US2283896A - Cathode structure - Google Patents

Cathode structure Download PDF

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Publication number
US2283896A
US2283896A US399454A US39945441A US2283896A US 2283896 A US2283896 A US 2283896A US 399454 A US399454 A US 399454A US 39945441 A US39945441 A US 39945441A US 2283896 A US2283896 A US 2283896A
Authority
US
United States
Prior art keywords
face
cathode
ribbon
plane
slotted
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
US399454A
Other languages
English (en)
Inventor
Mouromtseff Ilia Emmanuel
George M Dinnick
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.)
CBS Corp
Original Assignee
Westinghouse Electric and Manufacturing 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
Priority to BE473991D priority Critical patent/BE473991A/xx
Application filed by Westinghouse Electric and Manufacturing Co filed Critical Westinghouse Electric and Manufacturing Co
Priority to US399454A priority patent/US2283896A/en
Application granted granted Critical
Publication of US2283896A publication Critical patent/US2283896A/en
Priority to GB8626/42A priority patent/GB556505A/en
Priority to FR947719D priority patent/FR947719A/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/15—Cathodes heated directly by an electric current
    • H01J1/16—Cathodes heated directly by an electric current characterised by the shape

Definitions

  • Another object of our invention is to provide a 10 to 10 'r' i3is'. tThe cfclngrall' porgion cifn this ifibbofi cathode which will produce a plane wave of is forme in o a a pane ace w ic wi electrons. be the electron-emitting portion of the cathode.
  • Another object of the invention is to provide 011 p' a ea in t s od ficat 0f Dhakth ch is p e f withstanding vin'g this plane face Ill the electron emitting por 7 potential differences of the order of thousands tion is to provid a p u a y of ldl a 5f Y'olts kfitweeii iis eiwn potential and the potenb i (g l fage-t liese slcts ay be oi any iasof 0 er sec to es; 7 e nui'n er aii size, 1.1 rom e mm 0 e ciency
  • Another object of our invention isto provide We prefer to limit the material removed from a cathode of sturdy construction in which the thisactive area by hose slots to a ut 0% o active electron-emitting portionis confined to a is -
  • a copious supply of electrons is emitted in plane waves from the surface of this face In.
  • the current then passes around the curved face or fold l4 and thence in a direction to the right through the conductive rear face l6, parallel with the front face I0, and then through the end I8 of the ribbon and out through the standard 20, as indicated by the arrow associated therewith.
  • the magnetic field from the current in the front face ID will be substantially neutralized by the magnetic field from the oppositely flowing current in the rear faces l5 and I6, and it will have little or no effect on the electron flow caused by the magnetic field of the heating current.
  • the cathode is self-supporting and the opposite magnetic fields of the front and rear faces will aid in eliminating from the cathode, a tendency to collapse when heated to the high temperature required for certain installations.
  • FIG. 1 Such an installation is disclosed in Fig. 1 where the cathode has its active face I0 closely spaced in parallel arrangement from a control grid 25.
  • This control grid in this disclosure is supported in parallel arrangement with the cathode face by a plurality of conductive rods 26, symmetrical with the two cathode standards l9 and 20, and these rods are sealed through a cup-shaped casin of insulation 21. sealed to a copper member 28 silver soldered to a disk 29 in turn silver soldered to a hollow body resonator 30 having openings 3
  • a receiving face 34 for the electrons is inside of the hollow body resonator 30, and this face may constitute a portion of a water-cooled electrode 35, which is either separate from or connected to the hollow bodyresonator as desired.
  • Fig. 4 we have illustrated a modification in which the slotted front face It) is the same as in Fig. 2, but the continuation of the ribbon from this front face is curved at into a rear face M parallel to and spaced from the front face.
  • the end tabs 42 and 43 are bent downward on the one side and welded to the conductor or standards I9, 20.
  • the magnetic field of the current in the front face In is more completely neutralized by the magnetic field of the current in the rear face 4
  • the rear cathode structure of Fig. 3 may be modified in a manner similar to that of Fig. 4.
  • a cathode comprising a metal ribbon folded into a plurality of planes and means increasing the electrical resistance of the metal extending between folds thereof in one of said planes to exceed the resistance of the metal comprising said folds.
  • a cathode comprising a metal ribbon folded into a plurality of planes, the portion of the ribbon in one of said planes having slots therein substantially from one fold to another fold and the ribbon at the folds thereof being more conhave the thickness of corresponding portions in the modifications in Fig. 2. This reduced thickductive than at said slotted portion.
  • a cathode comprising a metal ribbon having an active plane slotted face and having continuations of the ribbon from said slotted face which oifer less resistance to current flow than said slotted face, said continuations having portions extending behind and rearward with respect to said slotted face for mounting and current conducting purposes.
  • a cathode comprising a metal ribbon having an active plane slotted face and a rear face parallel to said active plane slotted face, said front and rear faces having different resistance characteristics.
  • a cathode comprising a metal ribbon having an active plane slotted face and a rear face parallel to said active plane slotted face and formed as a continuation thereof and having greater conductivity lengthwise than the lengthwise conductivity of the slotted face, whereby the our- 7 rent in said front face will flow with greater

