US2030420A - Electric arc discharge tube - Google Patents

Electric arc discharge tube Download PDF

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Publication number
US2030420A
US2030420A US491769A US49176930A US2030420A US 2030420 A US2030420 A US 2030420A US 491769 A US491769 A US 491769A US 49176930 A US49176930 A US 49176930A US 2030420 A US2030420 A US 2030420A
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US
United States
Prior art keywords
cathode
container
electrodes
grid
anodes
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
US491769A
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English (en)
Inventor
Zecher Gustav
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 US2030420A publication Critical patent/US2030420A/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
    • H01J61/04—Electrodes; Screens; Shields

Definitions

  • the invention has for its object to obviate these difficulties.
  • an electric arc discharge tube for the emission of rays being filled with gas or vapour or a mixture thereof and comprising an incandescent cathode and one or more anodes contains a grid-shaped member which, without surrounding the path of discharge, is arranged laterally of this path and which is preferably electrically connected to the incandescent cathode. It has been found that this grid-shaped member prevents the wall from being blackened by intercepting and attracting a very great part of the disintegrating material. Thus, not only the part of the wall which, viewed from the path of discharge, is situated behind the grid-shaped member remains free from precipitate but practically no precipitate is found to be formed on the part of the tube wall that is not directly screened by the member. It is to be understood that the grid-shaped member arranged laterally of the path of discharge can not be in alignment with the said path.
  • the electric discharge tube shown in thefigure coated with intensely emitting substances for example thorium or oxides of alkaline earth metals.
  • a grid-shaped member which consists of a frame 5 on which .a 5 wire 6 is wound intothe form of a grid.
  • the frame 5 is secured by means of a supporting wire i to the supporting wire 8 of an incandescent cathode, which wire similarly to a supporting wire 9 serves to supply the incandescent cathode with 0 current.
  • the supporting wires of the anodes by means of which the latter are fixed to the pinch and through which the electric current can be suppliedare designated by ID and I I.
  • the tube shown on the drawing contains a sup- 15 ply of mercury vapour and for this purpose one or more drops of liquid mercury may have been inserted into the discharge tube.
  • the tube contains a supply of gas which may, preferably, be a rare gas, for example argon.
  • the pressure of this gaseous filling may have Various values and is preferably low, for example of the order of several millimeters, or less of mercury pressure.
  • the shape of the grid-shaped member should always be that of the member shown in the figure, but any other suitable shape, for example the shape of gauze, may be used.
  • An electric discharge lamp device comprising a container, a gaseous atmosphere therein, electrodes sealed therein, one of said electrodes being an elongated cathode of disintegratable material, two of said electrodes being plate shaped anodes mounted in parallel positions in said container, said cathode being interposed between said anodes and a grid in said container mounted at right angles to the longitudinal axis of said cathode parallel to the discharge path between said electrodes and interposed between said cathode and a light transmitting part of said container.
  • An electric discharge lamp device comprising a container, a gaseous atmosphere therein, electrodes sealed therein, one of said electrodes being a thermionic cathodeof helical shape and of disintegratable material, two of said electrodes being plate shaped anodes, said anodes being mounted on opposite sides of said cathode and parallel to the axis of said cathode, a grid in said container mounted substantially at right angles to the axis of said cathode and interposed between the cathode and a light transmitting part of said container and along one side only of the discharge path to intercept the particles of light absorbing, disintegrated cathode material.
  • An electric discharge lamp device comprising a container, a gaseous atmosphere therein, electrodes sealed therein, one of said electrodes being a thermionic cathode of helical shape and of disintegratable material, two of said electrodes being plate shaped anodes, said anodes being mounted on opposite sides of said cathode and parallel to the axis of said cathode, a negatively charged grid in said container mounted substantially at right angles to the axis of said cathode interposed between the cathode and a light transmitting part of said container and along one side only of the discharge path to intercept and attract the patricles of light absorbing, disintegrated cathode material.
  • An electric discharge lamp device comprising a container, a gaseous atmosphere therein, electrodes sealed therein, one of said electrodes being a thermionic cathode of helical shape and of disintegratable material, two of said electrodes being plate shaped anodes, said anodes being mounted on opposite sides of said cathode and. parallel to the axis of said cathode, a grid in said container electrically connected to said cathode and mounted substantially at right angles to the axis of said cathode interposed between the cathode and a light transmitting part of said container and along one side only of the discharge path to intercept and attract the particles of light absorbing, disintegrated cathode material.
  • An electric discharge lamp device comprising a container, a gaseous atmosphere therein, electrodes sealed therein, one of said electrodes being a thermionic cathode of helical shape and of disintegratable material, two of said electrodes being plate shaped anodes, said anodes being coextensive with and mounted on opposite sides of said cathode and parallel to the axis of said cathode, a grid in said container mounted substantially at right angles to the axis of said cathode, interposed between the cathode and a light transmitting part of said container and along one side only of the discharge path to intercept the particles of light absorbing, disintegrated cathode material.
  • An ultra-violet generator comprising a container, a gaseous atmosphere therein, electrodes sealed therein, one of said electrodes being an elongated cathode of disintegratable material, two of said electrodes being plate shaped anodes mounted in parallel positions in said container, said cathode being interposed between said anodes .and a grid in said container mounted at right angles to the longitudinal axis of said cathode, parallel to the discharge path between said electrodes and interposed between said cathode and a light transmitting part of said container.

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  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)
US491769A 1930-01-09 1930-10-28 Electric arc discharge tube Expired - Lifetime US2030420A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL354141X 1930-01-09

Publications (1)

Publication Number Publication Date
US2030420A true US2030420A (en) 1936-02-11

Family

ID=19785150

Family Applications (1)

Application Number Title Priority Date Filing Date
US491769A Expired - Lifetime US2030420A (en) 1930-01-09 1930-10-28 Electric arc discharge tube

Country Status (5)

Country Link
US (1) US2030420A (fr)
DE (1) DE620832C (fr)
FR (1) FR706799A (fr)
GB (1) GB354141A (fr)
NL (1) NL31927C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110124035A1 (en) * 2008-08-08 2011-05-26 Broadley-James Corporation Device for exposing a sensor to a cell culture population in a bioreactor vessel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE968579C (de) * 1941-09-02 1958-03-06 Felix Mueller Dr Ing Elektrische Hochdruck-Entladungsroehre fuer Beleuchtungs- und Strahlungszwecke

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110124035A1 (en) * 2008-08-08 2011-05-26 Broadley-James Corporation Device for exposing a sensor to a cell culture population in a bioreactor vessel

Also Published As

Publication number Publication date
GB354141A (en) 1931-08-06
FR706799A (fr) 1931-06-29
DE620832C (de) 1935-10-28
NL31927C (fr)

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