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. 02, 1986
Filed:
Feb. 23, 1983
Applicant:
Inventor:
Denes Vida, Budapest, HU;
Assignee:
Egyesult Izzolempa os Villamossagi Rt., Budapest, HU;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
313571 ; 313642 ;
Abstract
A high-pressure sodium vapor lamp, comprising a hermetically closed tube made of a translucent material of high thermal resistivity as alumina, at least two electrodes arranged in the tube, is filled with noble gas particularly xenon and with vapors of sodium and mercury and/or cadmium under pressure of saturated vapors at the temperature of operating. The quantity of the vapors of mercury and/or cadmium is in the range from 0.5 to 5.0 micromol for each centimeter of length of the discharge arc initiated between the electrodes. The high-pressure sodium lamp with the mentioned quantity of additives is assured a long lifetime of operation.