US3564708A - Method of making a plated core electrical component - Google Patents
Method of making a plated core electrical component Download PDFInfo
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- US3564708A US3564708A US721313A US3564708DA US3564708A US 3564708 A US3564708 A US 3564708A US 721313 A US721313 A US 721313A US 3564708D A US3564708D A US 3564708DA US 3564708 A US3564708 A US 3564708A
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- Prior art keywords
- torous
- fin
- core
- raised
- winding
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- Expired - Lifetime
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- 238000004519 manufacturing process Methods 0.000 title abstract description 9
- 239000004020 conductor Substances 0.000 abstract description 21
- 238000000034 method Methods 0.000 abstract description 16
- 239000011248 coating agent Substances 0.000 abstract description 15
- 238000000576 coating method Methods 0.000 abstract description 15
- 238000004804 winding Methods 0.000 description 35
- 239000011162 core material Substances 0.000 description 33
- 239000000463 material Substances 0.000 description 7
- 239000011810 insulating material Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 4
- 230000008021 deposition Effects 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 239000002902 ferrimagnetic material Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012256 powdered iron Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F17/0033—Printed inductances with the coil helically wound around a magnetic core
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49169—Assembling electrical component directly to terminal or elongated conductor
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4998—Combined manufacture including applying or shaping of fluent material
- Y10T29/49982—Coating
Definitions
- Raised members are provided between at least one pair of turns of the helix.
- the torous, fin and member are coated with a conductor.
- the conductor coated fin and member are removed so that the conductive coating remaining on the torous forms a winding on the toroidal core.
- inventions which include methods for making electrical components having multi-layered windings and electrical components having a plurality of windings in which adjacent turns are in juxtaposed relationship.
- an object of this invention is to provide a method of making an electrical component which is particularly advantageous for fabricating miniature trans formers.
- Another object of the present invention is to provide a simple and economic method of manufacturing an inductive element.
- a further object of this invention is to provide a method of making an electrical component, such as a transformer, wherein windings are produced on a substrate core in a precise manner.
- Another object of the present invention is to provide a method for producing miniature inductive elements which are reliable in operation.
- the method of the present invention comprises providing a toroidal core with a raised portion including at least a helical fin.
- the toroidal core and raised portion are coated with a conductor.
- the raised conductor coated portion is removed to provide a helical conductor winding on said core.
- FIG. 1 is a perspective view of a toroidal core produced in accordance with the method of the present invention, prior to coating the core with a conductor;
- FIG. 2 is a sectional view of a portion of the core with a conductive coating thereon;
- FIG. 3 is a perspective view of the core with the winding thereon;
- FIG. 4 is a sectional view of a portion of a modified embodiment of the present invention prior to removing the raised portion of a second layer;
- FIG. 5 is a perspective view of a further modified embodiment prior to coating the same with a conductive layer.
- the method of the present invention includes the provision of a torous or a toroidal core 10 which may be made in any conventional manner.
- the torous 10 includes an upper surface 12, a lower surface 14, an outer circumferential wall 16 and an inner circumferential wall 18.
- the torous 10 may be fabricated from a ferrite material.
- the torous may contain a powdered ferroor ferri-magnetic material dispersed therethrough.
- the torous 10 may comprise a polytetrafiuoroethylene material in which is dispersed particles of magnetic material such as powdered iron or powdered ferrite.
- the raised portion which defines windings on the torous in the manner noted below. More particularly, the raised portion includes a raised fin 20 which is provided on the surfaces of the torous 10 and which winds about the torous and closes upon itself to form a closed helix or helical fin winding.
- the turn 22, which is representative of the turns which make up the helical fin winding, comprises a vertical member 24 which extends outwardly from the outer circumferential wall 16 of the torous. Extending diagonally across the upper surface 12 of the toroidal core 10 and connected to the member 24 is an arm 26 of the fin 20. Projecting inwardly and downwardly along the inner circumferential wall 18 is another vertical member 28 which connects with the arm 26. Extending diagonally across the lower surface 14 of the torous is another arm (not shown) similarly to the arm 27 which connects the member 28 with a member 30 which comprises a portion of the next turn of the helical fin winding or fin 20.
