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:
Sep. 07, 1982
Filed:
May. 07, 1980
Charles F Drexel, Rolling Hills Estates, CA (US);
Tylan Corporation, Carson, CA (US);
Abstract
A tubular furnace, such as a diffusion furnace, having a temperature controlled central region bounded by end walls heated to the temperature of the central region, at least one of said end walls being movable to and from the outer edge of said central region. By means of a temperature-sensing feed-back circuit, the entire temperature controlled region can be maintained at a predetermined isothermal condition, or a temperature gradient can be maintained by heating one of the end walls to a specified higher temperature and heating the other to a specified lower temperature. A combustor, for example for an exothermic chemical reaction, can be located within a guard heater adjacent one of the end walls.