GB759944A - Improvements in or relating to electric circuit arrangements incorporating cathode ray tubes - Google Patents

Improvements in or relating to electric circuit arrangements incorporating cathode ray tubes

Info

Publication number
GB759944A
GB759944A GB6093/54A GB609354A GB759944A GB 759944 A GB759944 A GB 759944A GB 6093/54 A GB6093/54 A GB 6093/54A GB 609354 A GB609354 A GB 609354A GB 759944 A GB759944 A GB 759944A
Authority
GB
United Kingdom
Prior art keywords
anode
cathode
modulator
supported
ray tubes
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
GB6093/54A
Inventor
Michael Duke Dudley
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB6093/54A priority Critical patent/GB759944A/en
Priority to US491354A priority patent/US2825837A/en
Publication of GB759944A publication Critical patent/GB759944A/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
    • 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
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/62—Electrostatic lenses
    • H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
    • H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun

Abstract

759,944. Cathode-ray tubes. GENERAL ELECTRIC CO., Ltd. March 2, 1955 [March 2, 1954], No. 6093/54. Class39(l). A cathode-ray tube gun consists of cathode 5, modulator 7, first anode 8 in the form of a plate, second anode 9 with cylindrical aperture of small diameter flaring to a large diameter, and third anode 10. The small diameter portion 18 of second anode 9 is cylindrical or conical and the large diameter part 17 is part spherical. Anode 9 may consist of a block of metal, or of insulating material with a conductive coating, or of sheet metal. Anode 8 is triangular and supported at the corners on the steatite rods 21. The other electrodes are supported by triangular flanges. Anode 10 is connected to a metal coating on the bulb, and may be constituted by the metal coating or may be of plate form. The arrangement is such that with appropriate voltages a first cross-over is formed " near to the first anode " and the first, second and third anodes focus the beam to " a small cross-section which remains substantially constant up to the screen." These expressions are defined in the Specification. With voltages, dimensions and spacings specified in the Specification, it is stated the neck length L is brought down from about the 16 to 18 cms. of a conventional tube to about 12 cms. The change in cathode-modulator spacing on warm up is also given. The cathode is supported within the modulator as described in Specification 499,532.
GB6093/54A 1954-03-02 1954-03-02 Improvements in or relating to electric circuit arrangements incorporating cathode ray tubes Expired GB759944A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB6093/54A GB759944A (en) 1954-03-02 1954-03-02 Improvements in or relating to electric circuit arrangements incorporating cathode ray tubes
US491354A US2825837A (en) 1954-03-02 1955-03-01 Electrostatic focusing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6093/54A GB759944A (en) 1954-03-02 1954-03-02 Improvements in or relating to electric circuit arrangements incorporating cathode ray tubes

Publications (1)

Publication Number Publication Date
GB759944A true GB759944A (en) 1956-10-24

Family

ID=9808245

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6093/54A Expired GB759944A (en) 1954-03-02 1954-03-02 Improvements in or relating to electric circuit arrangements incorporating cathode ray tubes

Country Status (2)

Country Link
US (1) US2825837A (en)
GB (1) GB759944A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2914694A (en) * 1957-10-04 1959-11-24 Rca Corp Cathode assembly
US2935635A (en) * 1957-11-18 1960-05-03 Philco Corp Cathode ray tube display system

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2935636A (en) * 1955-10-31 1960-05-03 Rca Corp Electron gun structure
US2975315A (en) * 1957-03-13 1961-03-14 Rauland Corp Cathode-ray tube
US2914692A (en) * 1958-01-02 1959-11-24 Gen Electric Cathode assembly
US2971118A (en) * 1958-11-10 1961-02-07 Sylvania Electric Prod Electron discharge device
US3249786A (en) * 1962-11-09 1966-05-03 Gen Electric Electron lens
US3374379A (en) * 1964-03-02 1968-03-19 Nippon Columbia Low second grid voltage electron gun
US3394279A (en) * 1967-03-23 1968-07-23 Kentucky Electronics Inc Support and electrical connection for grid cup in electron gun
JPS5522906B2 (en) * 1974-05-20 1980-06-19
US4414485A (en) * 1981-06-23 1983-11-08 Rca Corporation Control-screen electrode subassembly for an electron gun and method for constructing the same
JPS59148242A (en) * 1983-02-14 1984-08-24 Matsushita Electronics Corp Picture tube device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2223040A (en) * 1937-06-30 1940-11-26 Gen Electric Electron discharge device
BE480334A (en) * 1942-03-14
US2355795A (en) * 1942-08-17 1944-08-15 Bell Telephone Labor Inc Electrode system
FR964331A (en) * 1947-04-09 1950-08-10
BE513449A (en) * 1951-08-11

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2914694A (en) * 1957-10-04 1959-11-24 Rca Corp Cathode assembly
US2935635A (en) * 1957-11-18 1960-05-03 Philco Corp Cathode ray tube display system

Also Published As

Publication number Publication date
US2825837A (en) 1958-03-04

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