- the raised portion further includes a member or con necting portion 32 which extends outwardly from the circumferential wall 16 between two adjacent turns 34 and 36 of the fin 20. As shown in FIG. 1, the member 32 is spaced from the upper surface 12 and the lower surface 14 of the torous or toroidal core 10. When it is desired to make an inductor only one member 32 is provided on the core 10. However, when it is desired to provide a transformer having two windings another member 32 is provided between a different pair of adjacent turns of the fin 20. Additionally, if more than two windings on the transformer are desired, a number of members equal to the number of windings will be provided on the core 10. Additionally, it may be desirable to provide a device or component having a shorted winding. In this latter case no member 32 will be provided.
- the core 10 and the raised portion which includes the fin 20 and the member or members 32 may be molded integrally utilizing any one of the known molding techniques now available. Alternatively, the torous or toroidal core 10 may be manufactured separately and the raised portions including the fin 20 and the member or members 32 may be later molded on the torous 10.
- the torous and the raised portions thereon are then coated with a conductive coating by any convenient method.
- the toroidal core including the raised fin 20 and the member or members 32 may be coated by the electroless deposition of a conducting material such as copper or silver. Thereafter, a coating of another film of conductive material may be electroplated thereon in the usual manner.
- the conductive layer of material may be deposited on the core and raised portions by the use of sputter techniques. Inasmuch as the entire structure including the core 10 and the raised portions are subjected to the deposition of the conductive coating, the conduc tive coating 38 (FIG. 2) will cover the entire surface f the core 10, fin 20 and member 32.
- the raised fin 20 and member or members 32 may be coated with a insulating material prior to the deposition of the conductive layer thereon.
- the device illustrated n FIG. 1 may be placed in a fluidized bed to coat the same with a layer of insulating material. Then the conductive layer 38 of copper or silver, for example, may be coated thereon.
- the raised fin 20 and the member 32 or, when the device is utilized as a transformerthe members 32, including their associated conductive layers 38, are removed from the torous or toroidal core 10. More specifically, the raised portions may be removed, in whole or in part, in any conventional manner as by a grinding or a tumbling process, or the like. It shouldbe noted that the raised members need not be removed in whole, it being sufiicient that the surface including the conductive layers on these portions are removed. Thus, as shown in FIG. 3, the removal of the fin 20 leaves a continuous space 40 between the layer of conducting material '38. Thus, the material 38 winds about the torous 10 in the shape of a helix thereby to define a helical Winding on the torous 10.
- the removal of the member 32 leaves a space 42 between the sections 38A and 38B of the conductive layer 38 to define the ends of the winding.
- leads 43 and 44 may be connected to the respective ends 38A "and 38B of the winding in any conventional manner, as by soldering or welding the leads thereto, so that the inductive element may be connected easily to an external circuit.
- another member 32 would have been positioned adjacent to other turns of the fin 20 so that another space 42 would exist between sections of the conductive layer 38 to define thereby two windings on the core 10.
- Appropriate leads may be connected to the ends of all windings 'so that the primary and the secondary windings of the transformer may be utilized in an external circuit in the conventional manner.
- FIG. 4 illustrate a sectional view of a modified embodiment of the invention which includes multi-layered windings.
- the embodiment of FIG. 3 is'provided with an insulating coating of material 45 having raised portions thereon which include a continuous helical fin 20' and a member (not shown) between'adjacent turns similarly to the member 32.
- This layer is then provided with a conductive coating 38' by, for example, any of the methods noted above.
- the fin 20 and associated members interconnecting adjacent turns of the fin 20' are removed to define a second winding on the torous 10.
- Appropriate leads then may be connected to the ends of the winding so defined to provide a transformer having multi-layered windings, it being understood that the leads 43 and 44 connected to the winding or layer of conductive material 38 extend through the layer of insulating material 45.
- FIG. illustrates a substrate 50 prior to the application of a conductive coating thereto.
- the substrate 50 includes a torous 52 which may be 4 will be in juxtaposition to a respective turn of the helical fin 56.
- a member 58 is provided on the outer circumferential wall of the torous 52 that extends from one turn of the helical fin 54, past the adjacent turn of the helical fin 56, to the next adjacent turn of the fin 54.
- the raised member 58 is spaced from the upper and lower surfaces of the torous.
- the fins 54, 56 and the member 58 may be molded on the torous 52 in the manner noted above, or the elements may be molded as a unitary structure.
- the substrate is coated with a conductive material and thereafter the fins 54, 56 and the member 58 are removed in a manner similar to that noted above in conjunction with-the-embodiment of FIGS. 1-3. Accordingly the removal of the conductor coated fins 54, 56 and the member 58 define a double winding on the torous 52 wherein adjacent turns of one winding are in juxtaposition to respective turns of the other winding. Thereafter, ap limbate leads may be connected to the ends of the windings so that the device may be utilized in a circuit.
