Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB17128/21A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbHfiledCriticalPatent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of GB165406ApublicationCriticalpatent/GB165406A/en
H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
H01J9/38—Exhausting, degassing, filling, or cleaning vessels
Landscapes
Engineering & Computer Science
(AREA)
Manufacturing & Machinery
(AREA)
Glass Compositions
(AREA)
Abstract
165,406. Patent-Treuhand-Ges. f³r Elektrische Gl³hlampen. June 22, 1920, [Convention date]. Welding.-In evacuating and sealing-off electric lamp and other glass bulbs according to the processes described in Specifications 101,621 and 138,639, a material such as an alkali salt or a lead compound is applied to the nipple of each bulb, either as a dry powder or in solution, which melts with the glass and lowers its melting point.
GB17128/21A1920-06-221921-06-22Improvements in or relating to the evacuation of electric lamp bulbs or the like
ExpiredGB165406A
(en)