US3665597A - Deflection coil assembly - Google Patents

Deflection coil assembly Download PDF

Info

Publication number
US3665597A
US3665597A US75372A US3665597DA US3665597A US 3665597 A US3665597 A US 3665597A US 75372 A US75372 A US 75372A US 3665597D A US3665597D A US 3665597DA US 3665597 A US3665597 A US 3665597A
Authority
US
United States
Prior art keywords
coil body
parallel
section
symmetry
longitudinal 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 - Lifetime
Application number
US75372A
Other languages
English (en)
Inventor
Sing Liong Tan
Mathijs Willem Bartels
Walter Wilhelmus Johann Degger
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.)
US Philips Corp
Original Assignee
US Philips 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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3665597A publication Critical patent/US3665597A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • Y10T29/49071—Electromagnet, transformer or inductor by winding or coiling

Definitions

  • ASSEMBLY This invention relates to a deflection coil assembly particularly for use with a color television camera tube comprising two coils forming together a hollow cylinder or cone.
  • Deflection coils for use in color television, particularly with the camera, in which a separate cathode-ray tube is employed for each of the three fundamental colors, have to meet severe requirements with respect to the relative equality of the deflection coils to be used in one apparatus, for example, for horizontal deflection, in order to avoid display errors. It is known to build up a flat deflection coil from a plurality of nesting rectangular coil portions of progressing size and to bend the coil assembly, baked together in the form of a fairly rigid unit, into the required semi-cylindrical shape. In practice, it is not possible to wind coil portions of normal wire with absolute regularity and, moreover, during the bending operation the coils, having only slight resistance to deformation, are subjected to secondary deformations so that in this way accurately identical coil pairs cannot be obtained.
  • An object of the invention is to provide a structure which does permit of doing so, while it is not necessary to bend the coils into the desired shape subsequent to winding.
  • Thedeflection coil according to the invention is characterized in that the coil assembly is formed from a block of substantially rectangular or trapezoidal windings of a metal foil provided on at least one side with an insulating layer, said block being shaped by machining into the form of a hollow cylinder or cone, the axis of which is parallel to the longer axis of symmetry of said rectangular windings or to the axis of symmetry of the trapezoidal windings.
  • FIG. I shows one embodiment and the method of manufacturing the same in a perspective view
  • FIGS. 2 and 3 show the same embodiment and a variant thereof in an axial view and a side view, respectively, and
  • FIG. 4 shows a second embodiment in a side elevation.
  • FIG. 1 shows a deflection coil assembly 1 made from a block 3 of wound copper foil of, for example, O.l mm thick and, for example, cms wide, said foil preferably being coated on one side or on both sides with thermoplastic insulating lacquer.
  • the foil is wound around a core 5, for example, of wood and, for example, of rectangular section and after winding it is baked in known manner into a solid block which can be machined by chipping tools such as a drilling machine or a lathe.
  • the deflection coil assembly 1 comprises two coils forming together a hollowcylinder, the axis of which is parallel to the longer axis of symmetry 4 of the mainly rectangular windings of the block 3.
  • the deflection coil assembly may be manufactured by boring the initial block 3 in said axial direction, after which the bored block can be fixed to a rotatable mandrel and the block portions shown in FIG. 1 on the left-hand and righthand sides can be sawed off. Subsequently both the outer and inner surfaces of the cylinder may, if desired, be refined on a lathe. Owing to these chipping operations the edges of the foil turns will, in general, be welded together at many places and thus be short-circuited. These short-circuits can be removed by etching the coil in known manner.
  • the coils of the deflection coil assembly 1 of FIG. 1 are connected to each other at one end so that these coils have to be connected in parallel with each other. lfthe two coils also have to be connected in series, two axial saw cuts 7 can be made in the block 3 (in FIG. 2 shown in broken lines) prior to machining thereof, which cuts separate the coils electrically from each other. The sawcuts 7 are then filled out with synthetic resin and the block is further machined in the manner described above.
  • FIG. 4 shows a variant in which the metal foil is wound on a trapezoidal-section core, the resultant block thus havin trapezoidal turns. From the block obtained a deflection cor assembly in the form of a hollow truncated cone can be obtained, the axis of which is parallel to the here unique axis of symmetry9 of the trapezoidal turns of said block.
  • the cross section of the winding mandrel and the inner shape of the bore may deviate slightly, without any objection, from the purely trapezoidal or conical shape, if it is desired for matching the shape of the cathode-ray tubeto be employed, the outer side of which may have a flaring shape. Reaming of such a shape on the lathe does not give rise to difficulties.
  • a method of fabricating a coil assembly composed of two electrically separated coils from a conductive strip of metal foil having a layer of insulating material on one surface thereof which comprises, spirally winding said foil strip about a core shaped so as to form a tubular coil body which, in cross-section, comprises four sides, two opposed sides of which are parallel and the other two opposed sides of which are substantially equal in length and longer than the two parallel sides, baking said coil body, cutting two parallel opposed grooves in the outer surface of the coil body along an axis orthogonal to the long axis of the tubular coil body and parallel to the longitudinal axis of symmetry of the four sided figure in cross-section, machining said coil body so as to form another tubular body of generally cylindrical or conical configuration with its major axis parallel to said longitudinal axis of symmetry, and filling said grooves with a synthetic resin material.
  • machining step includes the step of boring an aperture in said coil body parallel to said longitudinal axis of symmetry.

