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. 23, 1988
Filed:
Mar. 16, 1987
William L Berry, Winchester, KY (US);
Robert S Coney, Winchester, KY (US);
Stephen P Senft, Lexington, KY (US);
GTE Products Corporation, Danvers, MA (US);
Abstract
An improved electric lamp including an envelope having a sealed end portion, a coiled tungsten filament structure within the envelope, a pair of tungsten lead-in conductors sealed within the envelope and coupled to the filament structure, a first insulative (e.g., quartz) bridge disposed within the envelope between the filament and the envelope's sealed end, and a pair of support wires which also extend within the envelope adjacent the lead-in conductors respectively, to provide support for the contained filament structure. The improvement comprises reinforcement means in the form of a pair of platinum-clad molybdenum wire members each having a smaller diameter than that of the lead-in conductors and support wires, each of these wire members being welded to a respective pair of said conductor and support wire elements at a location between the lower bridge and sealed end. The wire members may be of curvilinear (e.g. U-shaped) configuration or of straight configuration, or a combination of both.