US2910607A - Ceramic type electron tube - Google Patents

Ceramic type electron tube Download PDF

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Publication number
US2910607A
US2910607A US486199A US48619955A US2910607A US 2910607 A US2910607 A US 2910607A US 486199 A US486199 A US 486199A US 48619955 A US48619955 A US 48619955A US 2910607 A US2910607 A US 2910607A
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United States
Prior art keywords
rings
ceramic
cathode
metal
tube
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
Application number
US486199A
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English (en)
Inventor
Jack A Mccullough
Paul D Williams
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Varian Medical Systems Inc
Original Assignee
Eitel Mccullough Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Eitel Mccullough Inc filed Critical Eitel Mccullough Inc
Priority to US486199A priority Critical patent/US2910607A/en
Priority to DEE11240A priority patent/DE1123050B/de
Priority to CH336507D priority patent/CH336507A/fr
Application granted granted Critical
Publication of US2910607A publication Critical patent/US2910607A/en
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/34—Gastight accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members
    • F16K15/148—Check valves with flexible valve members the closure elements being fixed in their centre
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L14/00—Electric lighting devices without a self-contained power source, e.g. for mains connection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/01—Control of flow without auxiliary power
    • G05D7/0106—Control of flow without auxiliary power the sensing element being a flexible member, e.g. bellows, diaphragm, capsule
    • G05D7/012—Control of flow without auxiliary power the sensing element being a flexible member, e.g. bellows, diaphragm, capsule the sensing element being deformable and acting as a valve
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J21/00—Vacuum tubes
    • H01J21/02—Tubes with a single discharge path
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • Another object is to provide a tube adapted for fabrication without skilled personnel and in which the stacked type of structure is ideally'suited for assembly by automatic machine operations.
  • Another object is to improve the life expectancy of electron tubes and to insure reasonably long life even under adverse operating conditions.
  • a further object is to provide an electron tube adapted to be wired or soldered into a circuit in a manner similar to a condenser or a resistor.
  • Still another object includes the provision of a stacked ceramic type tube wherein flat metal rings are sand wiched between ceramic rings of the envelope, which metal rings provide electrode supports and terminals.
  • a further object is to provide a tube of the character described in which the electrodes and associated envelope wall members are first stacked in separate subassemblies, these structural units being then stacked and sealed together to complete the envelope.
  • a still further object is to provide a tube structure and assembly technique which is particularly well adapted for the smaller tubes such as those in the receiving tube category.
  • Figure 1 is a plan view of a duo-diode embodying the improvements of our invention.
  • Figure 2 is an elevational view of the same.
  • Figure 3 is an enlarged vertical sectional view of the duo-diode.
  • Figure 4 is a horizontal section taken in a plane indicated by line 4-4 of Figure 3.
  • Figure f is a fully exploded sectional view of the tube.
  • Figure 6' is a partially exploded view of the same, showing the subassemblies; V i Figures 7, 8, 9, 10 and 11 show our improvementsincorporated in a duo-triode and correspond to Figures 1, 2, 3, S and 6 of the duo-diode.
  • the duo-diode embodying our invention comprises an evacuated envelope of generally cylindrical shape resembling a pill box.
  • duo-diode illustrated is a twin rectifier in the receiving tube category, the actual tube being about one inch in diameter and approximately inch high.
  • the entire tube is made up of ceramic and metal parts which fit together in stacked relationship, the end walls being of metal to provide anodes and the cylindrical side wall comprising ceramic and metal rings sandwiched and brazed together, which metal rings serve assupports for internal electrodes and also as electrode terminals.
  • our stacked tube structure comprises a series of five ceramic rings 1, 2, 3, 4 and 5 with four fiat metal rings 6, 7, 8 and 9 sandwiched -therebetween.
