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:
Oct. 10, 1978
Filed:
Dec. 17, 1976
Emery G Audesse, Williamsport, PA (US);
Robert M Griffin, South Hamilton, MA (US);
Max E Oberlin, Lynn, MA (US);
GTE Sylvania Incorporated, Danvers, MA (US);
Abstract
An electric heating element for igniting gas fuel comprises a hermetically sealed envelope made of at least 99% pure alumina and filled with a non-oxidizing gas such as hydrogen or one of the inert gases. A self-supporting coiled coil of tungsten or other refractory metal conductor dimensioned to carry a linear power loading of at least one hundred watts per inch is disposed in the envelope with coiling of the coiled coil pressing the peripheral surfaces of the coiled conductor into thermal and mechanical contact with the interior wall of the envelope. Terminals are provided for supplying current to the conductor at said power loading to heat the exterior of the envelope wall to a temperature above 900.degree. centigrade.