US2468836A - Anode tube for ionic valves for highvoltage static current converters - Google Patents
Anode tube for ionic valves for highvoltage static current converters Download PDFInfo
- Publication number
- US2468836A US2468836A US631678A US63167845A US2468836A US 2468836 A US2468836 A US 2468836A US 631678 A US631678 A US 631678A US 63167845 A US63167845 A US 63167845A US 2468836 A US2468836 A US 2468836A
- Authority
- US
- United States
- Prior art keywords
- bodies
- anode tube
- highvoltage
- static current
- current converters
- 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
Images
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0048—Tubes with a main cathode
- H01J2893/0051—Anode assemblies; screens for influencing the discharge
Definitions
- the United States Patent 2,446,600 of Uno Lamm describes an anode tube for ionic valves for high voltage static current converters having a number of conducting bodies adjacent to the current path and serving to equalize the voltage during the impermeable periods, said conducting bodies being so dimensioned as to fill out a certain portion of the volume inside the anode tube between the anode and the cathode space.
- this condition has been defined more precisely so, that it refers to the external dimensions of the bodies but does not exclude the provision of cavities in the bodies which in electrostatic respectcan be regarded as entirely closed, i. e. that no electric fields producing or maintaining an ionisation can be formed therein. Such cavities are then regarded as integrating parts of the bodies.
- the cavities will serve, at the alternative expansion of the vapor columns in the arc channels during the operating periods and contraction of the said columns during the impermeable periods, as a kind of equalizing receptacles and thus reduce the speed of the longitudinal movements of the vapor, whereby an equal distribution of the electric field along the conductive bodies is facilitated.
- the manufacturing of the bodies pressed from sheet metal is as a rule easier than that of solid bodies which need turning.
- An anode tube having conducting bodies of the aforesaid type forms the object of the present invention.
- a form of the invention is illustrated in the accompanying drawing which shows a portion of an anode tube with conducting bodies therein equalizing.
- Each such body preferably consists of two parts of sheet metal, pressed into a suitable dish shape and welded together at the periphery end enclosing a hollow space which communicates with each arc channel 4 (several such channels being arranged on the periphery of a circle) by an annular slot 3 but is otherwise preferably closed so that no electric field. can be formed therein, as its walls have the same potential everywhere. Small openings, if any, do not disturb this condition.
- graphite rings 6 may for instance be introduced into the bodies at the periphery thereof. It is of course also possible to secure the pins 5 in some suitable sheet metal structure.
- the leads 1 serving to keep the bodies 2 at an appropriate potential may be screwed directly to the sheet metal in the manner illustrated and may be terminated in a vacuum-tight manner outside the tube l in a way previously described.
- anode 8 which has, opposite the circular row of arc channels, an annular groove 9.
- the purpose of this shaping of the anode is to establish a communication between the parallel channels, in which an arc-back current, if arising, shall have the possibility of developing freely, as it may otherwise cause over-voltages which may be more dangerous than the arc-back itself.
- the same result may be gained by placing the anode at a larger distance from the first conducting body than the mutual distance between the rest of said bodies.
- An anode tube for ionic valves for high volt- 2.
- An anode tube according to claim 1 having a plurality of parallel current carrying channels, and in which a communication permitting a flow of current is established between said channels at the anode end of the tube.
Landscapes
- Electrolytic Production Of Metals (AREA)
Description
May 3, 1949. G. J. PERSSON 2,468,836
ANODE TUBE FOR IONIC VALVES FOR HIGH-VOLTAGE STATIC CURRENT CONVERTERS Filed Nov. 29, 1945 Patented May 3, 1949 AN ODE TUBE FOR IONIC VALVES FOR HIGH- VOLTAGE STATIC CURRENT CONVERTERS Gunnar J. Persson, Ludvika, Sweden, assignor to Elektriska Aktiebolaget, Vasteras, Sweden, a corporation of Sweden Application November 29, 1945, Serial No. 631,678 In Sweden July 10, 1944 Section 1, Public Law 690, August 8, 1946 Patent expires July 10, 1964 Allmanna Svenska 4 Claims.
