US3902674A - Core supporting and rotating assembly - Google Patents

Core supporting and rotating assembly Download PDF

Info

Publication number
US3902674A
US3902674A US414189A US41418973A US3902674A US 3902674 A US3902674 A US 3902674A US 414189 A US414189 A US 414189A US 41418973 A US41418973 A US 41418973A US 3902674 A US3902674 A US 3902674A
Authority
US
United States
Prior art keywords
core
assembly
driving element
teeth
supporting
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
US414189A
Other languages
English (en)
Inventor
Wallace M Preston
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.)
Arris Technology Inc
Original Assignee
Arris Technology 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 Arris Technology Inc filed Critical Arris Technology Inc
Priority to US414189A priority Critical patent/US3902674A/en
Priority to CA213,374A priority patent/CA1024491A/en
Priority to JP12858174A priority patent/JPS577460B2/ja
Application granted granted Critical
Publication of US3902674A publication Critical patent/US3902674A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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 A novel core and a novel core supporting and rotating assembly enable a coil of electrical wire to be wound in turns on the core without the use of conventional core supporting clamps, and, if desired, in a continuous operation not requiring an interruption of the winding operation to relocate the core-supporting means to expose the underlying portions of the core for further wrapping.
  • the toroidal core comprises a toroidal body with a central opening and an end ring secured to the lower end thereof, the end ring having an exposed bearing surface for supporting the body and an exposed toothed driving surface for engagement by a correspondingly toothed external driving element.
  • the core supporting and rotating assembly comprises a support having a ring-shaped coresupporting surface adapted to mate with the bearing surface of the core, a toothed driving element engaging the teeth of the exposed driving surface of the core, and means for controllably moving the driving element, thereby to rotate the core.
  • the toothed driving element of the assembly is a rotating gear
  • the portion of the exposed toothed driving surface of the core engaged at one instant by the toothed driving element is in the next instant made available for winding.
  • the resultant toroidal coil-core combination is characterized by indentations in the lower end of the core extending circumferentially around the axis in at least a plurality of sections of indentations.
  • the indentations are of a size and shape such as to drivingly mate with an external driving element having cooperative indentations and have a cross-sectional extent substantially greater than that of the wire turns received therein.
  • Winding machines for the semi-automatic wrapping of a wire coil upon an annular toroidal core commonly consist of a shuttle and a core supporting and rotating assembly.
  • various segment clamps sup portively and rotatively connect sections of the peripheral circumference of the core to the supporting and rotating assembly.
  • the shuttle is a ring-shaped bobbin, connected to a wire conductor supply spool or initially loaded with a quantity of wire conductor drawn from the supply spool, and is oscillated in a direction substantially parallel to the axis of the core so that the wire is deposited in turn along the inner and outer surfaces of the closed toroidal core.
  • the distribution of the turns depends upon a continuous or step-by-step movement of the core about its axis relative to the position of the wire drawn from the shuttle. Even when a full 360 winding of the core circumference is not required, the clamping and unclamping steps at the beginning and end of the wrapping operation are both slow and, at times, injurious to the core structure.
  • the segment clamps Invariably intersect the shuttle orbit. Accordingly, in such cases the winding operation is generally stopped at some point prior to such intersection, the clamps opened, the core relocated (rotated) so that an already wound portion of the circumference is adjacent the clamps, the clamps reclosed, and the winding operation then continued.
  • Such an intermediate manual operation is inconsistent with the desirably automatic nature of the wrapping process, requires expensive manpower, and is perforce a time-consuming and critical step of the process.
  • a toroidal core having a toroidal body and an end ring secured to the lower end thereof, the end ring having an exposed bearing surface for supporting the body and an exposed toothed driving surface for engagement by a correspondingly toothed external driving element.
  • the bearing surface generally includes a downwardly facing supporting surface and a radially facing aligning surface.
  • the toothed driving surface may be either downwardly facing or radially facing.
  • the core supporting and rotating assembly utilized in the winding operation comprises a support having a ring-shaped core-supporting surface adapted to mate with the bearing surface of the core, a toothed driving element engaging the teeth of the exposed toothed driving surface of the core, and means for controllably moving the driving element, thereby to rotate the core.
  • the core-supporting surface is formed of material having a minimal coefficient of friction and comprises an upwardly facing supporting surface and a radially facing aligning surface.