- a method of making an electronic component comprising providing a substantially non-conducting toroidal core with a raised portion which includes at least a helical fin, coating said toroidal core and fin with a conductor, removing said raised portion to provide a conductor winding on said core, said raised portion including at least one raised member on the circumference of said toroidal core which extends between two adjacent turns of said fin, said method including coatingsaid member with a conductor simultaneously with said fin and said core, and removing said.
- said raised portion including a pair of raised helical fins having juxtaposed adjacent turns, said member being sized and positioned to extend between adjacent turns of one of said pair of helical fins, said method comprising the further steps of coating said core with the conductor winding thereon with a layer of insulating material, providing a raised portion on said layer of insulating material which includes a helical fin and at least a raised member which extends between two adjacent turns of said fin, coating said insulating layer and said raised portion with an elec- 3 trical conductor, and removing said conductor coated fin a respective lead to each end of said winding.
- each turn of the helical fin 54 References Cited UNITED STATES PATENTS 1,767,715 6/1930 Stoekle 29-602X 1,994,767 3/ 1935 Heintz 336--229X 3,027,526 3/1962 Patka et a1 336-229X 3,123,787 3/1964 Shifrin 336229 3,133,249 5/1964 Parker 336200X 3,319,207 5/ 1967 Davis 336229 JOHN F. CAMPBELL, Primary Examiner C. E. HALL, Assistant Examiner US. 01. X.R. 29 -s27.2, 602; 336-208, 221,229
Abstract
A METHOD OF MAKING AN ELECTRICAL COMPONENT INCLUDING PROVIDING A TOROUS WITH A RAISED PORTION INCLUDING A FIN WHICH WINDS ABOUT THE TOROUS TO FORM A HELIX. RAISED MEMBERS ARE PROVIDED BETWEEN AT LEAST ONE PAIR OF TURNS OF THE HELIX. THE TOROUS, FIN AND MEMBER ARE COATED WITH A CONDUCTOR. THE CONDUCTOR COATED FIN AND MEMBER ARE REMOVED SO THAT THE CONDUCTIVE COATING REMAINING ON THE TOROUS FORMS A WINDING ON THE TOROIDAL CORE. OTHER EMBODIMENTS ARE DISCLOSED WHICH INCLUDE METHODS FOR MAKING ELECTRICAL COMPONENTS HAVING MULTI-LAYERED WINDINGS AND ELECTRICAL COMPONENTS HAVING A PLURALITY OF WINDINGS IN WHICH ADJACENT TURNS ARE IN JUXTAPOSED RELATIONSHIP.
Description
F eb.23, 1971 .LQ'HARRIS 3,564,108"
METHOD O MAKING A PLATED 001m ELECTRICAL CQMPONENT I Filed Aprnis. 1968 I zsheetfs-sheet 1 ATTORNEYS INVENTOR. John (I. am:
Feb, 23,1971 c. HARRIS? 3,564,703
METHODIOF MAKING} PLATED CO RE-ELECTRICAL COMPONENT Filed April 1.5, 1968 2 sheets sheet 2 United States Patent Ofice 3,564,708 METHOD OF MAKING A PLATED CORE ELECTRICAL COMPONENT John C. Harris, Durham, N.C., assignor to Technitrol, Inc., Philadelphia, Pa., a corporation of Pennsylvania Filed Apr. 15, 1968, Ser. No. 721,313 Int. Cl. H01f 7/06 U.S. Cl. 29-606 2 Claims ABSTRACT OF THE DISCLOSURE A method of making an electrical component including providing a torous with a raised portion including a fin which winds about the torous to form a helix. Raised members are provided between at least one pair of turns of the helix. The torous, fin and member are coated with a conductor. The conductor coated fin and member are removed so that the conductive coating remaining on the torous forms a winding on the toroidal core.
Other embodiments are disclosed which include methods for making electrical components having multi-layered windings and electrical components having a plurality of windings in which adjacent turns are in juxtaposed relationship.
. terms of both time and money.
Accordingly, an object of this invention is to provide a method of making an electrical component which is particularly advantageous for fabricating miniature trans formers.
Another object of the present invention is to provide a simple and economic method of manufacturing an inductive element.
A further object of this invention is to provide a method of making an electrical component, such as a transformer, wherein windings are produced on a substrate core in a precise manner.
