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. 27, 1979
Filed:
Nov. 03, 1977
Applicant:
Inventor:
June R Bornor, Rockford, IL (US);
Assignee:
Alco Standard Corporation, Valley Forge, PA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21D / ; F27D / ;
U.S. Cl.
CPC ...
266 78 ; 236 / ; 266 89 ; 417280 ; 432205 ;
Abstract
Gas is circulated within the chamber of a heat treating furnace by a fan which is driven by an electric motor. The current drawn by the motor is detected and, when the current exceeds a predetermined magnitude, the density of the gas in the chamber is reduced to prevent an excessive load from being imposed on the motor. The density of the gas is reduced by shutting off the flow of gas to the chamber and by exhausting gas from the chamber.