly and sealingly secured in the casing with an adhesive agent.

REFERENCES:
patent: 4578660 (1986-03-01), Hanada et al.
patent: 4688010 (1989-08-01), Nobutuki et al.
patent: 4707675 (1987-11-01), Motoyama et al.

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