GB545835A - Improvements in the construction of electrodes for use in electron guns - Google Patents

Improvements in the construction of electrodes for use in electron guns

Info

Publication number
GB545835A
GB545835A GB16253/40A GB1625340A GB545835A GB 545835 A GB545835 A GB 545835A GB 16253/40 A GB16253/40 A GB 16253/40A GB 1625340 A GB1625340 A GB 1625340A GB 545835 A GB545835 A GB 545835A
Authority
GB
United Kingdom
Prior art keywords
cathode
electrode
plates
bars
electrodes
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
Application number
GB16253/40A
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products 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 Electrical Research Products Inc filed Critical Electrical Research Products Inc
Publication of GB545835A publication Critical patent/GB545835A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/48—Analogue computers for specific processes, systems or devices, e.g. simulators
    • G06G7/485—Analogue computers for specific processes, systems or devices, e.g. simulators for determining the trajectory of particles, e.g. of electrons
    • 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
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/62—Electrostatic lenses
    • H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
    • H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/82—Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements
    • 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
    • H01J3/029—Schematic arrangements for beam forming

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Cold Cathode And The Manufacture (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

545,835. Cathode-ray tubes. ELECTRICAL RESEARCH PRODUCTS, Inc. Nov. 8, 1940, Nos. 16253, 16254 and 16255. Convention dates, Dec. 2, 1939, Feb. 17, 1940, and April 4, 1940. [Class 39 (i)] In an electron gun for use in a cathode-ray tube the opposing surfaces of the first accelerator electrode and the modulating electrode or an extension of the cathode surface are correspondingly dished and designed so that the field produced between them has substantially no component at right-angles to normal to the emissive surface at any points in the beam. Formulae and methods of designing the shapes and widths of beam are given. For a cathode, Fig. 13, with concave emissive surface 150 the beam is concentrated by the electrodes 120, 130, the surface 120a on the former flowing from the cathode surface. For a parallel or cylindrical beam the lower surface 52a, Fig. 11, is flat, the cathode may have extensions 44, Fig. 5, in line with the lower surface. To eliminate the divergent effect of the aperture 37a in the upper electrode a grid may be placed across the opening. For a divergent beam a convex cathode 23b, Fig. 7, is used. If the electrode by the cathode is not used for modulation its surface 52, fig. 11, may be an extension ot the cathode ; if used as a modulator its potential should be zero at maximum current. If the potential of the modulator electrode is negative with respect to the cathode its surface if produced would fall behind the cathode. In a further form the cathode surface 73a, Fig. 15, is part of a sphere and is carried with the electrode 74 from a ring 76 ; the accelerator electrode 75 is carried by a second ring 77, both rings being supported by an insulator 78. Baffles 87 are mounted behind the heater 83. The surfaces 74a and 74b on the electrode 74 and the surface 75a on the electrode 75 are formed to give the desired field for the convergent beam. When used with deflector plates one of these may have a flange extending towards the other to stop the beam striking the target when suitably deflected. An electrolytic method of obtaining the correct shapes of the electrodes consists in using an insulator plate 65, Fig. 14, carrying bars 66 and plates 67, 68 the latter deformable ; by connection of the bars and plates to an oscillator 69 and potentiometer 70 potentials may be impressed on the plates, an indicator 71 being in a line tapped to the bars 66.
GB16253/40A 1939-12-02 1940-11-08 Improvements in the construction of electrodes for use in electron guns Expired GB545835A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US307231A US2245581A (en) 1939-12-02 1939-12-02 Electron discharge device

Publications (1)

Publication Number Publication Date
GB545835A true GB545835A (en) 1942-06-16

Family

ID=23188821

Family Applications (2)

Application Number Title Priority Date Filing Date
GB16253/40A Expired GB545835A (en) 1939-12-02 1940-11-08 Improvements in the construction of electrodes for use in electron guns
GB16256/40A Expired GB545689A (en) 1939-12-02 1940-11-08 Improvements relating to the construction and arrangement of electrodes in electron discharge devices

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB16256/40A Expired GB545689A (en) 1939-12-02 1940-11-08 Improvements relating to the construction and arrangement of electrodes in electron discharge devices

Country Status (6)

Country Link
US (6) US2268195A (en)
BE (2) BE444002A (en)
DE (2) DE862640C (en)
FR (2) FR881705A (en)
GB (2) GB545835A (en)
NL (2) NL72884C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977183C (en) * 1953-05-01 1965-05-20 Telefunken Patent Electrostatically strong bundling electron beam generation system