  • the ceramic is preferably a highly refractory material such as alumina which is a dense body of good mechanical strength, these ceramic rings being metalized at both ends by a suitable metalizing procedure such as the molybdenum-manganese powder sintering process.
  • the interposed metal rings are quite thin, say about .020
  • brazed joints form strong mechanical bonds and also provide vacuum-tight seals so that the cylindrical side wall of the final tube is a solid impervious cylinder of rugged construction.
  • the envelope structure provides the desired electrical insulation between metal members without sacrifice of ruggedness, it being recalled that an object of our invention is to provide an electron tube of superior reliability under adverse conditions such as shock and vibration.
  • an object of our invention is to provide an electron tube of superior reliability under adverse conditions such as shock and vibration.
  • the ceramic bodies and brazing compositions are all of thermal-resistant materials, thus providing an envelope structure which will operate without failure in high ambient temperatures, such as in aircraft where high ambients are frequently encountered.
  • sandwiched metal rings in the side wall structure provides the desired electrical lead-in conductors through the envel0pe, which rings perform the dual functionof electrode anchoring supports and terminal members.
  • An important structural feature here is that these interposed metal rings are relatively thin compared to the thickness of the adjacent ceramic rings. This mini mizes any mismatch due to difierences in thermal coefiicients of expansion and further enhances the mechanical strength of the layer-like wall structure under conditions of thermal shock over wide ranges of heat cycling.
  • the ceramic rings are of simple rectangular crosssection and all of the same dimensions, so that one size of ceramic body satisfies the entire tube. This is important in the interests of simplicity and economy.
  • End walls 11 of the envelope are of metal, preferably stamped out of copper disks, and also provide the anodes 12 of the tube. These anode walls are dished inwardly so that the two circular anodes are brought together into for insulation purposes.
  • the duo-diode illustrated hasan oxide coated type of cathode, preferably withtwoseparate electron emitting.v
  • Such cathode structure simply comprises two nickel cathode disks 13,
  • each' half ofthe cathode is put together as a: unitary structure; namely, a cathode disk' together with its radial supports and side wall ring areall made upand weldedtogether as one piece (see Figure-5).
  • the reason for the slender rod-like supports for the cathode disks is to minimize heat conduction away fromthe cathode and thus keep the heater watts down.
  • Adequate mechanical support and rigidity are obtained by arranging the inwardly extending, supporting rods 14 in conical formation, the rods of each half of the cathode converging toward the center'of the envelope.
  • Similar rigidity for anodes 12 is achieved by dishing the end walls inwardly along conical surfaces, which surfaces are nested within the conically formed cathode support members 14. Extreme rigidity and compactnessof electrode structure are thus obtained.
  • the cathode heater 16 is a coil of insulated wire, formed as a toroid and interposed between the cathode One end of the heater is connected to side wall ring7 and the other end to ring 8. Thus, the heater connections are made to the inner pair of'side. wall rings, and the cathode connections are made to the outer pair of rings.
  • terminal lugs formed as integral extensions on the metal side wall rings.
  • the terminal lugs are preferably spaced about the circumference of the envelope and are identified by heater terminals H and H cathode terminals K and K and anode terminals P and'P These terminals may be used as soldering lugs for wiring.
  • the tube being described is preferably made up of individual parts or components as illustrated'in the fully exploded view of Figure 5. These components are then stacked together into three subassemblies, including a cathode-heater assembly unit and two anode assembly units.-- These three subassemblies are shown inthe partially exploded view of Figure 6. There are twov simple operations involved in making up each subassembly; first, a stacking operation, and, second, a brazing operation. Since the individual components are self-jigging concentrically and vertically, it is seen that skilled operators are not required and that the stacking is well suited to automatic machine assembly. The brazing operation is like.-
  • brazing material is preferably in the nature of thin flat rings, say .005 inch thick, first spot welded to opposite sides of the copper rings so that the brazing material is automatically incorporated when the tube parts are stacked together. Large numbers of such subassemblies can be loaded into a single furnace and brazed at one time.
