GB427293A - Improvements in or relating to electric discharge tubes - Google Patents

Improvements in or relating to electric discharge tubes

Info

Publication number
GB427293A
GB427293A GB32299/34A GB3229934A GB427293A GB 427293 A GB427293 A GB 427293A GB 32299/34 A GB32299/34 A GB 32299/34A GB 3229934 A GB3229934 A GB 3229934A GB 427293 A GB427293 A GB 427293A
Authority
GB
United Kingdom
Prior art keywords
cadmium
mercury
per cent
discharge tubes
weight
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
GB32299/34A
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 GB427293A publication Critical patent/GB427293A/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
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent

Landscapes

  • Discharge Lamp (AREA)

Abstract

427,293. Discharge lamps. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. Nov. 9, 1934, No. 32299. Convention date, Dec. 11, 1933. Drawings to Specification. [Class 39 (i)] In discharge tubes containing mercury and cadmium in such quantities that their vapours are unsaturated during normal operation, the weight of cadmium is 4-15 per cent, preferably 7-10 per cent, that of mercury, so that the light produced does not distort natural colours. Details are specified for a straight alternating- current tube with an incandescent electrode at each end and operating with a constricted high-pressure discharge, the tube containing argon at 5 mms. pressure at room temperatures and the weight of cadmium being 8 per cent that of mercury.
GB32299/34A 1933-12-11 1934-11-09 Improvements in or relating to electric discharge tubes Expired GB427293A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE427293X 1933-12-11

Publications (1)

Publication Number Publication Date
GB427293A true GB427293A (en) 1935-04-18

Family

ID=6477297

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32299/34A Expired GB427293A (en) 1933-12-11 1934-11-09 Improvements in or relating to electric discharge tubes

Country Status (4)

Country Link
BE (1) BE406741A (en)
FR (1) FR782565A (en)
GB (1) GB427293A (en)
NL (1) NL40804C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE911871C (en) * 1937-03-19 1954-05-20 Tobis Tonbild Syndikat G M B H Discharge lamp with gas or vapor filling and side narrowing of the discharge path with screens, screens or similar means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE911871C (en) * 1937-03-19 1954-05-20 Tobis Tonbild Syndikat G M B H Discharge lamp with gas or vapor filling and side narrowing of the discharge path with screens, screens or similar means

Also Published As

Publication number Publication date
FR782565A (en) 1935-06-07
NL40804C (en)
BE406741A (en)

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