Families Citing this family (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733365A (en) * 1956-01-31 hoagland
BE455024A (en) * 1940-05-02
BE480334A (en) * 1942-03-14
NL83700C (en) * 1942-03-24
US2445077A (en) * 1942-06-25 1948-07-13 Rca Corp Electron discharge device utilizing cavity resonators
NL71647C (en) * 1943-06-30
US2452062A (en) * 1943-07-29 1948-10-26 Raytheon Mfg Co Electrical discharge tube
GB570672A (en) * 1943-08-19 1945-07-17 Gerhard Liebmann Improvements in or relating to cathode ray tubes
US2459792A (en) * 1944-07-08 1949-01-25 Standard Telephones Cables Ltd Beam type electron discharge device
NL69809C (en) * 1946-05-09
US2592242A (en) * 1946-07-02 1952-04-08 Gen Electric Electron gun and mounting therefor
US2488132A (en) * 1946-10-30 1949-11-15 Du Mont Allen B Lab Inc Deflection system for cathode-ray tubes
US2529134A (en) * 1947-10-02 1950-11-07 Rauland Corp Support for electron guns
US2617076A (en) * 1948-01-13 1952-11-04 Motorola Inc Electrostatic deflection system
US2559037A (en) * 1948-02-12 1951-07-03 Zenith Radio Corp Electron discharge device of the focussed-beam type
US2538714A (en) * 1948-04-14 1951-01-16 Hartford Nat Bank & Trust Co Electric discharge tube
US2564743A (en) * 1949-03-15 1951-08-21 Sperry Corp Charged particle beam forming apparatus
US2570124A (en) * 1949-10-20 1951-10-02 Rca Corp Positive ion beam gun
US2606300A (en) * 1950-01-19 1952-08-05 Zenith Radio Corp Electron discharge device
FR1018955A (en) * 1950-05-02 1953-01-15 Philips Brasil Microwave discharge tubes
FR1023290A (en) * 1950-08-12 1953-03-16 Csf Improvements to electron beam focusing devices
US2656481A (en) * 1950-12-13 1953-10-20 Du Mont Allen B Lab Inc Electron gun centering device for cathode-ray tubes
US2672568A (en) * 1951-03-27 1954-03-16 Int Standard Electric Corp Electron gun for cathode-ray tubes
US2797353A (en) * 1951-06-15 1957-06-25 Bell Telephone Labor Inc Traveling wave type electron discharge devices
BE513449A (en) * 1951-08-11
US2740913A (en) * 1951-11-01 1956-04-03 Itt Electron gun
US2741724A (en) * 1951-11-27 1956-04-10 Rauland Corp Image-reproducing device
US2740063A (en) * 1952-02-27 1956-03-27 Hartford Nat Bank & Trust Co Miniature electronic discharge tube with ribbon-shaped beam
US2735032A (en) * 1952-10-09 1956-02-14 bradley
DE1005200B (en) * 1953-03-09 1957-03-28 Loewe Opta Ag Electrode pre-system for electron beam tubes, especially television picture tubes
NL187314B (en) * 1953-05-15 Toyama Chemical Co Ltd ANTIBACTERIAL PREPARATION, AS WELL AS A SUBSTITUTED IN SITE 1 7- (3-AMINOPYRROLIDINO) -6-FLUOR-4-OXO-1,4-DIHYDRO-1,8-NAPHTYRIDINE-3-CARBONIC ACID DERIVATE.
US2728007A (en) * 1953-07-01 1955-12-20 Rca Corp Cathode ray tube gun structure
US2782333A (en) * 1954-08-18 1957-02-19 Rca Corp Shortened triple gun for color television
US2811667A (en) * 1954-12-09 1957-10-29 Hughes Aircraft Co Electron gun
US2888605A (en) * 1955-02-23 1959-05-26 Hughes Aircraft Co Electron gun
US2817033A (en) * 1955-04-08 1957-12-17 Hughes Aircraft Co Electron gun
US2839703A (en) * 1956-01-03 1958-06-17 Columbia Broadcasting Syst Inc High resolution image cathode ray tube system
US2967260A (en) * 1957-05-31 1961-01-03 Eitel Mccullough Inc Electron tube
US2996640A (en) * 1958-11-20 1961-08-15 Rca Corp Variable beam electron gun
DE1498845A1 (en) * 1962-01-31 1969-05-14 Leybold Heraeus Gmbh & Co Kg Ionization device for mass spectrometers that can be used in large total pressure ranges
US3227906A (en) * 1962-05-02 1966-01-04 Eitel Mccullough Inc Cathode support and heat shielding structure for electron gun
FR1413184A (en) * 1964-08-26 1965-10-08 Csf Electronic cannons generating non-uniform density beams
US3980919A (en) * 1974-12-20 1976-09-14 Watkins-Johnson Company Rectangular beam laminar flow electron gun
DE2603341C2 (en) * 1976-01-29 1984-03-15 Siemens AG, 1000 Berlin und 8000 München Rotationally symmetrical electron gun and use for high-performance traveling field tubes
JPS57124830A (en) * 1981-01-27 1982-08-03 Sony Corp Sealing method for cathode-ray tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977183C (en) * 1953-05-01 1965-05-20 Telefunken Patent Electrostatically strong bundling electron beam generation system

Also Published As

Publication number Publication date
FR881705A (en) 1943-05-06
US2268195A (en) 1941-12-30
FR52414E (en) 1944-04-13
NL72884C (en)
DE883938C (en) 1953-06-11
US2245581A (en) 1941-06-17
BE444002A (en)
BE444006A (en)
US2268196A (en) 1941-12-30
NL68166C (en)
US2268197A (en) 1941-12-30
GB545689A (en) 1942-06-08
US2268194A (en) 1941-12-30
US2268165A (en) 1941-12-30
DE862640C (en) 1953-01-12

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