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:
Feb. 03, 1981
Filed:
Apr. 06, 1979
Applicant:
Inventors:
Charles W Smith, Jr, Fairview, PA (US);
Franz X Zimmerman, Erie, PA (US);
Assignee:
Autoclave Engineers, Inc., Erie, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F27B / ; F27D / ; H05B / ;
U.S. Cl.
CPC ...
13 25 ; 13 22 ; 219406 ;
Abstract
This invention relates to an electric furnace and, in particular, an electric furnace having graphite rod heating elements electrically connected into more than one series circuit. In this way, the heating elements can be arranged to provide individually controllable heating zones. The heating elements are supported by hollow graphite cylinders and flanges extending radially inward from the hollow cylinders. The rod heating elements extend upwardly from the flanges being held near the lower ends thereof.