  • the driving element is configured and dimensioned to be received at least in part inside a radially facing aligning surface defined by a vertical projection of the inner periphery of the supporting surface.
  • the driving clement comprises an arm having teeth on an extremity thereof engaging the core teeth, the arm being rotatable about an axis substantially coincident with that of the core, thereby to cause the core to rotate with the arm.
  • the driving element comprises a gear meshing with the core teeth, the gear being rotated by the moving means, thereby to cause the core to rotate in a corresponding manner.
  • the gear may be provided either with axially upwardly extending teeth to mesh with axially downwardly extending core teeth, or with radially extending teeth to mesh with radially extending core teeth.
  • the toroidal coil-core combination comprises a toroidal body having upper and lower ends and a central opening, and a coil comprising turns of wire wound through the central opening and around the body.
  • Indentations in the body at the lower end thereof extend circumferentially around the axis of the core in at least a plurality of sections of indentations, the indentations being of a size and shape such as to drivingly mate with an external driving element having cooperating indentations thereon.
  • the coils extend circumferentially over one or more circumferential portions of the core, and the sections of indentations are located at other circumferential portions of the body.
  • the sections of indentations extend completely around the axis of the body, the wire turns being received in at least some of the indentations and preferably in substantially all of them.
  • the indentations have a cross-sectional extent substantially greater than that of the wire turns received therein, the indentations being adapted to function as gear teeth mating with cooperative gear teeth indentations on the external driving element.
  • FIG. 1 is a fragmentary elevation view, partially in cross-section, of a toroidal core seated on a core supporting and rotating assembly according to the present invention
  • FIG. 2 is a fragmentary planar view of the core taken along the line 22 of FIG. I, with the relative location of one of the shuttle-receiving slots of the support assembly being indicated in phantom line;
  • FIG. 3 is a planar view of the external driving element taken along the line 33 of FIG. 1;
  • FIG. 4 is a fragmentary elevation view, partially in cross-section, of a second embodiment of a toroidal core seated on a core supporting and rotating assembly according to the present invention
  • FIG. 5 is a fragmentary planar view, partially in crosssection, of the core and a portion of the external element taken along the line 5-5 of FIG. 4;
  • FIG. 6 is a planar view, partially in cross-section, of a portion of the external driving element taken along the line 66 of FIG. 4;
  • FIG. 7 is a fragmentary elevation view, partially in cross-section, of a third embodiment of a toroidal core seated on a core supporting and rotating assembly of the present invention.
  • FIG. 8 is a planar view, partially in cross-section, of the core and a portion of the external driving element taken along the line 88 of FIG. 7;
  • FIG. 9 is a planar view, partially in cross-section, of a portion of the external driving element taken along the line 9--9 of FIG. 7.
  • a toroidal core generally designated by the numeral 10 comprising a toroidal body I2 having an upper end 14, a lower end 16, and a central opening 18 therethrough.
  • the body 12 is generally fabricated from any magnetic material such as the ferromagnetic materials of suitable dielectric and permeability characteristics for transformer use, and has the configuration of an annular frustrum of the type frequently utilized in cathode ray tube magnetic deflection yokes (the upper end 14 being the rear of the yoke and the lower end 16 being the front).
  • An end ring generally designated by the numeral 20 is secured to the lower end 16 of the core body 12 for rotation therewith, and has an exposed bearing surface generally designated by the numeral 22 for supporting the core body 12 and an exposed downwardly facing toothed driving surface generally designated by the numeral 24 for engagement by a correspondingly toothed upwardly facing external driving element.
  • Another end ring 32 is typically located at the upper end 14 of the core body 12, both end rings 20, 32 being formed of electrically insulating material and preferably provided with a plurality of axially and/or radially exposed grooves (not shown) to facilitate the receipt and retention of winding turns in predetermined locations.
  • the end rings 20, 32 are typically formed of insulating plastic and may be either independently fabricated or molded in situ as described in Gostyn et al. application U.S. Ser. No. 414,978, filed Nov. 12, I973.
  • the exposed bearing surface generally designated by the numeral 22 has a downwardly facing supporting surface 34 and preferably also a radially facing aligning surface 36.
  • the exposed toothed driving surface generally designated by the numeral 24 is downwardly facing and provided with four sections of indentations 38 defining core teeth 40 along the lower circumferential portion of the end ring 20.
  • the core supporting and rotating assembly generally designated by the numeral comprises a stationary support 5], a movable toothed driving element generally designated by the numeral 52, and means 53 for controllably moving the driving element 52.
