GB766158A - A beam generating system for cathode-ray tubes employing an ion trap - Google Patents

A beam generating system for cathode-ray tubes employing an ion trap

Info

Publication number
GB766158A
GB766158A GB4195/54A GB419554A GB766158A GB 766158 A GB766158 A GB 766158A GB 4195/54 A GB4195/54 A GB 4195/54A GB 419554 A GB419554 A GB 419554A GB 766158 A GB766158 A GB 766158A
Authority
GB
United Kingdom
Prior art keywords
cathode
ion trap
axis
diaphragm
aperture
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
GB4195/54A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB766158A publication Critical patent/GB766158A/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
    • H01J29/84—Traps for removing or diverting unwanted particles, e.g. negative ions, fringing electrons; Arrangements for velocity or mass selection
    • H01J29/845—Traps for removing or diverting unwanted particles, e.g. negative ions, fringing electrons; Arrangements for velocity or mass selection by means of magnetic systems

Landscapes

  • Electron Sources, Ion Sources (AREA)
  • Physical Vapour Deposition (AREA)

Abstract

766,158. Ion-trapping in cathode-ray tubes. STANDARD TELEPHONES & CABLES, Ltd. Feb. 12, 1954 [Feb. 19, 1953], No. 4195/54. Class 39(1). An electron gun system for a C.R.T. comprises a cathode 1 and an electron lens system 3, 4 coaxially arranged, the lens system including a hollow cylindrical ion trap 4 closed at both ends by apertured diaphragms, the centre of the aperture in the diaphragm 5 nearer the cathode 1 being displaced from the axis of the system, in which the diaphragm 5 is curved, e.g. spherically, so as to be convex towards the cathode, the aperture being cut in the curved portion of the diaphragm. The aperture can be in the form of an ellipse, in order to avoid astigmatism, in which the ratio of the major axis to the minor axis lies between 1À14 and 1À16. The major axis of the ellipse can be arranged parallel to a magnetic field transverse to the axis of the system produced by an ion trap magnet.
GB4195/54A 1953-02-19 1954-02-12 A beam generating system for cathode-ray tubes employing an ion trap Expired GB766158A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE766158X 1953-02-19

Publications (1)

Publication Number Publication Date
GB766158A true GB766158A (en) 1957-01-16

Family

ID=6673293

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4195/54A Expired GB766158A (en) 1953-02-19 1954-02-12 A beam generating system for cathode-ray tubes employing an ion trap

Country Status (4)

Country Link
US (1) US2836752A (en)
BE (1) BE526615A (en)
DE (1) DE1073638B (en)
GB (1) GB766158A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579010A (en) * 1968-10-31 1971-05-18 Philco Ford Corp Elongated aperture electron gun structure for flat cathode-ray tube
IT1067949B (en) * 1976-08-27 1985-03-21 Valente D VANE EQUIPMENT SUITABLE FOR CONCRETING THE ROTATION OF THE ROD OF BUTTERFLY VALVES AND SIMILAR
US4075533A (en) * 1976-09-07 1978-02-21 Tektronix, Inc. Electron beam forming structure utilizing an ion trap
FR2613897B1 (en) * 1987-04-10 1990-11-09 Realisations Nucleaires Et DEVICE FOR SUPPRESSING MICRO PROJECTIONS IN A VACUUM ARC ION SOURCE

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733365A (en) * 1956-01-31 hoagland
BE480334A (en) * 1942-03-14
DE838168C (en) * 1944-12-28 1952-03-27 A. C. Cossor Limited, London cathode ray tube
BE470212A (en) * 1946-01-24
NL143970B (en) * 1948-12-21 Ici Ltd PROCESS FOR PREPARING DISPERSIONS OF SYNTHETIC POLYMERS IN ORGANIC LIQUIDS.
US2604599A (en) * 1949-09-17 1952-07-22 Sylvania Electric Prod Cathode-ray tube
NL157537B (en) * 1949-11-25 Calsilox Sa METHOD AND DEVICE FOR FIXING REINFORCEMENT IN A FORM.
NL153273B (en) * 1950-05-02 Bosch Gmbh Robert DRAIN DEVICE FOR THE CONTINUOUS DRAINAGE OF A SUGAR MASS FROM A VACUUM BOILER FOR VAPORING A VISCOUS MASS OF SUGAR.
US2565533A (en) * 1950-05-19 1951-08-28 Rauland Corp Cathode-ray tube
US2562242A (en) * 1950-06-06 1951-07-31 Du Mont Allen B Lab Inc Split anode for bent gun ion trap cathode-ray tubes
FR1021531A (en) * 1950-07-05 1953-02-19 Radiotechnique Improvements to cathode ray tubes
US2673305A (en) * 1951-05-31 1954-03-23 Rauland Corp Image-reproducing device
US2658161A (en) * 1952-01-09 1953-11-03 Rauland Corp Image-reproducing device

Also Published As

Publication number Publication date
BE526615A (en)
US2836752A (en) 1958-05-27
DE1073638B (en) 1960-01-21

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