GB653835A - Cathode arrangement for television tubes - Google Patents

Cathode arrangement for television tubes

Info

Publication number
GB653835A
GB653835A GB14600/47A GB1460047A GB653835A GB 653835 A GB653835 A GB 653835A GB 14600/47 A GB14600/47 A GB 14600/47A GB 1460047 A GB1460047 A GB 1460047A GB 653835 A GB653835 A GB 653835A
Authority
GB
United Kingdom
Prior art keywords
cathode
electrode
target
photo
screen
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
GB14600/47A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB653835A publication Critical patent/GB653835A/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

Landscapes

  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

653,835. Cathode-ray tubes. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. June 2, 1947, No. 14600. Convention date, Jan. 28, 1946. [Class 39 (i)] In a television or like cathode-ray pick-up tube in which a charge image is formed by a photo-electric cathode 2, Fig. 1, on a target electrode 4 which is scanned by an electron beam produced directly or indirectly by an electron gun having a cathode 11, an apertured control electrode 10 and an apertured first anode 7 and wherein the photoelectric cathode 2 is in the line of sight of the said apertures, the incandescent cathode 11 of the electron gun is so constructed and arranged that light therefrom cannot reach the photo-electric cathode 2. This is achieved by arranging the emissive surface 12 of the annular indirectly-heated cathode 11 to face away from screen 4 and by providing a reflecting electrode 17 to reflect the electrons but not light from the cathode back along the axis. Alternatively electrode 17 may be replaced by a secondary emissive electrode, Fig. 2 (not shown), so that the impinging primary electrons generate a beam of secondaries in the opposite direction. The gun includes control electrode 10 and anode 7, the front surface 8 of which serves as the first dynode for multiplying the electrons repelled by target 4, the secondaries from dynode 8 being deflected by " persuader " electrode 20 into the other multiplying stages 9. An accelerating screen electrode 16 is interposed between cathode 11 and reflector electrode 17. Photoelectrons from photo-cathode 2 are accelerated by electrode 3 and impinge on glass target 4 associated with collecting screen 5 and a charge image is built up on target 4. Glass target 4 is translucent and is mounted in grounded metal frame 24, and a decelerating electrode 6 is provided in front thereof. A wall coating 19 is also provided. Vertical and horizontal deflecting coils mounted on frame 21 are adjustable axially by rod 21<SP>1</SP>, and auxiliary coil 22 which is rotationally adjustable serves to centre the beam. Focusing coil 23 is also provided. Specification 634,639 is referred to.
GB14600/47A 1946-01-28 1947-06-02 Cathode arrangement for television tubes Expired GB653835A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US653835XA 1946-01-28 1946-01-28

Publications (1)

Publication Number Publication Date
GB653835A true GB653835A (en) 1951-05-30

Family

ID=22062338

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14600/47A Expired GB653835A (en) 1946-01-28 1947-06-02 Cathode arrangement for television tubes

Country Status (2)

Country Link
US (1) US2563490A (en)
GB (1) GB653835A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2503588A3 (en) * 2008-09-12 2013-08-28 VU1 Corporation Cathodoluminiscent lighting system
CN110783158A (en) * 2019-11-05 2020-02-11 合肥工业大学 Small-sized low-energy grid-control cold cathode electron gun

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2792514A (en) * 1950-12-07 1957-05-14 Rca Corp Orthicon electrode structure
US2975315A (en) * 1957-03-13 1961-03-14 Rauland Corp Cathode-ray tube

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE661621C (en) * 1932-05-08 1938-06-23 Johannes Nienhold Gas or vapor-filled discharge vessel
NL45201C (en) * 1933-06-10
US2211613A (en) * 1936-08-14 1940-08-13 Hygrade Sylvania Corp Cathode ray tube
US2406370A (en) * 1938-07-08 1946-08-27 Univ Leland Stanford Junior Electronic oscillator-detector
US2213174A (en) * 1938-07-30 1940-08-27 Rca Corp Television transmitting tube
US2409224A (en) * 1941-10-23 1946-10-15 Bell Telephone Labor Inc Oscillator
US2365006A (en) * 1942-07-24 1944-12-12 Ricketts Robert Eugene Cathode ray tube and light beam control means
BE475116A (en) * 1944-09-16

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2503588A3 (en) * 2008-09-12 2013-08-28 VU1 Corporation Cathodoluminiscent lighting system
CN110783158A (en) * 2019-11-05 2020-02-11 合肥工业大学 Small-sized low-energy grid-control cold cathode electron gun
CN110783158B (en) * 2019-11-05 2022-06-14 合肥工业大学 Small-sized low-energy grid-control cold cathode electron gun

Also Published As

Publication number Publication date
US2563490A (en) 1951-08-07

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