GB480948A - Improvements in or relating to cathode ray tubes - Google Patents

Improvements in or relating to cathode ray tubes

Info

Publication number
GB480948A
GB480948A GB20604/36A GB2060436A GB480948A GB 480948 A GB480948 A GB 480948A GB 20604/36 A GB20604/36 A GB 20604/36A GB 2060436 A GB2060436 A GB 2060436A GB 480948 A GB480948 A GB 480948A
Authority
GB
United Kingdom
Prior art keywords
intercepted
stop
focused
screen
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
GB20604/36A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB20604/36A priority Critical patent/GB480948A/en
Priority to US154147A priority patent/US2181850A/en
Publication of GB480948A publication Critical patent/GB480948A/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

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

480,948. Cathode-ray tubes. NICOLL, F. H. July 25, 1936, No. 20604. [Class 39 (i)] To prevent deterioration of the screen by ion bombardment the beam is so focused by a combination of electrostatic and magnetic fields that the ions and electrons are separated and the former intercepted by a stop or screen. The Figure shows the invention applied to a tube such as that described in Specification 431,327. The beam, after leaving the cathode screen 2 is focused by a magnet coil 3 and passes through a modulator electrode 4 and anode 6 and is later focused by an electrostatic lens formed by the electrode 8. The ion beam takes the form indicated by. the dotted lines and is intercepted by a stop 10, the electron beam proceeding as indicated by the full lines and for the most part escaping the stop. The arrangement may be such that the spread of the ion beam is greater than that of the electron beam and it is intercepted by partitions such as that shown in the end 5 of the anode 6. Specifications 428,525 and 458,270 also are referred to.
GB20604/36A 1936-07-25 1936-07-25 Improvements in or relating to cathode ray tubes Expired GB480948A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB20604/36A GB480948A (en) 1936-07-25 1936-07-25 Improvements in or relating to cathode ray tubes
US154147A US2181850A (en) 1936-07-25 1937-07-17 Cathode ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20604/36A GB480948A (en) 1936-07-25 1936-07-25 Improvements in or relating to cathode ray tubes

Publications (1)

Publication Number Publication Date
GB480948A true GB480948A (en) 1938-02-25

Family

ID=10148678

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20604/36A Expired GB480948A (en) 1936-07-25 1936-07-25 Improvements in or relating to cathode ray tubes

Country Status (2)

Country Link
US (1) US2181850A (en)
GB (1) GB480948A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0106092A1 (en) * 1982-09-10 1984-04-25 Matsushita Electronics Corporation Cathode ray tube
EP0234606A1 (en) * 1986-01-20 1987-09-02 Koninklijke Philips Electronics N.V. Cathode ray tube with ion trap

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2431113A (en) * 1946-07-23 1947-11-18 Rauland Corp Ion filter
US2496127A (en) * 1947-02-05 1950-01-31 Rca Corp Electron gun for cathode-ray tubes
FR956343A (en) * 1947-10-31 1950-01-31
US2555850A (en) * 1948-01-28 1951-06-05 Nicholas D Glyptis Ion trap
US2575067A (en) * 1948-05-13 1951-11-13 Clarostat Mfg Co Inc Ion trap
GB648118A (en) * 1948-11-25 1950-12-28 Frederick Henry Townsend Improvements in or relating to cathode ray tubes with magnetic deflection
US2801361A (en) * 1948-12-10 1957-07-30 Bell Telephone Labor Inc High frequency amplifier
NL143970B (en) * 1948-12-21 Ici Ltd PROCESS FOR PREPARING DISPERSIONS OF SYNTHETIC POLYMERS IN ORGANIC LIQUIDS.
US2522872A (en) * 1949-01-10 1950-09-19 Heppner Mfg Company Device for controlling the path of travel of electrons in cathoderay tubes
US2539156A (en) * 1949-01-19 1951-01-23 Tele Tone Radio Corp Ion trap magnet
US2569517A (en) * 1949-09-09 1951-10-02 Du Mont Allen B Lab Inc Magnet for cathode-ray tube ion traps
US2580355A (en) * 1949-10-08 1951-12-25 Du Mont Allen B Lab Inc Ion trap magnet
US2552342A (en) * 1949-11-17 1951-05-08 Clarostat Mfg Co Inc Magnetic structure for use in ion-traps
NL157537B (en) * 1949-11-25 Calsilox Sa METHOD AND DEVICE FOR FIXING REINFORCEMENT IN A FORM.
US2744208A (en) * 1949-12-02 1956-05-01 Rca Corp Ion trap electron gun
US2596508A (en) * 1950-04-19 1952-05-13 Rauland Corp Electron gun for cathode-ray tubes
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
BE508323A (en) * 1951-01-11
US2707246A (en) * 1952-09-04 1955-04-26 Gen Electric Combination focusing-ion trap structures for cathode-ray tubes
BE548096A (en) * 1953-05-30
US3217200A (en) * 1962-01-23 1965-11-09 Gen Electric Internal magnetic lens for electron beams
US3452241A (en) * 1966-09-06 1969-06-24 Rca Corp Electron gun suitable for electron microscope
US3928784A (en) * 1971-07-02 1975-12-23 Philips Corp Television camera tube with control diaphragm
US4267814A (en) * 1979-12-06 1981-05-19 Federal-Mogul Corporation Abrasive saw blade for trapezoidal grooving
JP4052731B2 (en) * 1998-06-18 2008-02-27 株式会社アドバンテスト Electron gun

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0106092A1 (en) * 1982-09-10 1984-04-25 Matsushita Electronics Corporation Cathode ray tube
EP0234606A1 (en) * 1986-01-20 1987-09-02 Koninklijke Philips Electronics N.V. Cathode ray tube with ion trap

Also Published As

Publication number Publication date
US2181850A (en) 1939-11-28

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