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. 05, 1992
Filed:
Mar. 12, 1990
Applicant:
Inventors:
Johathan B Arold, Exeter, NH (US);
Joan L Mishou, Portsmouth, NH (US);
Charles R Parent, Durham, NH (US);
Joseph P Stark, New Market, NH (US);
Edward A Webb, Wolfeboro, NH (US);
Assignee:
GTE Products Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F24H / ;
U.S. Cl.
CPC ...
392360 ; 392365 ; 392379 ; 392478 ; 392476 ; 219542 ;
Abstract
A forced gas electric heater has a serpentine heating element in series with a preheat coil. Gas to be heated first flows through the preheat coil before flowing through the serpentine heating element. A thermistor is disposed between two adjacent turns of the preheat coil. The thermistor controls the 'on' time of a solid state power control device which is in series with the preheat coil and the serpentine heating element.