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:
May. 03, 1977
Filed:
Dec. 29, 1975
George L Duggan, Bedford, MA (US);
GTE Sylvania Incorporated, Danvers, MA (US);
Abstract
In assembly of an incandescent lamp with a conventional glass envelope, filament and filament supporting lead wires, a wire, ribbon or like strip of metallic getter material is electrically connected between the lead wires in parallel with the filament. The getter strip is of a metallic material having a vapor pressure greater than one hundredth Torr at its melting point. After assembly electrical current is flashed through the lead wires and getter strip resistively heating the strip to vaporization and dispersing the getter metal in atomic state toward the interior walls and other locations within the lamp envelope. In transit to the walls the atomic metal adds to the gettering action at vaporization. And after flashing, the getter metal is deposited at reactive getter sites distributed throughout the interior of the lamp for continued gettering action during lamp operating life.