Electromagnetic relay with an operation indicating member

Details Electromagnetic relay with an operation indicating member Electromagnetic relay with an operation indicating member

1988-09-01

1989-12-26

Broome, H.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

H01H 7312, H01H 7500, H01H 7700

Patent

active

048900800

ABSTRACT:
An electromagnetic relay with an operation indicating member comprises a housing including a base and a case having a window, a switching unit including an electromagnet, terminals disposed on the base, contacts fixed to the terminals, and an operation indicating member. Terminals and contacts are heated by arc discharge during switching action of the relay and by current flowing through the terminals. The indicating member is, however, not heated because the indicating member is disposed at a location away from the heated components. The indicating member is thus prevented from being deformed by the heat generated from the contacts. Consequently, the indicating member can invariably be seen through a window in the case.

REFERENCES:
patent: 4771253 (1988-09-01), Sasaki et al.

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