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. 21, 1985
Filed:
Aug. 30, 1983
Applicant:
Inventors:
Frederick M Lewis, Mountain View, CA (US);
George A Berken, Kronenwetter, WI (US);
Assignee:
Zimpro Inc., Rothschild, WI (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F23G / ;
U.S. Cl.
CPC ...
110346 ; 110187 ; 110190 ; 110210 ; 236 / ; 236 / ; 431 76 ;
Abstract
A two-stage starved air furnace system is controlled to simultaneously achieve desired temperatures and percent stoichiometric air operation in the primary stage by modulating transformation relay functions acting upon measured temperature deviations to change both primary combustion air and primary auxiliary burner operation. At the set-point value of percent stoichiometric air, the relay functions are modulated in reverse direction to satisfy changing heat demands.