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:
Dec. 13, 1977
Filed:
Jan. 02, 1976
Applicant:
Inventors:
Keith Karl Klett, Danville, IL (US);
Robert Philbrick Alley, Danville, IL (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J / ;
U.S. Cl.
CPC ...
307 64 ; 307 66 ; 307326 ; 363 56 ;
Abstract
An emergency lighting system includes a switching transistor inverter circuit for starting and operating a fluorescent lamp from a battery upon failure of line voltage. A lockout arrangement serves to shut down inverter operation should the lamp be removed from its fixture. Included is an interlock in the lamp fixture and circuitry responsive to an open condition at the interlock to ground the input to a system controller inhibit function thereby to effect removal of battery power from the inverter circuit.