Fuse housing end caps secured by magnetic pulse forming

Details Fuse housing end caps secured by magnetic pulse forming Fuse housing end caps secured by magnetic pulse forming

1975-11-19

1977-12-13

Harris, George

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

72 56, 337186, H01H 8514

Patent

active

040632083

ABSTRACT:
End ferrules of a current limiting fuse are mounted to the end of a relatively fragile non-metallic insulator housing of the fuse by magnetic pulse forming. The end ferrules are formed so that there is a flat circular end wall and an annular mounting flange. The flat circular end walls are of a first thickness sufficient to withstand mechanical forces that may be experienced due to fuse operation or due to mounting of the fuse. The annular mounting flange is of a second thickness less than the first thickness so that the flange can be compressed around the housing by magnetic pulse forming without causing undue stress to be exerted on the housing that may result in damage to the housing. A unique elastomer ring seal is provided between the housing and the end ferrule to assure a moisture tight seal. The method disclosed is applicable to allow compressive attachment of a variety of metallic members to a variety of relatively fragile members so that the strength of the metallic member may be maintained, but the metallic member may be compressed without damage to the fragile member.

REFERENCES:
patent: 3250879 (1966-05-01), Jacobs
patent: 3313536 (1967-04-01), Dutton et al.
patent: 3333336 (1967-08-01), Cameron et al.
patent: 3438115 (1969-04-01), Humphress et al.
patent: 3529270 (1970-09-01), Kozacka
patent: 3848325 (1974-11-01), Bimba
patent: 3967228 (1976-06-01), Koch et al.

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