  • the stationary support 51 has an upwardly facing ring-shaped core-supporting surface generally designated by the numeral 54, which in turn has an upwardly facing supporting surface 55 adapted to mate with the downwardly facing supporting surface 34 of the end ring bearing surface 22, and preferably also has a radially facing aligning surface 56 adapted to mate with the aligning surface 36 of the end ring bearing surface 22.
  • Surfaces 55 and 56 of the core-supporting surface 54 are desirably formed of material with a minimal coefficient of friction, such as tetrafluoroethylene, to promote non-binding slippage between the rotating core 10 and the stationary support 51.
  • a plurality of circumferential slots or openings A in the support 51 permit passage of the shuttle therethrough during the wrapping process.
  • the toothed driving element 52 in this embodiment comprises a pair of outwardly rotatable arms 57, each having teeth 58 on an extremity thereof engaging the teeth 40 of the core 10 (and, more particularly, of the lower end ring 20).
  • the core teeth 40 of the exposed toothed driving surface 24 of the lower end ring 20 are downwardly extending, and the assembly teeth 58 at the ends of arms 57 of the toothed driving element 30 are upwardly extending, so that when the core 10 is properly positioned on the assembly 50 there is a gravity-induced physical interlock between the assembly teeth 58 and the core teeth 40 to cause the core 10 to rotate with the arms 57.
  • the driving element 52 is mounted on means for controllably moving it, such as the drive shaft 53 of a conventional stepping motor 62 providing a continuous or programmed step-by-step rotational motion.
  • the stepping motor 62 is adapted to rotate the arms 57 about an axis substantially coincident with that of the core 10, rotation of the arms 57 in turn causing rotation of the core 10 by means of engagement between the core teeth 40 and assembly teeth 58.
  • sections of the indentations 38 (and core teeth 40) of the exposed toothed driving surface 24 are preferably situated in areas of the ring circumference which are not to be wound with conductor to eliminate the need for intermediate repositioning of the core 10 on the support assembly 50.
  • a plurality of pairs of sections of indentations 38 are provided on the driving surface 24.
  • the sections of indentations 38 extend on the ring circumference completely about the core axis and the indentations 38 have a cross sectional extent substantially greater than the wire turns to be received therein.
  • the indentations 38 serve both as receivers for the wire turns and as gear teeth for mating with the cooperating gear teeth 58 of the assembly 50.
  • the assembly teeth 58 and the core teeth 40 must be cooperatively designed to insure that the assembly teeth 58 do not injure wire turns received in the indentations 38 when the teeth 58 are engaging the teeth 40 defining such indentations 38, and, coversely, that the wire turns in indentations 38 do not interfere with the engagement of core teeth 40 with assembly teeth 58.
  • the supporting surface 34 of the lower end ring 20 is stabilized in position atop the supporting surface 55 of the support 51 by means of the abutment between radially facing aligning surfaces 36 and 56, the latter comprising a vertical projection or lip at the inner periphery of the supporting surface 55.
  • the abutment of the inwardly facing radial aligning surface 56 of support 51 against the outwardly facing radial aligning surface 36 of the end ring 20 insures concentricitythat is, that the axis of the core is substantially coincident with the axis about which the arms 57 rotate.
  • the length of the arms 57 (including the teeth 58 at the ends thereof) must be such as to permit them to be received at least in part inside the surface 56.
  • the easy drop-in design of the assembly 50 permits rapid and hence economical positioning (and repositioning) of the core 10 thereon.
  • FIGS. 49 therein illustrated are embodiments permitting winding of a full 360 of the circumference of the core end ring automatically and without manual interruption for repositioning of the core 10 on the core supporting and rotating assembly 50.
  • a toroidal core 10 similar to that shown in FIGS. l3 except that the exposed toothed driving surface 24 is beveled and extends over the full circumference of the bottom end of lower end ring 20, and a core supporting and rotating assembly 50, similar to that shown in FIGS. 1-3 except that the toothed driving element 52 comprises a plurality of gears and common shafts.
  • the toothed driving element 52 in this instance represents the connection from the shaft 53 of the stepping motor 62 to the driving surface 24 of the core end ring 20. Continuous or step-by-step rotation of shaft 53 is transmitted, through a driving spur gear 72 fitted on shaft 53, to a pair of driven spur gears 74 and a pair of bevel gears 76 connected for rotation therewith by common shafts 77.
  • An intermediate bevel gear 78 journaled in support 51 is driven by each beveled gear 76, and the teeth 79 of intermediate gears 78 act upon the core teeth 40 to cause rotation of the core 10.
  • the exact torques, gear ratios, drive speeds and the like are matters of choice obvious to those skilled in the art.
  • the rotation of the core 10 results in a change in the engagement between the driving element 52 (as represented by the rotating intermediate bevel gears 78) and the core 10 (as represented by the gear abutting sections of the driving surface 24 of the rotating lower end ring 20).
