Electric welding muff

Details Electric welding muff Electric welding muff

1977-03-14

1978-09-26

Mayewsky, Volodymyr Y.

Electric heating

Heating devices

With heating unit structure

156380, 219535, H05B 358

Patent

active

041173112

ABSTRACT:
A thermoplastic synthetic resin sleeve to be slipped over the end of a tubular member to be joined to another such member has a winding of resistance heating wire adjacent the inner surface of the sleeve. Connectors at the ends of the wire are provided to connect the wire to a source of electrified power. Small diameter wire is chosen, the resistance thereof being selected as an inverse function of sleeve diameter, so that an unregulated source of power can be used. A visual indication is provided to indicate when a good weld joint has been made.

REFERENCES:
patent: 915974 (1909-03-01), Leonard
patent: 2499961 (1950-03-01), Lennox
patent: 2689803 (1954-09-01), Ackerman
patent: 3062940 (1962-11-01), Bauer et al.
patent: 3943334 (1976-03-01), Sturm
patent: 3987276 (1976-10-01), Vogelsanger et al.

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