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GB449533A - Improvements in and relating to coils for producing a magnetic field of approximately uniform flux density, for use, for example, with cathode ray tubes - Google Patents

Improvements in and relating to coils for producing a magnetic field of approximately uniform flux density, for use, for example, with cathode ray tubes

Info

Publication number
GB449533A
GB449533A GB3054534A GB3054534A GB449533A GB 449533 A GB449533 A GB 449533A GB 3054534 A GB3054534 A GB 3054534A GB 3054534 A GB3054534 A GB 3054534A GB 449533 A GB449533 A GB 449533A
Authority
GB
United Kingdom
Prior art keywords
coils
coil
right angles
sheath
axis
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
GB3054534A
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.)
MICHAEL BOWMAN MANIFOLD
Original Assignee
MICHAEL BOWMAN MANIFOLD
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
Priority to NL59466D priority Critical patent/NL59466C/xx
Application filed by MICHAEL BOWMAN MANIFOLD filed Critical MICHAEL BOWMAN MANIFOLD
Priority to GB3054534A priority patent/GB449533A/en
Priority to FR796978D priority patent/FR796978A/en
Priority to US46272A priority patent/US2148398A/en
Priority to DEE47533D priority patent/DE763825C/en
Publication of GB449533A publication Critical patent/GB449533A/en
Priority to US99194A priority patent/US2132933A/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
    • H01J29/762—Deflecting by magnetic fields only using saddle coils or printed windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/70—Electron beam control outside the vessel
    • H01J2229/703—Electron beam control outside the vessel by magnetic fields
    • H01J2229/7031—Cores for field producing elements, e.g. ferrite

Landscapes

  • Magnetic Resonance Imaging Apparatus (AREA)
  • Electromagnets (AREA)

Abstract

449,533. Magnet coils. MANIFOLD, M. BOWMAN-, Heatheot, Worplesdon Station, Surrey, and BLUMLEIN, A. D., 32, Audley Road, Ealing, London. Oct. 24, 1934, Nos. 30545/34 and 12052 /35. [Class 35] [See also Group XL] In order to produce a magnetic field uniform over a section at right angles to the lines of force, a coil i: wound to fill the space swept out by a cylindrical or frusto conical surface mov ing through a short distance at right angles to its axis, the term cylindrical in. cluding any surface generated by a line moving so as to be parallel to a fixed straight line and cut a closed plane curve, and similarly for the term frusto-conical. The turns in this space are parallel to the axis of the cone or cylinder and the direction of the current on one side of a plane at right angles to the direction of motion of the axis and bisecting the space is opposite to that on the other. Fig. 4 shows an arrangement of two such coils surrounding a circular cathode-ray tube 3. One coil consists of two parts 7, 8, and the other of two parts 9, 10. The current flows at right angles to the plane of the upper and that in the left hand portion of the coil 7, 8 flows in the opposite direction to that in the right hand portion. An iron sheath 4 surrounding the coils provides a return path for the flux, the end connections lying outside the sheath. This sheath may be dispensed with when the cross-section of the coil is a circle, but is necessary in other cases. The two coils may be of different lengths.
GB3054534A 1934-10-24 1934-10-24 Improvements in and relating to coils for producing a magnetic field of approximately uniform flux density, for use, for example, with cathode ray tubes Expired GB449533A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL59466D NL59466C (en) 1934-10-24
GB3054534A GB449533A (en) 1934-10-24 1934-10-24 Improvements in and relating to coils for producing a magnetic field of approximately uniform flux density, for use, for example, with cathode ray tubes
FR796978D FR796978A (en) 1934-10-24 1935-10-22 Improvements to coils to produce a uniform magnetic field, particularly applicable to cathode ray tubes
US46272A US2148398A (en) 1934-10-24 1935-10-23 Coil for producing a magnetic field of approximately uniform flux density for use, for example, with cathode ray tubes
DEE47533D DE763825C (en) 1934-10-24 1935-10-25 Coil arrangement for generating a magnetic field, which runs homogeneously inside a tubular cavity
US99194A US2132933A (en) 1934-10-24 1936-09-03 Cathode ray tube apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3054534A GB449533A (en) 1934-10-24 1934-10-24 Improvements in and relating to coils for producing a magnetic field of approximately uniform flux density, for use, for example, with cathode ray tubes

Publications (1)

Publication Number Publication Date
GB449533A true GB449533A (en) 1936-06-24

Family

ID=10309303

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3054534A Expired GB449533A (en) 1934-10-24 1934-10-24 Improvements in and relating to coils for producing a magnetic field of approximately uniform flux density, for use, for example, with cathode ray tubes

Country Status (1)

Country Link
GB (1) GB449533A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE741397C (en) * 1938-04-27 1943-11-10 Aeg Magnetic deflection element for Braun cathode ray tubes
DE748909C (en) * 1939-11-17 1944-11-25 Arrangement for the magnetic deflection of cathode rays using coils with a sinusoidal current coating
DE763192C (en) * 1936-10-20 1952-03-06 Emi Ltd Deflection coil system for cathode rays
DE975305C (en) * 1954-05-05 1961-11-02 Philips Nv Deflection coil system for deflecting the electron beam in a cathode ray tube in two directions perpendicular to one another and to the axis of the coil system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE763192C (en) * 1936-10-20 1952-03-06 Emi Ltd Deflection coil system for cathode rays
DE741397C (en) * 1938-04-27 1943-11-10 Aeg Magnetic deflection element for Braun cathode ray tubes
DE748909C (en) * 1939-11-17 1944-11-25 Arrangement for the magnetic deflection of cathode rays using coils with a sinusoidal current coating
DE975305C (en) * 1954-05-05 1961-11-02 Philips Nv Deflection coil system for deflecting the electron beam in a cathode ray tube in two directions perpendicular to one another and to the axis of the coil system

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