US2030420A - Electric arc discharge tube - Google Patents
Electric arc discharge tube Download PDFInfo
- 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
Links
- 238000010891 electric arc Methods 0.000 title description 3
- 239000000463 material Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 6
- 239000010406 cathode material Substances 0.000 description 5
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 4
- 229910052753 mercury Inorganic materials 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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.
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Discharge Lamp (AREA)
Description
Feb. 11, 1936.
G. ZECHER ELECTRIC ARC DISCHARGE TUBE Filed Oct. 28, 1930 I a 6 Z 2 h T I a m 7 e 5 Jase 772 62/572 56% 4 Patented Feb. 11, 1936 UNITED STATES ELECTRIC ARC DISCHARGE TUBE Gustav Zecher, Eindhoven, Netherlands, assignor, by mesne assignments, to General Electric Company, a corporation of New York Application October 28, 1930, Serial No. 491,769 In the Netherlands January 9, 1930 6 Claims.
layer of disintegrating particles of materialformed on the wall renders difiicult the issue of the rays to be emitted and causes a considerable decrease in efi'iciency of the discharge tubes.
The invention has for its object to obviate these difficulties.
For this purpose, an electric arc discharge tube according to the invention 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.
40 In order that the invention may be clearly understood and readily carried into effect one form of discharge tubes according to the invention will be described with reference to the accompanying drawing.
' 45 The electric discharge tube shown in thefigure coated with intensely emitting substances, for example thorium or oxides of alkaline earth metals. Lateral to the path of the discharge formed between the cathode and the anodes is 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. In addition to the mercury vapour 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.
During the operation of the discharge tube illustrated an arc discharge is struck between the incandescent cathode and the anodes which causes particles of material to disintegrate from the cathode, said particles being retained by the grid-shaped member arranged laterally of the path of discharge, since the grid-shaped member 5, 6, due to its electrical connection with cathode 3, is negatively charged to attract the positively charged particles of disintegrated cathode material. Thus, not only the part of the tube wall Which, viewed from the incandescent cathode, is situated behind the grid-shaped member but also the remaining part of the tube wall remains free from precipitate so that the transparency of the wall to the ultra-violet rays generated in the tube is practically not decreased during the operation of the tube.
Obviously, it is not necessary that 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.
What I claim is:
1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
GUSTAV ZECHER.
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 (en) |
DE (1) | DE620832C (en) |
FR (1) | FR706799A (en) |
GB (1) | GB354141A (en) |
NL (1) | NL31927C (en) |
Cited By (1)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE968579C (en) * | 1941-09-02 | 1958-03-06 | Felix Mueller Dr Ing | High pressure electric discharge tubes for lighting and radiation purposes |
-
0
- NL NL31927D patent/NL31927C/xx active
-
1930
- 1930-10-28 US US491769A patent/US2030420A/en not_active Expired - Lifetime
- 1930-11-28 GB GB35873/30A patent/GB354141A/en not_active Expired
- 1930-11-29 DE DE1930620832D patent/DE620832C/en not_active Expired
- 1930-12-01 FR FR706799D patent/FR706799A/en not_active Expired
Cited By (1)
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 (en) | 1931-06-29 |
DE620832C (en) | 1935-10-28 |
NL31927C (en) |
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