Industrial electric heating furnaces – Glass furnace device – Joule effect heating
Patent
1982-01-26
1984-03-06
Envall, Jr., Roy N.
Industrial electric heating furnaces
Glass furnace device
Joule effect heating
C03B 5027
Patent
active
044358113
ABSTRACT:
An electric glass-melting furnace is disclosed having a first embodiment comprising: a chamber adapted for holding a body of molten glass, such for withdrawing molten glass therefrom, an arc electrode positioned in the body of molten glass; first and second electrodes positioned in the body of molten glass; a reactance means comprising a coil wound on a core, such coil having a first and second end and a center tap, the first end of the coil being connected to the first electrode and the second end of the coil being connected to the second electrode; and means for supplying electrical power to the arc electrode and the first and second electrodes, a first terminal of the power supplying means being connected to the arc electrode and a second terminal being connected to the center tap. The current flow through the first and second electrode is equalized by the coil. This embodiment may be modified to use a three phase power supply for powering three arc electrodes. A second embodiment of the invention uses only resistive heating produced by equalized current flow through individual electrodes which are contained in first and second arrays of n electrodes disposed within the glass. A third embodiment of the invention uses a combination of resistance heating electrodes and an arc electrode in which the current flow is equalized through individual electrodes that are contained in first and second arrays of n electrodes disposed within the glass. The third embodiment may be modified to use a three phase power supply for powering three arc electrodes.
REFERENCES:
patent: 2314956 (1943-03-01), Slayter et al.
patent: 3182112 (1965-05-01), Torok
Envall Jr. Roy N.
Hudgens Ronald C.
Owens-Corning Fiberglas Corporation
Pacella Patrick P.
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