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. 01, 1989
Filed:
Dec. 29, 1987
Abstract
At least two discharge units (2, 3; 14, 15, 16; 21, 22, 23, 27, 28, 29) are ocated adjacent each other, each of the discharge units preferably including a unitary U-shaped tube having two longitudinal leg portions (2a, 2b; 3a, 3b) extending parallel to each other, and a cross portion (4, 5) connecting the leg portions at the base of the U. The free ends of the U are pinch-sealed and air-tight, and the two discharge units are so positioned relative to each other that the longitudinal leg portions extend parallel to each other, selectively, in a single plane, in parallel planes, or angled with respect to each other; the cross elements are located at adjacent end portions of the respective units. One filament-carrying electrode is sealed into one free end of one leg of one U-shaped tube of one unit, and another filament-carrying electrode is sealed into a free end of one leg of another unit; the units are cross-connected to provide a continuous discharge path, the cross connection being effected adjacent pinch-sealed ends of those legs of the U-shaped tubes which do not have filament-carrying electrodes sealed therein. To facilitate lamp starting, an auxiliary electrode (116) is pinch-sealed adjacent the cross connection, and coupled by an impedance (117) to the 'hot' filament-carrying electrode.