GB418940A - Improvements in or relating to cathode ray tube apparatus for use in television and like systems - Google Patents

Improvements in or relating to cathode ray tube apparatus for use in television and like systems

Info

Publication number
GB418940A
GB418940A GB33686/33A GB3368633A GB418940A GB 418940 A GB418940 A GB 418940A GB 33686/33 A GB33686/33 A GB 33686/33A GB 3368633 A GB3368633 A GB 3368633A GB 418940 A GB418940 A GB 418940A
Authority
GB
United Kingdom
Prior art keywords
coils
ray
television
cathode
chokes
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
GB33686/33A
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 Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co 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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB418940A publication Critical patent/GB418940A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
    • H04N3/227—Centering
    • 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
    • H01J29/54—Arrangements for centring ray or beam

Abstract

418,940. Cathode-ray tubes; television. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London.-(Assignees of Morlock, W. J. ; 16, Conard Avenue, Collingswood, New Jersey, U.S.A.) Nov. 30, 1933, No. 33686. Convention date, Nov. 30, 1932. [Classes 39 (i) and 40 (iii).] In television &c. apparatus in which a cathode ray is deflected electromagnetically to scan a screen and in which an auxiliary steady deflecting field is provided to adjust the mean position of the ray and so to compensate for errors of alignment in the electron gun, the coils 20, 22, Fig. 2, carrying A.C. to cause the ray to scan the screen are also supplied through chokes 44, 46 with D.C. to produce the auxiliary field. The coils 20, 22 may be arranged in symmetrically opposed pairs on four polepieces on a ring-shaped core surrounding the cathode-ray tube. Rheostats 48, 50 provide adjustment of the D.C. The chokes 44, 46 preventing the flow of A.C. through the D.C. supplies 30<a>, 30<b> may be replaced by condensers at 40, 42 preventing the flow of D.C. in the A.C. supplies. In a modification, Fig. 4, the output valve 60 of the generator 62 of scanning potentials is fed through a choke 58 and feeds A.C. through the deflecting coils 20 and through a condenser 66. The direction and magnitude of the D.C. through the coils 20 is adjusted by a contact 64 on a potentiometer 56, and a separate, similar supply is provided for the other pair of coils 22.
GB33686/33A 1932-11-30 1933-11-30 Improvements in or relating to cathode ray tube apparatus for use in television and like systems Expired GB418940A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US644931A US2007380A (en) 1932-11-30 1932-11-30 Cathode ray apparatus

Publications (1)

Publication Number Publication Date
GB418940A true GB418940A (en) 1934-11-02

Family

ID=24586942

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33686/33A Expired GB418940A (en) 1932-11-30 1933-11-30 Improvements in or relating to cathode ray tube apparatus for use in television and like systems

Country Status (3)

Country Link
US (1) US2007380A (en)
DE (1) DE765692C (en)
GB (1) GB418940A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743024C (en) * 1938-08-06 1943-12-16 Fernseh Gmbh Device for blocking the cathode ray
DE745500C (en) * 1936-06-18 1944-11-25 Arrangement for the magnetic deflection of the beam in a cathode ray tube for television purposes
DE750218C (en) * 1935-10-31 1945-01-04 Rca Corp Device for the electromagnetic deflection of a cathode ray bundle
DE746970C (en) * 1936-06-14 1953-02-23 Lorenz C Ag Circuit for the generation of saw-tooth-shaped currents for the magnetic deflection of Braun tubes
DE972328C (en) * 1937-10-23 1959-07-16 Fernseh Gmbh Arrangement for shifting the grid in television tubes

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL57501C (en) * 1939-08-09
US2559657A (en) * 1942-09-19 1951-07-10 Robert M Page Sweep generation
US2629866A (en) * 1942-09-19 1953-02-24 Robert M Page Position indicating apparatus
US2443025A (en) * 1945-07-30 1948-06-08 Gen Electric Cathode-ray apparatus
GB665096A (en) * 1947-07-31 1952-01-16 Emi Ltd Improvements in or relating to television receiving apparatus
US2561586A (en) * 1948-02-11 1951-07-24 Philco Corp Deflection circuit for cathode-ray tubes
NL81418C (en) * 1950-02-14
BE518287A (en) * 1952-03-10
NL140650B (en) * 1964-02-12 1973-12-17 Hollandse Signaalapparaten Bv DEFLECTION SYSTEM FOR A CATHOD RADIUS TUBE WHICH SYSTEM EQUIPPES EACH DEFLECTION COIL WITH RESISTANT MEANS FOR CANCELLATION OF REMANENT MAGNETISM IN THE FERROMAGNETIC CORE OF THE NORMALITER CRITICALLY MUFFLED.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1613954A (en) * 1923-06-20 1927-01-11 Western Electric Co Sweep circuits for cathode-ray oscillographs
FR747139A (en) * 1931-11-10 1933-06-12 Devices for deflecting electronic currents in cathode ray tubes
AT135287B (en) * 1931-12-12 1933-11-10 Telefunken Gmbh Device for synchronizing cathode ray recorders.
USRE21400E (en) * 1932-04-04 1940-03-19 blumlein

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE750218C (en) * 1935-10-31 1945-01-04 Rca Corp Device for the electromagnetic deflection of a cathode ray bundle
DE746970C (en) * 1936-06-14 1953-02-23 Lorenz C Ag Circuit for the generation of saw-tooth-shaped currents for the magnetic deflection of Braun tubes
DE745500C (en) * 1936-06-18 1944-11-25 Arrangement for the magnetic deflection of the beam in a cathode ray tube for television purposes
DE972328C (en) * 1937-10-23 1959-07-16 Fernseh Gmbh Arrangement for shifting the grid in television tubes
DE743024C (en) * 1938-08-06 1943-12-16 Fernseh Gmbh Device for blocking the cathode ray

Also Published As

Publication number Publication date
US2007380A (en) 1935-07-09
DE765692C (en) 1952-06-05

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