Another object of the present invention is to provide a method for producing miniature inductive elements which are reliable in operation.
Accordingly, the method of the present invention comprises providing a toroidal core with a raised portion including at least a helical fin. The toroidal core and raised portion are coated with a conductor. The raised conductor coated portion is removed to provide a helical conductor winding on said core.
Other features and advantages of the present invention will become more apparent from a consideration of the following detailed description when taken in conjunction with the accompanying drawing, in which:
FIG. 1 is a perspective view of a toroidal core produced in accordance with the method of the present invention, prior to coating the core with a conductor;
FIG. 2 is a sectional view of a portion of the core with a conductive coating thereon;
FIG. 3 is a perspective view of the core with the winding thereon;
FIG. 4 is a sectional view of a portion of a modified embodiment of the present invention prior to removing the raised portion of a second layer; and
3,564,708 Patented Feb. 23, 1971 FIG. 5 is a perspective view of a further modified embodiment prior to coating the same with a conductive layer.
The method of the present invention includes the provision of a torous or a toroidal core 10 which may be made in any conventional manner. The torous 10 includes an upper surface 12, a lower surface 14, an outer circumferential wall 16 and an inner circumferential wall 18. By way of example, the torous 10 may be fabricated from a ferrite material. Alternatively, the torous may contain a powdered ferroor ferri-magnetic material dispersed therethrough. To be more specific, the torous 10 may comprise a polytetrafiuoroethylene material in which is dispersed particles of magnetic material such as powdered iron or powdered ferrite.
Provided on the surface of the torous 10 is a raised portion which defines windings on the torous in the manner noted below. More particularly, the raised portion includes a raised fin 20 which is provided on the surfaces of the torous 10 and which winds about the torous and closes upon itself to form a closed helix or helical fin winding. The turn 22, which is representative of the turns which make up the helical fin winding, comprises a vertical member 24 which extends outwardly from the outer circumferential wall 16 of the torous. Extending diagonally across the upper surface 12 of the toroidal core 10 and connected to the member 24 is an arm 26 of the fin 20. Projecting inwardly and downwardly along the inner circumferential wall 18 is another vertical member 28 which connects with the arm 26. Extending diagonally across the lower surface 14 of the torous is another arm (not shown) similarly to the arm 27 which connects the member 28 with a member 30 which comprises a portion of the next turn of the helical fin winding or fin 20.
The raised portion further includes a member or con necting portion 32 which extends outwardly from the circumferential wall 16 between two adjacent turns 34 and 36 of the fin 20. As shown in FIG. 1, the member 32 is spaced from the upper surface 12 and the lower surface 14 of the torous or toroidal core 10. When it is desired to make an inductor only one member 32 is provided on the core 10. However, when it is desired to provide a transformer having two windings another member 32 is provided between a different pair of adjacent turns of the fin 20. Additionally, if more than two windings on the transformer are desired, a number of members equal to the number of windings will be provided on the core 10. Additionally, it may be desirable to provide a device or component having a shorted winding. In this latter case no member 32 will be provided.
The core 10 and the raised portion which includes the fin 20 and the member or members 32 may be molded integrally utilizing any one of the known molding techniques now available. Alternatively, the torous or toroidal core 10 may be manufactured separately and the raised portions including the fin 20 and the member or members 32 may be later molded on the torous 10.
The torous and the raised portions thereon are then coated with a conductive coating by any convenient method. For example, in constructing the Winding of this invention, the toroidal core including the raised fin 20 and the member or members 32 may be coated by the electroless deposition of a conducting material such as copper or silver. Thereafter, a coating of another film of conductive material may be electroplated thereon in the usual manner. Alternatively, the conductive layer of material may be deposited on the core and raised portions by the use of sputter techniques. Inasmuch as the entire structure including the core 10 and the raised portions are subjected to the deposition of the conductive coating, the conduc tive coating 38 (FIG. 2) will cover the entire surface f the core 10, fin 20 and member 32.
Since, in practice, a ferrite material is used for the core 10, no insulation is required between the core and the conductive winding. However, in many applications the impedance of the core material may not be sufficiently high and, accordingly, there will be leakage between turns of the finished component. In order to prevent such occurrences the core 10 and, therefore, the raised fin 20 and member or members 32 may be coated with a insulating material prior to the deposition of the conductive layer thereon. For example, the device illustrated n FIG. 1 may be placed in a fluidized bed to coat the same with a layer of insulating material. Then the conductive layer 38 of copper or silver, for example, may be coated thereon.
