US3634164A - Method of making adhesive-bonded electrical coil - Google Patents

Method of making adhesive-bonded electrical coil Download PDF

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Publication number
US3634164A
US3634164A US853058A US3634164DA US3634164A US 3634164 A US3634164 A US 3634164A US 853058 A US853058 A US 853058A US 3634164D A US3634164D A US 3634164DA US 3634164 A US3634164 A US 3634164A
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United States
Prior art keywords
coil
wire
adhesive
turns
making
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Expired - Lifetime
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US853058A
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English (en)
Inventor
Martinus Johannes Van Hirtum
Wilhelmus Leonard Loui Lenders
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US Philips Corp
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US Philips Corp
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Publication date
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Publication of US3634164A publication Critical patent/US3634164A/en
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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

Definitions

  • the invention relates to a coil, turns of which are firmly joined together by bonding, especially to a coil for electrical apparatus which is made of an electrically conductive materia1.
  • Such coils are usually wound from wire or strip material.
  • wire is defined as including strip.”
  • Swiss patent specification 442.499 described an essentially cup-shaped armature of the above mentioned kind, which is used in a small electric motor and which, after having been completely wound, is provided with a layer of enamel. After drying, the windings are firmly joined to one another by bounding so that the armature is a rigid unit.
  • lt is also known to wind coils of the above mentioned kind, for example loudspeaker coils, from electrically conductive wire provided with a covering of a material which has the property of softening at elevated temperatures. After the coils have been wound, they are heated so that the outer portion of the insulating covering softens and in turn adheres together. After cooling there is a firm bond between the wires.
  • the first-mentioned of the two known coils has the distinct disadvantage that the wound coil must be covered with a sticky, comparatively slow drying substance, the covering operation is regarded as highly undesirable in mass manufacture, since the mechanization for such an operation is readily fouled up by the covering substance, and because the adhesive substance is frequently deposited on component parts connected to the coil, such as the rotor shaft. This is obviously undesirable and increases the reject percentage.
  • the second of the said known coils can be made without the occurrence of the said manufacturing difficulties; however, there still are the disadvantages that the wound coil must be subjected to an additional operation by means of special equipment and that it will only be a rigid unit after this operation.
  • the latter difficulty is particularly inconvenient in those cases in which, unless the turns have been rigidly joined together, the coils tend to spontaneously unwind entirely or partially or in which the turns tend to slide from the coil.
  • This disadvantage is increased, if during the winding process special end connections must be formed, as is the case in a rotor coil which must be provided with end connections to be connected to the commutator or to slip rings.
  • the invention is characterized in that the turns are firmly joined together by a contact adhesive.
  • contact adhesive is to be understood to mean any kind of adhesive which has the property that layers thereof will adhere to one another in a dry state. Also included are the commercially available adhesive which in addition to this property have the properties that dry layers have adhesive force substantially only in cooperation with layers of adhesive of the same kind, also some adhesives contain highly volatile solvents so that thin layers will dry extremely quickly.
  • the coil according to the invention is preferably made by means of a method which is characterized in that the wire before being wound on the coil is provided with a contact adhesive, after which any superfluous contact adhesive is removed, and then the covered wire is dried.
  • An embodiment of a coil according to the invention is characterized in that the windings which bear on the coil former and the coil former are firmly joined together by a contact adhesive.
  • the advantage of this embodiment consists in that relative movement of the coil and the coil former is prevented. Furthermore, during the winding process the turns which have not as yet engaged the other turns are fixed with respect to the coil former.
  • a preferred embodiment of a coil according to the invention is characterized in that the wire is provided with a thin covering of contact adhesive throughout its length. This embodiment ensures maximum adherence of the turns to one another.
  • the latter coil is characterized in that the wire is passed through a container filled with a liquid contact adhesive, any superfluous adhesive being removed by pulling the wire through a calibrated aperture. It is possible to apply a covering of adhesive which after drying is only 1 micron thick. Even with very thin wire such a thin covering of contact adhesive scarcely influences the space factor of the coil.
  • the highly regular winding pattern which is readily obtained owing to the fact that each turn is immediately fixed in position, advantageously influences the space factor.
  • coils according to the invention can be manufactured so as to have a better space factor than known coils wound by the same winding method.
  • a further embodiment of the invention relates to a bobbinshaped coil the turns of which extend both along a cylindrical surface in a substantially axial direction and along the axial boundary surfaces in a substantially diametrical direction.
  • a bobbin-shaped coil is known and described in the US. Pat. No. 2,513,410, in which the coil wound on a coil former and used with an electric motor rotor.
  • Such rotors have the attractive property that they can be rapidly and simply wound, because the coil is regularly distributed about the entire circumference, so that during winding no indexing movements are required.
  • the coil has the same transverse dimension throughout so that a small airgap is sufficient.
  • the above-mentioned embodiment of the invention provides a solution of these difficulties in bobbin-shaped coils in which the turns are firmly joined together by means of a contact adhesive, and is characterized in that those wire portions of successive turns which traverse the axial boundary surfaces are spaced from the axis of the coil by a distance equal to a substantially constant distance plus a substantially periodically varying distance.
  • the bobbin-shaped coil according to this embodiment has remarkable flat axial ends, since the substantially diametrically crossing wire portions are effectively spread over the axial boundary surfaces.
  • FIG. 1 shows a completed bobbin-shaped coil which is wound on a coil formed and in which the turns are firmly joined to one another and to the coil former by a contact adhesive
  • FIG. 2 is a part of a graph showing the distances by which those wire portions of successive turns of the coil shown in FIG. I which cross axial boundary surfaces are spaced from the axis, and
  • FIG. 3 schematically shows a winding machine for manufacturing the coil shown in FIG. 1.
  • a bobbin-shaped coil a which is wound on a coil former, which is not shown in the Figure, and can be used as a rotor for a small battery-fed electric motor for use in a portable dictaphone, which rotor contains no iron.
  • a rotor shaft can be inserted in the aperture b.
  • the end connections required for the supply of current to the rotor are not shown.
  • the turns extend along the cylindrical surface of the coil in a substantially axial direction and across axial boundary surfaces d and e in a substantially diametrical direction.
  • the winding machine shows schematically in FIG. 3 has a part f commonly referred to as flyer, which revolves and guides the wire on to the coil a, which also rotates about its axis.
  • flyer By imparting a reciprocating movement to the flyerf, for example by means of a disc-shaped cam, during the winding process the periodically varying distance q(x) of FIG. 2 is obtained.
  • the winding wire g is unwound from a supply reel h, then passes through a vessel 1' containing liquid contact adhesive j, is stripped of any superfluous contact adhesive by being pulled through a calibrated aperture k and is dried at I by means ofa fan m.
  • drying may obviously be effected without special applicances or it may be effected by means ofa heater instead ofa fan.
  • Contact adhesives particularly suitable are of the polyvinyl or synthetic rubber/resin type, for example, the adhesive sold under the trade name Bostik No. I430 and manufactured by Bostik Ltd., Leicester, England. These adhesives have been found to be especially effective at an operational temperature range of 40-80 C.; however, other adhesives may be equally effective at the same or other temperature ranges and such modification to the steps described should be apparent to those skilled in the art.
  • a method of making a coil comprising: applying a contact adhesive to an electrically conductive wire, drying the adhesive on the wire so that the wire is coated with a dry adhesive, and winding turns of the wire in a pattern onto a coil-former so that the wires adhesively contact each other.
  • a method of making a coil as claimed in claim 1 wherein the wire is contacted with the adhesive by passing the wire through a vessel containing a liquid adhesive, and then stripping superfluous adhesive from the wire by pulling the wire through a calibrated aperture in the vessel to provide a thin covering of adhesive on the wire.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Insulating Of Coils (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
US853058A 1968-08-31 1969-08-26 Method of making adhesive-bonded electrical coil Expired - Lifetime US3634164A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6812445A NL6812445A (en(2012)) 1968-08-31 1968-08-31