  • the core circumference portions in the driving area of bevel gears 78 are outside the core circumference portions in which the winding process occurs, the core circumference portions are instant blocked from the winding operation by the abutment thereagainst of the roating bevel gears 78 in the next instant become core circumference portions available for the winding process.
  • the driving surface 24 of the core 10 is disposed on the inner radial surface of the lower end ring 20 (rather than the bottom end thereof) and the driving element 52" comprises a plurality of gears and common shafts.
  • the rotation of the stepping motor shaft 53 is transmitted, through a driving spur gear 72 attached to shaft 53, to a pair of driven spur gears 74 and hence to a pair of small spur gears 86 fixed for rotation therewith on common shafts 88.
  • the teeth 90 of the small spur gears 86 mate with the core teeth 40 of the externally toothed driving surface 24 and cause rotation of the core 10 in such a manner that portions of the core circumference at one instant blocked from the winding process by abutment of the rotating small spur gears 86 thereagainst are in the next instant available for winding.
  • tooth-bearing rotating arms of the assembly engage toothed segments of the core circumference for rotation therewith.
  • This embodiment permits winding of a core without the use of segment clamps, but does require a manual lift-up/drop-in type of repositioning of the core on the core supporting and rotating assembly when a full 360 circumference of the core is to be wound.
  • the other two embodimensts (FIGS. 49) permit winding of a core about a full 360 of its circumference without either the use of segment clamps or a manual repositioning.
  • one or more rotating gears of the assembly successively engage and release segments of an exposed toothed driving surface on the core circumference, the exposed toothed driving surface being downwardly facing (FIGS. 46) or inwardly radially facing (FIGS. 7-9).
  • special aligning surfaces facilitate a drop-in positioning of the core on the assembly and low friction supporting surfaces enable free rotation of the core on the assembly under the influence of the toothed driving element of the assembly.
  • the number of arms 57 will be kept to a minimum (preferably one) and each arm 57 will be of narrow width.
  • the gears 78 and of the driving elements 52' and 52" respectively, be of sufficiently small dimensions as to minimize interference with the movements of the shuttle.
  • the present invention provides a fully automatic winding technique utilizing a novel core and a novel core supporting and rotating assembly which permits winding of the coil in turns upon the core without requiring the use of any segment clamps, and, in the embodiments described in FIGS. 4 thru 9, permits the coil to be wound automatically over the entire circumference of the core without any intermediate clamping or other manual operation.
  • a core supporting and rotating assembly for use with a toroidal core defined by a toroidal body and an end ring secured to one end of said body and having an exposed bearing surface for supporting the core and an exposed toothed driving surface for engagement by a correspondingly toothed driving element for rotating the core, said core supporting and rotating assembly comprising a support having a ring-shaped core supporting surface adapted to mate with the core, a toothed driving element engaging teeth of the exposed toothed driving surface of the core, and means for controllably moving said driving element, thereby to rotate the core.
  • said driving element comprises an arm having teeth on an extremity thereof engaging the core teeth, said arm being rotatable about an axis substantially coincident with that of the core, thereby to cause the core to rotate with said arm.
  • said driving element comprises a gear meshing with the core teeth, said gear being rotated by said moving means, thereby to cause the core to rotate in a corresponding manner.
  • said driving element comprises an arm having teeth on an extremity thereof engaging the core teeth, said arm being rotatable about an axis substantially coincident with that of the core, thereby to cause the core to rotate with said arm.
  • said driving element comprises a gear meshing with the core teeth, said gear being rotated by said moving means, thereby to cause the core to rotate in a corresponding manner.
  • toothed driving element is configured and dimensioned to be received at least in part inside a vertical projection of the inner periphery of said supporting surface.
  • toothed driving element is configured and dimensioned to be received at least in part inside a vertical projection of the inner periphery of said supporting surface.
  • toothed driving element is configured and dimensioned to be received at least in part inside a'vertical projection of the inner periphery of saidsupporting surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Manufacture Of Motors, Generators (AREA)
US414189A 1973-11-09 1973-11-09 Core supporting and rotating assembly Expired - Lifetime US3902674A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US414189A US3902674A (en) 1973-11-09 1973-11-09 Core supporting and rotating assembly
CA213,374A CA1024491A (en) 1973-11-09 1974-11-08 Core supporting and rotating assembly
JP12858174A JPS577460B2 (enrdf_load_stackoverflow) 1973-11-09 1974-11-09

