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:
Dec. 11, 1979
Filed:
Jan. 16, 1978
Applicant:
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; C03C / ;
U.S. Cl.
CPC ...
316 19 ; 65 5 / ; 316 20 ;
Abstract
To permit the use of hard glass rather than silica or quartz glass, a bulb of hard glass is drawn from a length of hard glass tubing, the exhaust tube being molded on adjacent the rounded-off bulb. A mount assembly composed of filaments and two or more lead-in wires is pinch-sealed into the bulb such that pre-oxidized portions of the lead-in wires come to lie within the pinch seal. The pinch seal is rendered vacuum-tight and shaped in separate steps including repeated heating to fuse the wires to the glass and to shape the pinch seal. Subsequent to filling with inert gas, the lamp manufacture is terminated by tipping off the exhaust tube.