Thermal-magnetic switch

Details Thermal-magnetic switch Thermal-magnetic switch

1977-11-01

1979-10-02

Harris, George

Electricity: electrothermally or thermally actuated switches

With separate distinct diverse art-type switching device

337145, H01H 3702

Patent

active

041699998

ABSTRACT:
A remotely actuable switch includes a housing defining a cavity having first and second thermally separated chambers, each enclosing a pair of spaced electrical contacts and each having an associated heating element. An electrically conductive fusible element occupies one of the chambers and electrically bridges the spaced contacts therein. To activate the switch the first heating element is activated to melt the fusible element, allowing a Lorentz force resulting from an applied external magnetic field and from current passing between the bridged contacts to expel the melted fusible material from the first chamber into the second chamber. A helical passage may be used as an alternative to a cavity with discrete chambers.

REFERENCES:
patent: 2599441 (1952-06-01), Ekman
patent: 3043937 (1962-07-01), Milton et al.
patent: 3462573 (1969-08-01), Rabinowitz et al.
patent: 3660794 (1972-05-01), Brizzolara
patent: 3947798 (1976-03-01), Zankl
patent: 3964010 (1976-06-01), Tasuku

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