US3434088A - Coil structure - Google Patents

Coil structure Download PDF

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Publication number
US3434088A
US3434088A US675909A US3434088DA US3434088A US 3434088 A US3434088 A US 3434088A US 675909 A US675909 A US 675909A US 3434088D A US3434088D A US 3434088DA US 3434088 A US3434088 A US 3434088A
Authority
US
United States
Prior art keywords
coil
base
turns
spool
rivet
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
US675909A
Other languages
English (en)
Inventor
Robert S Zieles
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.)
AT&T Corp
Original Assignee
Bell Telephone Laboratories 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 Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Application granted granted Critical
Publication of US3434088A publication Critical patent/US3434088A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/027—Casings specially adapted for combination of signal type inductors or transformers with electronic circuits, e.g. mounting on printed circuit boards

Definitions

  • a coil structure comprises a coil wrapped around a spool that is accommodated by a cup-shaped frame.
  • a flange on the spool has a pair of bifurcated extensions about which the initial and final turns of the coil are respectively wound, and one or more of these turns are ultrasonically welded to rivets mounted in the base of the frame.
  • This invention relates to the field of electrical components and within that field to electrical coils. Furthermore, this invention while not limited thereto is particularly adapted for miniaturization.
  • the problem consists of providing a coil structure that permits the electrical connection between the wire of the coil and the lead wires or terminals to be made using production line techniques.
  • the coil structure comprises a spool having a flange at one end thereof that includes a pair of bifurcated extensions, the extensions having a particular spatial relationship with respect to one another.
  • the initial turns of the coil are Wrapped around one of the extensions and the final turns of the coil are wrapped around the other of the extensions, one or more of the turns in each case spanning the space between the bifurcations.
  • T-he spool is positioned on a base that has a pair of holes therein, the holes having the same spatial relationship with respect to one another that the bifurcated extensions have to one another, and a rivet that has a solid top and hollow bottom is mounted in each hole.
  • the spool is positioned on the base so that the wire-wrapped bifurcated extensions are in juxtaposition with the tops of the rivets, and one or more of the turns of wire wrapped around the extensions are ultrasonically welded to the rivets.
  • the termination of the coil structure is completed by the soldering of a lead wire to the hollow underside of each rivet.
  • the coil structure of this invention includes a spool 10 comprising a tubular hub 12 and a single flange 14 at one end of the hub.
  • the flange 14 includes a pair of bifurcated extensions 15 that have a particular spatial relationship to one another, the bifurcated extensions in the embodiment shown in the drawing being diametrically opposed to one another.
  • a coil 16 is wrapped around the spool 10, the initial turns of the coil being wound around one of the bifurcated extensions 15, the body of the coil being wound around the hub 12, and the final turns of the coil being wound around the other bifurcated extension.
  • One or more of the turns wound on each bifurcated extension 15 span the space between the bifurcations, and to keep the turns from spilling off they are advantageously coated with a thin layer of cement.
  • wire coated with an adhesive insulation is employed, and either immediately before or after wire is wound on the spool, the adhesive layer is activated by solvent or heat to cause bonding between adjacent turns.
  • the spool 10 with the coil 16 thereon is accommodated by a dielectric cup-shaped frame 18 comprising a planar base 20 and a cylindrical rim 22.
  • the base 20 has a central hole 24 and a pair of lateral holes 25, a circular recess 26 encompassing each of the lateral holes.
  • the lateral holes 25 have the same spatial relationship with respect to one another that the bifurcated extensions 15 of the spool 10 have to one another.
  • Each lateral hole 25 and the recess 26 therearound accommodates an electrically conducting rivet 28.
  • Each rivet 28 has a solid head 30 and a tubular shank 32, and each rivet is positioned in a hole 25 with the head in the recess 26 and the shank extending through the hole.
  • the rivets 28 are secured in place by swaging the tubular shanks 32 onto the underside of the base 20, and when so secured the tops of the heads 30 are substantially flush with the nonrecessed upper surface of the base.
  • the spool 10 with the coil 16 thereon is positioned with the flange 14 on the upper surface of the base 20, with the hub 12 overlying the central aperture 24 in the base and with one or more of the turns wrapped around the bifurcated extensions 15 overlying the heads 30 of the rivets 28.
  • the spool 10 and the base 20 advantageously include means, such as locating studs on one and receiving holes in .the other, for providing this orientation automatically.
  • One or more of the turns of wire wrapped around each bifurcated extension 15 are ultrasonically welded to the head 30 of the rivet 28 therebeneath.
  • the tip of the ultrasonic welding tool is applied to one or more of the turns of wire at the point that they extend between the bifurcations, the tip pressing the wire against the head 30 of the rivet 28.
  • Ultrasonic energy is then applied to the welding tip and the activated tip strips the insulation from the wire, removes the oxide'from the head 30, and bonds the wire to the head all in one operation.
  • Termination of the coil structure is completed with the soldering of a lead wire 34 to the underside of each rivet 28. Since the shank 32 of each rivet 28 is tubular, the underside of the rivet has a cavity therein. This cavity accommodates the end of a lead wire 34 and thereby facilitates the soldering of the lead wire to the rivet 28. Soldering of the lead wires 34 to the rivets 28 is possible because the ultrasonic welding of the coil wires to the rivets provides a metallurgical bond that is not disturbed by the heat generated in the soldering operation.
  • the cup-shaped frame 18 serves as an enclosure for the coil 16 and if desired the coil can be potted therein.
  • the hub 12 of the spool is in registration with the central opening 24 in the frame 18, a core or pole piece can be readily inserted into the hub.
  • the coil structure is readily adaptable to a number of different uses.
  • a coil structure comprising:
  • a base having a planar surface in which a pair of spaced holes are formed, the holes having a particular spatial relationship with respect to one another;
  • a spool having a flange at one end thereof that includes a pair of bifurcated extensions, the bifurcated extensions having the same spatial relationship with respect to one another that the holes in the base have to one another;
  • the wound spool being positioned on the base with the bifurcated extensions overlying the rivets and one or more of the turns of wire extending between the bifurcations of each extension being electrically connected to the top of the rivet therebeneath.
  • a coil structure as in claim 1 further including a lead wire electrically connected to the underside of each rivet.
  • a coil structure comprising:
  • a dielectric base having a planar surface in which a pair of spaced holes are formed, the holes having a particular spatial relationship with respect to one another, the base further having a recess that encompasses each hole;
  • a spool having a flange at one end thereof that includes a pair of bifurcated extensions, the bifurcated extensions having the same spatial relationship with respect to one another that the holes in the base have to one another;
  • the initial turns of the coil being wound about one of the bifurcated extensions and the final turns of the coil being wound about the other bifurcated extension, one or more of the turns being wound so that they span the space between the bifurcations.
  • the wound spool being positioned on the base with the bifurcated extensions overlying the rivets and one or more of the turnsof wire between the bifurcations of each extension being ultrasonically welded to the top of the rivet therebeneath.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Coils Or Transformers For Communication (AREA)
  • General Induction Heating (AREA)
US675909A 1967-10-17 1967-10-17 Coil structure Expired - Lifetime US3434088A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US67590967A 1967-10-17 1967-10-17

