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:
Aug. 17, 1999
Filed:
Dec. 01, 1997
Applicant:
Inventors:
Wolfgang Robel, Filderstadt-Sielmingen, DE;
Achim Weiss, Oberderdingen, DE;
Helmut Haf, Schwaikheim, DE;
Winfried Hardy Gauch, Magstadt, DE;
Assignee:
Reitter & Schefenacker GmbH & Co. KG, Esslingen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315289 ; 315119 ;
Abstract
A circuit for protecting electrically operated lighting elements used for illumination or signaling has at least one PTC resistor connected serially upstream of the lighting element. In another embodiment, the circuit has a self-regulating current supply connected serially upstream of the lighting element. In yet another embodiment, the circuit has a down convertor connected serially upstream of the lighting element.