GB431450A - Improvements in or relating to artificially cooled mercury vapour discharge tubes - Google Patents

Improvements in or relating to artificially cooled mercury vapour discharge tubes

Info

Publication number
GB431450A
GB431450A GB619235A GB619235A GB431450A GB 431450 A GB431450 A GB 431450A GB 619235 A GB619235 A GB 619235A GB 619235 A GB619235 A GB 619235A GB 431450 A GB431450 A GB 431450A
Authority
GB
United Kingdom
Prior art keywords
mercury
tube
electrodes
atmospheres
added
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
GB619235A
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 GB431450A publication Critical patent/GB431450A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/32—Seals for leading-in conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/822—High-pressure mercury lamps

Abstract

431,450. Discharge apparatus. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. Feb. 26, 1935, No. 6192. Convention date, Nov. 6, 1934. [Class 39 (i)] An artificially cooled high-pressure mercury - vapour tube has a filling of a gas such as neon and a mercury vapour pressure greater than 6 atmospheres and is furnished with solid incandescent electrodes which protrude only slightly from a quantity of mercury or amalgam whichpartlysurrounds the electrodes. Cadmium or zinc may be added to the mercury in the form of an amalgam. The correct quantity of mercury may be added by furnishing a quantity of mercury in an auxiliary tube, for example, the exhaust tube, and sealing off the end of this tube so as to expel small quantities of mercury into the main tube whilst observing. the electrical characteristics. In one form, the leads 2 are sealed into the quartz bulb 1 by coatings 3 and caps 4 of the glass described in Specification 431,923. Thin tungsten wires 5 are wound on the ends of the tungsten wires 2 and the combined wires are then oxide-coated. Mercury 6 is added until the electrodes 5 protrude about 1.3 mms., and until the seals between the caps 4 and the tube 1 are covered. In a modification for ultraviolet light production, the quartz tube is narrowed adjacent the electrodes. The mercury pressure in operation is between 6 and 32 atmospheres, for example, 20 atmospheres. The invention is applicable to tubes of the kind described in Specification 431,923.
GB619235A 1934-11-06 1935-02-26 Improvements in or relating to artificially cooled mercury vapour discharge tubes Expired GB431450A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN37372D DE711871C (en) 1934-11-06 1934-11-06 Artificially cooled, closed high-pressure mercury vapor discharge tubes serving to emit rays

Publications (1)

Publication Number Publication Date
GB431450A true GB431450A (en) 1935-07-08

Family

ID=33037646

Family Applications (1)

Application Number Title Priority Date Filing Date
GB619235A Expired GB431450A (en) 1934-11-06 1935-02-26 Improvements in or relating to artificially cooled mercury vapour discharge tubes

Country Status (7)

Country Link
AT (1) AT153368B (en)
CH (1) CH187533A (en)
DE (1) DE711871C (en)
DK (1) DK57199C (en)
FR (1) FR786388A (en)
GB (1) GB431450A (en)
NL (1) NL53679C (en)

Cited By (5)

* 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
DE756326C (en) * 1937-02-20 1952-11-17 Ulrich W Doering Electric discharge lamp with basic inert gas filling
US3363133A (en) * 1966-02-28 1968-01-09 Sylvania Electric Prod Electric discharge device having polycrystalline alumina end caps
US4481443A (en) * 1978-05-23 1984-11-06 U.S. Philips Corporation Short-arc discharge lamp
US4581557A (en) * 1979-01-02 1986-04-08 General Electric Company Stabilized high intensity discharge lamp

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE754219C (en) * 1938-04-24 1954-03-15 Quarzlampen G M B H High-pressure metal vapor lamp, in particular high-pressure mercury lamp, with fixed, non-activated heating electrodes
DE875687C (en) * 1938-10-05 1953-05-04 Electricitaets Ges Sanitas M B Arrangement for operating a high-pressure mercury vapor lamp with a basic gas filling, non-activated incandescent cathodes heated by the discharge and an elongated arc
GB2069228B (en) * 1979-01-02 1983-02-23 Gen Electric Stabilised high intensity discharge lamp

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE756326C (en) * 1937-02-20 1952-11-17 Ulrich W Doering Electric discharge lamp with basic inert gas filling
DE740922C (en) * 1939-03-21 1943-10-30 Patra Patent Treuhand Arrangement for operating a water-cooled high-pressure mercury discharge lamp
US3363133A (en) * 1966-02-28 1968-01-09 Sylvania Electric Prod Electric discharge device having polycrystalline alumina end caps
US4481443A (en) * 1978-05-23 1984-11-06 U.S. Philips Corporation Short-arc discharge lamp
US4581557A (en) * 1979-01-02 1986-04-08 General Electric Company Stabilized high intensity discharge lamp

Also Published As

Publication number Publication date
NL53679C (en) 1942-12-15
FR786388A (en) 1935-09-02
DK57199C (en) 1940-01-29
DE711871C (en) 1941-10-08
AT153368B (en) 1938-05-10
CH187533A (en) 1936-11-15

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