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. 03, 1977
Filed:
Aug. 15, 1975
Milton Robert Schulte, Quakertown, PA (US);
George Albert Swartz, Quakertown, PA (US);
Thermal Developments, Inc., Quakertown, PA (US);
Abstract
A flue gate device operated by a solenoid whose energy comes from any outside source, which energy is controlled by the furnace burner control of the furnace to which it is attached. The pull of the solenoid is resisted by a spring which will restore the flue gate to an open position when the solenoid is deenergized or in case of an electrical failure in the flue gate device itself. Through relay switches, the solenoid is deenergized when the furnace burner is energized, and the solenoid is energized when the burner is deenergized, thus enabling a 'fail-safe' condition, which enables the furnace to function completely free of the flue gate device.