  • a brazing alloy such as copper-gold isv preferablyused in makingup the subassemblies.
  • the cathode and anode assembly units may then be brazed together and the tube evacuated through an exhaust tubulation (not shown) in the usual manner.
  • the final step involves bringing thepartstogether and. making the final brazes while the.
  • Brazing material. used at the final brazes is an alloy such as copper-silver having a lower melting point than that used for brazing up the subassemblies.
  • FIGs 7 to 11 illustrate our improvements incorporated in a duo-triode.
  • This tube. is similar in structure to the duo-diode first described, and like numerals are used to designate duplicateparts, the duo-triode differing onlyby the addition of two grid structures and an additional pair of ceramic rings in the side wall.
  • Thecathode heater subassembly seen in Figure 11 isidenticalwith that of the first tube.
  • the two end'units, which in this case comprise grid-anode subassemblies, includethegrids 17 which are mounted onconical supports 18 extending inwardly from metal side wall rings 19 and 21.
  • the added pair of ceramic rings 22 and 23 serve to insulate the grids from the cathode.
  • Conical grid supports 18 are preferably stamped out as an integral "partof the side wall rings and are seated in-nested relationship-to thee anode walls.
  • the grid components are also initially made up as.unita1'y structures. viz.', the grid disks -17 are first weldedin place so that a grid disk together with its support 18 andassociated side wall ring comprises a single structure-(seetoprevent oil-canning and to provide additional rigidity.
  • cathode disks 13, grid disks 17, and anode disks 12 are all slightly domed, convex outwardly, relative to the center plane of the tube.
  • the basic diode type may be expanded into triode, tetrode or pentode types merely by stacking in the requisite. number of grids.
  • a stacked ceramic type electron tube comprising a generally cylindrical envelope having side and end walls, the side wall comprising a plurality of metalized ceramic rings with a flat metal ring sandwiched between two of said ceramic rings, the outer surface of said metal ring being exposed to the outside of said envelope, metallic bonds uniting the two ceramic rings to said metal ring, a planar type electrode in the envelope, and a conductive support for the electrode extending inwardly from said metal ring, said electrode support being of conical formation, said metal ring providing a terminal for the electrode, at least one of the end walls of the envelope being of metal providing an anode, and said anode wall being dished inwardly along a conical surface nested within the conically formed electrode support.
  • a stacked ceramic type electron tube comprising a generally cylindrical envelope having side and end walls, the side wall comprising metallized ceramic rings with a flat metal ring sandwiched between each pair of ceramic rings, metallic bonds uniting said ceramic and metal rings, the outer surface of each of said metal rings being exposed to the outside of said envelope, a circular cathode structure located centrally in the envelope, a conductive support for the cathode extending inwardly from one of said metal side wall rings, disk-shaped grids in the envelope disposed at opposite sides of the cathode, conductive supports for the grids extending inwardly from others of the metal side wall rings, said metal rings providing terminals for the cathode and grids, said grid supports being of conical formation, each converging toward the center of the envelope, the end walls of the envelope being of metal providing anodes, and said anode walls being dished inwardly along conical surfaces nested within the conically formed grid supports.
  • a stacked ceramic type electron tube comprising a generally cylindrical envelope having side and end walls, the side wall comprising five metalized ceramic rings and four flat metal rings stacked together so that a metal ring is sandwiched between each pair of the ceramic rings, metallic bonds uniting said ceramic and metal rings, the outer surface of each of said metal rings being exposed to the outside of said envelope, a circular cathode structure located centrally in the envelope and comprising a pair of electron emitting disks, a common heater for the cathode interposed between the disks, conductors for the heater connected to the center pair of the metal side wall rings, and conductive supports for the cathode disks extending inwardly from the outer pair of said metal rings, said metal rings providing terminals for the cathode disks and heater, and said end walls of the envelope being of metal providing anodes.
