US2491234A - Cold cathode discharge tube - Google Patents
Cold cathode discharge tube Download PDFInfo
- Publication number
- US2491234A US2491234A US728014A US72801447A US2491234A US 2491234 A US2491234 A US 2491234A US 728014 A US728014 A US 728014A US 72801447 A US72801447 A US 72801447A US 2491234 A US2491234 A US 2491234A
- Authority
- US
- United States
- Prior art keywords
- grid
- cathode
- electrode
- discharge tube
- cold 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
Links
- 238000010276 construction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- KOPBYBDAPCDYFK-UHFFFAOYSA-N caesium oxide Chemical compound [O-2].[Cs+].[Cs+] KOPBYBDAPCDYFK-UHFFFAOYSA-N 0.000 description 1
- 229910001942 caesium oxide Inorganic materials 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011160 research Methods 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
- H01J19/82—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/30—Cold cathodes, e.g. field-emissive cathode
- H01J1/312—Cold cathodes, e.g. field-emissive cathode having an electric field perpendicular to the surface, e.g. tunnel-effect cathodes of metal-insulator-metal [MIM] type
Definitions
- This invention relates to a device having an electrode system which comprises an electronemitting electrode, from which the electrons emerge by iield emission.
- an electrode system which comprises an electronemitting electrode, from which the electrons emerge by iield emission.
- This is to be understood to mean an electrode which consists of at least one conducting substratum and a very thin insulating layer, and with which a high eld strength occurs in this insulating lm if a potential diierence is set up between this electrode and another conducting electrode energized to function as a suction electrode. Therefore, such first-mentioned electrode supplies electrons in the cold state.
- An example of such an electrode has been described by Malter in Physical Review 1936, vol. 49, page 478. In that case the said electrode is not used as a primary but as a secondary cathode.
- An electrode of the kind described here may be built up in various ways, but it is necessary that it comprises a thin insulating layer in which a high field strength occurs.
- a device which is characterized in that it comprises a cathode emitting by field-emission, and in addition a plurality of grids and an anode, with the second grid, viewed from the cathode to the anode, or with a grid nearer to the anode, functioning as a control grid, and on the cathode side of the control grid there being a grid to which is applied a voltage which is positive with respect to the cathode.
- control grid in a definite voltage range of this grid, has a negative anode-current control-grid voltage characteristic i. e. that an increase in grid Voltage involves a decrease in anode current and conversely.
- the second grid viewed from the cathode to the anode, functions as a control grid, and a positive voltage is applied to the first grid.
- This voltage may, for instance, have a value between and 250 volts. It is possible, however, that the control grid constitutes one of the next grids, in which case a preceding grid has a positive voltage. It is pointed out in this respect that the grids may be Wound at will and that it is advisable not to wind these grids in such a manner that the turns are located one behind the other.
- Figure 1 is a side elevational view of an electron discharge tube with a portion of the envelope broken away to show the relative location of the electrodes within the tube;
- Figure 2 is a schematic sectional view of the electrode arrangement and showing particularly the construction of the cathode.
- the reference numeral I denotes a nickel wire which functions as a conducting substratum for the cathode.
- This wire carries an insulating layer 2, for example, of magnesium oxide, which has a thickness of some few microns and is covered with a material 3. for instance caesium oxide, having a high electron-emitting capacity.
- the cathode thus designed and emitting by eld emission is surrounded by two grids 4, 5 and an anode 6. To the grid 4 is applied a direct voltage of 200; the grid 5 acts as a control grid and to the anode is applied a voltage of 250.
- An electron discharge tube comprising a cathode having a thin insulating layer for establishing a localized high field strength under the iniiuence of an impressed field, the cathode being adapted to be operated as a cold electrode and to cause secondary emission at the 'cathode and thereby establish a negative impedance effect in the tube.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Nanotechnology (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Cold Cathode And The Manufacture (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE654943X | 1944-11-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2491234A true US2491234A (en) | 1949-12-13 |
Family
ID=3876905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US728014A Expired - Lifetime US2491234A (en) | 1944-11-03 | 1947-02-12 | Cold cathode discharge tube |
Country Status (4)
Country | Link |
---|---|
US (1) | US2491234A (de) |
DE (1) | DE823012C (de) |
GB (1) | GB654943A (de) |
NL (1) | NL65336C (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2708726A (en) * | 1948-12-04 | 1955-05-17 | Emi Ltd | Electron discharge device employing secondary electron emission and method of making same |
US3064178A (en) * | 1958-05-19 | 1962-11-13 | Union Carbide Corp | Inert-gas arc rectifier |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1750058A (en) * | 1924-01-23 | 1930-03-11 | Radio Patents Corp | Discharge tube containing auxiliary electrodes |
US1779550A (en) * | 1925-08-01 | 1930-10-28 | Rca Corp | Multiple-grid thermionic tube |
US1811051A (en) * | 1923-11-27 | 1931-06-23 | Philips Nv | Electron discharge tube |
US1984877A (en) * | 1930-11-21 | 1934-12-18 | Telefunken Gmbh | Gaseous discharge amplifier tube |
US2235498A (en) * | 1940-01-11 | 1941-03-18 | Rca Corp | Electron discharge device |
-
0
- NL NL65336D patent/NL65336C/xx active
-
1947
- 1947-02-12 US US728014A patent/US2491234A/en not_active Expired - Lifetime
- 1947-03-26 GB GB8237/47A patent/GB654943A/en not_active Expired
-
1948
- 1948-10-23 DE DEP19289A patent/DE823012C/de not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1811051A (en) * | 1923-11-27 | 1931-06-23 | Philips Nv | Electron discharge tube |
US1750058A (en) * | 1924-01-23 | 1930-03-11 | Radio Patents Corp | Discharge tube containing auxiliary electrodes |
US1779550A (en) * | 1925-08-01 | 1930-10-28 | Rca Corp | Multiple-grid thermionic tube |
US1984877A (en) * | 1930-11-21 | 1934-12-18 | Telefunken Gmbh | Gaseous discharge amplifier tube |
US2235498A (en) * | 1940-01-11 | 1941-03-18 | Rca Corp | Electron discharge device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2708726A (en) * | 1948-12-04 | 1955-05-17 | Emi Ltd | Electron discharge device employing secondary electron emission and method of making same |
US3064178A (en) * | 1958-05-19 | 1962-11-13 | Union Carbide Corp | Inert-gas arc rectifier |
Also Published As
Publication number | Publication date |
---|---|
DE823012C (de) | 1951-11-29 |
GB654943A (en) | 1951-07-04 |
NL65336C (de) |
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