Thereafter, the raised fin 20 and the member 32 or, when the device is utilized as a transformerthe members 32, including their associated conductive layers 38, are removed from the torous or toroidal core 10. More specifically, the raised portions may be removed, in whole or in part, in any conventional manner as by a grinding or a tumbling process, or the like. It shouldbe noted that the raised members need not be removed in whole, it being sufiicient that the surface including the conductive layers on these portions are removed. Thus, as shown in FIG. 3, the removal of the fin 20 leaves a continuous space 40 between the layer of conducting material '38. Thus, the material 38 winds about the torous 10 in the shape of a helix thereby to define a helical Winding on the torous 10. Additionally, the removal of the member 32 leaves a space 42 between the sections 38A and 38B of the conductive layer 38 to define the ends of the winding. Thereafter, leads 43 and 44 may be connected to the respective ends 38A "and 38B of the winding in any conventional manner, as by soldering or welding the leads thereto, so that the inductive element may be connected easily to an external circuit. As noted hereinabove, if the device shown in FIG. 3 is to be utilized as a transformer, another member 32 would have been positioned adjacent to other turns of the fin 20 so that another space 42 would exist between sections of the conductive layer 38 to define thereby two windings on the core 10. Appropriate leads may be connected to the ends of all windings 'so that the primary and the secondary windings of the transformer may be utilized in an external circuit in the conventional manner. I
FIG. 4 illustrate a sectional view of a modified embodiment of the invention which includes multi-layered windings. Accordingly, the embodiment of FIG. 3 is'provided with an insulating coating of material 45 having raised portions thereon which include a continuous helical fin 20' and a member (not shown) between'adjacent turns similarly to the member 32. This layer is then provided with a conductive coating 38' by, for example, any of the methods noted above. The fin 20 and associated members interconnecting adjacent turns of the fin 20' are removed to define a second winding on the torous 10. Appropriate leads then may be connected to the ends of the winding so defined to provide a transformer having multi-layered windings, it being understood that the leads 43 and 44 connected to the winding or layer of conductive material 38 extend through the layer of insulating material 45.
A further modified embodiment of the present invention is shown in FIG. which illustrates a substrate 50 prior to the application of a conductive coating thereto. The substrate 50 includes a torous 52 which may be 4 will be in juxtaposition to a respective turn of the helical fin 56.
A member 58 is provided on the outer circumferential wall of the torous 52 that extends from one turn of the helical fin 54, past the adjacent turn of the helical fin 56, to the next adjacent turn of the fin 54. Similarly to the member 32, the raised member 58 is spaced from the upper and lower surfaces of the torous.
The fins 54, 56 and the member 58 may be molded on the torous 52 in the manner noted above, or the elements may be molded as a unitary structure.
The substrate is coated with a conductive material and thereafter the fins 54, 56 and the member 58 are removed in a manner similar to that noted above in conjunction with-the-embodiment of FIGS. 1-3. Accordingly the removal of the conductor coated fins 54, 56 and the member 58 definea double winding on the torous 52 wherein adjacent turns of one winding are in juxtaposition to respective turns of the other winding. Thereafter, ap propriate leads may be connected to the ends of the windings so that the device may be utilized in a circuit.
Accordingly, a simple and economic method has been described for producing so-called miniature electrical components. e
Whilepreferred methods of the invention have been shown-and described herein, it will become obvious that numerous omissions, changes and additions may be made in such methods without departing from the spirit and scope of the present invention. a
What is claimed is:
1. A method of making an electronic component comprising providing a substantially non-conducting toroidal core with a raised portion which includes at least a helical fin, coating said toroidal core and fin with a conductor, removing said raised portion to provide a conductor winding on said core, said raised portion including at least one raised member on the circumference of said toroidal core which extends between two adjacent turns of said fin, said method including coatingsaid member with a conductor simultaneously with said fin and said core, and removing said. conductor coated member along with said fin to produce the ends of said conductor winding, said raised portion including a pair of raised helical fins having juxtaposed adjacent turns, said member being sized and positioned to extend between adjacent turns of one of said pair of helical fins, said method comprising the further steps of coating said core with the conductor winding thereon with a layer of insulating material, providing a raised portion on said layer of insulating material which includes a helical fin and at least a raised member which extends between two adjacent turns of said fin, coating said insulating layer and said raised portion with an elec- 3 trical conductor, and removing said conductor coated fin a respective lead to each end of said winding.
