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. 08, 1978
Filed:
Sep. 27, 1976
Eric H Pritchard, London, GB;
Thomas R Passmore, London, GB;
Thorn Electrical Industries Limited, London, GB;
Abstract
An inductor structure for use in a discharge lamp circuit has wound around at least part of its magnetic core first and second conducting foils. The first conducting foil is insulated from the magnetic core. The second conducting foil is interwound with but separated and insulated from the first conducting foil by a first dielectric foil and a second dielectric foil interwound with the conducting foils. The conducting foils have different numbers of turns. The conducting foil with the greater number of turns has all its turns except its excess turns wound oppositely to the turns of the other conducting foil. The structure provides a lower level of harmonic content above main frequency in the lamp and mains current waveforms.