US1990041A - Method for producing multiple electron discharge devices - Google Patents

Method for producing multiple electron discharge devices Download PDF

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Publication number
US1990041A
US1990041A US460673A US46067330A US1990041A US 1990041 A US1990041 A US 1990041A US 460673 A US460673 A US 460673A US 46067330 A US46067330 A US 46067330A US 1990041 A US1990041 A US 1990041A
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United States
Prior art keywords
barium
systems
anode
pocket
cathode
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Expired - Lifetime
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US460673A
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English (en)
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Loewe Siegmund
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Individual
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Individual
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
    • H01J9/042—Manufacture, activation of the emissive part

Definitions

  • the invention relates to high emission tubes be reached simultaneously in the two anodal to be used asamplifying, as rectifying and as systems.” transmitting valves.
  • Such high emission valves are', for instance,'manufactured at present by the i. e. a suitable choice of the heating and radiating 5.
  • metal vapour process For this purpose a light conditions of the two anodal systems, however, li:
  • the multiple tube may, for instance, consist of a case of. simple tubes this method entails no difli powerful terminal (end stage) system and a priculty.
  • the anode is used as a carrier for the submary stage which is'to act as voltage amplifier. 1 a: stance to be evaporated.
  • the multiple tubes may contain coupling elements sufiiciently heated, the barium will be caused for connecting the systems; but my invention is to evaporate.
  • the barium is produced either not limited to'such kinds of multiple tubes.
  • the from barium acetate or from a reaction compound terminal stage is in practice appropriately adwhichmay consist, for instance, "of barium oxide justed to a medium emission of 50 milliamperes, lol and silicon. J while in the other system'the emission of the The method will, however, be unsatisfactory filament is of the order of only one tenth milliif'ina common vacuum more than one cathode ampere; In this 'connection'great practical diffisystem is'to be coated.
  • Theobject may, for inculties would arise 'ifiboth anod'estwere to be stance be to produce by the vapourprocess the dimensioned according to the above principle.
  • the evaporation process may, according'to the in- In Fig. 1 l is the cross-section through the vention; be solved by the various anodes 'arglass'bulbof a two stage (double)-amplifier tube. ranged in the tube being made of such dimensions 2.is the cross-section through the oval-cylindri- 40 that under the influence of a common eddy curcal anode (plate) of the terminal power stage.
  • anode 6 has a higher or lower temperature than anode 2, as it may easily be arranged that at the points where the pockets 5 and 9 are situated the evaporation temperature of barium is reached at the same time.
  • I have indicated by arrows starting from the two pockets the direction into which the vapour of the barium will go.
  • cathodes produced by the metal evaporation process sometimes lose in their efiiciency. This loss, however, does not occur, if a residue of the vaporizable substance has remained in the cathode and if the anode either under operating conditions or by occasional overloading is subjected to such an increase of temperature that a continuous, though only weak evaporation of the stored barium takes place. It is obvious even if a residue of barium had remained in the anode 6 of the voltage stage, that then owing to the extremely small load of such anode no increase of temperature of the same and therefore no further evaporation would take place.
  • the metal vapour source for the voltage amplification stage is arranged directly at the power anode 2, upon the overloading of such anode or upon strong operative loading of the same a permanent additional evaporation of the barium will take place by which the voltage stage which remains in itself cold and unloaded will also profit.
  • Fig. 2 a small modification is shown where more than one primary or initial stage is produced in the same manner.
  • the designations have the same meaning as in Fig. 1, there being, however, a pocket 10 in addition to pocket 9 and a further system 11, 12, 13 in addition. to the system 6, '7, 8, the additional system being treated in the same manner as described above.
  • Fig. 3 shows a somewhat difierent form of construction in which the barium vapour developed in the pocket 9 feeds not only a single initial stage consisting of the anode system 6, '7, 8, but in the same direction a further initial stage consisting of the system 14, 15, 16.
  • the vapour may be passed axially in lengthwise direction through cylindrical systems.
  • the barium source may be taken for a large number of different systems from a single heatable metal mass which need not necessarily be an anode or generally an electrode of the amplifier systems.
  • the second way of solving the problem of my invention consists in coating several cathodes belonging to different discharging systems with a highly emissive layer from a common support carrying the barium substance which support has been heated.
  • a multiple valve comprising several electrode systems, each electrode system consisting of a plate, a grid and a cathode coated with a highly emissive barium layer, one of the anodes of said electrode systems being provided with pockets for containing the reaction compounds from which the highly emissive barium layers of the cathodes may be produced, the pocket for containing the barium compound for coating the cathode of the system belonging to said anode being opened to the inside of said system, the pocket containing the barium compounds for coating the cathodes of the other electrode systems being opened towards these other electrode systems, said other electrode systems having no anode-portion between its cathode and the pocket for containing the reaction mixture for coating said cathode.
  • a multiple valve comprising several electrode systems, each electrode system consisting of a plate, a grid and a cathode coated with a highly emissive barium layer, one of the anodes of said electrode systems being provided with pockets for containing the reaction compounds from which the highly emissive barium layers of the cathodes may be produced, the pocket for containing the barium compound for coating the cathode of the system belonging to said anode being opened to the inside of said system, the pocket containing the barium compounds for coating the cathodes of the other electrode systems being opened towards these other electrode systems, said other electrode systems having no anode-portion between its cathode and the pocket for'containing the reaction mixture for coating said cathode, and a sieve-shaped screen arranged between said pocket and said electrode systems and adapted to be connected to a suitablev potential.
  • a multiple valve comprising several electrode systems, each electrode system consisting of a plate, a grid and a cathode coated with a highly emissive earth' alkaline' metal layer, one of the anodes of said electrode systems being provided with pockets for containing the reaction compounds from which the highly emissive layers of the cathodes may be produced, the pocket for containing the earth alkaline metal compound for coating the cathode of the system belonging to said anode being opened to the inside of said system, the pocket containing the earth alkaline metal compounds for coating the cathodes of the other electrode systems being opened towards these other electrode systems, said other electrode systems having no anode-portion between their cathodes and the pocket containing the reaction mixture for coating said cathodes.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Discharge Lamp (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Physical Vapour Deposition (AREA)
US460673A 1929-06-07 1930-06-12 Method for producing multiple electron discharge devices Expired - Lifetime US1990041A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL75324D DE628900C (de) 1929-06-07 1929-06-07 Verfahren zum Herstellen von hochemittierenden Kathoden in Mehrsystemroehren

