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. 24, 1996
Filed:
Sep. 23, 1994
Applicant:
Inventor:
Mark S Thomas, Fremont, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21L / ; H02J / ;
U.S. Cl.
CPC ...
320 25 ; 320-2 ; 320 48 ; 361 82 ; 362183 ;
Abstract
Rechargeable battery packs for table lighting each contain a 3-element phono jack in their base for engaging a battery recharger phono plug the insertion of which opens the lamp circuit. If a phono plug has short circuited elements, its insertion into a battery pack causes a short circuit of the battery resulting in damage or destruction of the pack. This is prevented by inserting a diode in the circuit to permit current flow in one direction. Also disclosed is a fault locator for locating a shorted plug of many plugs on a charger board.