US1961750A - Gaseous electric discharge device - Google Patents

Gaseous electric discharge device Download PDF

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Publication number
US1961750A
US1961750A US702590A US70259033A US1961750A US 1961750 A US1961750 A US 1961750A US 702590 A US702590 A US 702590A US 70259033 A US70259033 A US 70259033A US 1961750 A US1961750 A US 1961750A
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US
United States
Prior art keywords
lamp
electric discharge
sodium
mercury
container
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
Application number
US702590A
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English (en)
Inventor
Ewest Hans
Gaidies Georg
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
Original Assignee
General Electric Co
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 filed Critical General Electric Co
Application granted granted Critical
Publication of US1961750A publication Critical patent/US1961750A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—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
    • H01J61/22—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent vapour of an alkali metal

Definitions

  • GASEOUS ELECTRIC DISCHARGE DEVICE Filed Dec. 15, "1933 INVENTORS latented June 5, 1934- PATENT OFFICE 1,961,150 I GASEOUS ELECTRIC DISCHARGE DEVICE Hans Ewest, Berlin-[dchterfelde-Ost, and Georg Gaidies, Berlin-Pankow, Germany, assignors to General Electric Company, a corporation of New York Application DecemberlS, 1933, Serial No. 702,590 I lin Germany December 31, 1932' 3 Claims.
  • the present invention relates to gaseous electric discharge devices generally and more particularly the invention relates to such devices useful as light sources in television work or the like.
  • Sodium lamps having thermionic electrodes and a gas filling are useful in television work because of the high efliciency of such lamps and the high intensity of the light emitted thereby.
  • sodium lamp devices do not respond instantaneously to the oscillations of the current supply of the lamp which causes a blurring of the picture reproduced by the television apparatus.
  • the object of the present invention is to pro- 15 cute a lamp which responds instantaneously to the oscillations of the current supply thereof. Still further objects and advantages attachingto the device and to its use and operation will'be apparent to those-skilled in the art from the following. particular description.
  • the addition of a small amount of mercury, up to about to the sodium in a rare gas filled sodium lamp having ther- M mionic electrodes makes such lamps instantaneously responsive to the oscillations of the current supp y of the lamp.
  • the quantity of mercury in the lamp be such that substantially all the mercury is in a vaporous condition at the operating temperature of the lamp. Where the operating temperature of the lamp is 400 C. or higher the mercury can be 1% or less of the sodium. For operating temperatures of approximately 300 C. an addition of 4 to 5% of mercury to the sodium is desirable.
  • the quantity of mercury be such that the sodium spectrum predominates in the spectrum of the light emitted by the lamp for under these conditions the high efiiciency and high intensity light emission characteris- 49 tic or sodium lamps are retained.
  • gaseous electric discharge device comprises a container 1 having thermionic electrodes 2' and 3 sealed therein.
  • Said electrodes 2 and 3-c0nsist of a r'odot electronemitting material, such as barium oxide, ended by a filamentary metal Referring to the drawing the new and novel heating coil, such as a tungsten filament.
  • Said container 1 has a gaseous atmosphere therein comprising a starting gas, such as argon or neon, ora mixture of such gases; a diflicultly vaporizable material, such as sodium, indicated at 4, and
  • rial is in a vaporous condition during the operation of the lamp and that the mercury should not be in excess of about 10% of the sodium in any case in order that the lamp retain the high emciency and intense light emission characteristics oi a sodium lamp.
  • the container 1 is maintained at the high temperature required for an effective vapor pressure of the diflicultly vaporizable material during the operation of the device by the high current density discharge therein made possible by the use of thermionic electrodes 2 and 3.
  • the container 1 is provided with a heat conservator to assist in maintaining said container 1 at a high temperature during the operation of the device.
  • a suitable heat conservator is a double walled, evacuated jacket, or a single walled jacket having a gas of poor heat conductivity therein enclosing said container 1.
  • the container 1 has baflles interposed between the electrodes 2 and 3 and the stem parts.-
  • An electric discharge device comprising a container, electrodes sealed therein, a gaseous atmospheretherein comprising a starting gas, a dimcultly vaporizable material and mercury, the
  • An electric discharge device comprising a container, electrodes sealed therein, a gaseous atmosphere therein comprising a starting gas, sodium and mercury, the mercury being approximately 1 to 10% of the sodium.

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  • Discharge Lamps And Accessories Thereof (AREA)
US702590A 1932-12-31 1933-12-15 Gaseous electric discharge device Expired - Lifetime US1961750A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1961750X 1932-12-31

Publications (1)

Publication Number Publication Date
US1961750A true US1961750A (en) 1934-06-05

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ID=7793038

Family Applications (1)

Application Number Title Priority Date Filing Date
US702590A Expired - Lifetime US1961750A (en) 1932-12-31 1933-12-15 Gaseous electric discharge device

Country Status (3)

Country Link
US (1) US1961750A (enrdf_load_stackoverflow)
BE (1) BE397776A (enrdf_load_stackoverflow)
NL (1) NL37467C (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2615140A (en) * 1948-09-28 1952-10-21 Hartford Nat Bank & Trust Co Electric discharge tube containing an alkaline metal
US3219869A (en) * 1963-07-01 1965-11-23 Gen Electric Cesium vapor discharge lamp
US3439209A (en) * 1965-08-28 1969-04-15 Philips Corp Positive column gas discharge lamp employing an alloy of two metals with impedance-free terminal connections

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2615140A (en) * 1948-09-28 1952-10-21 Hartford Nat Bank & Trust Co Electric discharge tube containing an alkaline metal
US3219869A (en) * 1963-07-01 1965-11-23 Gen Electric Cesium vapor discharge lamp
US3439209A (en) * 1965-08-28 1969-04-15 Philips Corp Positive column gas discharge lamp employing an alloy of two metals with impedance-free terminal connections

Also Published As

Publication number Publication date
BE397776A (enrdf_load_stackoverflow)
NL37467C (enrdf_load_stackoverflow)

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