Landscapes

  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
US75372A 1969-10-03 1970-09-25 Deflection coil assembly Expired - Lifetime US3665597A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6915054A NL6915054A (enrdf_load_stackoverflow) 1969-10-03 1969-10-03

Publications (1)

Publication Number Publication Date
US3665597A true US3665597A (en) 1972-05-30

Family

ID=19808040

Family Applications (1)

Application Number Title Priority Date Filing Date
US75372A Expired - Lifetime US3665597A (en) 1969-10-03 1970-09-25 Deflection coil assembly

Country Status (2)

Country Link
US (1) US3665597A (enrdf_load_stackoverflow)
NL (1) NL6915054A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4127933A (en) * 1976-01-02 1978-12-05 The Boeing Company Method of making work coil for an electromagnetic dent remover
US6578254B2 (en) * 2000-12-08 2003-06-17 Sandia Corporation Damascene fabrication of nonplanar microcoils
US20080074083A1 (en) * 2006-06-26 2008-03-27 Yarger Eric J System and method for storing energy
US20090295253A1 (en) * 2006-06-26 2009-12-03 Battelle Energy Alliance, Llc Motor/generator
US20090295520A1 (en) * 2006-06-26 2009-12-03 Battelle Energy Alliance, Llc Magnetic structure
US20100013345A1 (en) * 2006-06-26 2010-01-21 Battelle Energy Alliance, Llc Bi-metal coil
US20100321146A1 (en) * 2009-06-19 2010-12-23 Delta Electronics, Inc. Coil module

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2167379A (en) * 1936-02-28 1939-07-25 Rca Corp Cathode ray tube deflecting device
US2207777A (en) * 1937-11-16 1940-07-16 Rca Corp Cathode ray deflecting device
US2949593A (en) * 1957-05-09 1960-08-16 Reynolds Metals Co Electrical coil formed from multilayer strip conductor
US3225269A (en) * 1955-01-03 1965-12-21 Willis G Worcester Electrical apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2167379A (en) * 1936-02-28 1939-07-25 Rca Corp Cathode ray tube deflecting device
US2207777A (en) * 1937-11-16 1940-07-16 Rca Corp Cathode ray deflecting device
US3225269A (en) * 1955-01-03 1965-12-21 Willis G Worcester Electrical apparatus
US2949593A (en) * 1957-05-09 1960-08-16 Reynolds Metals Co Electrical coil formed from multilayer strip conductor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4127933A (en) * 1976-01-02 1978-12-05 The Boeing Company Method of making work coil for an electromagnetic dent remover
US6578254B2 (en) * 2000-12-08 2003-06-17 Sandia Corporation Damascene fabrication of nonplanar microcoils
US20080074083A1 (en) * 2006-06-26 2008-03-27 Yarger Eric J System and method for storing energy
US20090295253A1 (en) * 2006-06-26 2009-12-03 Battelle Energy Alliance, Llc Motor/generator
US20090295520A1 (en) * 2006-06-26 2009-12-03 Battelle Energy Alliance, Llc Magnetic structure
US20100013345A1 (en) * 2006-06-26 2010-01-21 Battelle Energy Alliance, Llc Bi-metal coil
US7688036B2 (en) 2006-06-26 2010-03-30 Battelle Energy Alliance, Llc System and method for storing energy
US20100321146A1 (en) * 2009-06-19 2010-12-23 Delta Electronics, Inc. Coil module
US8009009B2 (en) * 2009-06-19 2011-08-30 Delta Electronics, Inc. Coil module

Also Published As

Publication number Publication date
NL6915054A (enrdf_load_stackoverflow) 1971-04-06

Similar Documents

Publication Publication Date Title
US11942261B2 (en) Common-mode choke coil and method of manufacturing common-mode choke coil
US3921041A (en) Dual capacitor
US3665597A (en) Deflection coil assembly
US3466743A (en) Spiral coil comprising a tubular blank with parallel,rectilinear cuts therein
US3042998A (en) Slip ring assembly
US3587019A (en) Scanning coils
US3958328A (en) Method of making a transformer coil assembly
US5852270A (en) Method of manufacturing a miniature quadrupole using electrode-discharge machining
US4011118A (en) Method of manufacturing a coaxial cable, and coaxial cable made by this method
US2228797A (en) Manufacture of telephone cables
US3436812A (en) Method of making the stator core for rotary electric machinery
DE812327C (de) Fokussier-Spulen fuer Kathodenstrahlroehren
US3688394A (en) Method of making a deflection coil
GB1421988A (en) Toroidal deflection yoke having conductors wound in flyback manner
US2910675A (en) Core array using coaxially spaced conductors
US3561111A (en) Method for making precision, square-wire air core coils
US3815069A (en) Process for the manufacture of electrical coils
US3710289A (en) Deflection coil
US4152685A (en) Deflection coil for a cathode ray tube
US4078301A (en) Method of manufacturing a deflection coil for a cathode ray tube
US2153806A (en) Method of forming a heat exchange device
US3820229A (en) Method of joining wire of compound material
US3310763A (en) Deflection yoke coil
US3188587A (en) Dielectric support for the inner conductor of coaxial systems
EP0059003B1 (en) Ferromagnetic yoke for a deflection unit for a television display tube