Electroweldable socket and a device of manufacturing such a sock

Details Electroweldable socket and a device of manufacturing such a sock Electroweldable socket and a device of manufacturing such a sock

1985-03-14

1987-01-06

Griffin, Donald A.

Electric heating

Heating devices

With heating unit structure

285 21, H05B 358, F16L 1302

Patent

active

046348441

ABSTRACT:
An electroweldable socket comprising a conducting wire or gauze near the inner wall of the socket, the socket being manufactured by feeding conducting metal wire or gauze to a transverse extrusion head of an extruder and cutting the pipe extruded from the extruder to a socket length.
Conducting wire may be fed to the extrusion head after having been wound to a helical spiral, the helical spiral may also be formed in the extrusion head or supplied accommodated in an outer groove of a thin walled tube having a helically extending outer groove. The wire may also be supplied as a hose assembled from said wires.
Gauze is supplied in a pipe form obtained from a strip.
The wire may comprise sections of helical spirals of mutally different pitch.
Windings or groups of windings may be short-circuited.
The socket is provided with connections for connecting to an electrical source if a conducting wire is present.
A device for manufacturing the socket comprises an extruder with a transverse extrusion head and an orifice for supplying conducting wire or gauze to the extrusion head.

REFERENCES:
patent: 2253627 (1941-08-01), Knowles
patent: 2506574 (1950-05-01), Boydstun
patent: 3061503 (1962-10-01), Gould et al.
patent: 3215761 (1965-11-01), Gelpey
patent: 4224505 (1980-09-01), Sturm
patent: 4365144 (1982-12-01), Reich et al.
patent: 4530520 (1985-07-01), Nyffeler et al.

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