GB471321A - Improvements in or relating to devices comprising artificially-cooled high-pressure mercury-vapour discharge tubes - Google Patents

Improvements in or relating to devices comprising artificially-cooled high-pressure mercury-vapour discharge tubes

Info

Publication number
GB471321A
GB471321A GB14440/37A GB1444037A GB471321A GB 471321 A GB471321 A GB 471321A GB 14440/37 A GB14440/37 A GB 14440/37A GB 1444037 A GB1444037 A GB 1444037A GB 471321 A GB471321 A GB 471321A
Authority
GB
United Kingdom
Prior art keywords
tube
mercury
discharge path
artificially
cooled high
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
GB14440/37A
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 GB471321A publication Critical patent/GB471321A/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
    • H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/84—Lamps with discharge constricted by high pressure
    • H01J61/86—Lamps with discharge constricted by high pressure with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

471,321. Mercury vapour lamps. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. May 24, 1937, No. 14440. Convention date, May 27, 1936. [Class 39 (i)] An artificially-cooled high-pressure mercuryvapour discharge lamp supplied through series impedance is so dimensioned and the impedance and supply voltage so chosen that the load per unit length of tube exceeds 400 watts per cm., the current exceeds two amperes, the voltage drop per unit length of the discharge path is less than 300 volts per centimetre and the mercury-vapour pressure during use is above 10 atmospheres ; preferably also the current in amperes is between À05 Gd/175 and 2Gd/175, where G is the voltage drop per centimetre of discharge path and d the internal diameter of the tube in mm. ; this arrangement is stated to yield a more yellow light and a wider luminous discharge path than the ordinary forms. The Figure shows such a tube 1 with an external diameter of 7À8 mm. and an internal diamter of 5 mm., enclosed in a casing 5 through which water can be passed. The ends of the tube are constructed as shown, and contain mercury from which the ends of the tungsten leads 2, 3 project slightly, being 1 cm. apart. The tube contains argon at a pressure under ordinary temperature of 40 mm. of mercury. Several numerical examples are given.
GB14440/37A 1936-05-27 1937-05-24 Improvements in or relating to devices comprising artificially-cooled high-pressure mercury-vapour discharge tubes Expired GB471321A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE471321X 1936-05-27

Publications (1)

Publication Number Publication Date
GB471321A true GB471321A (en) 1937-09-01

Family

ID=6541257

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14440/37A Expired GB471321A (en) 1936-05-27 1937-05-24 Improvements in or relating to devices comprising artificially-cooled high-pressure mercury-vapour discharge tubes

Country Status (2)

Country Link
FR (1) FR822212A (en)
GB (1) GB471321A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740922C (en) * 1939-03-21 1943-10-30 Patra Patent Treuhand Arrangement for operating a water-cooled high-pressure mercury discharge lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740922C (en) * 1939-03-21 1943-10-30 Patra Patent Treuhand Arrangement for operating a water-cooled high-pressure mercury discharge lamp

Also Published As

Publication number Publication date
FR822212A (en) 1937-12-23

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