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:
Apr. 19, 1977
Filed:
Jun. 07, 1976
Harold D Wells, St. Louis County, MO (US);
E Warner Hughes, Ballwin, MO (US);
Robert F Bales, Maryland Heights, MO (US);
Black Body Corporation, Fenton, MO (US);
Abstract
An infrared emitter panel comprising a body of refractory material, a non-helical continuous heating element of serpentine form embedded within said refractory material and having opposed ends projecting through said refractory material for connection in circuit to a source of electrical power. Said body of refractory material is provided with expansion zones adjacent each of the hair pin-like bent ends of said heating element for allowing unimpeded linear expansion and contraction of said heating element upon energization and de-energization respectively. The invention also comprehends a method for forming an infrared emitter panel comprising embedding a non-helical heating element of serpentine form within a non-dried slurry of refractory material and then causing a current to pass through said heating element for causing the development of expansion zones within the refractory material for expansion and contraction of the same as well as for curing and drying the refractory material to render same integrated into compact operational form.