Protector for electric circuits

Details Protector for electric circuits Protector for electric circuits

1976-05-20

1978-07-18

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337290, H01H 8510

Patent

active

041018605

ABSTRACT:
The fusible element of a single-element, dual-function, electric fuse is disposed within a passage within a housing of inorganic ceramic material which has a high thermal conductivity; and the major portion of that fusible element is displaced radially from the axis of that passage to be in intimate heat-transferring relation with one side of that passage. Two of the "weak spots" of that fusible element are in close heat-transferring relation with the terminals of that electric fuse; and a portion of that fusible element which is intermediate those two weak spots is in intimate heat-transferring relation with the opposite side of that passage. The resulting transference of heat from that fusible element to that passage enables those two weak spots to continuously carry the rated current of that fusible element even though those two weak spots have very small cross sections, and hence are able to provide desirable current-interrupting action.

REFERENCES:
patent: 2682587 (1954-06-01), Burt et al.
patent: 2833891 (1958-05-01), Jacobs
patent: 2982835 (1961-05-01), Kozacka
patent: 3291942 (1966-12-01), Kozacka
patent: 3394333 (1968-07-01), Jacobs
patent: 3938067 (1976-02-01), Fister

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