US2831136A - Electromagnetic deflecting means - Google Patents

Electromagnetic deflecting means Download PDF

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Publication number
US2831136A
US2831136A US440156A US44015654A US2831136A US 2831136 A US2831136 A US 2831136A US 440156 A US440156 A US 440156A US 44015654 A US44015654 A US 44015654A US 2831136 A US2831136 A US 2831136A
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US
United States
Prior art keywords
deflecting means
coils
electromagnetic
neck
deflecting
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Expired - Lifetime
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US440156A
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English (en)
Inventor
Hanlet Jacques Marie Noel
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Visseaux J SA
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Visseaux J SA
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    • 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
    • H01J29/768—Deflecting by magnetic fields only using printed windings

Definitions

  • the present invention relates to an improved electromagnetic deflecting means and to the manufacture thereof for deflecting with a high degree of efficiency and without any substantial distorting effect the electron beam of a cathode ray tube, it is therefore an object of the invention to provide an electromagnetic deflecting means adapted to cover the entire angle of 360 around the neck oi the cathode ray tube in two halves each covering 180.
  • a further object of the invention is to provide such an improved structure of electromagnetic deflecting means that it may advantageously be manufactured by a so-called printed circuit process.
  • An improved electromagnetic deflecting means is mainly characterised in that it consists of at least one pair of coils each spiralled turns of wire extending over a half cylindrical surface and both so serially connected by their outer respective turns that their directions of coiling are opposite with respect to each other; the spiral turns of each coil are so shaped as to avoid any substantial portion thereof extending both parailel to the axis of the cylindrical surface and to any transverse generatrix of this surface.
  • Fig. 1 schematically shows a conventional arrangement of an electromagnetic deflecting coil means around the neck of a cathode ray tube
  • Fig. 2 schematically shows another known arrangement of such an electromagnetic deflecting means
  • Fig. 3 shows a theoretical development in a flat plane of an electromagnetic deflecting means such as shown in Fig. 1;
  • Figs. 4 and 5 show two forms of actual development in a flat plane of an electromagnetic deflecting means according to the invention
  • Figs. 6 and 7 illustrate diagrams concerning a first method of manufacturing an electromagnetic deflecting means according to the invention
  • Fig.8 illustrates a diagram concerning a second method of manufacturing an electromagnetic deflecting means according to the invention.
  • Fig. 9 at (a), (b) and at (a) ('b) and (a) top rear and cross section views respectively; views of coil elements and their assembly of'such electromagnetic deflecting means in the from of a pile such as shown in Fig. 8, before their application upon the neck of a cathode ray tube.
  • the reference D denotes either the deflection plane or its intersection line with the plane of the drawing
  • the reference H similarly denotes the orthogonal plane thereof, here considered to be a horizontal plane, or its intersection line with the plane of 2,831,136 Patented Apr. 15, 1958 ice the drawing.
  • the deflecting means is supposed to cause the lateral deflection of an electron beam the axis of which is indicated by the line X--X in its rest position.
  • each turn of Wire of the defleeting means is such that it presents two sides parallel to the direction XX and two arcuate sides, each approximately covering l around the neck of the tube, and extending in respective planes orthogonal to axis XX,
  • the longitudinal side 2 of the upper turn of wire and the corresponding side 6 of the lower turn cooperate to form an electromagnetic dipole, through which the deflection control current flows in identical directions.
  • the opposite sides 3 and 7 similarly cooperate but the direction of the current therethrough is the reverse of that of the current through the sides 2 and 6.
  • both the arrangements of Figs. 1 and 2 have substantially the same sensibility factor.
  • the overall efliciency is greater for the arrangement of Fig. 2 since the only useless parts of the turns are of reduced length and the distorting eflect is also reduced at both ends thereof since the wire lengths generating such distorting fields have been reduced.
  • an electromagnetic deflecting means is provided with at least one pair of serially connected spirals of opposite winding direction, the series connection being made by their respective outer turns; this pair of spiralled coils form the deflecting means shown in a developed flat form in Figs. 3 to 5, and more specifically, in order to avoid any loss of deflecting power and any distorting end fields, in the developed flat form of Fig. 5.
  • Fig. 3 the series connection being made by their respective outer turns
  • the spirals consist of rhombic turns of wire having one diagonal extending along the horizontal or axial direction and the other diagonal extending along the orthogonal direction which, when shaped into arcuate form, will be the direction of the circumference of the neck of the cathode ray tube which is to cooperate with such a deflecting means; the span of the di- 3 agonal of each spiral extends transversely to such an extent that it will cover 180 on the neck of the cathode ray tube.
  • Figs. 6 and 7 a spiral of parallelogrammatic turns of wire is first formed upon a flexible insulating backing, such as shown in Fig. 6, and, after insulating its bare metallised face, this product is folded along the oblique line indicated in Fig. 6. The result is the presentation shown in Fig. 7, assuming the insulating backings are translucid.
  • An insulating film may then be formed over the exposed surface of such an element.
  • a thin metallic foil for instance of a copper foil having a thickness of about 7 of a millimeter, is glued upon a plastic material foil alternatively preferably, it is coated with a dielectric plastic film on one of its faces.
  • This may be obtained by spraying an atomised solution of vinyl chloride or methyl-ethyl-cetone over this face.
  • a material or product having a higher melting point such as calcium carbonate, anhydrated alumina, silica powder,
  • the thickness of the dielectric film should or the like. not exceed of one millimeter and constitute a base support of suitable mechanical strength.
  • a single element will suflice to bring a complete electromagnetic deflecting means.
  • the double spiralled coils must be serially interconnected so that the deflecting current after passing through the two spirals of one element, which are serially connected by their structure, passes in the same direction through the next element of the pile.
  • connection points or terminals are shown at 16, 17 for the (a) element, and at 18, 19 for the (b) element.
  • solder paint may be made by painting the terminals with a mixture of rosin and stannic powder, bringing these painted terminals together and heating the paints by means of a soldering iron.
  • insulating films 4 will be burned off at these points.
  • a moderate squeezing is applied to the pile, in the directions indicated by arrows in Fig. 9(a).
  • Fig. 9(a) the file is shown before squeezing.
  • Such an electromagnetic deflecting structure whether consisting of a single element or a piling of such elements, pile may be applied at will around the neck of any cathode ray tube for which it has been designed.
  • the deflecting current passes through the identical but oppositely wound spirals of each and any element, and due to the high efliciency and almost complete distortion, there is obtained a substantially higher degree of uniformity in the controlling magnetic field than with conventional electromagnetic deflecting means.
  • At least one flexible sheeted carrier adapted to extend substantially around said neck and containing at least one pair of oppositely wound fiat spiral coils extending over the carrier surface in juxtaposition; the windings of each coil extending over op posite halves of said neck with the outer windings of said coils being connected in series; and means for applying deflecting current to said coils at the inner windings; at least the greater part of said windings having angles other than zero and with the generatrices of said neck.
  • windings of each coil are of generally rectangular parallelogrammatic shape, one diagonal of the parallelograms being substantially parallel to the generatrices of said cylindrical neck.

