GB648118A - Improvements in or relating to cathode ray tubes with magnetic deflection - Google Patents

Improvements in or relating to cathode ray tubes with magnetic deflection

Info

Publication number
GB648118A
GB648118A GB30660/48A GB3066048A GB648118A GB 648118 A GB648118 A GB 648118A GB 30660/48 A GB30660/48 A GB 30660/48A GB 3066048 A GB3066048 A GB 3066048A GB 648118 A GB648118 A GB 648118A
Authority
GB
United Kingdom
Prior art keywords
ray tubes
relating
cathode ray
tube
magnetic deflection
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
GB30660/48A
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.)
Heraeus Noblelight Analytics Ltd
Original Assignee
Cathodeon 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 Cathodeon Ltd filed Critical Cathodeon Ltd
Priority to GB30660/48A priority Critical patent/GB648118A/en
Priority to US129232A priority patent/US2583500A/en
Publication of GB648118A publication Critical patent/GB648118A/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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/021—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof arrangements for eliminating interferences in the tube

Abstract

648,118. Cathode-ray tubes. TOWNSEND, F. H., and CATHODEON, Ltd. Nov. 25, 1948, No. 30660. [Class 39 (i)] To ensure that the beam from the electron gun 5-7 passes centrally through the field produced by the deflection coil yoke 10 so as to avoid raster distortions, a diaphragm 13 having a small, accurately-located central aperture 14 is positioned in the tube neck 2 between the focussing and deflecting coils 9, 10, and the electron gun is arranged to produce a widelydivergent beam 12 which is made convergent by the coil 9, the aperture 14 permitting the passage only of that portion of the beam which is coaxial with the tube. The invention is shown applied to a television-receiving tube.
GB30660/48A 1948-11-25 1948-11-25 Improvements in or relating to cathode ray tubes with magnetic deflection Expired GB648118A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB30660/48A GB648118A (en) 1948-11-25 1948-11-25 Improvements in or relating to cathode ray tubes with magnetic deflection
US129232A US2583500A (en) 1948-11-25 1949-11-25 Cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB30660/48A GB648118A (en) 1948-11-25 1948-11-25 Improvements in or relating to cathode ray tubes with magnetic deflection

Publications (1)

Publication Number Publication Date
GB648118A true GB648118A (en) 1950-12-28

Family

ID=10311106

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30660/48A Expired GB648118A (en) 1948-11-25 1948-11-25 Improvements in or relating to cathode ray tubes with magnetic deflection

Country Status (2)

Country Link
US (1) US2583500A (en)
GB (1) GB648118A (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2099749A (en) * 1933-05-30 1937-11-23 Rca Corp Electron tube
US2171766A (en) * 1935-07-09 1939-09-05 Firm Fernseh Ag Means for fastening electrode systems in braun tubes
GB480948A (en) * 1936-07-25 1938-02-25 Frederick Hermes Nicoll Improvements in or relating to cathode ray tubes
US2274586A (en) * 1939-02-25 1942-02-24 Philco Radio & Television Corp Cathode ray tube
US2176947A (en) * 1938-02-15 1939-10-24 John N Anagno Liquid dispensing apparatus
BE440981A (en) * 1940-03-09
BE480334A (en) * 1942-03-14
GB665094A (en) * 1947-04-12 1952-01-16 Ass Elect Ind Improvements relating to the reduction of primary spherical aberration in magnetic electron lenses
US2500455A (en) * 1948-02-18 1950-03-14 Gen Instrument Corp Charged particle deflecting unit employing a permanent magnet

Also Published As

Publication number Publication date
US2583500A (en) 1952-01-22

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