Miniature time-delay fuse

Details Miniature time-delay fuse Miniature time-delay fuse

1976-04-16

1977-11-08

Harris, George

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337166, H01H 8504

Patent

active

040577740

ABSTRACT:
A time-delay fuse is provided comprising a glass or ceramic tube sealed at both ends with sealing means such as, e.g., ferrules. An elongated generally cylindrical core member, made from a highly heat conductive material (a sintered blend of aluminum oxide and magnesium oxide spinel), is diagonally disposed in said tube and rigidly fixed at both ends in intimate contact with said sealing means. The fuse also comprises a wire strand spirally wound on said elongated core member. The wire strand is made by winding a first metallic wire element over a second mutually fusible wire element and is soldered at both ends with a high melting solder element.

REFERENCES:
patent: 3144534 (1964-08-01), Baumbach
patent: 3267238 (1966-08-01), Arikawa et al.
patent: 3869689 (1975-03-01), Kasamatu

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