GB440560A - Cathode ray tube, more particularly for television purposes - Google Patents

Cathode ray tube, more particularly for television purposes

Info

Publication number
GB440560A
GB440560A GB15780/34A GB1578034A GB440560A GB 440560 A GB440560 A GB 440560A GB 15780/34 A GB15780/34 A GB 15780/34A GB 1578034 A GB1578034 A GB 1578034A GB 440560 A GB440560 A GB 440560A
Authority
GB
United Kingdom
Prior art keywords
shoes
pole
ray
tube
envelope
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
GB15780/34A
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.)
Loewe Opta GmbH
Original Assignee
Loewe Opta GmbH
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 Loewe Opta GmbH filed Critical Loewe Opta GmbH
Publication of GB440560A publication Critical patent/GB440560A/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
    • H01J29/76—Deflecting by magnetic fields only
    • 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
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/64—Magnetic lenses
    • H01J29/68—Magnetic lenses using permanent magnets only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/22—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of a single substantially straight conductive element
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
    • Y10S411/918—Threadless nut
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49075—Electromagnet, transformer or inductor including permanent magnet or core
    • Y10T29/49076—From comminuted material

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

440,560. Cathode-ray tubes. RADIOAKT.-GES. D. S. LOEWE, 10, Wiesenweg, Steglitz, Berlin. May 28, 1934, No. 15780. Convention date, May 27, 1933. [Class 39 (i)] Magnetic fields are produced in Braun tubes with picture screens for television &c. by means of pole-shoes inside the evacuated envelope of the tube and a field generator outside the envelope, both extending as close as possible to the envelope to reduce the gap between them and the shoes extending as close as possible to the ray. The magnetic field deflects or concentrates the ray and the pole-shoes may act simultaneously electrostatically to control the intensity of the ray or to concentrate or deflect it. An opposed pair of pole-shoes may deflect the ray horizontally and vertically at the same point along the tube, one deflection being electromagnetic and one electrostatic. The pole-shoes may be layers 3, 4, Fig. 4, of permalloy or steel on an apertured copper diaphragm 16. In a modification, semicircular pole-shoes are separated at each side of a central hole by a copper strip to form an apertured disc anode. For electrostatic concentration of the ray, one side of the pole-shoes is concave. Before reaching the usual deflecting plates, the ray may be given a preliminary constant deflection by passing between two polepieces co-operating with rotatable half-ring magnets 1, Fig. 3, the field of which is varied by adjusting a magnetic shunt consisting of loops 13, 14 joined by a strip 15. The ray from a cathode 18, Fig. 7, is concentrated by the magnetic field between pole-shoes 19, 20 co-operating with a coil 31, is modulated by control potentials applied to the shoes 19, is successively deflected whilst moving at slow and preferably constant speed by the fields of pole-shoes 24, 25 and is finally accelerated by an anode 26. Screens 21, 22 are continued outside the tube and provided with a constant bias. The tube is highly evacuated or gas-filled, preferably at a pressure of 10<-4>-10<-5> mm. To compensate for variations in the anode voltage, the currents through the coils producing the magnetic fields increase with this voltage.
GB15780/34A 1933-05-27 1934-05-28 Cathode ray tube, more particularly for television purposes Expired GB440560A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE440560X 1933-05-27
DE2185138X 1933-07-08

Publications (1)

Publication Number Publication Date
GB440560A true GB440560A (en) 1935-12-30

Family

ID=32070585

Family Applications (2)

Application Number Title Priority Date Filing Date
GB15780/34A Expired GB440560A (en) 1933-05-27 1934-05-28 Cathode ray tube, more particularly for television purposes
GB19947/34A Expired GB440810A (en) 1933-05-27 1934-07-07 Cathode ray tube

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB19947/34A Expired GB440810A (en) 1933-05-27 1934-07-07 Cathode ray tube

Country Status (3)

Country Link
US (2) US2188579A (en)
FR (2) FR773711A (en)
GB (2) GB440560A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2555850A (en) * 1948-01-28 1951-06-05 Nicholas D Glyptis Ion trap
DE764441C (en) * 1937-04-17 1952-12-15 Telefunken Gmbh Cathode ray tubes, in particular for television purposes, with at least one magnetic deflection field
DE948787C (en) * 1951-06-21 1956-09-06 Max Grundig Electron-optical bandwidth control for television pictures reproduced point by point
DE973714C (en) * 1949-02-18 1960-05-19 Pye Ltd Device for centering the electron beam of a cathode ray tube

