Electro-fusion fitting and control apparatus therefor

Details Electro-fusion fitting and control apparatus therefor Electro-fusion fitting and control apparatus therefor

1982-09-27

1984-12-04

Mayewsky, Volodymyr Y.

Electric heating

Heating devices

With heating unit structure

1563801, 219535, 219541, 285 21, 285292, H05B 358

Patent

active

044866500

ABSTRACT:
An electro-fusion fitting for coupling thermoplastic pipes incorporates a heating coil (2) and has a resistor (6) with a value chosen in accordance with the power to be supplied to the coil connected between a main terminal (4) and an auxiliary terminal (5). Control apparatus is adapted to sense the resistance value and supply electric current to the coil for a predetermined time set automatically according to the resistance value.

REFERENCES:
patent: 3789192 (1974-01-01), Spindler
patent: 4253011 (1981-02-01), Hinz

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