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  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Electron Beam Exposure (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
US440156A 1953-09-24 1954-06-29 Electromagnetic deflecting means Expired - Lifetime US2831136A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1002089X 1953-09-24

Publications (1)

Publication Number Publication Date
US2831136A true US2831136A (en) 1958-04-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
US440156A Expired - Lifetime US2831136A (en) 1953-09-24 1954-06-29 Electromagnetic deflecting means

Country Status (5)

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US (1) US2831136A (fr)
BE (1) BE529660A (fr)
DE (1) DE1002089B (fr)
FR (1) FR1090112A (fr)
GB (1) GB787642A (fr)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928014A (en) * 1955-05-02 1960-03-08 Kaiser Ind Corp Electronic device cathode ray tubes
US3007087A (en) * 1958-06-04 1961-10-31 Gen Dynamics Corp Electromagnetic deflection coil
US3111609A (en) * 1959-03-16 1963-11-19 Gen Electric Deflection yoke and method of making
US3118092A (en) * 1956-01-11 1964-01-14 Hazeltine Research Inc Magnetic deflection coils and yokes
US3139566A (en) * 1955-08-25 1964-06-30 Hazeltine Research Inc Construction of magnetic deflection yokes and the like
US3234632A (en) * 1955-08-25 1966-02-15 Hazeltine Research Inc Method of manufacturing magnetic deflection yokes
US3240642A (en) * 1960-01-18 1966-03-15 Zenith Radio Corp Method of printing an electrical component
US3368095A (en) * 1966-07-11 1968-02-06 Rca Corp Four identical printed coils for horizontal and vertical deflection on flexible dielectric
US3466586A (en) * 1966-02-26 1969-09-09 Emi Ltd Scanning coils
US3466580A (en) * 1965-07-30 1969-09-09 Emi Ltd Circuit elements especially for use as scanning coils
US3726004A (en) * 1970-02-20 1973-04-10 Marconi Co Ltd Method of making printed circuit magnetic field coils
JPS4843824A (fr) * 1971-10-07 1973-06-25
JPS4925769B1 (fr) * 1969-09-08 1974-07-03
US3839913A (en) * 1972-07-31 1974-10-08 Fischer & Porter Co Magnetic flowmeter
JPS5086215A (fr) * 1973-11-30 1975-07-11
US3924466A (en) * 1974-10-21 1975-12-09 Honeywell Inc Magnetic flowmeter with improved field coil
US4310821A (en) * 1978-09-08 1982-01-12 Frances Andre L Spiralled printed inductance
US4383233A (en) * 1981-07-24 1983-05-10 Rca Corporation Television deflection yoke
US4639703A (en) * 1985-05-22 1987-01-27 U.S. Philips Corporation Saddle coils for electromagnetic deflection units
US4994015A (en) * 1987-09-14 1991-02-19 Cadwell Industries, Inc. Magnetic stimulator coils
US5078674A (en) * 1989-02-10 1992-01-07 Cadwll Industries, Inc. Magnetic stimulator coils