Publications (1)

Publication Number Publication Date
US3634164A true US3634164A (en) 1972-01-11

Family

ID=19804511

Family Applications (2)

Application Number Title Priority Date Filing Date
US853058A Expired - Lifetime US3634164A (en) 1968-08-31 1969-08-26 Method of making adhesive-bonded electrical coil
US00128542A Expired - Lifetime US3783425A (en) 1968-08-31 1971-03-26 Bobbin coil

Family Applications After (1)

Application Number Title Priority Date Filing Date
US00128542A Expired - Lifetime US3783425A (en) 1968-08-31 1971-03-26 Bobbin coil

Country Status (9)

Country Link
US (2) US3634164A (en(2012))
JP (2) JPS4719286B1 (en(2012))
AT (1) AT312764B (en(2012))
CH (1) CH500574A (en(2012))
DE (1) DE1940580C3 (en(2012))
FR (1) FR2016730A1 (en(2012))
GB (1) GB1265877A (en(2012))
NL (1) NL6812445A (en(2012))
SE (1) SE368298B (en(2012))

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4547238A (en) * 1983-02-14 1985-10-15 U.S. Philips Corporation Method of manufacturing a saddle-shaped coil
US5280206A (en) * 1991-07-16 1994-01-18 Seiko Seiki Kabushiki Kaisha Armature stator
US5576584A (en) * 1994-03-16 1996-11-19 Mitsubishi Denki Kabushiki Kaisha Stator of a vehicular alternating current generator and its manufacturing method
US6023216A (en) * 1998-07-20 2000-02-08 Ohio Transformer Transformer coil and method
US20050097723A1 (en) * 2000-09-29 2005-05-12 Delta Electronics Inc. Stator structure of rotary device and its forming method
US20120192983A1 (en) * 2009-07-23 2012-08-02 J. Van Beugen Beheer B.V. Inflatable closing plug for pipes
CN106899152A (zh) * 2017-04-16 2017-06-27 赵洁 一种高槽满率双飞叉转子绕线机

