Electric heating – Metal heating – Weld rod structure
Patent
1984-08-06
1985-11-26
Envall, Jr., Roy N.
Electric heating
Metal heating
Weld rod structure
219 70, 2191451, B23K 924
Patent
active
045556156
ABSTRACT:
A carbon rod assembly is disclosed which includes a first carbon rod piece having a projection at one end thereof and a second carbon rod piece having a socket hole at one end thereof. External and internal screw threads of 1/2 to 3 turns are formed on the projection and socket hole respectively, so that the first and second carbon rod pieces are firmly connected by inserting the projection into the socket hole and thereafter rotating the carbon rod pieces relative to each other.
REFERENCES:
patent: 3030544 (1962-04-01), Zamboldi et al.
patent: 3633063 (1972-01-01), Ando
patent: 3796853 (1974-03-01), Matsuo et al.
patent: 4349910 (1982-09-01), Belz
patent: 4395617 (1983-07-01), Maeda et al.
Iwai Yasuro
Mizutani Takayuki
Yasuda Haruo
Yoshida Kunihiko
Envall Jr. Roy N.
Ibigawa Electric Industry Company, Ltd.
Sigda C. M.
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