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US1495823A - Electrical coil and method of making the same - Google Patents

Electrical coil and method of making the same Download PDF

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Publication number
US1495823A
US1495823A US43730321A US1495823A US 1495823 A US1495823 A US 1495823A US 43730321 A US43730321 A US 43730321A US 1495823 A US1495823 A US 1495823A
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Prior art keywords
coil
fabric
layers
conductor
windings
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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
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Inventor
Charles R Underhill
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ACME WIRE Co
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ACME WIRE Co
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00Apparatus 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
    • H01F41/02Apparatus 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
    • H01F41/04Apparatus 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
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/4902Electromagnet, transformer or inductor
    • Y10T29/49071Electromagnet, transformer or inductor by winding or coiling

Description

May 27 1924. 1,495,823

C. FQ.` UNDERHILL ELECTRICAL COIL'AND METHOD OF MAKING THE SAME Filed Jan. 14'. 1921 Patented May 27,l 1924.

UNITED STATES 1,495,823 PATENT OFFICE.

CHARLES R. UNDERHILL, F HAVEN, CONNECTICUT, ASSIGNOR T0 THE ACME WIRE COMPANY, 0F NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTI- CUT.

ELECTRICAL COIL AND METHOD 0F MAKING THE SAME.

Application filed January 14, 1921. Serial No.v 437,308.

To all 'whom it may comcwt:

Be it known that I, CHARLES R. UNDER- HILL, a citizen of the United States, and resident of New Haven, in' the count of New Haven and State of Connecticut, ave invented a certain new and useful Electrical Coil and Method of Making the Same, of which the following is a specification.

The invention relatesvto the construction of electrical coils involving alternate layers of conductor windings and sheet or strig fabric. usually of insluating material, an has for its object to provide such coils with means to facilitate the introduction and 1F penetration of a suitable binding medium throughout the structure of the coil.

Heretofore, in the construction of wound coils with fabric material interposed between adjacent layers of the conductor, it

so has been found extremely diiiicult and in many cases practically impossible to force viscous melted binding media or compounds into the structure of the coil, owing to the resistance of the fabric material, such as sized paper, oiled linen, and the like, to impregnation. This is particularly true in cases in which the conductors are initially covered with a liquid proof insulating sheet and laid up in'successive layers with the :l0 conductor turns in contact with said sheet.

The present invention relates to an improved coil in which a separating fabric,

either in sheet or strip form, is interposedv between the successive layers of the conductor windings, said coil involving a series of ducts or passageways formed longitudinally of the coil iu the interposed layers of the fabric, preferably by the insertion of small rods. cords, or the like. between the layers 40 of the conductor windings and the superposed fabric, which cause the fabric to be deformed or arched to a sufficient extent to provide longitudinal openings adjacent the rods or cords which afford a ready passage for the impregnating medium. The latter, therefore, may find ready access to all parts of the coil structure between the convolutionsof the various layers of the conductor windings, the same being preferably introduced into the ducts or passageways at one end of the coil, whence it works its way throughout the body of the coil.

The invention is illustrated in the accompanying drawings, in which:

Fig. l is a perspective view, partly in section, showing a simple helical coil involving the invention; and

Fig. 2 is a sectional elevation thereof.

Referring to the drawings, 1 indicates the core or mandrel upon which the coil is wound, and 2 the successive layers of the conductor windings which are laid up in helical form, each of the layers of the conductor windings being separated from the layer adjacent thereto by a sheet or strip of fabric 3, such as paper or other materialA usually employed for this purpose and which is usually impervious to the ordinary forms of impregnating and binding media which are applied to the coil, and which would therefore prevent the binding media penetrating the coil structure to any ma terial extent.

In order to provide'` during the formation of the coil, an effective means for admitting the binding medium to the interior of the coil and distributing the same throughout the structure of the coil, there is interposed between each of the layers of the conductor windings and the superposed fabric, one or more rods or cords 4, preferably of insulating material, which are disposed longitudinally of the coil and preferably extend from end to end thereof. These rods or cords cause the superposed fabric to be deformed or arched where it passes over them and thereby produce ducts or passageways 5, 5, through which the viscous or uid impregnating medium may be introduced and distributed throughout the body of the coil 90 to inipregnate the structure thoroughly and uniformly.

The number and disposition of the rod or cord like elements 4 applied between each conductor layer and the superposed fabric 95 layer may, obviously, be. left to the judgnient or discretion of the designer of the coil, and it has been found that in some cases a single rod or cord for each layer of winding will suffice.' W'hile'it is apparent that the inter osition of the rod or cord will cause a s ight deformation of the coil, by disposing the rods adjacent the successive layers in definite angular relation around the axis of the coil, the desired contour of the coil will be maintained.

The invention is applicable to coils of various types and configurations, and may also be applied to operations involving the simultaneous winding of multiple coils,

which are subsequently separated or subdivided transversely. It is also applicable to coils of Various types in which the inter-- penetration of a binding medium throughout the coil structure.