The United States Patent 2,446,600 of Uno Lamm describes an anode tube for ionic valves for high voltage static current converters having a number of conducting bodies adjacent to the current path and serving to equalize the voltage during the impermeable periods, said conducting bodies being so dimensioned as to fill out a certain portion of the volume inside the anode tube between the anode and the cathode space. In the specification of the said patent application, this condition has been defined more precisely so, that it refers to the external dimensions of the bodies but does not exclude the provision of cavities in the bodies which in electrostatic respectcan be regarded as entirely closed, i. e. that no electric fields producing or maintaining an ionisation can be formed therein. Such cavities are then regarded as integrating parts of the bodies.
It has now been found, that it is often advisable to construct such hollow voltage equalizing bodies, whether they satisfy the dimensioning rule given in Patent 2,446,600 or not, of sheet metal, preferably sheet iron, in such manner that their cavities, except the channels for conducting the current, will be comparatively free from electric fields and from discharges. It is generally easier to produce sheet iron than solid iron bodies of the high degree of purity which is necessary in static current converter vessels. It may also be advantageous that the volume of the inner cavities is comparatively large, especially if the bodies are so constructed that these cavities communicate directly with the through channels for the arcs. Hereby the cavities will serve, at the alternative expansion of the vapor columns in the arc channels during the operating periods and contraction of the said columns during the impermeable periods, as a kind of equalizing receptacles and thus reduce the speed of the longitudinal movements of the vapor, whereby an equal distribution of the electric field along the conductive bodies is facilitated. Finally, the manufacturing of the bodies pressed from sheet metal is as a rule easier than that of solid bodies which need turning. An anode tube having conducting bodies of the aforesaid type forms the object of the present invention.
A form of the invention is illustrated in the accompanying drawing which shows a portion of an anode tube with conducting bodies therein equalizing. Each such body preferably consists of two parts of sheet metal, pressed into a suitable dish shape and welded together at the periphery end enclosing a hollow space which communicates with each arc channel 4 (several such channels being arranged on the periphery of a circle) by an annular slot 3 but is otherwise preferably closed so that no electric field. can be formed therein, as its walls have the same potential everywhere. Small openings, if any, do not disturb this condition. It is also possible, instead of welding the two parts together, to insulate them from each other and to leave therebetween a small voltage difference insuificient for producing a disturbing electric field. Through the annular slots 3, the aforesaid equalizing of pressure variations in the arc channels 4 may take place.
For securing pins 5 intended to hold the bodies in the enclosing tube in a manner described in Patent 2,446,600, graphite rings 6 may for instance be introduced into the bodies at the periphery thereof. It is of course also possible to secure the pins 5 in some suitable sheet metal structure. The leads 1 serving to keep the bodies 2 at an appropriate potential may be screwed directly to the sheet metal in the manner illustrated and may be terminated in a vacuum-tight manner outside the tube l in a way previously described.
At the top of the tube I, there is shown an anode 8 which has, opposite the circular row of arc channels, an annular groove 9. The purpose of this shaping of the anode is to establish a communication between the parallel channels, in which an arc-back current, if arising, shall have the possibility of developing freely, as it may otherwise cause over-voltages which may be more dangerous than the arc-back itself. The same result may be gained by placing the anode at a larger distance from the first conducting body than the mutual distance between the rest of said bodies.
I claim as my invention:
1. An anode tube for ionic valves for high volt- 2. An anode tube according to claim 1 in which said empty spaces of the bodies are in direct communication with said channels for the passage of the current.
3. An anode tube-according to claim 1 in which graphite rings are inserted in said bodies at the periphery thereof, and holding members for said bodies secured in said graphite rings.
4. An anode tube according to claim 1 having a plurality of parallel current carrying channels, and in which a communication permitting a flow of current is established between said channels at the anode end of the tube.
GUNNAR J. PERSSON.
