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:
Apr. 06, 1982
Filed:
May. 16, 1980
Rao L Boggavarapu, Monroeville, PA (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
Unitary ballast structure for starting and operating four fluorescent lamps comprising stacked magnetic iron laminations and coils retained thereon to provide two separate inductor means and a transformer means for heating multiple lamp electrode coils. The magnetic structure comprises a core member having a shell-type configuration with two main legs and six coil legs which define five coil-receiving windows. Coils retained on the second and third coil legs each comprise inductor means and occupy the first, second and third windows. An electrode-coil-heating transformer means is retained on the fifth coil leg and occupies the fourth and fifth windows. Each of the laminations which comprise the magnetic structure can have the same configuration which facilitates manufacture. Magnetic coupling between the different electrical components comprising the ballast structure is minimized, while still providing a compact, unitary ballast.