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2733024C2 (de) * 1977-07-21 1986-04-10 Siemens AG, 1000 Berlin und 8000 München Schichtisolation für toroidale Körper von Hochspannung führenden elektrischen Bauteilen sowie Verfahren und Vorrichtung zu deren Herstellung
CH627030A5 (en(2012)) * 1978-08-09 1981-12-15 Portescap
CH627031A5 (en(2012)) * 1978-08-09 1981-12-15 Portescap
DE3912143C2 (de) * 1989-04-13 1997-08-28 Alcatel Kabel Ag Aus einem von einer Isolierhülle umgebenen Leiter hergestellter Wickel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707693A (en) * 1950-07-21 1955-05-03 Sprague Electric Co Process for producing electrical coils
US2746598A (en) * 1953-03-09 1956-05-22 Gen Electric Co Ltd Vibratory conveyors and the like
US2964587A (en) * 1956-11-16 1960-12-13 Otis N Minot Tape conductor
US3306971A (en) * 1963-12-06 1967-02-28 Anaconda Wire & Cable Co Insulated electrical strip conductor and method of making same
US3412354A (en) * 1963-02-18 1968-11-19 Westinghouse Electric Corp Adhesive coated electrical conductors

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US731888A (en) * 1902-11-25 1903-06-23 Patrick F O Hale Ball or cop of twine or cord.
US865907A (en) * 1905-10-26 1907-09-10 Gen Electric Coil for electrical purposes.
US873780A (en) * 1907-06-22 1907-12-17 Gen Electric Insulated coil.
US2539926A (en) * 1947-06-06 1951-01-30 Mallory & Co Inc P R Video coupler
US2746898A (en) * 1953-10-29 1956-05-22 Us Rubber Co Dry adhesion method for adhering textile material to rubber
US3237136A (en) * 1964-11-19 1966-02-22 Westinghouse Electric Corp Coils for inductive apparatus
US3396356A (en) * 1965-11-01 1968-08-06 Gen Electric Cross-wound open mesh coil

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707693A (en) * 1950-07-21 1955-05-03 Sprague Electric Co Process for producing electrical coils
US2746598A (en) * 1953-03-09 1956-05-22 Gen Electric Co Ltd Vibratory conveyors and the like
US2964587A (en) * 1956-11-16 1960-12-13 Otis N Minot Tape conductor
US3412354A (en) * 1963-02-18 1968-11-19 Westinghouse Electric Corp Adhesive coated electrical conductors
US3306971A (en) * 1963-12-06 1967-02-28 Anaconda Wire & Cable Co Insulated electrical strip conductor and method of making same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4547238A (en) * 1983-02-14 1985-10-15 U.S. Philips Corporation Method of manufacturing a saddle-shaped coil
US5280206A (en) * 1991-07-16 1994-01-18 Seiko Seiki Kabushiki Kaisha Armature stator
US5576584A (en) * 1994-03-16 1996-11-19 Mitsubishi Denki Kabushiki Kaisha Stator of a vehicular alternating current generator and its manufacturing method
US6023216A (en) * 1998-07-20 2000-02-08 Ohio Transformer Transformer coil and method
US6308401B1 (en) 1998-07-20 2001-10-30 Ohio Transformer Transformer coil and method
US20050097723A1 (en) * 2000-09-29 2005-05-12 Delta Electronics Inc. Stator structure of rotary device and its forming method
US20120192983A1 (en) * 2009-07-23 2012-08-02 J. Van Beugen Beheer B.V. Inflatable closing plug for pipes
US10252462B2 (en) * 2009-07-23 2019-04-09 J. Van Beugen Beheer B.V. Inflatable closing plug for pipes
CN106899152A (zh) * 2017-04-16 2017-06-27 赵洁 一种高槽满率双飞叉转子绕线机

Also Published As

Publication number Publication date
JPS4840377B1 (en(2012)) 1973-11-30
DE1940580C3 (de) 1979-09-27
SE368298B (en(2012)) 1974-06-24
US3783425A (en) 1974-01-01
NL6812445A (en(2012)) 1970-03-03
AT312764B (de) 1974-01-25
JPS4719286B1 (en(2012)) 1972-06-02
DE1940580B2 (de) 1979-02-01
GB1265877A (en(2012)) 1972-03-08
FR2016730A1 (en(2012)) 1970-05-08
DE1940580A1 (de) 1970-03-05
CH500574A (de) 1970-12-15

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