Electromechanical relay

Details Electromechanical relay Electromechanical relay

1989-07-07

1990-08-14

Broome, H.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With longitudinally expansible solid element

337393, H01H 6106, H01H 3746

Patent

active

049490613

ABSTRACT:
An electromechanical relay for the activation of at least one operating circuit, has an activator (10, 110) for example in the form of a helix made of a material having form-restoring or shape memory properties. A reset element (17, 117) holds the actuator in a distorted position opposite to that of its original position as long as an electrical heating current does not flow through the actuator. When the heating current, also referred to as switching current, is passing through the actuator, the latter returns to its original position or shape against the force of the reset spring thereby activating, through an operating member, a number of contact pairs of an operating circuit.

REFERENCES:
patent: 3594674 (1971-07-01), Willson
patent: 3634803 (1972-01-01), Willson et al.
patent: 3846679 (1974-11-01), Jost et al.
patent: 4275370 (1981-06-01), Sims
patent: 4524343 (1985-06-01), Morgan et al.
patent: 4675642 (1987-06-01), Reiferscheid

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