US3352509A - Multi-piece coil bobbin - Google Patents

Multi-piece coil bobbin Download PDF

Info

Publication number
US3352509A
US3352509A US513966A US51396665A US3352509A US 3352509 A US3352509 A US 3352509A US 513966 A US513966 A US 513966A US 51396665 A US51396665 A US 51396665A US 3352509 A US3352509 A US 3352509A
Authority
US
United States
Prior art keywords
tabs
side members
end pieces
pair
members
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
US513966A
Inventor
Hans A Kort
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.)
Sola Basic Industries Inc
Original Assignee
Sola Basic Industries 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 Sola Basic Industries Inc filed Critical Sola Basic Industries Inc
Priority to US513966A priority Critical patent/US3352509A/en
Application granted granted Critical
Publication of US3352509A publication Critical patent/US3352509A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00Coils
    • H01F5/02Coils wound on non-magnetic supports, e.g. formers

Definitions

  • This invention relates to bobbins or spools for the coils or windings of inductances, transformers and the like, and more particularly to a multi-piece bobbin that can be stored in a fiat or knocked-down condition and readily assembled into spool form.
  • An object of the present invention is to provide a new and improved structure for a bobbin of the multi-piece knock-down type.
  • a further object of the invention is to provide a new and improved multi-piece bobbin which can be quickly and readily assembled from flat sheets and which is rigid- 1y retained in the assembled spool form.
  • a still further object of the invention is to provide a bobbin of this character which is rigidly retained in assembled form without the use of extraneous materials and which provides a smooth outer core or coil Winding surface free from projecting ribs or the like.
  • the invention comprises three pairs of members made from flat sheet material, one of said pairs forming the end pieces of the assembled spool, and the other two pairs forming the sides of the core or coil winding portion.
  • Each of the end pieces has similar rectangular apertures or openings adapted to receive opposite ends of the side members, each end piece being further provided with a pair of integral tabs extending inwardly from two opposite sides of the opening.
  • One pair of the side members has notches adapted to interlock with the tabs on the end pieces, and also has integral tabs adapted to interlock with notches provided in the other pair of side members.
  • Both ends of the lastmentioned pair of side members include laterally extending integral tabs adapted to bear against the outer faces of the end pieces, the entire arrangement of tabs and notches being such that when the parts are assembled and snapped into position, a self-contained rigid bobbin or spool having a smooth core or coil winding surface is provided. If desired, one or both of the end pieces may be provided with notches and/ or openings for receiving wire ends and terminal connectors.
  • FIG. 1 is a perspective view of the assembled bobbin
  • FIG. 2 is a plan view of one of the pairs of end pieces
  • FIG. 3 is a plan view of one of the pairs of side members.
  • FIG. 4 is a plan view of the other of the pairs of side members.
  • the bobbin is shown as comprising a pair of end pieces 14, upper and lower side pieces or members 16, and a second pair of side pieces or members 18.
  • the pair of end pieces or members 14, the pair of upper and lower side members 16, and the other pair of side members 18 are each of the same size and shape, and thus only one member of each pair is illustrated in FIGS. 2-4 of the drawing.
  • Each of the members comprises a flat sheet of insulating material having a thickness sulficient to give the desired rigidity to the assembled device and also having sufficient flexibility and resiliency to permit snapping the last piece into the assembled structure.
  • Such material for example, may comprise a glass-reinforced polyester such as Insulstruc, the main requirement being that it be strong and relatively rigid as well as semiflexible.
  • the end pieces 14 may include a centrally disposed opening or cut-out portion 20 within which the ends 22 and 24 of the side members 16 and 18 are adapted closely to fit.
  • the size of the opening 20 and the corresponding widths of the side members 16 and 18 can be varied to provide a core portion 26 of any desired size and cross sectional area.
  • the end pieces 14 are also provided with a pair of integral tabs 28 which extend outwardly into opening 20 from two opposite sides 30 of the opening.
