GB447534A - Improvements in electric discharge tubes - Google Patents

Improvements in electric discharge tubes

Info

Publication number
GB447534A
GB447534A GB34788/35A GB3478835A GB447534A GB 447534 A GB447534 A GB 447534A GB 34788/35 A GB34788/35 A GB 34788/35A GB 3478835 A GB3478835 A GB 3478835A GB 447534 A GB447534 A GB 447534A
Authority
GB
United Kingdom
Prior art keywords
envelope
planes
tube
discharge
cathode
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
GB34788/35A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB447534A publication Critical patent/GB447534A/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
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/56—One or more circuit elements structurally associated with the lamp

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

447,534. Discharge apparatus. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. Dec. 14, 1935, No. 34788. Convention date, Jan. 11. [Class 39 (i)] An electric discharge tube is surrounded by at least one envelope and is elastically supported from the envelope by means of helical springs whose axes extend radially or substantially radially. Preferably, at least two points of support are provided in each of at least two transverse planes. In the form shown, a lamp 1 is supported within an outer envelope 2 by three helical springs 14 in each of two transverse planes, the points of support in the two planes having a mutual angular displacement with respect to the lamp axis. Projections 12, 13 on the tube 1, with additional or alternative projections on the envelope 2, may be provided to locate the springs 14. The cathodes 7, 8 are helices coated with emissive material and heated by the discharge; directly or indirectly heated cathodes may also be employed. An auxiliary electrode 10 situated near one cathode is connected through a high resistance to the other cathode. A filling of rare gas and mercury may give a high pressure mercury vapour discharge in the tube 1, and the space between the envelopes 1 and 2 may be exhausted or filled with inert gas. For longer tubes, more than two cross-sectional planes may contain supporting members.
GB34788/35A 1935-01-11 1935-12-14 Improvements in electric discharge tubes Expired GB447534A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE447534X 1935-01-11

Publications (1)

Publication Number Publication Date
GB447534A true GB447534A (en) 1936-05-20

Family

ID=6538019

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34788/35A Expired GB447534A (en) 1935-01-11 1935-12-14 Improvements in electric discharge tubes

Country Status (3)

Country Link
FR (1) FR799383A (en)
GB (1) GB447534A (en)
NL (1) NL42486C (en)

Also Published As

Publication number Publication date
FR799383A (en) 1936-06-11
NL42486C (en)

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