US2272467A - Electric high pressure discharge lamp - Google Patents

Electric high pressure discharge lamp Download PDF

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Publication number
US2272467A
US2272467A US293850A US29385039A US2272467A US 2272467 A US2272467 A US 2272467A US 293850 A US293850 A US 293850A US 29385039 A US29385039 A US 29385039A US 2272467 A US2272467 A US 2272467A
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US
United States
Prior art keywords
lamp
vessel
high pressure
pressure discharge
pressure
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 - Lifetime
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US293850A
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English (en)
Inventor
Kern Josef
Krefft Hermann
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General Electric Co
Original Assignee
General Electric Co
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Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
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Publication of US2272467A publication Critical patent/US2272467A/en
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    • 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

Definitions

  • the object of the invention is, to produce such a high pressure discharge lamp for power inputs of less than 200 watts, which can be operated by ordinary mains voltages and is well suited for general illuminating purposes. At the same time the lamp should not require a complicated cooling arrangement, a such as the known watercooled high pressure capillary lamps.
  • the using of the peak range of the specific power characteristic curve of the are means further, that the relatively small lamp power 01' 40 watts for example on an extremely short arc section is converted into radiation, that is the electrode spacing for a lamp of a certain power is chosen extremely small.
  • the spherical or approximately spherical vessel used in these lamps to be of very small dimensions, less than 15 millimeters and to be consequently much more resistant to pressure, to heat more quickly when the lamp is taken into service, to be produced cheaply from very little material and rendered safe in service.
  • the new high pressure discharge lamp constructed according to the invention for mains voltage operation and small power inputs of less than 200 watts, is thus characterized in that when using an electrode spacing of less than 5 millimeters the inner surface of the spherical or approximately spherical discharge vessel is less than 1 square centimeter for every 25 watts power input of the lamp and, in the case of an operating pressure of more than 50 atmospheres for obtaining a considerably steeper current voltage characteristic curve, the specific power input of the arc exceeds 300 watts per centimeter of the arc length.
  • the spherical discharging vessel I of quartz glass has an internal diameter of only about 6.5 millimeters, that is an internal surface area of about 1.3 square centimeter, so that the specific watt load of the inner surface is about 31 watts per square centimeter, that is considerably more than 25 watts.
  • An improved lamp which is capable of operating without series ballast and comprising the combination of a spherical quartz vessel of internal diameter of about 6.5 millimeters, said vessel containing a fixed gas and mercury in such amount as to be completely vaporized at an op erating pressure on the order of one hundred and thirty atmospheres, solid electrodes projecting inwardly from the wall of the vessel at diametrically opposite points thereof and having their extremities about 2 millimeters apart, and a power source connected to the lamp, said source having a potential of such value that energy is supplied in excess of 25 watts for each square centimeter of surface area of the vessel and also in excess of 300 watts for each centimeter of the length of the discharge between the electrodes, whereby the lamp operates with an inter nal pressure in excess of 50 atmospheres and exhitbits a sharply rising current-voltage character- 1s 1c.

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  • Discharge Lamps And Accessories Thereof (AREA)
US293850A 1938-09-10 1939-09-07 Electric high pressure discharge lamp Expired - Lifetime US2272467A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
US2272467A true US2272467A (en) 1942-02-10

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ID=5809614

Family Applications (1)

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US293850A Expired - Lifetime US2272467A (en) 1938-09-10 1939-09-07 Electric high pressure discharge lamp

Country Status (5)

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

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467687A (en) * 1946-07-08 1949-04-19 Gen Electric High-pressure discharge lamp
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
US2667592A (en) * 1951-01-11 1954-01-26 Hanovia Chemical & Mfg Co Electrode for compact type electrical discharge devices
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
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
US4161672A (en) * 1977-07-05 1979-07-17 General Electric Company High pressure metal vapor discharge lamps of improved efficacy
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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2826733C2 (de) * 1977-07-05 1982-07-29 General Electric Co., Schenectady, N.Y. Hochdruck-Metalldampf-Entladungslampe
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

Cited By (14)

* 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
US2667592A (en) * 1951-01-11 1954-01-26 Hanovia Chemical & Mfg Co Electrode for compact type electrical discharge devices
US2682007A (en) * 1951-01-11 1954-06-22 Hanovia Chemical & Mfg Co Compact type electrical discharge device
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
US4161672A (en) * 1977-07-05 1979-07-17 General Electric Company High pressure metal vapor discharge lamps of improved efficacy
US5083059A (en) * 1990-12-31 1992-01-21 Welch Allyn, Inc. Electrode for metal halide discharge lamp
WO1992012530A1 (en) * 1990-12-31 1992-07-23 Welch Allyn, Inc. Improved 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 (enrdf_load_stackoverflow)
GB518455A (en) 1940-02-27
CH212737A (de) 1940-12-15
FR860095A (fr) 1941-01-06

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