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:
Jul. 07, 1992
Filed:
Mar. 21, 1991
Raymond T Fleming, Lexington, KY (US);
GTE Products Corporation, Danvers, MA (US);
Abstract
A method of making a double ended lamp having a tubular envelope, a filament, and button contacts at opposite ends of the lamp is disclosed. By first forming a metallurgical bond between the button contacts, and a lead rods, a high quality bond may be formed that does not cause the lead rod to become embrittled. The button contact and lead rod assembly is then, if not already, incorporated into the filament assembly. The filament assembly is then accurately positioned in a tubular envelope and sealed in place. The lamp may then be finished by filling, coating, insulating, and so on in a standard fashion. The button contact as a result is accurately positioned with respect to the envelope, and is unlikely to separate from the lead because of crimp failure, or embrittled rod fracture.