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1647474A (en) * 1923-10-25 1927-11-01 Frederick W Seymour Variable pathway
US1995376A (en) * 1932-10-29 1935-03-26 Rca Corp Television system
US2237651A (en) * 1937-04-12 1941-04-08 Gen Electric Electronic device
US2239865A (en) * 1937-12-23 1941-04-29 Telefunken Gmbh Cathode ray deflecting coil
US2269678A (en) * 1939-06-02 1942-01-13 Jefferson Electric Co Method of manufacturing coil structures
US2278478A (en) * 1941-01-10 1942-04-07 Bell Telephone Labor Inc Magnetic coil and arrangement utilizing the same
US2324089A (en) * 1941-12-09 1943-07-13 Bell Telephone Labor Inc Electron discharge apparatus
US2400008A (en) * 1943-07-14 1946-05-07 Carter Carburetor Corp Method of forming coils
US2722621A (en) * 1949-10-04 1955-11-01 Hartford Nat Bank & Trust Co Device for deflecting the cathode-ray in cathode-ray tubes
US2771563A (en) * 1950-06-25 1956-11-20 Int Standard Electric Corp Cathode ray deflection coils

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1647474A (en) * 1923-10-25 1927-11-01 Frederick W Seymour Variable pathway
US1995376A (en) * 1932-10-29 1935-03-26 Rca Corp Television system
US2237651A (en) * 1937-04-12 1941-04-08 Gen Electric Electronic device
US2239865A (en) * 1937-12-23 1941-04-29 Telefunken Gmbh Cathode ray deflecting coil
US2269678A (en) * 1939-06-02 1942-01-13 Jefferson Electric Co Method of manufacturing coil structures
US2278478A (en) * 1941-01-10 1942-04-07 Bell Telephone Labor Inc Magnetic coil and arrangement utilizing the same
US2324089A (en) * 1941-12-09 1943-07-13 Bell Telephone Labor Inc Electron discharge apparatus
US2400008A (en) * 1943-07-14 1946-05-07 Carter Carburetor Corp Method of forming coils
US2722621A (en) * 1949-10-04 1955-11-01 Hartford Nat Bank & Trust Co Device for deflecting the cathode-ray in cathode-ray tubes
US2771563A (en) * 1950-06-25 1956-11-20 Int Standard Electric Corp Cathode ray deflection coils

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928014A (en) * 1955-05-02 1960-03-08 Kaiser Ind Corp Electronic device cathode ray tubes
US3139566A (en) * 1955-08-25 1964-06-30 Hazeltine Research Inc Construction of magnetic deflection yokes and the like
US3234632A (en) * 1955-08-25 1966-02-15 Hazeltine Research Inc Method of manufacturing magnetic deflection yokes
US3118092A (en) * 1956-01-11 1964-01-14 Hazeltine Research Inc Magnetic deflection coils and yokes
US3007087A (en) * 1958-06-04 1961-10-31 Gen Dynamics Corp Electromagnetic deflection coil
US3111609A (en) * 1959-03-16 1963-11-19 Gen Electric Deflection yoke and method of making
US3240642A (en) * 1960-01-18 1966-03-15 Zenith Radio Corp Method of printing an electrical component
US3466580A (en) * 1965-07-30 1969-09-09 Emi Ltd Circuit elements especially for use as scanning coils
US3466586A (en) * 1966-02-26 1969-09-09 Emi Ltd Scanning coils
US3368095A (en) * 1966-07-11 1968-02-06 Rca Corp Four identical printed coils for horizontal and vertical deflection on flexible dielectric
JPS4925769B1 (fr) * 1969-09-08 1974-07-03
US3726004A (en) * 1970-02-20 1973-04-10 Marconi Co Ltd Method of making printed circuit magnetic field coils
JPS4843824A (fr) * 1971-10-07 1973-06-25
US3839913A (en) * 1972-07-31 1974-10-08 Fischer & Porter Co Magnetic flowmeter
JPS5086215A (fr) * 1973-11-30 1975-07-11
US3924466A (en) * 1974-10-21 1975-12-09 Honeywell Inc Magnetic flowmeter with improved field coil
US4310821A (en) * 1978-09-08 1982-01-12 Frances Andre L Spiralled printed inductance
US4383233A (en) * 1981-07-24 1983-05-10 Rca Corporation Television deflection yoke
US4639703A (en) * 1985-05-22 1987-01-27 U.S. Philips Corporation Saddle coils for electromagnetic deflection units
US4994015A (en) * 1987-09-14 1991-02-19 Cadwell Industries, Inc. Magnetic stimulator coils
US5078674A (en) * 1989-02-10 1992-01-07 Cadwll Industries, Inc. Magnetic stimulator coils

Also Published As

Publication number Publication date
GB787642A (en) 1957-12-11
DE1002089B (de) 1957-02-07
FR1090112A (fr) 1955-03-28
BE529660A (fr)

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