US2172968A - Electric discharge tube - Google Patents
Electric discharge tube Download PDFInfo
- Publication number
- US2172968A US2172968A US167035A US16703537A US2172968A US 2172968 A US2172968 A US 2172968A US 167035 A US167035 A US 167035A US 16703537 A US16703537 A US 16703537A US 2172968 A US2172968 A US 2172968A
- Authority
- US
- United States
- Prior art keywords
- copper
- electric discharge
- discharge tube
- zirconium
- alloy
- 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
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 16
- 229910052802 copper Inorganic materials 0.000 description 16
- 239000010949 copper Substances 0.000 description 16
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 9
- 229910052726 zirconium Inorganic materials 0.000 description 6
- 229910001093 Zr alloy Inorganic materials 0.000 description 5
- 229910000881 Cu alloy Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XTYUEDCPRIMJNG-UHFFFAOYSA-N copper zirconium Chemical compound [Cu].[Zr] XTYUEDCPRIMJNG-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
- H01J19/28—Non-electron-emitting electrodes; Screens
- H01J19/30—Non-electron-emitting electrodes; Screens characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
- H01J2893/0012—Constructional arrangements
- H01J2893/0019—Chemical composition and manufacture
- H01J2893/002—Chemical composition and manufacture chemical
Definitions
- the present invention relates to an electric discharge tube, in which one of the electrodes or other parts at least partly consist of copper.
- the electrodes or other parts of an electric discharge tube according to the present invention do not consist, at least partly, of normal copper, but the copper used for them has added to it a very small percentage of zirconium.
- the copper used for this purpose preferably contains about 0.1% to 0.3% of zirconium.
- the quantity of gas set free by this material is materially smaller than that of normal copper and is of the order of magnitude of 10% thereof. Furthermore, it has turned out that the composition of the gas is also difierent from that of normal copper, since the material according to the present invention substantially contains hydrogen, whereas normal copper releases large quantities of carbon monoxide.
- an electron 'discharge tube having some electrodes which usually attain rather high temperatures during operation and which may be made of copper zirconium alloy of the invention.
- the tube shown in the drawing is conventional in structure and comprises an evacuated bulb enclosing an indirectly heated cathode consisting of a conventional heater 2 and a cathode sleeve 3 of the copper zirconium alloy of the invention, a conventional grid with side rods 4 and a cooling collar 5 of the same alloy, and an anode 6 which need not be made of the alloy unless it attains unusually high temperature during operation.
- An electric discharge device comprising an evacuated envelope containing an electrode which consists of an alloy of copper and zirconium containing a fraction of one per cent by weight of zirconium and the balance copper.
- An electric discharge device comprising an evacuated envelope enclosing an electrode comprising a metal part which is heated during operation of the device and which consists of an alloy of copper and zirconium containing from 0.1% to 0.3% of zirconium and the balance copper.
- An electric discharge device comprising an evacuated envelope enclosing a grid electrode having a cooling collar consisting of an alloy of copper and zirconium containing from 0.1% to 0.3% of zirconium and the balance copper.
- An electric discharge device comprising an evacuated envelope enclosing an indirectly heated cathode structure comprising a heater and a cathode sleeve consisting of copper alloyed with from 0.1% to 0.3% of zirconium.
Description
l 12, 1939- J. H. DE BOER 2,172,968
ELECTRIC DI SCHARGE TUBE Filed Oct. 2, 1937 CUPROUS ALLOY CON TA/N/NG Z/QCON/UM INVENTOR. JA/v HENDR/K 0E 805R WQw'r ATTORNEY.
UNITED STATES PATENT OFFICE ELECTRIC DISCHARGE TUBE Jan Hendrik de Boer, Eindhoven, Netherlands, as-
signor to N V. Philips Gloeilampenfabrieken, Eindhoven, Netherlands Application October 2, 1937, Serial No. 167,035 In Germany October 5, 1936 4 Claims.
The present invention relates to an electric discharge tube, in which one of the electrodes or other parts at least partly consist of copper.
