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:
Jan. 07, 1992
Filed:
Oct. 11, 1990
Applicant:
Inventors:
Assignee:
Trilux-Lenze GmbH & Co. K.G., Arnsberg, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315324 ; 315153 ; 315154 ; 315320 ; 315322 ;
Abstract
A device which enables a plurality of discharge lamps that are connected to a common ballast to be turned on and off separately via external switches. The operation circuit of the ballast is connected to the external switches through decouplers. The operation circuit may be supplied with voltage via any of the decouplers. A detector detects which of the switches has been closed and closes a logic member in the lamp circuit of the discharge lamp concerned. Consequently, the only lamp circuits that are closed are those in which the detectors have responded.