4 REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 2,251,923 Druyvesteyn Aug. 12, 1941 2,301,980 Steenbeck Nov. 17, 1942 FOREIGN PATENTS Number Country Date 442,092 Great Britain Feb. 3, 1936 442,414 Great Britain Feb. 7, 1936 459,863 Great Britain Jan. 15, 1937 469,246 Germany June 14, 1921 555,509 Great Britain Aug. 26, 1943
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE2468836X | 1944-07-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2468836A true US2468836A (en) | 1949-05-03 |
Family
ID=20425767
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US631678A Expired - Lifetime US2468836A (en) | 1944-07-10 | 1945-11-29 | Anode tube for ionic valves for highvoltage static current converters |
Country Status (1)
Country | Link |
---|---|
US (1) | US2468836A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10100537B1 (en) | 2017-06-20 | 2018-10-16 | Allen Engineering Corporation | Ventilated high capacity hydraulic riding trowel |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE469246C (en) * | 1921-06-14 | 1928-12-06 | Siemens Schuckertwerke Akt Ges | Metal vapor rectifier with electrically conductive, but not directly involved, perforated transverse walls arranged in the discharge path |
GB442092A (en) * | 1934-09-03 | 1936-02-03 | Gen Electric Co Ltd | Improvements in or relating to electric arc converters |
GB442414A (en) * | 1934-08-24 | 1936-02-07 | British Thomson Houston Co Ltd | Improvements in and relating to grid-controlled electric discharge rectifiers |
GB459863A (en) * | 1935-07-15 | 1937-01-15 | Gen Electric Co Ltd | Improvements in or relating to vapour electric converters |
US2251923A (en) * | 1938-11-11 | 1941-08-12 | Hartford Nat Bank & Trust Co | Ionic discharge tube |
US2301980A (en) * | 1939-07-06 | 1942-11-17 | Steenbeck Max | Metallic-vapor discharge device |
GB555509A (en) * | 1940-11-11 | 1943-08-26 | Bbc Brown Boveri & Cie | Improvements in and relating to anode leads for high voltage current rectifiers |
-
1945
- 1945-11-29 US US631678A patent/US2468836A/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE469246C (en) * | 1921-06-14 | 1928-12-06 | Siemens Schuckertwerke Akt Ges | Metal vapor rectifier with electrically conductive, but not directly involved, perforated transverse walls arranged in the discharge path |
GB442414A (en) * | 1934-08-24 | 1936-02-07 | British Thomson Houston Co Ltd | Improvements in and relating to grid-controlled electric discharge rectifiers |
GB442092A (en) * | 1934-09-03 | 1936-02-03 | Gen Electric Co Ltd | Improvements in or relating to electric arc converters |
GB459863A (en) * | 1935-07-15 | 1937-01-15 | Gen Electric Co Ltd | Improvements in or relating to vapour electric converters |
US2251923A (en) * | 1938-11-11 | 1941-08-12 | Hartford Nat Bank & Trust Co | Ionic discharge tube |
US2301980A (en) * | 1939-07-06 | 1942-11-17 | Steenbeck Max | Metallic-vapor discharge device |
GB555509A (en) * | 1940-11-11 | 1943-08-26 | Bbc Brown Boveri & Cie | Improvements in and relating to anode leads for high voltage current rectifiers |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10100537B1 (en) | 2017-06-20 | 2018-10-16 | Allen Engineering Corporation | Ventilated high capacity hydraulic riding trowel |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2043733A (en) | High voltage vacuum discharge tube | |
US2468836A (en) | Anode tube for ionic valves for highvoltage static current converters | |
US2295569A (en) | Gaseous electron discharge device | |
US2482495A (en) | Magnetron | |
US2797348A (en) | Grid system for gaseous discharge device | |
US3349283A (en) | High voltage gas discharge tube having a plurality of grids spaced apart along a ceramic envelope | |
US2512538A (en) | Electric discharge device | |
US3979634A (en) | Travelling-wave tube with an improved electron gun | |
US2005021A (en) | Vacuum tube | |
US3112401A (en) | Shielding to confine magnetic field to ion source area of a neutron generator | |
US2810095A (en) | Magnetron device | |
US3594604A (en) | High-power electron tube having two longitudinally displaced cathode sections | |
US2297721A (en) | Electrical gaseous discharge control device | |
US1945639A (en) | Discharge tube | |
US3337764A (en) | Cool discharge tubes of hollow ring-like construction | |
US3152276A (en) | Electron tube having coaxial terminals for an interiorly emissive cathode | |
US3295013A (en) | Electron tubes containing gas below critical pressure | |
US2942136A (en) | Low pressure gas filled thermionic valve | |
US2490542A (en) | Mercury arc rectifier | |
US2535886A (en) | Electronic switch | |
US3885183A (en) | Thyratrons | |
US3432713A (en) | High current vacuum gap devices with slotted electrode vanes | |
GB1191224A (en) | Construction and cooling arrangement for electrodes in an electron discharge device | |
US2585439A (en) | Magnetic controlled gas rectifier tube | |
US2189318A (en) | Electron multiplier tube |