Publications (1)

Publication Number Publication Date
US3434088A true US3434088A (en) 1969-03-18

Family

ID=24712445

Family Applications (1)

Application Number Title Priority Date Filing Date
US675909A Expired - Lifetime US3434088A (en) 1967-10-17 1967-10-17 Coil structure

Country Status (7)

Country Link
US (1) US3434088A (fr)
BE (1) BE721777A (fr)
DE (1) DE1802615B2 (fr)
FR (1) FR1588433A (fr)
GB (1) GB1219291A (fr)
NL (1) NL145982B (fr)
SE (1) SE346413B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3697817A (en) * 1971-01-25 1972-10-10 Rca Corp Mounting attachment for a modular substrate
US4462016A (en) * 1982-12-03 1984-07-24 At&T Technologies, Inc. Inductor coils with mechanically coupleable bobbins
US4662572A (en) * 1982-12-03 1987-05-05 At&T Technologies, Inc. Method of forming inductor coils with mechanically coupleable bobbins
US4769625A (en) * 1985-08-22 1988-09-06 Siemens Aktiengesellschaft Electrical coil with terminal pins in adapter plate
US20040107565A1 (en) * 2002-12-10 2004-06-10 Ferrico Corporation Fixture for assembling an inductor
DE102013102242B3 (de) * 2013-03-06 2014-08-07 Kendrion (Villingen) Gmbh Kontaktvorrichtung eines ein strangförmiges Wickelgut aufnehmenden Trägers mit wenigstens einem stabförmigen Anschlusselement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1224635B (de) * 1962-04-18 1966-09-08 Max Spaleck G M B H Vorrichtung zum Trennen des Behandlungs-schleifmittels und des Antriebs von aus einem Vibrationsscheuerbehaelter ausgetragenen Werkstuecken
DE3536908A1 (de) * 1984-10-18 1986-04-24 Sanyo Electric Co., Ltd., Moriguchi, Osaka Induktivitaetselement und verfahren zur herstellung desselben

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3007125A (en) * 1958-02-20 1961-10-31 Gen Electric Inductive device
US3271760A (en) * 1962-07-13 1966-09-06 Gen Motors Corp Electromagnetic diaphragm horn

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3007125A (en) * 1958-02-20 1961-10-31 Gen Electric Inductive device
US3271760A (en) * 1962-07-13 1966-09-06 Gen Motors Corp Electromagnetic diaphragm horn

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3697817A (en) * 1971-01-25 1972-10-10 Rca Corp Mounting attachment for a modular substrate
US4462016A (en) * 1982-12-03 1984-07-24 At&T Technologies, Inc. Inductor coils with mechanically coupleable bobbins
US4662572A (en) * 1982-12-03 1987-05-05 At&T Technologies, Inc. Method of forming inductor coils with mechanically coupleable bobbins
US4769625A (en) * 1985-08-22 1988-09-06 Siemens Aktiengesellschaft Electrical coil with terminal pins in adapter plate
US20040107565A1 (en) * 2002-12-10 2004-06-10 Ferrico Corporation Fixture for assembling an inductor
DE102013102242B3 (de) * 2013-03-06 2014-08-07 Kendrion (Villingen) Gmbh Kontaktvorrichtung eines ein strangförmiges Wickelgut aufnehmenden Trägers mit wenigstens einem stabförmigen Anschlusselement

Also Published As

Publication number Publication date
BE721777A (fr) 1969-03-14
SE346413B (fr) 1972-07-03
DE1802615C3 (fr) 1974-03-07
DE1802615A1 (de) 1969-05-14
NL6814795A (fr) 1969-04-21
FR1588433A (fr) 1970-04-10
GB1219291A (en) 1971-01-13
NL145982B (nl) 1975-05-15
DE1802615B2 (de) 1973-08-09

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