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:
Jan. 17, 1989
Filed:
Jul. 08, 1987
Applicant:
Inventor:
Constantine D Pezaris, Nahant, MA (US);
Assignee:
Environmental Fragrance Technologies, Ltd., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
219272 ; 219497 ; 219501 ; 236 / ;
Abstract
A driver circuit having a predetermined on time and a predetermined off time provides a drive signal to a heating element of an aroma generating apparatus. The drive signal is applied during each positive half cycle of the input AC voltage while maintaining the gate of a silicon controlled rectifier saturated over the entire positive and negative cycles of the input AC voltage.