US2151783A - Secondary electron discharge tube - Google Patents

Secondary electron discharge tube Download PDF

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Publication number
US2151783A
US2151783A US149582A US14958237A US2151783A US 2151783 A US2151783 A US 2151783A US 149582 A US149582 A US 149582A US 14958237 A US14958237 A US 14958237A US 2151783 A US2151783 A US 2151783A
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US
United States
Prior art keywords
cathode
electrode
discharge tube
electron
electron discharge
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
US149582A
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English (en)
Inventor
Lopp Edmund Heinrich
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
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Publication of US2151783A publication Critical patent/US2151783A/en
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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

  • the invention relates to electron discharge tubes which comprise a cathode, one or more control elements, an anode and a so-called secondary emission electrode which is an electrode a beam which is influenced and modulated by the electrode 2 and accelerated by the electrode 3.
  • Secondary electrons emitted by the secondary emission electrode 4 due to bombardment by 5 whose surface may readily emit secondary electhe pimary modulated beams, may flow to the an- 5 trons, and more particularly to the form of ode 5 along the lines indicated by dotted arrows.
  • the anode is not flow of secondary electrons to the anode 5 correlocated in the path of the primary electrons, sponding and magnified variations, which are so that the latter cannot reach it.
  • a variation of the anode voltage brings We claim: about only a slight current variation, so that a 1.
  • An electron discharge tube comprising an high internal resistance is obtained.
  • a control element It is advantageous to utilize a form of con comprising a pair of metal sheets mounted on struction wherein the control and screen element opp sides of said cathode to form a p s a e are in the form of plates or solid elements which for the discharge from said cathode, an accelsurround part of a preferably indirectly heated crating electrode comprising a pair of metal cathode and act as a kind of electron gun, while sheets on opposite sides of and parallel to said the secondary emission electrode is mounted opontrol m n a con y l r mission 20 posite other parts of the cathode in position to electrode in alignment. with the passage between be struck by the beams from the electron gun.
  • An electron discharge tu Comprising a represents diagrammatically in cross section one rectilinear cathode, beam forming means adjaform of construction with the electrodes of a cent said cathode consisting of an equipotential 3o discharge tube arranged according to the inaccelerating electrode comprising a pair of convention.
  • ductors mounted on opposite sides of and parallel
  • l denotes a tubular to said cathode to form the electron discharge indirectly heated cathode inside of which is an from said cathode into an electron beam
  • said insulated heating element 2 and 3 denote a conductors being wider than the diameter of 35 control element and a screen or accelerating elecsaid cathode and spaced to provide for said electrode respectively, each of the duplex type with tron beam an unobstructed passage between two solid parts, such as metal sheets, mounted said conductors of a width as great as the spacon opposite sides of the cathode to form a kind ing between said conductors, a unipotential conof electron gun which produces a modulated trol electrode adjacent said cathode and between 40 beam of primary electrons.
  • a mediate sides of the cathode, which are between secondary electron emitter mounted beyond the the two sheets or parts of the control element 2 ends of said accelerating electrode conductors is located the electrode 4, with the surface exand opposite the passage between said conducposed to the modulated beams coated with a tors and extending across and perpendicular to- 45 secondary electron emission material which the path of said electron beam, and an output readily emits secondary electrons.
  • conductors out of alignment with said passage which is lengthwise of and between the two and outside the path of said electron beam to sheets of the control element, and beyond the said emitter.
  • the primary electrons may flow from the cathode to the secondary emission electrode 4 in EDMUND HEINRICH LoPP.

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  • Discharge Lamp (AREA)
US149582A 1936-06-22 1937-06-22 Secondary electron discharge tube Expired - Lifetime US2151783A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2151783X 1936-06-22

Publications (1)

Publication Number Publication Date
US2151783A true US2151783A (en) 1939-03-28

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ID=19873749

Family Applications (1)

Application Number Title Priority Date Filing Date
US149582A Expired - Lifetime US2151783A (en) 1936-06-22 1937-06-22 Secondary electron discharge tube

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US (1) US2151783A (en:Method)
BE (1) BE422208A (en:Method)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2528437A (en) * 1945-08-04 1950-10-31 Ivan L Joy Multiple anode tube and method of employing the same in testing apparatus
US2553997A (en) * 1948-01-24 1951-05-22 Emi Ltd Thermionic valve utilizing secondary electron emission amplification
US2577164A (en) * 1945-03-20 1951-12-04 Rca Corp Electronic device
US2577454A (en) * 1946-08-22 1951-12-04 Hartford Nat Bank & Trust Co Cavity-resonator tube and associated circuit
US2802127A (en) * 1954-02-03 1957-08-06 Dobischek Dietrich Dynode coating

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577164A (en) * 1945-03-20 1951-12-04 Rca Corp Electronic device
US2528437A (en) * 1945-08-04 1950-10-31 Ivan L Joy Multiple anode tube and method of employing the same in testing apparatus
US2577454A (en) * 1946-08-22 1951-12-04 Hartford Nat Bank & Trust Co Cavity-resonator tube and associated circuit
US2553997A (en) * 1948-01-24 1951-05-22 Emi Ltd Thermionic valve utilizing secondary electron emission amplification
US2802127A (en) * 1954-02-03 1957-08-06 Dobischek Dietrich Dynode coating

Also Published As

Publication number Publication date
BE422208A (en:Method)

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