Method and means for segmentally reducing heat output in a heat-

Details Method and means for segmentally reducing heat output in a heat- Method and means for segmentally reducing heat output in a heat-

1978-02-14

1979-01-02

Bartis, A.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

137341, 138 33, 219 1051, 219301, H05B 300, F16L 5300

Patent

active

041328841

ABSTRACT:
An improvement in a heat-generating pipe made up of a ferromagnetic pipe having an insulated conductor extending through it to a given point so that both the pipe and conductor may be connected in series with a power source of alternating current. The invention is directed to both a method and nonferromagnetic means for reducing the heat output over a desired segment of the pipe by reducing the magnetic field created by the alternating current flowing in the insulated conductor and that segment of the pipe.
The nonferromagnetic means comprises an electrically nonconductive, nonferromagnetic section of pipe connected in place of the segment of the ferromagnetic pipe and shunted by a second conductor connected at each end of the nonferromagnetic pipe to the ferromagnetic pipe.

REFERENCES:
patent: 3293407 (1966-12-01), Ando
patent: 3575581 (1971-04-01), Ando
patent: 3629551 (1971-12-01), Ando
patent: 3632976 (1972-01-01), Ando
patent: 3780250 (1973-12-01), Ando

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