fabricated from any of the materials noted above rela- 7 tive to the torous 10. Provided on the torous are a pair of raised fins 54 and 56 which wind about the torous 52 and form a pair of closed helices in a manner similar to the raised fin 20. Thus, each turn of the helical fin 54 References Cited UNITED STATES PATENTS 1,767,715 6/1930 Stoekle 29-602X 1,994,767 3/ 1935 Heintz 336--229X 3,027,526 3/1962 Patka et a1 336-229X 3,123,787 3/1964 Shifrin 336229 3,133,249 5/1964 Parker 336200X 3,319,207 5/ 1967 Davis 336229 JOHN F. CAMPBELL, Primary Examiner C. E. HALL, Assistant Examiner US. 01. X.R. 29 -s27.2, 602; 336-208, 221,229
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US72131368A | 1968-04-15 | 1968-04-15 |
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US3564708A true US3564708A (en) | 1971-02-23 |
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US721313A Expired - Lifetime US3564708A (en) | 1968-04-15 | 1968-04-15 | Method of making a plated core electrical component |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3815069A (en) * | 1971-01-28 | 1974-06-04 | Fiat Spa | Process for the manufacture of electrical coils |
DE2639976A1 (en) * | 1975-09-08 | 1977-03-31 | Sciaky Intertechnique | RING CORE TRANSFORMER |
US4188603A (en) * | 1978-07-26 | 1980-02-12 | Permacor, Inc. | Inductor with conducting core of sintered powdered metal |
US4253231A (en) * | 1977-01-13 | 1981-03-03 | Compagnie Industrielle Des Telecommunications Cit-Alcatel | Method of making an inductive circuit incorporated in a planar circuit support member |
US4763072A (en) * | 1985-06-07 | 1988-08-09 | Kabushikikaisha Tokyo Keiki | Magnetic azimuth detector |
US4878291A (en) * | 1987-04-30 | 1989-11-07 | Harada Kogyo Kabushiki Kaisha | Method of manufacturing toroidal coils |
US5083101A (en) * | 1990-01-03 | 1992-01-21 | Integrated Power Components | Integrated electromagnetic interference filter |
EP0490438A1 (en) * | 1990-12-14 | 1992-06-17 | Koninklijke Philips Electronics N.V. | Inductive device comprising a toroidal core |
US20160351311A1 (en) * | 2014-02-06 | 2016-12-01 | Hitachi, Ltd. | Superconducting coil |
US10714257B2 (en) * | 2017-06-21 | 2020-07-14 | Hioki Denki Kabushiki Kaisha | Winding bobbin and winding component |
-
1968
- 1968-04-15 US US721313A patent/US3564708A/en not_active Expired - Lifetime
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3815069A (en) * | 1971-01-28 | 1974-06-04 | Fiat Spa | Process for the manufacture of electrical coils |
DE2639976A1 (en) * | 1975-09-08 | 1977-03-31 | Sciaky Intertechnique | RING CORE TRANSFORMER |
US4024370A (en) * | 1975-09-08 | 1977-05-17 | Sciaky Bros., Inc. | Toroidal resistance welding transformer |
US4253231A (en) * | 1977-01-13 | 1981-03-03 | Compagnie Industrielle Des Telecommunications Cit-Alcatel | Method of making an inductive circuit incorporated in a planar circuit support member |
US4188603A (en) * | 1978-07-26 | 1980-02-12 | Permacor, Inc. | Inductor with conducting core of sintered powdered metal |
US4763072A (en) * | 1985-06-07 | 1988-08-09 | Kabushikikaisha Tokyo Keiki | Magnetic azimuth detector |
US4878291A (en) * | 1987-04-30 | 1989-11-07 | Harada Kogyo Kabushiki Kaisha | Method of manufacturing toroidal coils |
US5083101A (en) * | 1990-01-03 | 1992-01-21 | Integrated Power Components | Integrated electromagnetic interference filter |
EP0490438A1 (en) * | 1990-12-14 | 1992-06-17 | Koninklijke Philips Electronics N.V. | Inductive device comprising a toroidal core |
US5214403A (en) * | 1990-12-14 | 1993-05-25 | U.S. Philips Corporation | Inductive device comprising a toroidal core |
US20160351311A1 (en) * | 2014-02-06 | 2016-12-01 | Hitachi, Ltd. | Superconducting coil |
US10714257B2 (en) * | 2017-06-21 | 2020-07-14 | Hioki Denki Kabushiki Kaisha | Winding bobbin and winding component |
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