US1955391A - Electrode construction for glow discharge tubes - Google Patents
Electrode construction for glow discharge tubes Download PDFInfo
- Publication number
- US1955391A US1955391A US584789A US58478932A US1955391A US 1955391 A US1955391 A US 1955391A US 584789 A US584789 A US 584789A US 58478932 A US58478932 A US 58478932A US 1955391 A US1955391 A US 1955391A
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- US
- United States
- Prior art keywords
- anode
- cathode
- glow discharge
- electrodes
- amplifier
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J21/00—Vacuum tubes
- H01J21/36—Tubes with flat electrodes, e.g. disc electrode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
- H01J3/02—Electron guns
- H01J3/025—Electron guns using a discharge in a gas or a vapour as electron source
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0061—Tubes with discharge used as electron source
Definitions
- the invention relates to amplifier tubes having a gaseous atmosphere wherein the electron source consists of a glow or gaseous discharge. The electrons, beyond the anode of this discharge,
- the anode for the electron-supplying glow discharge is so shaped and is so disposed in reference to the glow that it cuts oil all rectilinear connection between the glow and the amplifier space.
- the invention relates to a tube of this kind, and its object is to make the screening effect of the anode of the glow discharge still more effective, whileinsuring at the same time a rugged mounting of the glow discharge electrodes.
- the fiat or strip shaped glow discharge cathode is snugly laid upon a broader glow discharge anode, which is likewise fiat or strip shaped, between these two electrodes is interposed an insulating layer, and both electrodes are united as shown in the drawing by insulating connections so as to result in a unit or assembly.
- the negative glow therefore is able to arise only upon the free surface of the cathode strip.
- the functional conditions first indicated are fulfilled inasmuch as the broader glow discharge anode completely screens the amplifier space from the glow discharge, and the paths of the electron issuing from the glow will be predominantly in directions away from the amplifier electrodes, owing to the surface effect of the cathode.
- the electrons will be able to reach the field of the amplifier anode only in roundabout ways, i. e., after being appreciably retarded or slowed up by multiple collisions with gas particles.
- Figs. 2 and 3 the mounting of the electrodes 4 and 5 is shown upon an enlarged scale.
- 6 is the insulating layer interposed between 4 and 5 and consisting preferably of a slender strip of mica
- 7 and 8 are clamps or fingers at the ends of an electrode holder 9 in which the electrodes 4 and 5 are held by strips 10 of mica or other insulation lying across the ends of the electrodes and clamped down on the electrodes by the fingers 7 and 8, which are insulated from the electrodes but hold them firmly in place, the holder and the electrodes forming a unit or assembly in which the electrodes are accurately and firmly positioned.
- the holders are easily mounted in the tube without affecting the relative positions of the electrodes.
- a gaseous discharge amplifier comprising a sealed envelope enclosing a plate, a control grid, and a glow discharge electron source comprising a fiat cathode and a fiat anode wider than said cathode, a sheet of insulation sandwiched between and in contact with said anode and cathode throughout their length, and means for holding said anode and said cathode with said anode interposed between said cathode and said plate.
- a gaseous discharge amplifier comprising a sealed envelope enclosing a plate, a control grid, and a glow discharge electron source comprising a fiat cathode and a fiat anode wider than said cathode, a sheet of insulation sandwiched between and in contact with said anode and cathode throughout their length, a holder for clamping together said anode, said sheet of insulation and said cathode with one side of said cathode exposed, said holder being insulated from said anode and said cathode and mounted with the exposed surface of said cathode turned away from said plate.
- a gaseous discharge amplifier comprising a sealed envelope enclosing a plate, a control grid gaseous amplifiers comprising a flat cathode, a flat anode wider than said cathode, a sheet of insulation sandwiched between and in contact with said anode and said cathode, a holder adjacent said anode and having at each end clamping fingers to encircle said anode and engage said cathode, and insulation between said cathode and said fingers and between said holder and said anode.
Description
April 17, 1934. Q 1,955,391
ELECTRODE CONSTRUCTION FOR GLOW DISCHARGE TUBES Filed Jan. 5, 1952 INVENTOR FRITZ SCHROTER M'lH/t/ ATTORNEY Patented Apr. 17, 1934 PATE NT OFFICE ELECTRODE CONSTRUCTION FOR GLOW DISCHARGE TUBES Fritz Schriiter, Berlin, Germany, assignor to Telefunken Gesellschaft fur Drahtlose Telegraphic in. b. H., Berlin, Germany, a corporation of Germany Application January 5, 1932, Serial No. 584,789 In Germany January 27, 1931 4 Claims.
The invention relates to amplifier tubes having a gaseous atmosphere wherein the electron source consists of a glow or gaseous discharge. The electrons, beyond the anode of this discharge,
are attracted by the field of the amplifier anode or the plate and flow towards it in quantities subject to the control action of a grid. In order that the grid current incidentally arising may be minimized the anode for the electron-supplying glow discharge is so shaped and is so disposed in reference to the glow that it cuts oil all rectilinear connection between the glow and the amplifier space.
