The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 13, 2000
Filed:
Dec. 23, 1998
J Kenneth Wittle, Chester Springs, PA (US);
Richard A Hamilton, Aston, PA (US);
Peter James Wilver, Valley Township Montour County, PA (US);
Electro-Pyrolysis Inc, Wayne, PA (US);
Svedala Industries Inc., Danville, PA (US);
Abstract
In an arc furnace or melter furnace employing concentric graphite inner and outer electrodes, the accumulations of tolerances, distortion and mechanical forces can cause a loss of concentricity leading to reduced performance and eventually to electrode degradation. To avoid that condition, a plurality of insulating spherical or cylindrical spacers are disposed in the annular gap between the inner and outer electrodes. The spacers are held in position by arcuate recesses in the outer surface of the inner electrode or in the inner surface of the outer electrode. The electrodes may be constructed in segments that are assembled by threading one segment into another segment.