US2736837A - Cathode-ray tube - Google Patents

Cathode-ray tube Download PDF

Info

Publication number
US2736837A
US2736837A US298941A US29894152A US2736837A US 2736837 A US2736837 A US 2736837A US 298941 A US298941 A US 298941A US 29894152 A US29894152 A US 29894152A US 2736837 A US2736837 A US 2736837A
Authority
US
United States
Prior art keywords
grid
cathode
ray tube
voltage
grids
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
US298941A
Other languages
English (en)
Inventor
Perilhou Jean Robert
Jonker Johan Lodewijk Hendrik
Juergens Benno Frederik
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.)
Hartford National Bank and Trust Co
Original Assignee
Hartford National Bank and Trust Co
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 Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
Application granted granted Critical
Publication of US2736837A publication Critical patent/US2736837A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/02—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused
    • H01J31/04—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused with only one or two output electrodes with only two electrically independant groups or electrodes

Definitions

  • the main object of the invention is to provide a cathode-ray tube comprising an electron gun for producing an electronibeam with means for converging the beam to strike particular points on a target.
  • a cathode-ray tube comprising an electron gun, including a cathode and an accelerating anode, and al collecting electrode or target is provided with a pair ofspecial coacting spaced grids mounted between the accelerating anode and thetarget for focussing an electron beam produced by'the electron gun and travelling in substantially parallel lines toward the target.
  • the solid portions of the second grid i. e. the grid furthest from the source of the electron beam, are arranged behind the centers of the apertures formed by the solid portions of the lirst grid.
  • the grids, accelerating anode and target are spaced apart distances and are maintained at potentials at which thel electron beam formed by the electron gun is concentrated into at least one ray in the direction of the target.
  • the potentials applied to the various electrodes are preferably chosen s o that, with a given potential applied to the cathode, the potentials on the grids are greater than that on the cathode and so that the potential on the target is not less than the potential on the grid having the lower potential.
  • cathoderay tubes may now be utilized for the amplification of oscillations, for frequency multiplication, for producing oscillations, for switching arrangements and so forth.
  • Figs. 1 to 4 are simplied diagrammatic views serving to illustrate the principle underlying the invention
  • Fig. r5 is a' View, in cross-sections, of one form of cathode-ray tube according to the invention, together with a portion of the associated circuit arrangement.
  • a pair of spaced grids 2, 3, having parallel wires at right angles to the plane of the drawing, are located in front of a collecting electrode or target 1.
  • the Wires ofthe second grid 3 are arranged behind the centers of the apertures formed by the wires of the rst grid.
  • Thebeam is divided by the two grids'into a number Vof 2,736,837 Patentednlfeb. ,28, 1956l small beams equal to the number of half the meshes of that part of the iirst grid through which the electron beam passes since the small beams vare'produced Ybetween a wire of the iirst grid and a wire of the second grid.
  • Vk is the voltage at the electrode immediately preceding the iirst grid
  • Vg1 is the voltage at the rst grid
  • Vg2 is the voltage at the second grid
  • Vs is the voltage at the collecting electrode
  • l1 is the spacing between the electrode preceding the first' grid and the rst grid
  • k is a constant, the value of which lies between about 2 and 4;
  • v f1 is the focal distance of the lenses formed grid
  • v f2 is the focal distance of the lenses formed bythe second grid.
  • This displacement v may be represented, if the voltages Vgl and V32 do not vary too greatly, by the following equation:
  • the focal points or lines may, of course, be located.; in front of, on or behind the collecting electrode, ,For-

Landscapes

  • Microwave Tubes (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
US298941A 1951-07-28 1952-07-15 Cathode-ray tube Expired - Lifetime US2736837A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2736837X 1951-07-28

Publications (1)

Publication Number Publication Date
US2736837A true US2736837A (en) 1956-02-28

Family

ID=19875511

Family Applications (1)

Application Number Title Priority Date Filing Date
US298941A Expired - Lifetime US2736837A (en) 1951-07-28 1952-07-15 Cathode-ray tube

Country Status (2)

Country Link
US (1) US2736837A (de)
DE (1) DE927458C (de)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2150159A (en) * 1936-03-04 1939-03-14 Bell Telephone Labor Inc Electro-optical system
US2315367A (en) * 1940-07-31 1943-03-30 Rca Corp Cathode-ray tube
US2461515A (en) * 1945-07-16 1949-02-15 Arthur B Bronwell Color television system
US2532511A (en) * 1946-11-16 1950-12-05 Okolicsanyi Ferene Television
US2545325A (en) * 1948-01-30 1951-03-13 Rca Corp Color television receiver
US2573777A (en) * 1947-04-24 1951-11-06 Rca Corp Television system
US2602145A (en) * 1950-08-25 1952-07-01 Rca Corp Control grille assembly for colorkinescopes, etc.
US2606303A (en) * 1951-02-17 1952-08-05 Bramley Jenny Color television tube and process
US2692532A (en) * 1951-04-04 1954-10-26 Chromatic Television Lab Inc Cathode ray focusing apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2150159A (en) * 1936-03-04 1939-03-14 Bell Telephone Labor Inc Electro-optical system
US2315367A (en) * 1940-07-31 1943-03-30 Rca Corp Cathode-ray tube
US2461515A (en) * 1945-07-16 1949-02-15 Arthur B Bronwell Color television system
US2532511A (en) * 1946-11-16 1950-12-05 Okolicsanyi Ferene Television
US2573777A (en) * 1947-04-24 1951-11-06 Rca Corp Television system
US2545325A (en) * 1948-01-30 1951-03-13 Rca Corp Color television receiver
US2602145A (en) * 1950-08-25 1952-07-01 Rca Corp Control grille assembly for colorkinescopes, etc.
US2606303A (en) * 1951-02-17 1952-08-05 Bramley Jenny Color television tube and process
US2692532A (en) * 1951-04-04 1954-10-26 Chromatic Television Lab Inc Cathode ray focusing apparatus

Also Published As

Publication number Publication date
DE927458C (de) 1955-05-09

Similar Documents

Publication Publication Date Title
US2265337A (en) Pulse generating and pulse modulating system
US2503949A (en) Storage tube
US2464562A (en) Discharge tube
US3331985A (en) Character generating system utilizing a cathode ray tube in which a portion of a plurality of electron beams are selectively defocussed to form the character
US3496406A (en) Cathode ray tubes with electron beam deflection amplification
US2214729A (en) Magnetic field neutralizing system
US2563197A (en) Tube with electron velocity compensation
US2223908A (en) Cathode ray tube
US2837689A (en) Post acceleration grid devices
US3497763A (en) Grid to compensate for astigmatic quadrupolar lens
US2176221A (en) Electron discharge apparatus
US2736837A (en) Cathode-ray tube
US2921212A (en) Gun system comprising an ion trap
US1659636A (en) Device fob amplifying voltage and cubeent
US2607903A (en) Distributor tube construction
US2420846A (en) Cathode-ray tube for generating oscillations
US2465342A (en) Electronic discharge device
GB551665A (en) Improvements in cathode ray tubes
US2439504A (en) Flat beam cathode-ray tube and circuit
US2563482A (en) Beam deflection tube with second
US2726353A (en) Electron beam tubes
US3576457A (en) High-resolution direct-view storage tube
US2217197A (en) Cathode ray device
US2748313A (en) Electron beam tube
US2836752A (en) Beam generating system for cathoderay tubes employing an ion trap