  • a stacked ceramic type electron tube comprising a generally cylindrical envelope having side and end Walls, the side wall comprising seven metalized ceramic rings and six flat metal rings stacked together so that a metal ring is sandwiched between each pair of the ceramic rings, metallic bonds uniting said ceramic and metal rings, the outer surface of each of said metal rings being exposed to the outside of said envelope, a circular cathode structure located centrally in the envelope and comprising a pair of electron emitting disks, a common heater for the cathode interposed between the disks, conductors for the heater connected to the center pair of the metal side wall rings, conductive supports for the cathode disks extending inwardly from the next outer pair of said metal rings, disk shaped grids in the envelope disposed at opposite sides of the cathode, conductive mp .6 ports for the grids extending inwardly from the outermost pair of said metal rings, said metal rings providing terminals for the cathodedisks and heater and grids, said grid supports being of .conical-formati
  • a cathode-heater structure for a dual electron tube of stacked ceramic construction comprising a first ceramic ring metallized on both ends, a first pair of metal rings, metallic bonds each uniting one of said pair of metal rings to one end of said first ceramic ring, a heater contained within said first ceramic ring, one end of said heater being electrically connected to one of said pair of metal rings and the other end of said heater being electrically connected to the other of said pair of metal rings, a second ceramic ring metallized on both ends, a metallic bond uniting one end of said second ceramic ring to one of said pair of metal rings opposite from said first ceramic ring and in coaxial alignment therewith, a third ceramic ring metallized on both ends, a metallic bond uniting one end of said third ceramic ring to the other of said pair of metal rings opposite from said first ceramic ring and in coaxial alignment therewith, a second pair of flat metal rings, a metallic bond uniting one of said second pair of metal rings to the free end
  • a stacked ceramic type electron tube comprising a generally cylindrical envelope having side and end walls, the side Wall comprising a plurality of metallized ceramic rings and a plurality of flat metal rings, one of said plurality of metal rings being sandwiched between each pair of ceramic rings, metallic bonds uniting said ceramic and metal rings, a double cathode structure located centrally in the envelope and comprising a pair of electron emitting disks and a common heater interposed between said disks, opposite ends of said heater being connected to difierent ones of an adjacent pair of metal rings, a conductive support for one of said cathode disks extending inwardly from another of said metal rings, a conductive support for the other of said cathode disks extending inwardly from yet another of said metal rings, said adjacent pair of metal rings providing terminals for said heater and said other metal rings each providing a terminal for the cathode disk connected thereto, and said end walls of said envelope being of metal providing anodes.
  • a stacked ceramic type electron tube comprising a generally cylindrical envelope having side and end walls, the side wall comprising metalized ceramic rings with a flat metal ring sandwiched between each pair of ceramic rings, metallic bonds uniting said ceramic and metal rings, the outer surface of each of said metal rings being exposed to the outside of said envelope, a double cathode structure located centrally in the envelope and comprising a pair of electron emitting disks, a common heater for the cathode interposed between the disks, a conductive support for one of the cathode disks extending inwardly from one of said metal side wall rings, a conductive support for the other cathode disk extending inwardly from another of said metal side wall rings, said metal rings providing terminals for the cathode disks, and said end walls of the envelope being of metal providing anodes.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)
  • Ceramic Products (AREA)
US486199A 1955-02-04 1955-02-04 Ceramic type electron tube Expired - Lifetime US2910607A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US486199A US2910607A (en) 1955-02-04 1955-02-04 Ceramic type electron tube
DEE11240A DE1123050B (de) 1955-02-04 1955-09-05 Mehrsystem-Elektronenroehre mit einer Doppelkathode und mit einer Roehrenwand aus keramischen Ringen
CH336507D CH336507A (fr) 1955-02-04 1955-12-16 Tube électronique double

