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:
May. 01, 1984
Filed:
Apr. 04, 1983
Donald J Schwalm, Northville, MI (US);
Holcroft & Company, Livonia, MI (US);
Abstract
Disclosed is a method of controlling the atmosphere of a heat-treating furnace whose atmosphere consists essentially of a carrier gas of CO, H.sub.2 and N.sub.2 produced from a mixture of methanol and nitrogen. In accordance with the present invention, the ratio of flow of methanol to flow of nitrogen is varied to maintain the CO content of the furnace atmosphere at a predetermined value. This renders more effective the control by conventional means of the flow of additive gases to maintain the carbon potential of the furnace atmosphere at a predetermined value. The flows of methanol and nitrogen may be controlled based on monitored CO content only, or their control may be interrelated to monitored carbon potential as well.