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:
Feb. 15, 1994
Filed:
May. 22, 1992
Applicant:
Inventors:
Bryan L Lakin, Nixa, MO (US);
David B Hyppio, Springfield, MO (US);
Assignee:
Fasco Industries, Inc., Cassville, MO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F24H / ; H02H / ;
U.S. Cl.
CPC ...
318459 ; 361 33 ; 361170 ; 110193 ; 236D / ;
Abstract
An electronic safety circuit for a portable gas heater includes a transformer and half wave rectifier connected in parallel with a fan motor for charging a capacitor, and a solid state switching circuit, which may be either a pair of cascaded transistors, an SCR, or a Darlington switch, for applying a reverse polarity voltage across the solenoid of a solenoid operated gas valve to immediately turn off the gas valve in the event of loss of power to the combustion fan motor. The electronic safety circuit may be conveniently mounted on a PC board and enclosed in the combustion fan motor.