GB913468A - Improvements in or relating to sodium vapour electric discharge lamps - Google Patents

Improvements in or relating to sodium vapour electric discharge lamps

Info

Publication number
GB913468A
GB913468A GB848760A GB848760A GB913468A GB 913468 A GB913468 A GB 913468A GB 848760 A GB848760 A GB 848760A GB 848760 A GB848760 A GB 848760A GB 913468 A GB913468 A GB 913468A
Authority
GB
United Kingdom
Prior art keywords
outer jacket
envelope
electrodes
discharge
march
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
GB848760A
Inventor
Evan Herbert Nelson
Sydney Alfred Richard Ridgen
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
Priority to GB848760A priority Critical patent/GB913468A/en
Publication of GB913468A publication Critical patent/GB913468A/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
    • H01J61/26—Means for absorbing or adsorbing gas, e.g. by gettering; Means for preventing blackening of the envelope

Abstract

913,468. Discharge lamps. GENERAL ELECTRIC CO. Ltd. March 1, 1961 [March 10, 1960], No. 8487/60. Class 39 (1). A low-pressure sodium vapour-rare gasdischarge lamp having the discharge envelope 1 sealed within an evacuated outer jacket 7 has within the outer jacket a pair of auxiliary electrodes 17, 18, each connected to one of the lead-in conductors 9, 8 to the main electrodes 3 for producing at least a partial ionization of any residual gas present within the outer jacket in the region of the electrodes. The auxiliary electrode 17 can be a length of 0.07 mm. diameter tungsten wire with a layer of electron-emissive material and the auxiliary electrode 18 can be a nickel gauze cylinder of 2 cms. diameter surrounding the electrode 17. The envelope 1 can be of straight or U-shape surrounded by a sleeve of transparent heatinsulating material or by a sleeve 6 on each limb as described in Specification 801,482. A getter element 15 of the barium-aluminium type is mounted on a wire 16 within the outer jacket 7 and can be eddy-current heated to form a layer of getter material on the wall of the jacket. The rare gas part of the filling can consist of neon with about 0.75% argon at a total pressure of 10 mms. The discharge envelope 2 is supported within the outer jacket 7 by a mica disc 14 and a spring clip device on the end 19 of the discharge envelope.
GB848760A 1960-03-10 1960-03-10 Improvements in or relating to sodium vapour electric discharge lamps Expired GB913468A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB848760A GB913468A (en) 1960-03-10 1960-03-10 Improvements in or relating to sodium vapour electric discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB848760A GB913468A (en) 1960-03-10 1960-03-10 Improvements in or relating to sodium vapour electric discharge lamps

Publications (1)

Publication Number Publication Date
GB913468A true GB913468A (en) 1962-12-19

Family

ID=9853400

Family Applications (1)

Application Number Title Priority Date Filing Date
GB848760A Expired GB913468A (en) 1960-03-10 1960-03-10 Improvements in or relating to sodium vapour electric discharge lamps

Country Status (1)

Country Link
GB (1) GB913468A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0026521A1 (en) * 1979-09-28 1981-04-08 Koninklijke Philips Electronics N.V. Low-pressure metal vapour discharge lamp
FR2544915A1 (en) * 1983-04-25 1984-10-26 Philips Nv DISCHARGE LAMP IN LOW PRESSURE ALKALINE METAL STEAM

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0026521A1 (en) * 1979-09-28 1981-04-08 Koninklijke Philips Electronics N.V. Low-pressure metal vapour discharge lamp
FR2544915A1 (en) * 1983-04-25 1984-10-26 Philips Nv DISCHARGE LAMP IN LOW PRESSURE ALKALINE METAL STEAM

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