GB766005A - Electron discharge devices - Google Patents

Electron discharge devices

Info

Publication number
GB766005A
GB766005A GB27687/53A GB2768753A GB766005A GB 766005 A GB766005 A GB 766005A GB 27687/53 A GB27687/53 A GB 27687/53A GB 2768753 A GB2768753 A GB 2768753A GB 766005 A GB766005 A GB 766005A
Authority
GB
United Kingdom
Prior art keywords
central
cathode
electrons
cross
peripheral portion
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
GB27687/53A
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.)
Space Systems Loral LLC
Original Assignee
Philco Ford Corp
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 Philco Ford Corp filed Critical Philco Ford Corp
Publication of GB766005A publication Critical patent/GB766005A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns
    • H01J29/488—Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
  • Microwave Tubes (AREA)

Abstract

766,005. Cathode-ray tubes. PHILCO CORPORATION. Oct. 8, 1953 [Oct. 9, 1952], No. 27687/53. Class 39(1). In an electron gun of the kind where an apertured control electrode 136, Fig. 6, is closely spaced from the cathode emissive layer 130 and the aperture defines an effective emission arc a (radius r) from which alone electrons can enter the beam, the arc a is divided in a central portion (radius e) and a peripheral portion (radial depth d) of different curvatures, the peripheral portion being "less concave" than the central portion ; by this means the peripheral electrons, which with a flat cathode will form a cross-over before the central electrons, are given a radially outwardly component of velocity relative to the central elevations which causes their cross-over to recede into closer proximity to the central cross-over. In modifications, either the central portion or the peripheral portion may be flat, Figs. 4, 5 (not shown). Electrode 134 has its aperture bevelled at the top to improve the uniformity of the field adjacent the cathode. Twin control electrodes 74, 76, Fig. 2, each facing a separate so-curved emission area, are mounted in an electron gun which is generally of the same construction as is disclosed in Specification 762,550, except that an apertured beam-converging electrode 68 is interposed between the control electrodes and the end of the can 20. Numerical details of dimensions and spacing are given. The gun may be used in a colour-indexing system as in Specification 745,353.
GB27687/53A 1952-10-09 1953-10-08 Electron discharge devices Expired GB766005A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US766005XA 1952-10-09 1952-10-09

Publications (1)

Publication Number Publication Date
GB766005A true GB766005A (en) 1957-01-16

Family

ID=22133057

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27687/53A Expired GB766005A (en) 1952-10-09 1953-10-08 Electron discharge devices

Country Status (2)

Country Link
US (1) US2735032A (en)
GB (1) GB766005A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891183A (en) * 1954-12-17 1959-06-16 Philco Corp Precision dual-beam cathode-ray tube
US2913617A (en) * 1957-03-04 1959-11-17 Gen Electric Electron beam discharge device
US2967260A (en) * 1957-05-31 1961-01-03 Eitel Mccullough Inc Electron tube
US3008064A (en) * 1957-10-28 1961-11-07 Rauland Corp Cathode-ray tube
US3278779A (en) * 1962-05-17 1966-10-11 Rauland Corp Cathode-ray tube having an insulating spacer between the cathode and the control grid
US3363136A (en) * 1966-03-22 1968-01-09 Rauland Corp Thermionic cathodes
US4298818A (en) * 1979-08-29 1981-11-03 Rca Corporation Electron gun
US4414485A (en) * 1981-06-23 1983-11-08 Rca Corporation Control-screen electrode subassembly for an electron gun and method for constructing the same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2006081A (en) * 1934-03-02 1935-06-25 Hanovia Chemical & Mfg Co Electrode for vapor electric devices
NL45873C (en) * 1934-11-08
USB388112I5 (en) * 1935-03-30
US2179083A (en) * 1936-08-08 1939-11-07 Aeg Electron image tube
US2249672A (en) * 1936-12-10 1941-07-15 Gen Electric Discharge device
BE444006A (en) * 1939-12-02
US2308800A (en) * 1941-02-15 1943-01-19 Bell Telephone Labor Inc Electron discharge device
US2633542A (en) * 1948-06-30 1953-03-31 Rca Corp High efficiency nuclear electrostatic generator

Also Published As

Publication number Publication date
US2735032A (en) 1956-02-14

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