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:
Apr. 22, 1997
Filed:
Apr. 24, 1995
Applicant:
Inventors:
Bruce H Kamens, Thomaston, CT (US);
Victor E Shiff, Wolcott, CT (US);
Assignee:
Timex Corporation, Middlebury, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G04B / ; H05B / ;
U.S. Cl.
CPC ...
3151693 ; 315246 ; 368 68 ; 368 69 ; 368 67 ;
Abstract
A drive circuit having a converter that provides current pulses that charge a capacitive electroluminescent (EL) lamp to produce light, a switching circuit that switches successive current pulses for progressively charging the EL lamp and an adjustable circuit that permits external control of the switching circuit to provide a plurality of different predetermined numbers of the current pulses to the EL lamp is disclosed.