Publications (1)

Publication Number Publication Date
US1990041A true US1990041A (en) 1935-02-05

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ID=34876961

Family Applications (1)

Application Number Title Priority Date Filing Date
US460673A Expired - Lifetime US1990041A (en) 1929-06-07 1930-06-12 Method for producing multiple electron discharge devices

Country Status (7)

Country Link
US (1) US1990041A (de)
AT (1) AT130795B (de)
BE (1) BE370899A (de)
DE (1) DE628900C (de)
FR (1) FR697130A (de)
GB (1) GB353624A (de)
NL (1) NL30240C (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635201A (en) * 1949-09-30 1953-04-14 Rca Corp Electronic discharge device
US2682619A (en) * 1948-08-19 1954-06-29 Sylvania Electric Prod Cold cathode gas discharge tube
US2758239A (en) * 1952-09-13 1956-08-07 Varian Associates Getter and method of making same
US2834905A (en) * 1956-03-28 1958-05-13 Bendix Aviat Corp Electron discharge device
US2845324A (en) * 1954-12-03 1958-07-29 Itt Gas discharge tube

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2682619A (en) * 1948-08-19 1954-06-29 Sylvania Electric Prod Cold cathode gas discharge tube
US2635201A (en) * 1949-09-30 1953-04-14 Rca Corp Electronic discharge device
US2758239A (en) * 1952-09-13 1956-08-07 Varian Associates Getter and method of making same
US2845324A (en) * 1954-12-03 1958-07-29 Itt Gas discharge tube
US2834905A (en) * 1956-03-28 1958-05-13 Bendix Aviat Corp Electron discharge device

Also Published As

Publication number Publication date
AT130795B (de) 1932-12-10
NL30240C (de)
GB353624A (de) 1931-07-30
BE370899A (de)
DE628900C (de) 1936-04-18
FR697130A (fr) 1931-01-12

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