GB343053A - Improvements in luminous electric discharge tubes - Google Patents

Improvements in luminous electric discharge tubes

Info

Publication number
GB343053A
GB343053A GB33953/29A GB3395329A GB343053A GB 343053 A GB343053 A GB 343053A GB 33953/29 A GB33953/29 A GB 33953/29A GB 3395329 A GB3395329 A GB 3395329A GB 343053 A GB343053 A GB 343053A
Authority
GB
United Kingdom
Prior art keywords
discharge lamp
pressure
vapour
temperature
sodium
Prior art date
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
GB33953/29A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Publication of GB343053A publication Critical patent/GB343053A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J61/28—Means for producing, introducing, or replenishing gas or vapour during operation of the lamp

Landscapes

  • Discharge Lamp (AREA)

Abstract

343,053. Metallic-vapour lamps. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London.-(Assignees of Patent-Treuhand-Ges. f³r Electrische Gliihlampen; 11, Ehrenbergstrasse, Berlin.) Nov. 7, 1929, No. 33953. Convention date, July 12. Drawings to Specification. [Class 39 (i).] In a glow-discharge lamp having a filling of one or more metallic vapours and preferably also a gas, such as a rare gas, to facilitate starting, the pressure is maintained constant and independent of current and voltage variations by the provision of a side tube which contains the vaporizable metal and is kept, during discharge, at a temperature below that of the discharge lamp, but equal to that at which the metal has the desired vapour pressure. In one example, the filling consists of argon or helium and sodium vapour at a pressure of 0À1 to 0À2 mm. Sodium is situated in an iron container located at the end of the side tube which is heated by an electric-heater winding to a temperature of 250-300‹ C. The temperature of the glass wall of the discharge lamp is 350-400‹ C.
GB33953/29A 1929-07-12 1929-11-07 Improvements in luminous electric discharge tubes Expired GB343053A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE343053X 1929-07-12

Publications (1)

Publication Number Publication Date
GB343053A true GB343053A (en) 1931-02-09

Family

ID=6243432

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33953/29A Expired GB343053A (en) 1929-07-12 1929-11-07 Improvements in luminous electric discharge tubes

Country Status (1)

Country Link
GB (1) GB343053A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1056742B (en) * 1956-01-13 1959-05-06 British Thomson Houston Co Ltd Electric sodium vapor discharge lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1056742B (en) * 1956-01-13 1959-05-06 British Thomson Houston Co Ltd Electric sodium vapor discharge lamp

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