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US486199A US2910607A (en) 1955-02-04 1955-02-04 Ceramic type electron tube

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US2910607A true US2910607A (en) 1959-10-27

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CH (1) CH336507A (fr)
DE (1) DE1123050B (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2978605A (en) * 1957-10-17 1961-04-04 Gen Electric Gaseous arc discharge device
US3090884A (en) * 1960-03-07 1963-05-21 Eitel Mccullough Inc Electron gun
US3176186A (en) * 1962-03-22 1965-03-30 Gen Electric Electron discharge devices and circuit component stacked assembly
US3202861A (en) * 1961-02-21 1965-08-24 Rca Corp Electrode support means
US3202866A (en) * 1960-12-23 1965-08-24 Philips Corp Twin-tetrode electron discharge device having two-wire lecher line input and u-shapedmetal strip output means
US3244000A (en) * 1960-12-20 1966-04-05 Systems Res Lab Inc Ceramic diode pressure transducer and system
US3383537A (en) * 1965-10-07 1968-05-14 Rank Organisation Ltd Metal/ceramic cathode ray tube
US3771205A (en) * 1971-03-09 1973-11-13 Sankosha Co Ltd Method of manufacturing a multiple-electrode discharge tube

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1561249A (en) * 1922-04-07 1925-11-10 Westinghouse Electric & Mfg Co Spark-gap lighting arrester
US2121600A (en) * 1936-08-26 1938-06-21 Westinghouse Electric & Mfg Co Metal tube
US2228157A (en) * 1937-08-07 1941-01-07 Hermes Patentverwertungs Gmbh Construction of gas-or vapor-filled discharge vessels
US2272374A (en) * 1939-06-16 1942-02-10 Ig Farbenindustrie Ag Device for generating a beam of ions
US2459277A (en) * 1946-12-03 1949-01-18 Gen Electric Electrode support structure for electric discharge devices
US2459859A (en) * 1945-03-23 1949-01-25 Standard Telephones Cables Ltd Grid structure for electron discharge devices
US2629066A (en) * 1951-12-10 1953-02-17 Eitel Maccullough Inc Electron tube
US2644907A (en) * 1951-05-07 1953-07-07 Eitel Mccullough Inc Electron tube
US2647218A (en) * 1950-12-26 1953-07-28 Eitel Mccullough Inc Ceramic electron tube
US2722624A (en) * 1952-04-21 1955-11-01 Machlett Lab Inc Electron tube
US2740067A (en) * 1952-10-13 1956-03-27 Eitel Mccullough Inc Ceramic vacuum tube
US2748307A (en) * 1952-03-06 1956-05-29 Gen Electric Magnetically forcused electron discharge device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE904087C (de) * 1944-06-06 1954-02-15 Siemens Ag Verfahren zur Herstellung einer Elektronenroehre mit keramischer Gefaesswand
DE911306C (de) * 1944-06-06 1954-05-13 Siemens Ag Verfahren zur Herstellung einer elektrischen Entladungsroehre mit keramischer Wand
DE860979C (de) * 1944-06-23 1952-12-29 Telefunken Gmbh Metallische Durchfuehrung durch ein keramisches Vakuumgefaess
US2425593A (en) * 1945-06-15 1947-08-12 Gen Electric Electric discharge device and electrode assembly therefor
DE846741C (de) * 1945-12-11 1952-08-18 Radio Electr Soc Fr Verfahren zum Verschluss von Vakuumroehren
DE842469C (de) * 1946-02-19 1952-06-26 Gen Electric Verfahren zum UEberziehen nichtmetallischer Werkstoffe
DE838167C (fr) * 1950-09-19 1952-05-05

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1561249A (en) * 1922-04-07 1925-11-10 Westinghouse Electric & Mfg Co Spark-gap lighting arrester
US2121600A (en) * 1936-08-26 1938-06-21 Westinghouse Electric & Mfg Co Metal tube
US2228157A (en) * 1937-08-07 1941-01-07 Hermes Patentverwertungs Gmbh Construction of gas-or vapor-filled discharge vessels
US2272374A (en) * 1939-06-16 1942-02-10 Ig Farbenindustrie Ag Device for generating a beam of ions
US2459859A (en) * 1945-03-23 1949-01-25 Standard Telephones Cables Ltd Grid structure for electron discharge devices
US2459277A (en) * 1946-12-03 1949-01-18 Gen Electric Electrode support structure for electric discharge devices
US2647218A (en) * 1950-12-26 1953-07-28 Eitel Mccullough Inc Ceramic electron tube
US2644907A (en) * 1951-05-07 1953-07-07 Eitel Mccullough Inc Electron tube
US2629066A (en) * 1951-12-10 1953-02-17 Eitel Maccullough Inc Electron tube
US2748307A (en) * 1952-03-06 1956-05-29 Gen Electric Magnetically forcused electron discharge device
US2722624A (en) * 1952-04-21 1955-11-01 Machlett Lab Inc Electron tube
US2740067A (en) * 1952-10-13 1956-03-27 Eitel Mccullough Inc Ceramic vacuum tube

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2978605A (en) * 1957-10-17 1961-04-04 Gen Electric Gaseous arc discharge device
US3090884A (en) * 1960-03-07 1963-05-21 Eitel Mccullough Inc Electron gun
US3244000A (en) * 1960-12-20 1966-04-05 Systems Res Lab Inc Ceramic diode pressure transducer and system
US3202866A (en) * 1960-12-23 1965-08-24 Philips Corp Twin-tetrode electron discharge device having two-wire lecher line input and u-shapedmetal strip output means
US3202861A (en) * 1961-02-21 1965-08-24 Rca Corp Electrode support means
US3176186A (en) * 1962-03-22 1965-03-30 Gen Electric Electron discharge devices and circuit component stacked assembly
US3383537A (en) * 1965-10-07 1968-05-14 Rank Organisation Ltd Metal/ceramic cathode ray tube
US3771205A (en) * 1971-03-09 1973-11-13 Sankosha Co Ltd Method of manufacturing a multiple-electrode discharge tube

Also Published As

Publication number Publication date
DE1123050B (de) 1962-02-01
CH336507A (fr) 1959-02-28

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