The invention relates to a tube of this kind, and its object is to make the screening effect of the anode of the glow discharge still more effective, whileinsuring at the same time a rugged mounting of the glow discharge electrodes. To this end the fiat or strip shaped glow discharge cathode is snugly laid upon a broader glow discharge anode, which is likewise fiat or strip shaped, between these two electrodes is interposed an insulating layer, and both electrodes are united as shown in the drawing by insulating connections so as to result in a unit or assembly. The negative glow therefore is able to arise only upon the free surface of the cathode strip. Now, if the assembly is mounted inside the amplifier tube in such a way that the cathode surface is turned away from the space containing the control grid and the amplifier anode or plate, the functional conditions first indicated are fulfilled inasmuch as the broader glow discharge anode completely screens the amplifier space from the glow discharge, and the paths of the electron issuing from the glow will be predominantly in directions away from the amplifier electrodes, owing to the surface effect of the cathode. Hence, the electrons will be able to reach the field of the amplifier anode only in roundabout ways, i. e., after being appreciably retarded or slowed up by multiple collisions with gas particles.
In the accompanying drawing which illustrates one embodiment of the invention by way of example; Figure 1 is a diagrammatic top view of an amplifier having a coaxial arrangement of the electrodes; Figure 2 is a front view and Figure 3 a cross section on the line 33 of Figure 2. In the drawing 1 is the wall of the tube bulb, 2 is a cylindrical amplifier anode or plate positioned in the axis of the bulb, 3 is the control grid surrounding the said plate, and 4 and 5 are the constructionally intimately united parts of the glow discharge electrode system or unit, 4 being the anode and 5 the cathode. The electrons in the main will be able to escape only in directions away from the plate 2, hence, they will first reach the range of the control grid after a considerable number of reflecting collisions.
In Figs. 2 and 3 the mounting of the electrodes 4 and 5 is shown upon an enlarged scale. In these figures 6 is the insulating layer interposed between 4 and 5 and consisting preferably of a slender strip of mica, and 7 and 8 are clamps or fingers at the ends of an electrode holder 9 in which the electrodes 4 and 5 are held by strips 10 of mica or other insulation lying across the ends of the electrodes and clamped down on the electrodes by the fingers 7 and 8, which are insulated from the electrodes but hold them firmly in place, the holder and the electrodes forming a unit or assembly in which the electrodes are accurately and firmly positioned. The holders are easily mounted in the tube without affecting the relative positions of the electrodes.
Having thus described my invention, what I claim is:
1. A gaseous discharge amplifier comprising a sealed envelope enclosing a plate, a control grid, and a glow discharge electron source comprising a fiat cathode and a fiat anode wider than said cathode, a sheet of insulation sandwiched between and in contact with said anode and cathode throughout their length, and means for holding said anode and said cathode with said anode interposed between said cathode and said plate.
2. A gaseous discharge amplifier comprising a sealed envelope enclosing a plate, a control grid, and a glow discharge electron source comprising a fiat cathode and a fiat anode wider than said cathode, a sheet of insulation sandwiched between and in contact with said anode and cathode throughout their length, a holder for clamping together said anode, said sheet of insulation and said cathode with one side of said cathode exposed, said holder being insulated from said anode and said cathode and mounted with the exposed surface of said cathode turned away from said plate.
3. A gaseous discharge amplifier comprising a sealed envelope enclosing a plate, a control grid gaseous amplifiers comprising a flat cathode, a flat anode wider than said cathode, a sheet of insulation sandwiched between and in contact with said anode and said cathode, a holder adjacent said anode and having at each end clamping fingers to encircle said anode and engage said cathode, and insulation between said cathode and said fingers and between said holder and said anode.
FRITZ scHRoTER.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1955391X | 1931-01-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1955391A true US1955391A (en) | 1934-04-17 |
Family
ID=7781822
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US584789A Expired - Lifetime US1955391A (en) | 1931-01-27 | 1932-01-05 | Electrode construction for glow discharge tubes |
Country Status (1)
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US (1) | US1955391A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2686888A (en) * | 1950-12-04 | 1954-08-17 | Hartford Nat Bank & Trust Co | Vacuum discharge tube |
US2880351A (en) * | 1951-11-06 | 1959-03-31 | Philips Corp | Vacuum discharge tube |
US3480820A (en) * | 1967-09-08 | 1969-11-25 | Burroughs Corp | Indicator tube having auxiliary electrodes for maintaining cathode glow |
-
1932
- 1932-01-05 US US584789A patent/US1955391A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2686888A (en) * | 1950-12-04 | 1954-08-17 | Hartford Nat Bank & Trust Co | Vacuum discharge tube |
US2880351A (en) * | 1951-11-06 | 1959-03-31 | Philips Corp | Vacuum discharge tube |
US3480820A (en) * | 1967-09-08 | 1969-11-25 | Burroughs Corp | Indicator tube having auxiliary electrodes for maintaining cathode glow |
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