US2152995A - Glow discharge device - Google Patents

Glow discharge device Download PDF

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Publication number
US2152995A
US2152995A US124854A US12485437A US2152995A US 2152995 A US2152995 A US 2152995A US 124854 A US124854 A US 124854A US 12485437 A US12485437 A US 12485437A US 2152995 A US2152995 A US 2152995A
Authority
US
United States
Prior art keywords
container
discharge tube
vapor
space
discharge
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
US124854A
Other languages
English (en)
Inventor
Holst Gilles
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 US2152995A publication Critical patent/US2152995A/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
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J61/26—Means for absorbing or adsorbing gas, e.g. by gettering; Means for preventing blackening of the envelope

Definitions

  • discharge tubes such as high-pressure mercury-vapor discharge tubes, are. known which are arranged within a single-walled container and are secured thereto, not permanently, but in such a way that they can be taken apart.
  • the present invention relates to electric dis charge tubes with a gas or vapor filling and which are enclosed in a container secured to the tube in 80 a nonpermanent, removable manner; the invention has the purpose of improving this construction.
  • a material which attracts water is placed in the closed space be- 86 tween the discharge tube and the container. It hasbeen found that in spite of the fact that this space is substantially closed, under certain conditions of the surroundings, such a large quantity of water vapor can penetrate into this space 40 that the ingition of the discharge tube is madedimcult.
  • Sodium-vapor lamps which were placed in a Dewar vessel ignite without trouble in the case of dry weather, while they do not ignite when the same voltage is applied in foggy 46 weather.
  • calcium oxide or calcium chloride for absorbing the water but it is preferable to utilize a material which, at the temperature at which it is u heated during the operation of the discharge tube. 88am liberates the absorbed water vapor. The air in the space between the tube and the container is heated during operation and then creates an excess in pressure. As a result, a part of this air with a part of. the water vapor which is again liberated from the material, is forced to the outside through the removable connection.
  • the material utilized can consist, to advantage, of active carbon or silica gel.
  • the drawing shows two physical embodiments m according. to the invention.
  • Figs. 1 and 2 show a discharge tube which is enclosed by a double-walled container
  • Fig. 3 shows a discharge tube which is surrounded by a single-walled container.
  • l is a U-shaped discharge tube which is provided with a gas filling that contains sodium vapor and which is utilized for the emission of light rays.
  • This discharge tube is provided with a base 2 on which the contacts 3 are located.
  • the discharge tube is surrounded by a double-walled container 4 which is evacuated and which is fastened to the ring 5 consisting of insulating material.
  • This 'ring fits the a base 2 as tightly as possible so that the best posg5 sible. seal is obtained of the air-filled space between the tube and the container 4.
  • the ring 5 and the base 2 are secured together by the screw 6.
  • a tablet or pellet l which consists of highly active carbon and which strongly attracts water vapor. This pellet can b'eplaced on the bottom of the container.
  • Fig. 3 8 shows a high-pressure mercuryvapor discharge tube which, during operation, has a very high mercury-vapor pressure of, for example, atmospheres.
  • the discharge tube is secured to the base ll of insulating material with the aid of the current-supply wires 9 and Ill.
  • the tube is surrounded by a single-walled container l2 to which .the ring It consisting of insulating material is secured. This ring encloses a portion of the base H and is connected thereto by means of the screw it. In the lower 2.
  • c gcsecus discharge device In combination, c gcsecus discharge device,
  • a gaseous pervious container smroundmg said de vice and spaced therefrom means for cbcorbirig water vapor in the space cod for releasing the vapor when heated to operating temperatures said means being positioned between said device and said container to avoid changes in time stcrtinc voltage of said discharge device.
  • ccmbiiicticm cccscous electric dis- charge icmzi device a removable and transparent container therefor, and a quantity or carbon in the spcce between the hump devicc and said e tccccc 4.
  • a gaseous electric discharge iamp device a; removable container thcrefcr, cod a pellet of a. compound containing calcium pos tioned between the lamp device and the com tamer for absorbing water vapor to cvoid changes in the starting voltage of said discharge device.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
US124854A 1936-02-19 1937-02-09 Glow discharge device Expired - Lifetime US2152995A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL465337X 1936-02-19

Publications (1)

Publication Number Publication Date
US2152995A true US2152995A (en) 1939-04-04

Family

ID=19786424

Family Applications (1)

Application Number Title Priority Date Filing Date
US124854A Expired - Lifetime US2152995A (en) 1936-02-19 1937-02-09 Glow discharge device

Country Status (6)

Country Link
US (1) US2152995A (enrdf_load_stackoverflow)
BE (1) BE420072A (enrdf_load_stackoverflow)
DE (1) DE665480C (enrdf_load_stackoverflow)
FR (1) FR818047A (enrdf_load_stackoverflow)
GB (1) GB465337A (enrdf_load_stackoverflow)
NL (1) NL50468C (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2615146A (en) * 1948-02-11 1952-10-21 Cooper Hewitt Electric Co Thermostatic switch
US4401916A (en) * 1979-04-03 1983-08-30 U.S. Philips Corporation High-pressure discharge lamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2615146A (en) * 1948-02-11 1952-10-21 Cooper Hewitt Electric Co Thermostatic switch
US4401916A (en) * 1979-04-03 1983-08-30 U.S. Philips Corporation High-pressure discharge lamp

Also Published As

Publication number Publication date
NL50468C (enrdf_load_stackoverflow)
BE420072A (enrdf_load_stackoverflow)
DE665480C (de) 1938-09-28
GB465337A (en) 1937-05-05
FR818047A (fr) 1937-09-16

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