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GB736343A - Improvements in electric discharge tubes - Google Patents

Improvements in electric discharge tubes

Info

Publication number
GB736343A
GB736343A GB35295/53A GB3529553A GB736343A GB 736343 A GB736343 A GB 736343A GB 35295/53 A GB35295/53 A GB 35295/53A GB 3529553 A GB3529553 A GB 3529553A GB 736343 A GB736343 A GB 736343A
Authority
GB
United Kingdom
Prior art keywords
cylinder
cathode
screen
grid
plate
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
GB35295/53A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB736343A publication Critical patent/GB736343A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/04—Electrodes; Screens
    • H01J17/06—Cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/50—Thermionic-cathode tubes
    • H01J17/52—Thermionic-cathode tubes with one cathode and one anode
    • H01J17/54—Thermionic-cathode tubes with one cathode and one anode having one or more control electrodes
    • H01J17/56—Thermionic-cathode tubes with one cathode and one anode having one or more control electrodes for preventing and then permitting ignition, but thereafter having no control

Landscapes

  • Electron Sources, Ion Sources (AREA)
  • Solid Thermionic Cathode (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

736,343. Thermionic valves. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Dec. 18, 1953 [Dec. 22, 1952], No. 35295/53. Class 39 (1). In a thyratron in which a cylindrical cathode surrounded by a cylindrical screen is separated from a grid electrode having a central gridded portion by a screen electrode in the form of a disc having circumferentially disposed apertures near its edge, the cathode screen is provided with an outwardly flared conical prolongation and a centrally dis. posed plate which together form an electronoptical device for concentrating electrons emanating from the cathode in the apertures in the screen electrode. The tube shown comprises a disc-shaped nickel anode 15 supported from a conductor 16 having a glass coating 14<SP>1</SP> for a large part of its length and passing through a glass screening tube 14 to a metal cap 17. The cathode assembly 18 is supported by two wires 19 and 20 and comprises a cylinder 33 coated with a mixture of alkaline earth oxides heated by a filament helix 34 attached at one end to the cylinder 33 and connected at the other end to a contact pin 12. The cathode heat screen is constituted by two cylinders 35 and 36. Two circular plates 38 and 39 are welded together at their centres and are secured by a strip 37 to the cylinder 36 which is provided with a conical flared portion 36<SP>1</SP>. A grid cylinder 21 of sheet material is supported by wires 26 and 27 and is provided with a continuation in the form of a gauze cylinder 22 closed at its upper end by a plate 23 having a cylindrical extension 24 which is secured to the tube 14 by a clamp 25 having a tightening screw 25<SP>1</SP>. The grid electrode is formed by a plate 28 having a cylindrical edge 28<SP>1</SP> and a central aperture closed by a wire grid 29. Located below the grid electrode 28 is a-screening plate 30 provided with three circumferentially extending apertures 31. The flared portion 361 of the cylinder 36 and the plates 38 and 39 together form an electron-optical system concentrating the electrons emitted by the cathode in the apertures 31 in the grid screening plate 30. The tube is filled with hydrogen at a pressure of a few mm. of mercury.
GB35295/53A 1952-12-22 1953-12-18 Improvements in electric discharge tubes Expired GB736343A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US327220A US2805353A (en) 1952-12-22 1952-12-22 Hydrogen thyratron improvement

Publications (1)

Publication Number Publication Date
GB736343A true GB736343A (en) 1955-09-07

Family

ID=23275639

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35295/53A Expired GB736343A (en) 1952-12-22 1953-12-18 Improvements in electric discharge tubes

Country Status (7)

Country Link
US (1) US2805353A (en)
BE (1) BE525278A (en)
CH (1) CH318061A (en)
DE (1) DE1022325B (en)
FR (1) FR1090274A (en)
GB (1) GB736343A (en)
NL (2) NL91472C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5550430A (en) * 1994-05-16 1996-08-27 Litton Systems, Inc. Gas discharge closing switch with unitary ceramic housing

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB772616A (en) * 1954-07-02 1957-04-17 English Electric Valve Co Ltd Improvements in or relating to gas filled discharge devices
DE1021086B (en) * 1955-07-12 1957-12-19 British Thomson Houston Co Ltd Electric discharge device
NL104217C (en) * 1958-03-13
US3037141A (en) * 1959-05-08 1962-05-29 Ass Elect Ind Electric discharge device
NL272259A (en) * 1961-03-22
US4761794A (en) * 1984-12-22 1988-08-02 English Electric Valve Company Limited Thyratron having thermionic cathode material between anode and control grid
GB8615207D0 (en) * 1986-06-21 1986-07-23 English Electric Valve Co Ltd Thyratrons
CN103681172B (en) * 2012-09-11 2015-12-30 昆山国力真空电器有限公司 For the electron emission assembly of thyratron

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1869829A (en) * 1927-01-03 1932-08-02 Westinghouse Electric & Mfg Co Frequency-responsive crystal relay
AT144865B (en) * 1933-09-01 1936-03-10 Philips Nv Discharge tube with a hot cathode and a lot of liquid material.
US2121591A (en) * 1936-01-10 1938-06-21 Westinghouse Electric & Mfg Co Grid glow tube with zero temperature effect
US2303166A (en) * 1941-01-21 1942-11-24 Bell Telephone Labor Inc Electron discharge device
US2362937A (en) * 1942-09-15 1944-11-14 Bell Telephone Labor Inc Electric discharge device
US2399003A (en) * 1944-10-16 1946-04-23 Gen Electric Electric discharge device
US2518879A (en) * 1945-02-03 1950-08-15 Kenneth J Germeshausen Hydrogen thyratron
US2436265A (en) * 1945-07-27 1948-02-17 Du Mont Allen B Lab Inc Cathode-ray tube
US2497911A (en) * 1945-08-03 1950-02-21 Gerard J Reilly Hydrogen thyratron
US2479529A (en) * 1945-11-23 1949-08-16 Westinghouse Electric Corp Electron discharge device
US2443121A (en) * 1947-06-20 1948-06-08 Rca Corp Grid controlled rectifier tube
US2650998A (en) * 1950-12-29 1953-09-01 Chatham Electronics Corp Baffle structure in gaseous discharge devices
US2653261A (en) * 1951-11-08 1953-09-22 Chatham Electronics Corp Gas discharge device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5550430A (en) * 1994-05-16 1996-08-27 Litton Systems, Inc. Gas discharge closing switch with unitary ceramic housing
GB2301933A (en) * 1994-05-16 1996-12-18 Litton Systems Inc Gas discharge closing switch

Also Published As

Publication number Publication date
NL183759B (en)
NL91472C (en)
BE525278A (en)
FR1090274A (en) 1955-03-29
CH318061A (en) 1956-12-15
DE1022325B (en) 1958-01-09
US2805353A (en) 1957-09-03

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