Electricity: circuit makers and breakers – High-potential type – Rotating and pivoted
Patent
1975-05-14
1977-05-24
Askin, Laramie E.
Electricity: circuit makers and breakers
High-potential type
Rotating and pivoted
174165, 174171, 174177, 174196, 403268, H01H 3100, H01B 1716
Patent
active
040257410
ABSTRACT:
A cylindrical porcelain insulator having a depressed opening in at least one end thereof is utilized as a support member. An elongated steel stud having a threaded end and an enlarged securing end is disposed in the depressed central opening of the porcelain insulator. The enlarged securing end has circumferential lateral ridges and depressions for providing an enlarged surface area. Babbit or epoxy material is disposed in the remaining volume of the depressed opening. The securing end of the stud is therefore suspended in the hardened babbit or epoxy material, which in turn is affixed to the sides of the depressed opening, thus affixing the stud to the insulator. The stud has a relatively flat circumferential lateral shoulder at the upper end thereof which protrudes above the end of the insulator and out of the depressed opening. An electrical bus bar or bus bar retaining apparatus is disposed around the threaded portion of the stud to rest on the flat shoulder in a flat surface to flat surface relationship. Fastening means, such as a nut, is threaded onto the stud and torqued against the bus bar or bus bar retaining apparatus. The torquing stress provided to the bus bar is directed against the flat shoulder rather than the babbit material. When the bus bar or bus bar assembly has been thus secured to the stud with a predetermined amount of torque, the bus bar assembly will remain reliably affixed in place at that value of torque over a relatively long period of time and even when exposed to significant variations of temperature.
REFERENCES:
patent: 946623 (1910-01-01), Varney
patent: 955065 (1910-04-01), Hardin
patent: 1958435 (1934-05-01), Hawley
patent: 2879323 (1959-03-01), Nichols et al.
patent: 2967903 (1961-01-01), Mageoch
patent: 3585277 (1971-06-01), Lewis
patent: 3925599 (1975-12-01), Cleaveland
Askin Laramie E.
Moran M. J.
Westinghouse Electric Corporation
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