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. 21, 1978
Filed:
Aug. 26, 1976
Applicant:
Inventor:
Keith K Klett, Danville, IL (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J / ; H02J / ;
U.S. Cl.
CPC ...
307 66 ; 307 64 ;
Abstract
An emergency lighting system including an inverter for operating a fluorescent lamp from a battery upon failure of the primary AC voltage source. A transformer connected to the AC source is provided with a single secondary winding for providing both current for charging the battery and a voltage proportional to the AC voltage to circuit inhibit means for allowing inverter operation when AC voltage falls below a predetermined level.