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:
Jul. 07, 1992
Filed:
Sep. 25, 1990
Applicant:
Inventors:
Emil R Plasko, Lexington, OH (US);
James A Tennant, Perrysville, OH (US);
Assignee:
Therm-O-Disc, Incorporated, Mansfield, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
219497 ; 219505 ; 219506 ; 219494 ; 340584 ;
Abstract
A heating element control includes a ceramic substrate having a resistance circuit thereon of a material having a positive temperature coefficient. A first comparator compares the resistance of the circuit with a first known resistance to control a signal light. A second comparator compares the resistance of the circuit with a second known resistance to control a heating element.