Electric heating – Heating devices – With heater-unit housing – casing – or support means
Patent
1975-05-09
1976-10-19
Mayewsky, Volodymyr Y.
Electric heating
Heating devices
With heater-unit housing, casing, or support means
156275, 156380, 219544, 285 21, 264 27, H05B 358
Patent
active
039872769
ABSTRACT:
A weldable subassembly for connecting branch pipes to a molded plastic main pipe is formed with a pair of hinged arcuate members adaptable to be placed around the main pipe and welded thereto by electrical current passed through an interposed mat containing electrical heating wires. The arcuate members are pivotally interconnected by a hinge member which extends on one side thereof longitudinally of the main pipe, and which enables separation of the opposite side of the arcuate members so that they may be placed about the pipe. The opposite sides of the arcuate members form a slight gap therebetween which also extends longitudinally of the main pipe and the heating wire mat has a longitudinal edge which is attached, by welding or the like, to the inner surface of one of the arcuate members at a point intermediate the hinge member and the opposite side of the arcuate member.
REFERENCES:
patent: 3061503 (1962-10-01), Gould et al.
patent: 3062940 (1962-11-01), Bauer et al.
patent: 3094452 (1963-06-01), VonRiegen et al.
patent: 3240226 (1966-03-01), Burkholder
patent: 3406055 (1968-10-01), Rubel
patent: 3743566 (1973-07-01), Louthan et al.
patent: 3918748 (1975-11-01), Acda
Rechsteiner Hugo
Vogelsanger Kurt
Georg Fischer Aktiengesellschaft
Mayewsky Volodymyr Y.
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