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US399454A 1941-06-24 1941-06-24 Cathode structure Expired - Lifetime US2283896A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE473991D BE473991A (es) 1941-06-24
US399454A US2283896A (en) 1941-06-24 1941-06-24 Cathode structure
GB8626/42A GB556505A (en) 1941-06-24 1942-06-23 Improvements in or relating to cathode structure
FR947719D FR947719A (fr) 1941-06-24 1947-06-07 Structure de cathode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US399454A US2283896A (en) 1941-06-24 1941-06-24 Cathode structure

Publications (1)

Publication Number Publication Date
US2283896A true US2283896A (en) 1942-05-19

Family

ID=23579565

Family Applications (1)

Application Number Title Priority Date Filing Date
US399454A Expired - Lifetime US2283896A (en) 1941-06-24 1941-06-24 Cathode structure

Country Status (4)

Country Link
US (1) US2283896A (es)
BE (1) BE473991A (es)
FR (1) FR947719A (es)
GB (1) GB556505A (es)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515361A (en) * 1946-12-13 1950-07-18 Bell Telephone Labor Inc Electric discharge device
US2662990A (en) * 1950-09-21 1953-12-15 Collins Radio Co Resnatron filament basket
US2693544A (en) * 1951-12-14 1954-11-02 Collins Radio Co Resnatron filament basket
US2720608A (en) * 1951-03-13 1955-10-11 Wihtol Weltis Cathodes for electron tubes
US2892120A (en) * 1954-10-22 1959-06-23 Gen Electric Cathode structure
US2998544A (en) * 1958-02-28 1961-08-29 Litton Electron Tube Corp Magnetron cathode
US3197669A (en) * 1961-05-12 1965-07-27 Welding Research Inc Electron emitting element for electron gun
US4760306A (en) * 1983-06-10 1988-07-26 The United States Of America As Represented By The United States Department Of Energy Electron emitting filaments for electron discharge devices

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1137688A (fr) * 1954-10-22 1957-06-03 Thomson Houston Comp Francaise Cathode perfectionnée

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515361A (en) * 1946-12-13 1950-07-18 Bell Telephone Labor Inc Electric discharge device
US2662990A (en) * 1950-09-21 1953-12-15 Collins Radio Co Resnatron filament basket
US2720608A (en) * 1951-03-13 1955-10-11 Wihtol Weltis Cathodes for electron tubes
US2693544A (en) * 1951-12-14 1954-11-02 Collins Radio Co Resnatron filament basket
US2892120A (en) * 1954-10-22 1959-06-23 Gen Electric Cathode structure
US2998544A (en) * 1958-02-28 1961-08-29 Litton Electron Tube Corp Magnetron cathode
US3197669A (en) * 1961-05-12 1965-07-27 Welding Research Inc Electron emitting element for electron gun
US4760306A (en) * 1983-06-10 1988-07-26 The United States Of America As Represented By The United States Department Of Energy Electron emitting filaments for electron discharge devices

Also Published As

Publication number Publication date
BE473991A (es)
GB556505A (en) 1943-10-07
FR947719A (fr) 1949-07-11

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