Thermal type overload relay

Details Thermal type overload relay Thermal type overload relay

1986-04-07

1987-06-02

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

337 42, 337 79, H01H 7116

Patent

active

046707280

ABSTRACT:
A thermal-type overload relay which uses a bimetallic element for sensing overload currents includes a shifter controlled by the bimetallic element to shift a release lever to which is attached a spring. The spring controls a movable board which has two reversible stable positions corresponding respectively to turn off or on a pair of normally open contacts and a pair of normally closed contacts.The movable board is a molding of insulated material carrying a pair of spaced insulated contacts and also includes a segment which is externally visible to display an indication of which pair of contacts is open and which is closed.

REFERENCES:
patent: 3800260 (1974-03-01), Woodger

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