Adjusting device for thermal overload relay

Details Adjusting device for thermal overload relay Adjusting device for thermal overload relay

1985-12-06

1987-02-10

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

337 57, 335 45, H01H 6100, H01H 7116

Patent

active

046425985

ABSTRACT:
A thermal overload relay of the type which uses a shifter to transmit thermal bending of the main bimetallic element to one end of the temperature compensating bimetallic element which is connected to a release lever which controls the closing of the relay and which includes an adjusting link which has an eccentric stem whose degree of rotation controls the setting of the release lever. As a calibration control to correct for unintended manufacturing variations and aging effects, the adjusting link supports an adjustment pin with an eccentric stem which abuts the eccentric stem of the adjusting dial to provide further control of the setting of the release lever.

REFERENCES:
patent: 3903493 (1975-09-01), Richards et al.
patent: 4023132 (1977-05-01), Kidd et al.

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