  • the upper and lower side members 16 are of generally rectangular shape, and at each end 22 thereof there is a pair of laterally or outwardly extending integral tabs 32 which are positioned outwardly of the end pieces 14 in the assembled structure. Tabs 32 are adapted to bear against the outer faces or surfaces of the end members as shown in FIG. 1.
  • Each of the upper and lower side members 16 is also provided with a pair of notches 34 which extend inwardly from the sides 36 to which the tabs 32 are attached.
  • the width of the members 16, i.e., the distance between the sides 36, is substantially the same as the width of the opening 20 in the end pieces 14, so that the upper and lower side members 16 fit rather closely between the edges or sides 30 of the opening 20 when the bobbin is assembled and the tabs 32 extend outwardly from continuous or uninterrupted portions of the sides 36.
  • the remaining pair of side members 18 is of generally rectangular shape and is provided with a pair of notches 38 which extend inwardly from the end edges 24 and a pair of integral tabs 40 which extend laterally outward from the sides 42 of the member.
  • the notches 38 are of such size as to interlock with the tabs 28 of the end pieces 14, and the tabs 40 are of such size as to interlock with the notches 34 of the upper and lower side members 16 as shown in FIG. 1.
  • the width of side members 18 between the side edges 42 is such that the members 18 fit closely between the upper and lower side member 16 when the bobbin is assembled, the height of the opening 20 in end pieces 14 being equal to the width of member 18 plus the thickness of the upper and lower members 16.
  • the length of the side members 16 is preferably such that the ends 24 are flush with the outer faces of the end pieces 14 when assembled.
  • the bobbin when the bobbin is disassembled or knocked-down, all of the parts can be stacked flat and occupy very little space for shipping and storage.
  • the upper and lower side members 16 are tilted about their longitudinal axes and slipped through the openings 20 in end pieces 14, so that the tabs 32 are positioned outwardly of the end pieces.
  • One of the side members 18 is next inserted to space the upper and lower members 16 and to press their upper and lower sides respectively against the upper and lower edges or sides of the openings 20.
  • notches 38 of the side member interengage a tab 28 on each of the end pieces 14, and the tabs 40 of the side member 18 interengage and interlock with the notches .34 of upper and lower members 16.
  • the remaining side member 18 is then inserted and snapped into position with its notches and tabs interlocking with tabs and .notches on the end pieces and the upper and lower members in the same manner as the opposite side 18.
  • the end pieces 14 are thus pressed vor clamped against the tabs .32 and are retained in proper spaced relationship by engagement of the inner sides or walls of notches 38 with tabs 28 without the need of slots or the like in members 16 adjacent the tabs 32.
  • the side members 18 are maintained in proper spaced relationship by tabs 40 and notches 34.
  • the resultant bobbin or spool of the multi-piece or knock-down type is simple in construction, easy to .assemble, and very rigid in assembled form. Furthermore, a smooth core or coil winding portion free of projecting ribs or the like .is provided without the use of any extraneous material.
  • One or both of the end pieces 14 may be provided with notches 50 and/or apertures 52, for example, for receiving leads to the coil winding and terminal connectors.
  • a multi-piece bobbin of the knock-down type for Wire coils comprising a pair of end pieces, each having .:a substantially central opening with tabs projecting inwardly into the opening from opposite sides thereof; a pair of side members for the core portion of said bobbin, each having a pair of lateral tabs at both ends thereof extending directly outward from a continuous surface of said side members for engaging the outer faces of said end pieces; and a second pair of side members for said core portion adapted to fit between said first-mentioned side members and provided with notches in the "end portions thereof adapted to interengage with said tabs on the end pieces to clamp and retain the end pieces in predetermined spaced relation on said core portion with said second pair of side members confined within said openings of said end pieces; each of said first-mentioned side members being further provided with a notch intermediate said laterally extending tabs, and each-of said .second pair of side members being further provided with an outwardly extending tab adapted to interengage with said lastmentioned

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)