2. A wire coil comprising alternating layers of conductor windings and separating fabric, and longitudinal spacers between adjacent conductor and fabric layers forming ducts to facilitate the penetration of a binding medium throughout the coil structure.

3. A wire coil comprising alternating layers of conductor windings and separating fabric, and longitudinal rod-like elements disposed between adjacent conductor and fabric layers to form ducts in the fabric layers to facilitate the penetration of binding media throughout the coil structure.

4. A wire coil comprising alternating layers of conductor windings and insulating fabric, and longitudinal rod-like elements disposed between adjacent conductor and fabric layers to form ducts in thefabric lay- 6. The method of constructing electrical wire coils, which comprises forming alternating layers of conductor windings and insulating fabric, interposing rod-like elements longitudinally of the coil between the conductor and fabric layers toform open yducts in said fabric layers, and applying a binding medium to the interior of the coil structure through said ducts.

7. The method of constructing electrical wire coils, which com rises forming alternating layers of con uctor windings and insulating fabric, intel-posing spacers longitudinally of the coil between the conductor and fabric layers to form open ducts therebetween` and applying a binding medium to the interior of the coil structure through said ducts.

Signed at Hamden. in the county of New Haven and State of Connecticut this 13th day of December A. D. '1920.

CHARLES R. UNDERHILL.

US1495823A 1921-01-14 1921-01-14 Electrical coil and method of making the same Expired - Lifetime US1495823A (en)

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US1495823A US1495823A (en) 1921-01-14 1921-01-14 Electrical coil and method of making the same

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2479400A (en) * 1948-06-15 1949-08-16 Gen Electric Method of forming coil assemblies
US2755821A (en) * 1953-04-21 1956-07-24 William F Stahl Laminated tube structure
US3440587A (en) * 1966-02-21 1969-04-22 Dow Corning Electrical induction apparatus construction
US3722082A (en) * 1966-12-28 1973-03-27 Foster Transformer Co Method of making electrical transformer means
US3789337A (en) * 1971-12-17 1974-01-29 Westinghouse Electric Corp Insulation structure for electrical apparatus
US3810303A (en) * 1969-05-15 1974-05-14 J Hoell Method of making electrical transformer means
US5028905A (en) * 1990-07-23 1991-07-02 Zenith Electronics Corporation High voltage coil having split plastic tubes
US20050275496A1 (en) * 2004-06-01 2005-12-15 Abb Technology Ag Transformer coil assembly
US20110095642A1 (en) * 2009-10-22 2011-04-28 Yuji Enomoto Magnetic iron core, method for manufacturing the same, axial-gap rotating electrical machine, and static electrical machine
US20110273259A1 (en) * 2008-05-13 2011-11-10 Abb Technology Ag Dry-type transformer

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2479400A (en) * 1948-06-15 1949-08-16 Gen Electric Method of forming coil assemblies
US2755821A (en) * 1953-04-21 1956-07-24 William F Stahl Laminated tube structure
US3440587A (en) * 1966-02-21 1969-04-22 Dow Corning Electrical induction apparatus construction
US3722082A (en) * 1966-12-28 1973-03-27 Foster Transformer Co Method of making electrical transformer means
US3810303A (en) * 1969-05-15 1974-05-14 J Hoell Method of making electrical transformer means
US3789337A (en) * 1971-12-17 1974-01-29 Westinghouse Electric Corp Insulation structure for electrical apparatus
US5028905A (en) * 1990-07-23 1991-07-02 Zenith Electronics Corporation High voltage coil having split plastic tubes
US20070220738A1 (en) * 2004-06-01 2007-09-27 Abb Technology Ag Method of forming a transformer coil
EP1774546A2 (en) * 2004-06-01 2007-04-18 ABB Technology AG Transformer coil assembly
US20050275496A1 (en) * 2004-06-01 2005-12-15 Abb Technology Ag Transformer coil assembly
US7688170B2 (en) * 2004-06-01 2010-03-30 Abb Technology Ag Transformer coil assembly
US7905009B2 (en) 2004-06-01 2011-03-15 Abb Technology Ag Method of forming a transformer coil
EP1774546A4 (en) * 2004-06-01 2012-11-28 Abb Technology Ag Transformer coil assembly
CN1973343B (en) 2004-06-01 2011-06-15 Abb技术有限公司 Transformer coil assembly and method of constitution of transformer coil block
US20110273259A1 (en) * 2008-05-13 2011-11-10 Abb Technology Ag Dry-type transformer
US8310330B2 (en) * 2008-05-13 2012-11-13 Abb Technology Ag Dry-type transformer
US20110095642A1 (en) * 2009-10-22 2011-04-28 Yuji Enomoto Magnetic iron core, method for manufacturing the same, axial-gap rotating electrical machine, and static electrical machine
US8937422B2 (en) * 2009-10-22 2015-01-20 Hitachi Industrial Equipment Systems Co., Ltd. Magnetic iron core, method for manufacturing the same, axial-gap rotating electrical machine, and static electrical machine

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