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:
Jun. 24, 1997
Filed:
Jul. 26, 1995
Applicant:
Inventor:
Ram Shalvi, Hong Kong, HK;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315 94 ; 315158 ; 315149 ; 315 48 ; 315D / ; 315D / ;
Abstract
A solar lamp drive circuit is arranged to delay start-up while a current is supplied to the lamp filament to warm up the filament. During operation, the back e.m.f. induced in the lamp is sampled, and, if operating conditions deteriorate, the current to the filament is reapplied automatically and the power supply to the lamp increased.
Shalvi, Ram. (1997). Drive circuit for a solar lamp with automatic electrical control of the (U.S. Patent No. 5642016). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5642016
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