Description

NOV. 14, 196 7 I KORT MULTI -PIECE COIL BOBBIN Filed Dec. 15, 1965 FIG.4
INVENTOR. )9.
Near
ATTORN United States Patent C) 3,352,50 MULTI-PIECE COIL BOBBIN Hans A. Kort, Lake Geneva, Wis., assignor to Sola Basic Industries, Inc., Milwaukee, Wis. Filed Dec. 15, 1965, Ser. No. 513,966 1 Claim. (Cl. 242118.4)
This invention relates to bobbins or spools for the coils or windings of inductances, transformers and the like, and more particularly to a multi-piece bobbin that can be stored in a fiat or knocked-down condition and readily assembled into spool form.
In prior bobbins of this character, it has been necessary to provide the assembled spool with a separate strip of relatively stiff insulating material to retain the bobbin in assembled condition, such as in US. Patent No. 1,895,776 to Stolp, or the side members of the core portion are provided with tongue and slot connections which provide undesirable flange-like projections or ribs on the core portion as in US. Patent No. 3,108,763 to Ahlene.
An object of the present invention is to provide a new and improved structure for a bobbin of the multi-piece knock-down type.
A further object of the invention is to provide a new and improved multi-piece bobbin which can be quickly and readily assembled from flat sheets and which is rigid- 1y retained in the assembled spool form.
A still further object of the invention is to provide a bobbin of this character which is rigidly retained in assembled form without the use of extraneous materials and which provides a smooth outer core or coil Winding surface free from projecting ribs or the like.
In a preferred aspect, the invention comprises three pairs of members made from flat sheet material, one of said pairs forming the end pieces of the assembled spool, and the other two pairs forming the sides of the core or coil winding portion. Each of the end pieces has similar rectangular apertures or openings adapted to receive opposite ends of the side members, each end piece being further provided with a pair of integral tabs extending inwardly from two opposite sides of the opening. One pair of the side members has notches adapted to interlock with the tabs on the end pieces, and also has integral tabs adapted to interlock with notches provided in the other pair of side members. Both ends of the lastmentioned pair of side members include laterally extending integral tabs adapted to bear against the outer faces of the end pieces, the entire arrangement of tabs and notches being such that when the parts are assembled and snapped into position, a self-contained rigid bobbin or spool having a smooth core or coil winding surface is provided. If desired, one or both of the end pieces may be provided with notches and/ or openings for receiving wire ends and terminal connectors.
The above and other objects, features and advantages of the invention will become apparent from the following description and accompanying drawing which are merely exemplary.
In the drawing:
FIG. 1 is a perspective view of the assembled bobbin;
FIG. 2 is a plan view of one of the pairs of end pieces;
FIG. 3 is a plan view of one of the pairs of side members; and
FIG. 4 is a plan view of the other of the pairs of side members.
Referring to the drawing, and particularly to FIG. 1, the bobbin is shown as comprising a pair of end pieces 14, upper and lower side pieces or members 16, and a second pair of side pieces or members 18. The pair of end pieces or members 14, the pair of upper and lower side members 16, and the other pair of side members 18 are each of the same size and shape, and thus only one member of each pair is illustrated in FIGS. 2-4 of the drawing. Each of the members comprises a flat sheet of insulating material having a thickness sulficient to give the desired rigidity to the assembled device and also having sufficient flexibility and resiliency to permit snapping the last piece into the assembled structure. Such material, for example, may comprise a glass-reinforced polyester such as Insulstruc, the main requirement being that it be strong and relatively rigid as well as semiflexible.
As shown in FIGS. 1 and 2, the end pieces 14 may include a centrally disposed opening or cut-out portion 20 within which the ends 22 and 24 of the side members 16 and 18 are adapted closely to fit. The size of the opening 20 and the corresponding widths of the side members 16 and 18 can be varied to provide a core portion 26 of any desired size and cross sectional area. The end pieces 14 are also provided with a pair of integral tabs 28 which extend outwardly into opening 20 from two opposite sides 30 of the opening.
As shown in FIGS. 1 and 3, the upper and lower side members 16 are of generally rectangular shape, and at each end 22 thereof there is a pair of laterally or outwardly extending integral tabs 32 which are positioned outwardly of the end pieces 14 in the assembled structure. Tabs 32 are adapted to bear against the outer faces or surfaces of the end members as shown in FIG. 1. Each of the upper and lower side members 16 is also provided with a pair of notches 34 which extend inwardly from the sides 36 to which the tabs 32 are attached. The width of the members 16, i.e., the distance between the sides 36, is substantially the same as the width of the opening 20 in the end pieces 14, so that the upper and lower side members 16 fit rather closely between the edges or sides 30 of the opening 20 when the bobbin is assembled and the tabs 32 extend outwardly from continuous or uninterrupted portions of the sides 36.
