Metal working – Method of mechanical manufacture – Electrical device making
Patent
1976-11-11
1978-02-28
DiPalma, Victor A.
Metal working
Method of mechanical manufacture
Electrical device making
29421R, 29421M, 29523, 337201, H01H 6902
Patent
active
040757552
ABSTRACT:
A method of attaching one tubular member such as a hollow metallic conducting tube to another tubular member such as a hollow insulator tube of a high voltage fuse comprises the steps of inserting the metallic tube into the insulator tube to a desired location and then expanding the metallic tube radially outwardly at a position where engagement is desired until the metallic tube engages and at least partially fills an annular groove on the interior of the insulator tube. To further provide a moisture tight seal at the point of engagement, an elastomeric compound such as a room-temperature-vulcanizing silicone rubber may be placed in the groove to assure a moisture tight seal when the metallic tube is expanded. The exterior of the insulator tube is slightly deformed due to expansion of the metallic tube, and the quality of the connection between the tubes may be determined by the amount of this slight deformation. Also disclosed is a novel fuse produced by this method.
REFERENCES:
patent: 2709092 (1955-05-01), Wallace
patent: 3176100 (1965-03-01), Barta
patent: 3313536 (1967-04-01), Dutton et al.
patent: 3432916 (1969-03-01), Fisher et al.
patent: 3555831 (1971-01-01), Pogonowski
patent: 3590464 (1971-07-01), Wildi
patent: 3893056 (1975-07-01), Harner
Bernatt Joseph
Steegmueller Alfred
DiPalma Victor A.
S&C Electric Company
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