It is already known to use copper for the supply conductors of electric discharge tubes. Furthermore it has been proposed to make other parts such as the cathode body of indirectly heated cathodes, supporting rods of grids, cooling members or the like at least partly of copper. Copper has the great advantage, more particularly for the last-mentioned application, that the thermal emissivity of this material is comparatively small, whereas the thermal conduction is comparatively high: In many cases, however, the use of normal copper in discharge tubes involves phenomena which, according to experiments made by me, result in considerable quantitles of gas often released by these copper members in the exhausted tube.
To avoid this drawback the electrodes or other parts of an electric discharge tube according to the present invention do not consist, at least partly, of normal copper, but the copper used for them has added to it a very small percentage of zirconium. The copper used for this purpose preferably contains about 0.1% to 0.3% of zirconium.
We have found that the quantity of gas set free by this material is materially smaller than that of normal copper and is of the order of magnitude of 10% thereof. Furthermore, it has turned out that the composition of the gas is also difierent from that of normal copper, since the material according to the present invention substantially contains hydrogen, whereas normal copper releases large quantities of carbon monoxide.
In the accompanying drawing there is shown merely rfor illustration an electron 'discharge tube having some electrodes which usually attain rather high temperatures during operation and which may be made of copper zirconium alloy of the invention. The tube shown in the drawing is conventional in structure and comprises an evacuated bulb enclosing an indirectly heated cathode consisting of a conventional heater 2 and a cathode sleeve 3 of the copper zirconium alloy of the invention, a conventional grid with side rods 4 and a cooling collar 5 of the same alloy, and an anode 6 which need not be made of the alloy unless it attains unusually high temperature during operation.
What I claim is:
1. An electric discharge device comprising an evacuated envelope containing an electrode which consists of an alloy of copper and zirconium containing a fraction of one per cent by weight of zirconium and the balance copper.
2. An electric discharge device comprising an evacuated envelope enclosing an electrode comprising a metal part which is heated during operation of the device and which consists of an alloy of copper and zirconium containing from 0.1% to 0.3% of zirconium and the balance copper.
3. An electric discharge device comprising an evacuated envelope enclosing a grid electrode having a cooling collar consisting of an alloy of copper and zirconium containing from 0.1% to 0.3% of zirconium and the balance copper.
4. An electric discharge device comprising an evacuated envelope enclosing an indirectly heated cathode structure comprising a heater and a cathode sleeve consisting of copper alloyed with from 0.1% to 0.3% of zirconium.
JAN I-IENDRIK DE BOER.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2172968X | 1936-10-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2172968A true US2172968A (en) | 1939-09-12 |
Family
ID=7988530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US167035A Expired - Lifetime US2172968A (en) | 1936-10-05 | 1937-10-02 | Electric discharge tube |
Country Status (1)
Country | Link |
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US (1) | US2172968A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2479846A (en) * | 1943-08-18 | 1949-08-23 | Lalewicz Stanislaw | Gas-filled electric discharge device |
US2496065A (en) * | 1948-01-16 | 1950-01-31 | Sylvania Electric Prod | Electric discharge lamp |
US2749462A (en) * | 1952-05-31 | 1956-06-05 | Gen Electric | High pressure mercury vapor lamp with zirconium getter |
US2842438A (en) * | 1956-08-02 | 1958-07-08 | American Metal Climax Inc | Copper-zirconium alloys |
US2847303A (en) * | 1957-01-04 | 1958-08-12 | Georges Rene Jean Lafeuille | Copper-base alloys |
-
1937
- 1937-10-02 US US167035A patent/US2172968A/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2479846A (en) * | 1943-08-18 | 1949-08-23 | Lalewicz Stanislaw | Gas-filled electric discharge device |
US2496065A (en) * | 1948-01-16 | 1950-01-31 | Sylvania Electric Prod | Electric discharge lamp |
US2749462A (en) * | 1952-05-31 | 1956-06-05 | Gen Electric | High pressure mercury vapor lamp with zirconium getter |
US2842438A (en) * | 1956-08-02 | 1958-07-08 | American Metal Climax Inc | Copper-zirconium alloys |
US2847303A (en) * | 1957-01-04 | 1958-08-12 | Georges Rene Jean Lafeuille | Copper-base alloys |
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