As shown in FIGS. 1 and 4, the remaining pair of side members 18 is of generally rectangular shape and is provided with a pair of notches 38 which extend inwardly from the end edges 24 and a pair of integral tabs 40 which extend laterally outward from the sides 42 of the member. The notches 38 are of such size as to interlock with the tabs 28 of the end pieces 14, and the tabs 40 are of such size as to interlock with the notches 34 of the upper and lower side members 16 as shown in FIG. 1. The width of side members 18 between the side edges 42 is such that the members 18 fit closely between the upper and lower side member 16 when the bobbin is assembled, the height of the opening 20 in end pieces 14 being equal to the width of member 18 plus the thickness of the upper and lower members 16. The length of the side members 16 is preferably such that the ends 24 are flush with the outer faces of the end pieces 14 when assembled.
From the foregoing description, it will be evident that when the bobbin is disassembled or knocked-down, all of the parts can be stacked flat and occupy very little space for shipping and storage. In order to assemble the bobbin, the upper and lower side members 16 are tilted about their longitudinal axes and slipped through the openings 20 in end pieces 14, so that the tabs 32 are positioned outwardly of the end pieces. One of the side members 18 is next inserted to space the upper and lower members 16 and to press their upper and lower sides respectively against the upper and lower edges or sides of the openings 20. At the same time, notches 38 of the side member interengage a tab 28 on each of the end pieces 14, and the tabs 40 of the side member 18 interengage and interlock with the notches .34 of upper and lower members 16. The remaining side member 18 is then inserted and snapped into position with its notches and tabs interlocking with tabs and .notches on the end pieces and the upper and lower members in the same manner as the opposite side 18. The end pieces 14 are thus pressed vor clamped against the tabs .32 and are retained in proper spaced relationship by engagement of the inner sides or walls of notches 38 with tabs 28 without the need of slots or the like in members 16 adjacent the tabs 32. The side members 18 are maintained in proper spaced relationship by tabs 40 and notches 34. The upper and lowerside wall members 16 are maintained 'in proper .spaced relationship by the interposed side wall members Thus, the resultant bobbin or spool of the multi-piece or knock-down type is simple in construction, easy to .assemble, and very rigid in assembled form. Furthermore, a smooth core or coil winding portion free of projecting ribs or the like .is provided without the use of any extraneous material. One or both of the end pieces 14 may be provided with notches 50 and/or apertures 52, for example, for receiving leads to the coil winding and terminal connectors.
Other features, changes and modifications may also be incorporated in the described and illustrated embodiment of the invention without departing from the spirit of the invention, and it is intended that the invention be limited only by the scope of the appended claim.
What is claimed is:
A multi-piece bobbin of the knock-down type for Wire coils comprising a pair of end pieces, each having .:a substantially central opening with tabs projecting inwardly into the opening from opposite sides thereof; a pair of side members for the core portion of said bobbin, each having a pair of lateral tabs at both ends thereof extending directly outward from a continuous surface of said side members for engaging the outer faces of said end pieces; and a second pair of side members for said core portion adapted to fit between said first-mentioned side members and provided with notches in the "end portions thereof adapted to interengage with said tabs on the end pieces to clamp and retain the end pieces in predetermined spaced relation on said core portion with said second pair of side members confined within said openings of said end pieces; each of said first-mentioned side members being further provided with a notch intermediate said laterally extending tabs, and each-of said .second pair of side members being further provided with an outwardly extending tab adapted to interengage with said lastmentioned notches to retain the second pair of side members in spaced relationship.
References Cited UNITED STATES PATENTS 1,895,776 1/ 1933 Stolp 242-1 187 X 1,997,641 4/1935 Isenberg 242-1187 2,229,413 1/ 1941 Joost '242--118.8 2,428,826 -1-0/ 1947 Bauer 2'42--118;4 X 3,108,763 10/ 1963 Ahlene 2'42-1 15 FOREIGN PATENTS 646,957 11/1950 Great Britain. 651,658 4/ 1951 Great Britain.
GEORGE F. MAUTZ, Primary Examiner.
US513966A 1965-12-15 1965-12-15 Multi-piece coil bobbin Expired - Lifetime US3352509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US513966A US3352509A (en) 1965-12-15 1965-12-15 Multi-piece coil bobbin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US513966A US3352509A (en) 1965-12-15 1965-12-15 Multi-piece coil bobbin

