GB500502A - Improvements in cathode-ray tube scanning systems - Google Patents

Improvements in cathode-ray tube scanning systems

Info

Publication number
GB500502A
GB500502A GB32900/37A GB3290037A GB500502A GB 500502 A GB500502 A GB 500502A GB 32900/37 A GB32900/37 A GB 32900/37A GB 3290037 A GB3290037 A GB 3290037A GB 500502 A GB500502 A GB 500502A
Authority
GB
United Kingdom
Prior art keywords
cathode
tube
field
increase
scanned
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
GB32900/37A
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.)
BAE Systems Aerospace Inc
Original Assignee
Hazeltine Corp
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 Hazeltine Corp filed Critical Hazeltine Corp
Publication of GB500502A publication Critical patent/GB500502A/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
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/74—Deflecting by electric fields only

Landscapes

  • Details Of Television Scanning (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

500,502. Cathode-ray tabes. HAZELTINE CORPORATION. Nov. 29, 1937, No. 32900. Convention date, Dec. 24, 1936. [Class 39 (i)] In a cathode-ray tube for television receiving or transmitting systems the aspect ratio of the scanned pattern on a target is varied from what would be obtained by the usual scanning means without otherwise altering the configuration of the scanned pattern ; a refracting field is used which serves to increase the size in one or both directions of the picture obtained so that smaller deflecting currents or voltages are necessary. The beam is deflected by magnetic or electrostatic means to scan a rectangular area at the end of the tube, which may be provided with a fluorescent screen or a photoelectric mosaic. The refracting field comprises magnetic or electrostatic means and in the former case is produced by two permanent magnets 24, 25 arranged at opposite sides of the tube and between the normal deflecting means 20, 21 and the target; the magnets give rise to a field which is zero in a vertical plane through the 'tube axis but increases uniformly on each side of this plane, and is of opposite polarity on each side. The cathode-ray beam is refracted by the field due to these magnets in such a direction as to increase the width of the area scanned, such increase being directly proportional to the deflection. The height of the area scanned may be similarly increased.
GB32900/37A 1936-12-24 1937-11-29 Improvements in cathode-ray tube scanning systems Expired GB500502A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US117458A US2177688A (en) 1936-12-24 1936-12-24 Cathode-ray tube scanning system

Publications (1)

Publication Number Publication Date
GB500502A true GB500502A (en) 1939-02-10

Family

ID=22373053

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32900/37A Expired GB500502A (en) 1936-12-24 1937-11-29 Improvements in cathode-ray tube scanning systems

Country Status (3)

Country Link
US (1) US2177688A (en)
FR (1) FR831209A (en)
GB (1) GB500502A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2425125A (en) * 1940-07-20 1947-08-05 Hartford Nat Bank & Trust Co Cathode-ray tube with magnetic compensating means
BE471546A (en) * 1946-03-02
US2459732A (en) * 1946-03-26 1949-01-18 Philco Corp Electrical system
US2498354A (en) * 1946-12-03 1950-02-21 Philco Corp Magnetic lens system
US2455977A (en) * 1946-12-31 1948-12-14 Philco Corp Magnetic lens for correcting scanning defects
US2552357A (en) * 1948-08-31 1951-05-08 Rca Corp Registration of scanning patterns of cathode-ray tubes
US2541446A (en) * 1949-01-04 1951-02-13 Barnet S Trott Image distortion corrector for cathode-ray tubes
US2499065A (en) * 1949-03-22 1950-02-28 Heppner Mfg Company Device for adjustably positioning spaced magnetic fields
US2553039A (en) * 1949-04-26 1951-05-15 Zenith Radio Corp Cathode-ray tube combined beam centering and deflection device
US2591159A (en) * 1950-05-29 1952-04-01 Gilfillan Bros Inc Magnetic means for producing compensations and other effects in a cathode-ray tube
US2944173A (en) * 1958-07-17 1960-07-05 Hazeltine Research Inc Cathode-ray tube scanning apparatus
US2944174A (en) * 1958-09-18 1960-07-05 Motorola Inc Electronic image system and method
GB1074675A (en) * 1963-10-15 1967-07-05 English Electric Valve Co Ltd Improvements in or relating to cathode ray tubes

Also Published As

Publication number Publication date
US2177688A (en) 1939-10-31
FR831209A (en) 1938-08-26

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