Single phase/three phase heater element circuit for a ceramic fi

Details Single phase/three phase heater element circuit for a ceramic fi Single phase/three phase heater element circuit for a ceramic fi

1994-12-12

1997-01-28

Evans, Geoffrey S.

Electric heating

Heating devices

With heater-unit housing, casing, or support means

219539, 219483, 219406, H05B 302, H05B 334, A21B 122

Patent

active

055975020

ABSTRACT:
A single phase and three phase heater element circuit for a ceramic fiber heater wherein a plurality of blocks each of which is formed by a plurality of heater elements arranged side by side on a base of insulation material and connected to one another to form a series circuit, said series circuit being connected across an electric power source, and adjacent ends of the series circuits in adjacent blocks being connected to the same terminal of said electric power source. By connecting adjacent ends of adjacent blocks of ceramic fiber heater element circuits together, the ends of the series circuit connected to separate terminals of the power source are spaced sufficiently far apart from each other such that current flow through the insulation material between ends adjacent the blocks is minimized and preferably substantially prevented for preventing short circuiting and failure of the heater.

REFERENCES:
patent: 3500444 (1970-03-01), Hesse et al.
patent: 3636309 (1972-01-01), Deaton et al.
patent: 3979576 (1976-09-01), Janson
patent: 4217483 (1980-08-01), Vogel et al.
patent: 4575619 (1986-03-01), Poretzky
patent: 5438914 (1995-08-01), Hohn et al.

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