US2537923A - Electric discharge tube - Google Patents

Electric discharge tube Download PDF

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Publication number
US2537923A
US2537923A US663822A US66382246A US2537923A US 2537923 A US2537923 A US 2537923A US 663822 A US663822 A US 663822A US 66382246 A US66382246 A US 66382246A US 2537923 A US2537923 A US 2537923A
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US
United States
Prior art keywords
anode
electrode
primary
electrons
cathode
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
US663822A
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English (en)
Inventor
Adrianus Johannes Wilhel Marie
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 US2537923A publication Critical patent/US2537923A/en
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
    • H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
    • H01J43/02—Tubes in which one or a few electrodes are secondary-electron emitting electrodes

Definitions

  • auxiliary cathode iusually :doesnot .rexcee'd 50 ivol ts .in :.-:order 'rthat the voltage TlGO :be .capplied to the 'itubesshould cnotrbecome tooxhigh. Consequently, in order that the field 'bBtWEBIlIFthE fian- Odfiitlld theaacxilaryicathode shall :have aisulilcient value :the "distance :between them :must the small.
  • thersecondary-remission electrode- is curv-ed. in .the samessense as-the -anode.
  • the tube is particularly suitablez forzuse in so-called lpush-pull-arrangement, sincethe inlet of the 2auxiliarycathode does not carry a highfrequency voltage with respect to the cathode.
  • Figure 1 is a cross-section of the electrode system of a discharge tube comprising an auxiliary cathode which is placed at a small angle relatively to the anode.
  • Figure 2 is a cross-section of the electrode system of a tube, in which the convex side of the anode faces the auxiliary cathode.
  • Figure 3 represents the electrode system of a tube having two cathodes, two anodes and one secondary-emission electrode
  • Figure 1 is a horizontal section of the electrode system in which i denotes the cathode, 2 the control-grld and 3 the screen-grid.
  • the electrons issuing from the cathode are drawn to the aux-' anode to 300.
  • the function of the screens 6 is to convey the primary electrons, at the normal anode voltage, exclusively to the auxiliary cathode.
  • the anode voltage becomes too high for some reason, for instance only or volts too high, the paths of the primary electrons are curved so much stronger that the slower of them find their way directly to the anode. This is represented by dotted lines.
  • Figure 3 is a horizontal cross-section of a pushpull tube.
  • the tube comprises two electrode systems having the auxiliary cathode 4 and the activated parts i in common.
  • the anode associated with each cathode is divided into two parts similarly to the secondary-emission electrode 4. It is also possible, however, to design the secondary-emission electrode and the anode in such a manner that they have circular symmetry normally to th plane of the drawing, so that they are undivided. In this event the cathode and the grids must extend with their axis par allel with the axis of the secondary-emission electrode. cathode are curved in the same sense as the two opposite anodes.
  • the two anodes 5 are interconnected through the primary winding 8 of an output transformer having a secondary winding 9 tc which the load resistance may be connected.
  • the anode voltage is supplied to the centre tapping ll] of the primary winding of the output transformer.
  • An electron discharge tube comprising means to generate a stream of primary electrons directed in a given path, a secondary emissive electrode having its active surface positioned in the path of the primary electrons to intercept said primary electrons whereby secondary" ele'c trons'are emitted therefrom, and an anode electrode having a convex electron collecting surface spaced from and facing said secondary emissive electrode, said convex electron collecting surface
  • An electron discharge tube comprising means to generate a stream of primary electrons directed in a given patn, a secondary emissive electrode having a concave active surface positioned in the path of the primary electrons to intercept said primary electrons whereby secondary electrons are emitted therefrom, and an anode electrode having a convex electron collecting surface spaced from and facing said secondary emissive electrode, said convex collecting surface being positioned outside of said primary electron stream path and portions thereof remote from said primary electron generating means being spaced closer to said secondary emissive electrode than portions thereof adjacent said primary electron stream generating means the spacing between said secondary emise sive electrode and said anode electrode being unobstructed whereby secondary emission from said secondary electrode impinges on the said anode.
  • primary electron stream generating means the spacing between said secondary emissive electrode and said anode electrode being unob: stru-cted whereby secondary emission from said secondary electrode impinges on the said anode.

Landscapes

  • Particle Accelerators (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Discharge Lamp (AREA)
US663822A 1943-02-15 1946-04-22 Electric discharge tube Expired - Lifetime US2537923A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL239640X 1943-02-15

Publications (1)

Publication Number Publication Date
US2537923A true US2537923A (en) 1951-01-09

Family

ID=19780468

Family Applications (1)

Application Number Title Priority Date Filing Date
US663822A Expired - Lifetime US2537923A (en) 1943-02-15 1946-04-22 Electric discharge tube

Country Status (7)

Country Link
US (1) US2537923A (is")
BE (1) BE454404A (is")
CH (1) CH239640A (is")
DE (1) DE856768C (is")
FR (1) FR901951A (is")
GB (1) GB626710A (is")
NL (1) NL59460C (is")

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2670738A (en) * 1952-03-14 1954-03-02 Gibbons Thomas Ear protector
US2674661A (en) * 1948-08-12 1954-04-06 Rca Corp Electron multiplier device
US2675431A (en) * 1949-08-18 1954-04-13 Nat Union Radio Corp Transit time compensated multiplier tube
US2735936A (en) * 1956-02-21 gridley
US2819426A (en) * 1956-04-05 1958-01-07 Rca Corp Electron discharge device
US5990601A (en) * 1971-02-22 1999-11-23 Itt Manufacturing Enterprises, Inc. Electron multiplier and methods and apparatus for processing the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1704155A (en) * 1923-07-27 1929-03-05 Albert G Thomas Vacuum tube
US2037352A (en) * 1929-01-12 1936-04-14 Rca Corp Electronic vacuum tube
US2293417A (en) * 1940-07-27 1942-08-18 Rca Corp Electron beam tube
US2393803A (en) * 1945-01-27 1946-01-29 Rca Corp Method of making long life secondary electron emitters
US2416302A (en) * 1941-01-07 1947-02-25 Bell Telephone Labor Inc Electronic apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1704155A (en) * 1923-07-27 1929-03-05 Albert G Thomas Vacuum tube
US2037352A (en) * 1929-01-12 1936-04-14 Rca Corp Electronic vacuum tube
US2293417A (en) * 1940-07-27 1942-08-18 Rca Corp Electron beam tube
US2416302A (en) * 1941-01-07 1947-02-25 Bell Telephone Labor Inc Electronic apparatus
US2393803A (en) * 1945-01-27 1946-01-29 Rca Corp Method of making long life secondary electron emitters

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735936A (en) * 1956-02-21 gridley
US2674661A (en) * 1948-08-12 1954-04-06 Rca Corp Electron multiplier device
US2675431A (en) * 1949-08-18 1954-04-13 Nat Union Radio Corp Transit time compensated multiplier tube
US2670738A (en) * 1952-03-14 1954-03-02 Gibbons Thomas Ear protector
US2819426A (en) * 1956-04-05 1958-01-07 Rca Corp Electron discharge device
US5990601A (en) * 1971-02-22 1999-11-23 Itt Manufacturing Enterprises, Inc. Electron multiplier and methods and apparatus for processing the same

Also Published As

Publication number Publication date
CH239640A (de) 1945-10-31
DE856768C (de) 1952-11-24
GB626710A (en) 1949-07-20
NL59460C (is")
FR901951A (fr) 1945-08-14
BE454404A (is")

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