US3757224A - Toroidal yoke and core assembly therefor - Google Patents

Toroidal yoke and core assembly therefor Download PDF

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Publication number
US3757224A
US3757224A US00249390A US3757224DA US3757224A US 3757224 A US3757224 A US 3757224A US 00249390 A US00249390 A US 00249390A US 3757224D A US3757224D A US 3757224DA US 3757224 A US3757224 A US 3757224A
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US
United States
Prior art keywords
slewing
points
core
yoke
wire
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
US00249390A
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English (en)
Inventor
F Fedorko
D Kantner
F Metzler
J Smith
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.)
GTE Sylvania Inc
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GTE Sylvania Inc
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 GTE Sylvania Inc filed Critical GTE Sylvania Inc
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Publication of US3757224A publication Critical patent/US3757224A/en
Assigned to NORTH AMERICAN PHILIPS CONSUMER ELECTRONICS CORP. reassignment NORTH AMERICAN PHILIPS CONSUMER ELECTRONICS CORP. ASSIGNS ITS ENTIRE RIGHT TITLE AND INTEREST, UNDER SAID PATENTS AND APPLICATIONS, SUBJECT TO CONDITIONS AND LICENSES EXISTING AS OF JANUARY 21, 1981. (SEE DOCUMENT FOR DETAILS). Assignors: GTE PRODUCTS CORPORATION A DE CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/08—Winding conductors onto closed formers or cores, e.g. threading conductors through toroidal cores
    • 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
    • H01J29/764—Deflecting by magnetic fields only using toroidal windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/071—Winding coils of special form
    • H01F2041/0711—Winding saddle or deflection coils

Definitions

  • ABSTRACT [22] Filed: May 1, 1972 PP N04 249,390 A toroidal yoke having a modified core which contains projecting slewing points whereby the separate and dis- 52 us. 01. 335/210, 335/213 tine eeile of the Y can he Wound as a single eeih 51 1m. (:1. H0lf 7/00 thus eliminating the need for StopPihg the Winding [58] Field of Search 335/210, 213 ehihe Periedieely during manufacture The single is after formed into a plurality of separate coils by cut- [56] References Cited ting the wire in the proper locations.
  • This invention relates to deflection yokes for cathode ray tubes and more particularly to such yokes which are toroidally wound. Still more particularly, it relates to improvements in the core of the yoke which greatly facilitates winding. It is known to make toroidal deflection yokes for cathode ray tubes; such yokes comprising a hollow, magnetically permeable core having a plurality of coils of wire wound longitudinally thereabout.
  • each of the turns of the coils are substantially parallel to the longitudinal axis of the core.
  • These yokes generally have four distinct and separate coils, two for the horizontal deflection and two for the vertical deflection; however, winding patterns having ten or more coils are known.
  • Such yokes have been semi-automatically wound on a yoke winding machine which basically has a winding head having a closed circular track containing a wire loaded bobbin, the yoke being positioned with the circular track substantially in the center of the core. In operation, the bobbin revolves around the circular track in a vertical plane while the yoke is rotated in a horizontal plane according to a specific wiring or winding pattern.
  • Still another object of the invention is to increase the speed of which such yokes can be wound.
  • a yoke core or body provided with at least two projecting slewing points strategically placed to enable the winding of the yoke as a single coil which can later be separated by proper cutting of the wire into the necessary number of separate and distinct coils.
  • FIG. 1 is a perspective view of one embodiment of the invention
  • FIG. 2 is a perspective view of an alternate embodiment of the invention.
  • FIG. 3 is a perspective illustrating the use of the invention.
  • FIG. 1 a toroidal yoke core 10 of a magnetic permeable material such as ferrite.
  • the yoke core 10 is capable of being wound with a plurality of separate and distinct coils and comprises a frustoconical hollow body 12 having a top 14, a bottom 16 and an angled wall 18.
  • the wall 18 is provided with at least two slewing points 20 which are displaced from one another in predetermined locations.
  • the slewing points 20 are preferably constructed from a nonmagnetic material, and can be attached to wall 18 by any suitable method, such as gluing.
  • the configuration of the slewing points shown is substantially triangular; however, other configurations such as cylindrical can be utilized. It is important, however, that the slewing points have no sharp edges in contact with the wire coil which could scrape the insulation therefrom.
  • FIG. 2 is shown an alternate embodiment of the invention.
  • I-Ierein there is provided a plastic housing 22 which fits over the body 12 of core 10.
  • the housing 22 matches in configuration body 10 and is then constructed in two pieces, an upper piece 24 and a lower piece 26.
  • Upper piece 24 has a flange 28 and an angled wall 30 which fits over wall 18 of body 12.
  • Lower piece 26 is also provided with a flange 32 which fits over bottom 16 of body 12.
  • the two pieces are cemented together with any suitable plastic cement.
  • slewing points 20 project from wall 30. They can be separate pieces cemented into appropriate slots or can be molded as an integral part of the assembly.
  • FIG. 3 is shown a diagrammatic representation of the use of the invention during the winding of the yoke.
  • the arrow indicates the direction of rotation of the yoke core 10 for purposes of this illustration, it being obvious that the rotation is not restricted to this direction.
  • a slew point 20a is provided at the termination of the first coil and when this point is reached the winding operation is halted (this can, of course, be automatically controlled) while the yoke core 10 continues being indexed to the start of the next coil.
  • the wire 34 catches on point 20a and slews around the body of the core substantially transverse to the normal winding direction. When the appropriate location is reached, winding again commences with wire 34 being snubbed about a second slew point 20b which is provided at the beginning of the second coil.
  • a toroidal yoke core capable of being wound with a plurality of separate and distinct wire coils, said core comprising: a substantially frusto-conical body having an inner surface and an outer surface, said outer surface having at least two displaced slewing points incorporated thereon and projecting therefrom.
  • frustoconical body comprises a ferrite material of high magnetic permeability and said slewing points are affixed directly thereto.
  • a toroidal yoke for a cathode ray tube comprising: a frusto-conical magnetic ferrite body; a non-magnetic, similarly shaped covering therefor overlying said body, said covering being provided with at least two displaced apart, projecting slewing points; and a coil formed from a single strand of wire toroidally wound about said covering, said wire at least once contacting a first of said slewing points and radially traversing said covering to a second one of said slewing points.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
US00249390A 1972-05-01 1972-05-01 Toroidal yoke and core assembly therefor Expired - Lifetime US3757224A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24939072A 1972-05-01 1972-05-01