Publications (1)

Publication Number Publication Date
US3352509A true US3352509A (en) 1967-11-14

Family

ID=24045281

Family Applications (1)

Application Number Title Priority Date Filing Date
US513966A Expired - Lifetime US3352509A (en) 1965-12-15 1965-12-15 Multi-piece coil bobbin

Country Status (1)

Country Link
US (1) US3352509A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0037500A1 (en) * 1980-03-21 1981-10-14 W. Meffert KG Bobbin for air-cooled coil
US5287965A (en) * 1993-06-15 1994-02-22 Miller John E Light storage device
US20170085156A1 (en) * 2015-09-18 2017-03-23 Industrial Technology Research Institute Winding frame structure for motors

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1895776A (en) * 1930-06-07 1933-01-31 Siemens Ag Spool for electrical coils
US1997641A (en) * 1933-04-27 1935-04-16 Hans D Isenberg Spool and coil body
US2229413A (en) * 1938-11-03 1941-01-21 Edwards And Company Inc Transformer construction and winding
US2428826A (en) * 1944-10-27 1947-10-14 Shure Bros Coil and support construction
GB646957A (en) * 1948-01-09 1950-11-29 Clarence Thomas Woolmer Headin Improvements in the construction of bobbins, formers and the like
GB651658A (en) * 1948-05-20 1951-04-04 Armand Taylor Improvements in or relating to bobbins
US3108763A (en) * 1962-01-02 1963-10-29 Aerojet General Co Coil form

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1895776A (en) * 1930-06-07 1933-01-31 Siemens Ag Spool for electrical coils
US1997641A (en) * 1933-04-27 1935-04-16 Hans D Isenberg Spool and coil body
US2229413A (en) * 1938-11-03 1941-01-21 Edwards And Company Inc Transformer construction and winding
US2428826A (en) * 1944-10-27 1947-10-14 Shure Bros Coil and support construction
GB646957A (en) * 1948-01-09 1950-11-29 Clarence Thomas Woolmer Headin Improvements in the construction of bobbins, formers and the like
GB651658A (en) * 1948-05-20 1951-04-04 Armand Taylor Improvements in or relating to bobbins
US3108763A (en) * 1962-01-02 1963-10-29 Aerojet General Co Coil form

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0037500A1 (en) * 1980-03-21 1981-10-14 W. Meffert KG Bobbin for air-cooled coil
US5287965A (en) * 1993-06-15 1994-02-22 Miller John E Light storage device
US20170085156A1 (en) * 2015-09-18 2017-03-23 Industrial Technology Research Institute Winding frame structure for motors
CN106549522A (en) * 2015-09-18 2017-03-29 财团法人工业技术研究院 Motor Winding frame structure
US10141818B2 (en) * 2015-09-18 2018-11-27 Industrial Technology Research Institute Winding frame structure for motors
CN106549522B (en) * 2015-09-18 2019-10-01 财团法人工业技术研究院 motor winding frame structure

Similar Documents

Publication Publication Date Title
US5534839A (en) Miniature transformer
US6583697B2 (en) Transformer
US3191135A (en) Self-mounting electrical apparatus
US3117294A (en) Bobbin with insulated lead-in means
US4405913A (en) Coil body
US4000483A (en) Low voltage power transformer
US2355477A (en) Form for windings and the like
US4083464A (en) Knockdown reusable container
US3110873A (en) Unitary clamping and support arrangement for coil and core assembly
GB2035706A (en) Inductance element
US3927624A (en) Knock down pallet
US3480229A (en) Coil winding form
US4510478A (en) Coil body
JP5740873B2 (en) Trance
US3352509A (en) Multi-piece coil bobbin
US4599595A (en) Laminated iron core for transformers, choke coils and the like
US3011140A (en) Coil insulating and lead anchoring means for transformers
US3524156A (en) Printed circuit transformer bobbin
US6060975A (en) Bobbin with integral support tabs
US3533589A (en) Spring clamp for pot cores
US1481190A (en) Spool
US4800357A (en) Transformer support assembly
US4064473A (en) Transformer with windings in helical slots of core
US1997641A (en) Spool and coil body
JP2002134334A (en) Bobbin for large-sized transformer