GB518455A - Improvements in high-pressure metal-vapour electric discharge lamps - Google Patents

Improvements in high-pressure metal-vapour electric discharge lamps

Info

Publication number
GB518455A
GB518455A GB28477/38A GB2847738A GB518455A GB 518455 A GB518455 A GB 518455A GB 28477/38 A GB28477/38 A GB 28477/38A GB 2847738 A GB2847738 A GB 2847738A GB 518455 A GB518455 A GB 518455A
Authority
GB
United Kingdom
Prior art keywords
watts
envelope
pressure
electrodes
distance
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
GB28477/38A
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
Publication of GB518455A publication Critical patent/GB518455A/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
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • 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

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

518,455. Discharge lamps. GENERAL ELECTRIC CO., Ltd. (Patent-Treuhand-Ges. fur Elecktrische Gluhlampen). Sept. 30, 1938, No. 28477. [Class 39 (i)] An H.P. M.V. lamp is designed to work on a flat or positive characteristic even when the power, W, dissipated is less than 200 watts and there is no forced cooling. In this lamp the distance L between the electrodes is such that W/L is greater than 200 watts/cm. and the interior surface S of the envelope is such that W/S is greater than 25 watts/sq. cm. The pressure of the metal vapour in full operation exceeds 30 atmospheres. A distance L less than 5 mm. is also claimed. In the example illustrated the power W is 80 watts. The internal diameter of the envelope 1 is 6.5 mm. so that S=1.3 sq. cm. and W/S=38 watts/sq. cm. The distance between the electrodes is 2 mm. so that W/L=250 watts/cm. The envelope 1 is filled with argon at 20 mm. (higher pressures up to 400 mm. may be preferable to secure a quick run-up) and contains a globule of mercury 11 exerting a pressure of 130 atm. when all evaporated in full operation. The electrodes are small perforated tungsten canisters filled with thoria and are cooled by touching the envelope. The envelope is supported within a sealed glass bulb 9 filled with gas, e.g. nitrogen at 300 mm. pressure.
GB28477/38A 1938-09-10 1938-09-30 Improvements in high-pressure metal-vapour electric discharge lamps Expired GB518455A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE212737X 1938-09-10

Publications (1)

Publication Number Publication Date
GB518455A true GB518455A (en) 1940-02-27

Family

ID=5809614

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28477/38A Expired GB518455A (en) 1938-09-10 1938-09-30 Improvements in high-pressure metal-vapour electric discharge lamps

Country Status (5)

Country Link
US (1) US2272467A (en)
BE (1) BE440887A (en)
CH (1) CH212737A (en)
FR (1) FR860095A (en)
GB (1) GB518455A (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2469607A (en) * 1943-09-20 1949-05-10 Gen Electric Electric lamp unit
US2545884A (en) * 1946-01-18 1951-03-20 Gen Electric High-pressure mercury vapor electric discharge lamp
US2467687A (en) * 1946-07-08 1949-04-19 Gen Electric High-pressure discharge lamp
US2673944A (en) * 1948-12-23 1954-03-30 Gen Electric Electric discharge lamp
US2682007A (en) * 1951-01-11 1954-06-22 Hanovia Chemical & Mfg Co Compact type electrical discharge device
US2667592A (en) * 1951-01-11 1954-01-26 Hanovia Chemical & Mfg Co Electrode for compact type electrical discharge devices
US2707247A (en) * 1951-06-05 1955-04-26 Hanovia Chemical & Mfg Co Vapor electric discharge lamp
US3662175A (en) * 1969-12-22 1972-05-09 Tuttle Inc Apparatus for generating ultra violet light
US3714493A (en) * 1970-04-06 1973-01-30 Gen Electric Compact metal halide arc lamp containing primarily mercury iodide
US3882346A (en) * 1973-11-05 1975-05-06 Gen Electric Ceramic arc tube mounting structure
DE2826733C2 (en) * 1977-07-05 1982-07-29 General Electric Co., Schenectady, N.Y. High pressure metal halide discharge lamp
US4161672A (en) * 1977-07-05 1979-07-17 General Electric Company High pressure metal vapor discharge lamps of improved efficacy
US4170746A (en) * 1977-12-27 1979-10-09 General Electric Company High frequency operation of miniature metal vapor discharge lamps
US4199701A (en) * 1978-08-10 1980-04-22 General Electric Company Fill gas for miniature high pressure metal vapor arc lamp
US5083059A (en) * 1990-12-31 1992-01-21 Welch Allyn, Inc. Electrode for metal halide discharge lamp
US5253153A (en) * 1992-09-16 1993-10-12 General Electric Company Vehicle headlamp comprising a metal-halide discharge lamp including an inner envelope and a surrounding shroud

Also Published As

Publication number Publication date
BE440887A (en)
CH212737A (en) 1940-12-15
US2272467A (en) 1942-02-10
FR860095A (en) 1941-01-06

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