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:
May. 15, 2007
Filed:
May. 27, 2005
John G. Konopka, Deer Park, IL (US);
Naveen Yadlapalli, Hoffman Estates, IL (US);
Shashank Bakre, Schaumburg, IL (US);
Himamshu Prasad, Round Lake, IL (US);
John G. Konopka, Deer Park, IL (US);
Naveen Yadlapalli, Hoffman Estates, IL (US);
Shashank Bakre, Schaumburg, IL (US);
Himamshu Prasad, Round Lake, IL (US);
Osram Sylvania, Inc., Danvers, MA (US);
Abstract
A ballast () for powering at least one gas discharge lamp () at two selectable light levels includes a sensing transformer () and a detector circuit (). Detector circuit () provides an output voltage that is dependent on the states of two on-off switches (S,S) interposed between the ballast () and a conventional AC source (). The output voltage of the detector circuit () is used to control the illumination level of the lamp ().