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB462684A (en) * 1935-09-12 1937-03-12 Alfred Henry Gilbert Improvements in or relating to television and like apparatus
USB385358I5 (en) * 1935-10-31
DE758547C (en) * 1939-02-11 1953-05-26 Telefunken Gmbh Magnetic electron lens
US2425125A (en) * 1940-07-20 1947-08-05 Hartford Nat Bank & Trust Co Cathode-ray tube with magnetic compensating means
BE472659A (en) * 1940-08-02
US2431077A (en) * 1943-08-31 1947-11-18 Rca Corp Cathode-ray tube with revolving magnets and adjustable sleeve
US2442975A (en) * 1943-08-31 1948-06-08 Rca Corp Focusing system
US2433682A (en) * 1944-10-31 1947-12-30 Philco Corp Electron focusing apparatus
US2578342A (en) * 1946-03-15 1951-12-11 Bell Telephone Labor Inc Deflection coil assembly
US2456474A (en) * 1946-07-02 1948-12-14 Gen Electric Electric discharge device
BE480411A (en) * 1947-02-19
US2544934A (en) * 1947-06-14 1951-03-13 Superior Tube Co Ion trap and method of making it
US2575067A (en) * 1948-05-13 1951-11-13 Clarostat Mfg Co Inc Ion trap
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
US2552341A (en) * 1949-02-03 1951-05-08 Clarostat Mfg Co Inc Magnetic structure for use in ion-traps
US2553039A (en) * 1949-04-26 1951-05-15 Zenith Radio Corp Cathode-ray tube combined beam centering and deflection device
US2544898A (en) * 1949-12-31 1951-03-13 Guardian Electric Mfg Co Centering device for beams of cathode-ray tubes
US2586463A (en) * 1950-07-07 1952-02-19 Rca Corp Electron beam deflection system
US2574039A (en) * 1951-02-17 1951-11-06 All Star Products Inc Magnetic centering device for cathode ray tubes
US2619607A (en) * 1951-03-10 1952-11-25 Glaser Steers Corp Internal focusing device
NL170932B (en) * 1951-07-11 B & J Mfg Co DEVICE FOR FITTING AND REMOVING AN OUTER TIRE FROM A VEHICLE WHEEL, EQUIPPED WITH A COMPRESSED AIR SUPPLY CONSTRUCTION FOR AN INNER TIRE.
US2701321A (en) * 1951-07-16 1955-02-01 Sperry Corp Adjustable magnetic focusing system for beam tubes
US2681421A (en) * 1952-03-04 1954-06-15 Gen Electric Magnetic focusing structure for electron beams
US2664514A (en) * 1952-03-10 1953-12-29 All Star Products Inc Magnetic focusing mechanism
US2724021A (en) * 1952-10-06 1955-11-15 Magnescope Corp Cathode ray tube
US2707248A (en) * 1952-11-26 1955-04-26 Rca Corp Electromagnetic beam-convergence systems for tri-color kinescopes
US2965953A (en) * 1953-02-06 1960-12-27 Baermann Max Method of producing permanent magnets
BE527357A (en) * 1953-03-18
NL187895B (en) * 1953-06-17 Feldmuehle Ag DEVICE FOR DEININKING FIBER SUSPENSIONS.
US2769110A (en) * 1954-01-21 1956-10-30 Rca Corp Electron beam control means
US3053939A (en) * 1954-02-23 1962-09-11 Armour Res Found Electromagnetic transducer head
US2985791A (en) * 1958-10-02 1961-05-23 Hughes Aircraft Co Periodically focused severed traveling-wave tube
DE1090777B (en) * 1959-06-11 1960-10-13 Telefunken Gmbh Magnetic correction device for electron beam tubes, especially traveling wave tubes
NL278366A (en) * 1961-05-27
FR1330727A (en) * 1961-07-13 1963-06-28 Electronique & Physique Improvements to oscillograph tubes and similar electronic ray apparatus
US3217200A (en) * 1962-01-23 1965-11-09 Gen Electric Internal magnetic lens for electron beams
NL6510584A (en) * 1965-08-13 1967-02-14
US3694686A (en) * 1970-01-09 1972-09-26 Tokyo Shibaura Electric Co Unidirectional double deflection type cathode ray tube
NL7812540A (en) * 1978-12-27 1980-07-01 Philips Nv CATHED BEAM TUBE.
US5442263A (en) * 1994-08-23 1995-08-15 David Sarnoff Research Center, Inc. Dynamic electrostatic and magnetic focusing apparatus for a cathode ray tube
JP2004259507A (en) * 2003-02-25 2004-09-16 Mitsubishi Electric Corp Cathode-ray tube

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE764441C (en) * 1937-04-17 1952-12-15 Telefunken Gmbh Cathode ray tubes, in particular for television purposes, with at least one magnetic deflection field
US2555850A (en) * 1948-01-28 1951-06-05 Nicholas D Glyptis Ion trap
DE973714C (en) * 1949-02-18 1960-05-19 Pye Ltd Device for centering the electron beam of a cathode ray tube
DE948787C (en) * 1951-06-21 1956-09-06 Max Grundig Electron-optical bandwidth control for television pictures reproduced point by point

Also Published As

Publication number Publication date
US2188579A (en) 1940-01-30
US2185138A (en) 1939-12-26
GB440810A (en) 1936-01-07
FR773711A (en) 1934-11-24
FR44992E (en) 1935-05-01

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