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US414189A US3902674A (en) 1973-11-09 1973-11-09 Core supporting and rotating assembly

Publications (1)

Publication Number Publication Date
US3902674A true US3902674A (en) 1975-09-02

Family

ID=23640340

Family Applications (1)

Application Number Title Priority Date Filing Date
US414189A Expired - Lifetime US3902674A (en) 1973-11-09 1973-11-09 Core supporting and rotating assembly

Country Status (3)

Country Link
US (1) US3902674A (enrdf_load_stackoverflow)
JP (1) JPS577460B2 (enrdf_load_stackoverflow)
CA (1) CA1024491A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101236832B (zh) * 2007-12-05 2010-09-29 中国西电电气股份有限公司 一种端圈的制备工艺
CN103010812A (zh) * 2012-12-02 2013-04-03 云南省玉溪市太标太阳能设备有限公司 太阳能水箱端盖密封胶带粘贴器
CN103117159A (zh) * 2013-02-28 2013-05-22 山东达驰电气有限公司 大型油浸式变压器绝缘端圈及其制作工艺
CN110356937A (zh) * 2019-08-15 2019-10-22 曾华 一种便于缠绕生料带的装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3030038A (en) * 1957-08-26 1962-04-17 Burroughs Corp Toroidal coil winding machines
US3125307A (en) * 1964-03-17 Machine for winding coils in grooves of stator rings
US3446446A (en) * 1965-04-30 1969-05-27 American Enka Corp Tying apparatus for toroidal objects
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
US3601731A (en) * 1970-01-30 1971-08-24 Ibm Coil form for a magnetic deflection york

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS524017B2 (enrdf_load_stackoverflow) * 1972-04-21 1977-02-01
JPS49146824U (enrdf_load_stackoverflow) * 1973-04-16 1974-12-18

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125307A (en) * 1964-03-17 Machine for winding coils in grooves of stator rings
US3030038A (en) * 1957-08-26 1962-04-17 Burroughs Corp Toroidal coil winding machines
US3446446A (en) * 1965-04-30 1969-05-27 American Enka Corp Tying apparatus for toroidal objects
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
US3601731A (en) * 1970-01-30 1971-08-24 Ibm Coil form for a magnetic deflection york

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101236832B (zh) * 2007-12-05 2010-09-29 中国西电电气股份有限公司 一种端圈的制备工艺
CN103010812A (zh) * 2012-12-02 2013-04-03 云南省玉溪市太标太阳能设备有限公司 太阳能水箱端盖密封胶带粘贴器
CN103010812B (zh) * 2012-12-02 2015-12-23 云南省玉溪市太标太阳能设备有限公司 太阳能水箱端盖密封胶带粘贴器
CN103117159A (zh) * 2013-02-28 2013-05-22 山东达驰电气有限公司 大型油浸式变压器绝缘端圈及其制作工艺
CN103117159B (zh) * 2013-02-28 2016-03-02 山东达驰电气有限公司 大型油浸式变压器绝缘端圈及其制作工艺
CN110356937A (zh) * 2019-08-15 2019-10-22 曾华 一种便于缠绕生料带的装置

Also Published As

Publication number Publication date
CA1024491A (en) 1978-01-17
JPS577460B2 (enrdf_load_stackoverflow) 1982-02-10
JPS5078858A (enrdf_load_stackoverflow) 1975-06-26

Similar Documents

Publication Publication Date Title
DE2841137A1 (de) Plattenspieler
US3902674A (en) Core supporting and rotating assembly
JP2701441B2 (ja) フィールドコイルの巻線機
US3985163A (en) Apparatus and method for forming circular dynamoelectric machine field windings by pushing
US3531749A (en) Rotor structure
US2441439A (en) Method and machine for winding coils
US3753342A (en) Apparatus for winding up wire, strand, cable or the like
GB1477515A (en) Apparatus for winding toroidal deflection coils
US3985164A (en) Apparatus and method for forming circular dynamoelectric machine field windings by pushing
JPS5567971A (en) Arm driver of player
US4079895A (en) Device for winding toroidal deflection coils
US3980242A (en) Coil winding machine for toroidal cores employing core holder assembly
US5028905A (en) High voltage coil having split plastic tubes
US2221687A (en) Transformer assembling method and apparatus
US4038621A (en) Precision vertical deflection coil for a hybrid television yoke
US3125307A (en) Machine for winding coils in grooves of stator rings
US1832427A (en) Method of and machine for winding flat spiral coils
EP0262718B1 (en) Method of manufacturing a deflection unit for a cathode ray tube
CN218507285U (zh) 一种线缆打盘机的线盘调节装置
US4730777A (en) Method and apparatus for winding ring cores, ring coils, ring core parts or ring coil parts
US4339872A (en) Apparatus and method for winding armatures
JPS6314575B2 (enrdf_load_stackoverflow)
US2387570A (en) Distributing control device
US4921178A (en) Machine for winding a rotor for a rotating electrical machine
GB1356984A (en) Electro-mechanical rotary drive devices