Publications (1)

Publication Number Publication Date
US3757224A true US3757224A (en) 1973-09-04

Family

ID=22943273

Family Applications (1)

Application Number Title Priority Date Filing Date
US00249390A Expired - Lifetime US3757224A (en) 1972-05-01 1972-05-01 Toroidal yoke and core assembly therefor

Country Status (5)

Country Link
US (1) US3757224A (enrdf_load_stackoverflow)
JP (1) JPS4970519A (enrdf_load_stackoverflow)
BE (1) BE798899A (enrdf_load_stackoverflow)
DE (1) DE2321193A1 (enrdf_load_stackoverflow)
FR (1) FR2183095B1 (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3835426A (en) * 1973-10-24 1974-09-10 Gte Sylvania Inc Winding crown for inline gun deflection yoke
US3864637A (en) * 1972-03-10 1975-02-04 Loew Opta Gmbh Frequency regulation of voltage controlled oscillators using clock-driven digital counters
US3875543A (en) * 1973-11-12 1975-04-01 Gen Instrument Corp Toroidal core-coil combination with in situ molded end rings
US4128824A (en) * 1977-09-29 1978-12-05 Rca Corporation Multilayered deflection yoke
US4277767A (en) * 1979-01-26 1981-07-07 Hitachi, Ltd. Deflection yoke
US4754248A (en) * 1984-03-02 1988-06-28 Roddy Belica Deflection yoke having winding retaining notches
US20220148790A1 (en) * 2019-12-13 2022-05-12 Kabushiki Kaisha Toshiba Scanning coil, scanning magnet, and method for manufacturing scanning coil

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5182921A (enrdf_load_stackoverflow) * 1975-01-17 1976-07-21 Nat Jutaku Kenzai
JPS5546453A (en) * 1978-09-30 1980-04-01 Toshiba Corp Deflection yoke
DE4137785A1 (de) * 1991-11-16 1993-05-19 Nokia Deutschland Gmbh Ferritkernhaelften zur vertikalablenkung von elektronenstrahlen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3559899A (en) * 1969-02-24 1971-02-02 Universal Mfg Co Toroidal coil-winding machine for deflection yoke coils for television picture tubes and the like

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3864637A (en) * 1972-03-10 1975-02-04 Loew Opta Gmbh Frequency regulation of voltage controlled oscillators using clock-driven digital counters
US3835426A (en) * 1973-10-24 1974-09-10 Gte Sylvania Inc Winding crown for inline gun deflection yoke
US3875543A (en) * 1973-11-12 1975-04-01 Gen Instrument Corp Toroidal core-coil combination with in situ molded end rings
US4128824A (en) * 1977-09-29 1978-12-05 Rca Corporation Multilayered deflection yoke
US4277767A (en) * 1979-01-26 1981-07-07 Hitachi, Ltd. Deflection yoke
US4754248A (en) * 1984-03-02 1988-06-28 Roddy Belica Deflection yoke having winding retaining notches
US20220148790A1 (en) * 2019-12-13 2022-05-12 Kabushiki Kaisha Toshiba Scanning coil, scanning magnet, and method for manufacturing scanning coil
US12362088B2 (en) * 2019-12-13 2025-07-15 Kabushiki Kaisha Toshiba Scanning coil, scanning magnet, and method for manufacturing scanning coil

Also Published As

Publication number Publication date
BE798899A (fr) 1973-10-30
FR2183095A1 (enrdf_load_stackoverflow) 1973-12-14
JPS4970519A (enrdf_load_stackoverflow) 1974-07-08
FR2183095B1 (enrdf_load_stackoverflow) 1978-08-04
DE2321193A1 (de) 1973-12-13

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Owner name: NORTH AMERICAN PHILIPS CONSUMER ELECTRONICS CORP.,

Free format text: ASSIGNS ITS ENTIRE RIGHT TITLE AND INTEREST, UNDER SAID PATENTS AND APPLICATIONS, SUBJECT TO CONDITIONS AND LICENSES EXISTING AS OF JANUARY 21, 1981.;ASSIGNOR:GTE PRODUCTS CORPORATION A DE CORP.;REEL/FRAME:003992/0284

Effective date: 19810708

Owner name: NORTH AMERICAN PHILIPS CONSUMER ELECTRONICS CORP.

Free format text: ASSIGNS ITS ENTIRE RIGHT TITLE AND INTEREST, UNDER SAID PATENTS AND APPLICATIONS, SUBJECT TO CONDITIONS AND LICENSES EXISTING AS OF JANUARY 21, 1981.;ASSIGNOR:GTE PRODUCTS CORPORATION A DE CORP.;REEL/FRAME:003992/0284

Effective date: 19810708