US1648293A - Electric-discharge device - Google Patents

Electric-discharge device Download PDF

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Publication number
US1648293A
US1648293A US604088A US60408822A US1648293A US 1648293 A US1648293 A US 1648293A US 604088 A US604088 A US 604088A US 60408822 A US60408822 A US 60408822A US 1648293 A US1648293 A US 1648293A
Authority
US
United States
Prior art keywords
caesium
electric
discharge device
gas
cathode
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
US604088A
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English (en)
Inventor
Ernest E Charlton
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
Priority to US604088A priority Critical patent/US1648293A/en
Priority to FR575385D priority patent/FR575385A/fr
Priority to GB30132/23A priority patent/GB207816A/en
Application granted granted Critical
Publication of US1648293A publication Critical patent/US1648293A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/20—Selection of substances for gas fillings; Specified operating pressures or temperatures

Definitions

  • the present invention relates to devices containing an ionizable gas, as for example. argon,in which an electric discharge is produced between electrodes one of which preferably operates at incandescence. It is the object of my invention to improve the efficiency and operating characteristics of these devices.
  • the device illustrated comprises. an envelope ,1, consisting of suitable refractory glass, a cathode 2 consisting of tungsten, or
  • the cathode is. shown as constituted by a heavy, coiled filament connected to leading-in conductors 4, 5, sealed as usual into a stem 6, and contacting with a screw base 7, whereby a heating. current may be conveyed to heat of argon, neon, hydrogen, helium or other tenth or a few tenths of one per cent of the total pressure in the-bulb. 1 c
  • the bulb preferably is given a preliminary exhaust by the methods used in exhausting incandescent lamps.
  • Argon or other suitable gas at a pressure of several millimeters to several centimeters then is introduced and a discharge is operated in the bulb to drive gas out of the. anode.
  • This preliminary gas filling is pumped out, the desired quantity of alkali metal is introduced, and another gaseous filling at the desired pressure is admitted.
  • the .exhaust and gas-admitting conriection isindicated as sealed off byfusion at 1 While the desired quantity of caesium may be introduced in-any. convenient way, I prefer to introduce the same from a reaction mixture comprising a reducible compound of the desired metal and a reducing material.
  • caesium may be supplied'from a side tube 12 containing as a'preferable source, a mixture of caesium chloride and an excess of finely divided magnesium- A reaction brought about by heating-the tube 12 evolves caesium.
  • The'rcduced metal first accumulates .in the bulbs 13 and from thence is conveyed by the connecting tube .14 into.
  • the tube 12 may remain attached to the main contamer. during the operation of the device, or
  • the pressure of the alkali metal is of the order of magnitude of a micron.
  • reaction mixture may be applied to a convenient interior part of the device, as for example, to sdme part lot the cathode or anode, thus dispensing with a side chamber.
  • the alkali metal then is evolved by is applied. 7
  • An electric discharge device comprising a container, a refractory cathode, an anode, a gaseous filling therein at a substantial pressure sufiicientlyhigh to permit operation of I 'a thermionic discharge with a voltage between said electrodes below the ionization voltage of said gas and a suflicient quantity of alkali'metal having an atomic weight greater than that of potassium in said container to reduce the operation voltage to a value lower than the value characteristic of the gaseous filling under the given conditions.
  • An electric rectifier comprising a container, a thermionic cathode, an anode adapted to operate at a substantially lower temperature than said cathode, a gas filling at a pressure of the order of magnitude of several centimeters of mercury, and a quantity of alkali metal having an atomic weight greater thanthat of potassium in said container, said device being constructed to operate at a temperature at which caesium has a vapor pressure of the order of about one micron of mercury.
  • An electric rectifier comprising a container, a thermionic cathode, an anode of solid conducting material, an atmosphere of argon of about five cm. of mercury pressure and a quantity of caesium sutficient to increase the current-carrying capacity and cause the voltage drop in said rectifier, to be about five volts with a thermonic current of about seven amperes.

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  • Discharge Lamp (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
US604088A 1922-11-29 1922-11-29 Electric-discharge device Expired - Lifetime US1648293A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US604088A US1648293A (en) 1922-11-29 1922-11-29 Electric-discharge device
FR575385D FR575385A (fr) 1922-11-29 1923-11-26 Dispositif à décharge électrique
GB30132/23A GB207816A (en) 1922-11-29 1923-11-29 Improvements in and relating to electric discharge devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US604088A US1648293A (en) 1922-11-29 1922-11-29 Electric-discharge device

Publications (1)

Publication Number Publication Date
US1648293A true US1648293A (en) 1927-11-08

Family

ID=24418130

Family Applications (1)

Application Number Title Priority Date Filing Date
US604088A Expired - Lifetime US1648293A (en) 1922-11-29 1922-11-29 Electric-discharge device

Country Status (3)

Country Link
US (1) US1648293A (fr)
FR (1) FR575385A (fr)
GB (1) GB207816A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438181A (en) * 1943-05-27 1948-03-23 Westinghouse Electric Corp Fluorescent and/or cathode glow lamp and method
US20040150346A1 (en) * 2003-01-30 2004-08-05 Kazuhiko Machida Discharge tube

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739389C (de) * 1936-01-26 1943-09-24 Siemens Ag Anordnung zur Verdampfung eines Getterstoffes aus einem von aussen her zu beheizenden, in das Innere eines Entladungsgefaesses muendenden Rohr

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438181A (en) * 1943-05-27 1948-03-23 Westinghouse Electric Corp Fluorescent and/or cathode glow lamp and method
US20040150346A1 (en) * 2003-01-30 2004-08-05 Kazuhiko Machida Discharge tube
US7116049B2 (en) * 2003-01-30 2006-10-03 Shinko Electric Industries Co., Ltd. Discharge tube with a specific amount of hydrogen gas by volume

Also Published As

Publication number Publication date
GB207816A (en) 1925-02-26
FR575385A (fr) 1924-07-29

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