Electric relay with a thermistor associated with a casing enclos

Details Electric relay with a thermistor associated with a casing enclos Electric relay with a thermistor associated with a casing enclos

1986-12-02

1988-04-19

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Expansible or vaporizable fluid-actuated

337394, H01H 6102, H01H 3748

Patent

active

047392975

ABSTRACT:
An electric relay has a casing enclosing a thermally expandable mass associated with a thermistor (PTC) as a heat source, connected to an electric excitation circuit. A rod projects from said casing to come in contact with a rocker lever which, in conjunction with the reaction of a spring, causes a second spring to bend. The bending second spring moves an armature comprising a contact point, so that the contact point comes in contact with a second fixed contact point, thus closing an electric circuit. The elastic reaction of the springs and a tooth on the rocker lever bring the relay back to the resting position when power to the thermistor is interrupted.

REFERENCES:
patent: 3166893 (1965-01-01), Sherwood

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