US3545080A - Method of making resilient pins - Google Patents

Method of making resilient pins Download PDF

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Publication number
US3545080A
US3545080A US642639A US3545080DA US3545080A US 3545080 A US3545080 A US 3545080A US 642639 A US642639 A US 642639A US 3545080D A US3545080D A US 3545080DA US 3545080 A US3545080 A US 3545080A
Authority
US
United States
Prior art keywords
pin
stock
resilient
section
bar
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
US642639A
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English (en)
Inventor
William Robert Evans
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.)
TE Connectivity Corp
Original Assignee
AMP 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 AMP Inc filed Critical AMP Inc
Application granted granted Critical
Publication of US3545080A publication Critical patent/US3545080A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/306—Lead-in-hole components, e.g. affixing or retention before soldering, spacing means
    • H05K3/308—Adaptations of leads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/04—Pins or blades for co-operation with sockets
    • H01R13/05—Resilient pins or blades
    • H01R13/052—Resilient pins or blades co-operating with sockets having a circular transverse section
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending
    • 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
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/45—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock]
    • Y10T24/45225—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock] including member having distinct formations and mating member selectively interlocking therewith
    • Y10T24/45471—Projection having movable connection between components thereof or variable configuration
    • Y10T24/45524—Projection having movable connection between components thereof or variable configuration including resiliently biased projection component or surface segment
    • Y10T24/45545—Projection having movable connection between components thereof or variable configuration including resiliently biased projection component or surface segment forming total external surface of projection
    • 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
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/45—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock]
    • Y10T24/45225—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock] including member having distinct formations and mating member selectively interlocking therewith
    • Y10T24/45471—Projection having movable connection between components thereof or variable configuration
    • Y10T24/45524—Projection having movable connection between components thereof or variable configuration including resiliently biased projection component or surface segment
    • Y10T24/45545—Projection having movable connection between components thereof or variable configuration including resiliently biased projection component or surface segment forming total external surface of projection
    • Y10T24/4555—Projection having movable connection between components thereof or variable configuration including resiliently biased projection component or surface segment forming total external surface of projection and encircling hollow central area
    • 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
    • Y10T29/49204—Contact or terminal manufacturing
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12326—All metal or with adjacent metals with provision for limited relative movement between components

Definitions

  • Prior art posts are generally rectangular or circular in cross-section and are solid, non-resilient members.
  • the posts mate with resilient sockets or eyelets.
  • the invention provides a method of producing a pin having resilient properties.
  • the basic advantage of such a pin is that it can mate with a stiff socket or eyelet.
  • a pin could make electrical connection with a printed circuit board by simply drilling a hole in the board and plating the hole. The electrical contact would be provided by the resilience of the pin so no special socket or the like is required on the board.
  • the pin can be produced with no scrap and a natural lead-in is formed for ease in mating.
  • FIG. 1 is a perspective view of the length of bar stock
  • FIG. 2 is a perspective view showing the bar of FIG. 1 subsequent to a forming operation
  • FIG. 3 is a perspective view showing the bar of FIG. 2 after a subsequent forming operation
  • FIG. 3A is a cross-sectional view taken along the line 3A-3A of FIG. 3;
  • FIG. 4 is a perspective view showing an alternative method of production
  • FIG. 4A is a cross-sectional view of a pin similar to that shown in FIG. 4;
  • FIG. 5 is a perspective view showing the pin of FIG. 4 after a subsequent forming operation
  • FIG. 5A is a cross-sectional view taken along the line 5A5A of FIG. 5;
  • FIG. 6 is a view partly in section showing a typical application of a pin made according to the present invention.
  • FIG. 7 is a cross-sectional view showing the mating action between a socket and the pin of the instant invention.
  • FIG. 8 is a perspective view of a length of flat stock used in a further embodiment of the invention.
  • FIG. 9 is a perspective view of a pin formed from the stock of FIG. 8;
  • FIG. 10 is a cross-sectional view taken along the line 12-12 of FIG. 9;
  • FIG. 11 is a perspective view of a length of flat stock used in another embodiment of the invention.
  • FIG. 12 is a perspective view of a pin formed from the stock of FIG. 11;
  • FIG. 13 is a perspective view partly broken away showing details of the pin of FIG. 12;
  • FIG. 14 is a cross-sectional view taken along the line 1616 of FIG. 12;
  • FIG. 15 is an exploded perspective view showing a further form of pin being produced from flat stock
  • FIG. 16 is a plan view of an etched circuit embodying the present invention.
  • FIG. 17 is an exploded perspective view showing the present invention applied to an integrated circuit module.
  • a pin according to the present invention is produced from a length of bar stock such as shown in FIG. 1 and indicated at 10.
  • the bar may be of rectangular, circular or other cross-sectional configuration.
  • a bar of circular cross-section has been shown, such bar being of generally uniform cross-sectional area throughout the major portion of its length.
  • the pin 10 is normally formed of a metallic material which is electrically conductive and of any suitable length and cross-sectional area.
  • the first step in the production of the pin is to substantially flatten a section of the pin as indicated at 12.
  • the flattened section 12 may then be formed into a generally U-shaped section as shown in FIGS. 3 and 3A whereby a section 14 is produced which is capable of resilient flexing action.
  • the periphery of section 14 is greater than that of the remainder of pin 10 and therefore the pin can mate with an eyelet or socket just slightly larger than the non-resilient portion of the pm.
  • FIG. 4 An alternative method of producing the pin is shown in FIG. 4 wherein the flattened portion 12 is provided with a blanked out slot 16.
  • the pin shown in FIG. 4 may then be formed by turning the strips 18 and 20 at substantially right angles to the plane of the flattened portion 12 into a position as shown in FIGS. 5 and 5A.
  • the strips 18 and 20 may be given a generally arcuate configuration during the forming operation.
  • the spring section 22 thus produced in the pin has considerably more resiliency than the section 14 formed in the pin of FIG. 3 since the strips 18 and 20 are substantially free for resilient movement toward and away from each other.
  • the forming operations performed on the pin may be accomplished by conventional forming tools and may be accomplished in either the hot or cold material state.
  • FIG. 4A illustrates a pin in its final form which is quite similar to the pin of FIG. 4.
  • the flattened section 12' is not flattened to the extent of section 12 (FIG. 4) leaving strips 18 and 20' capable of flexing motion through the slot 16'.
  • the degree to which the section 12' is flattened depends on the amount of resiliency required and on the desired external dimension of the section since an extremely flattened section would have low resiliency and a large external dimension and vice versa.
  • the section can, of course, be adjusted to size by manipulating the strips 18' and 20'.
  • the pins of the present invention have general utility in mechanical and electrical applications.
  • One application of the pins is shown in FIG. 6 wherein the pin 30 is mounted in a housing member 32 and cooperates with an aperture 34 formed in a printed circuit board or the like 36.
  • the aperture 34 is plated at 38 with an electrically conductive material, which plating extends as shown at 38' to additional circuitry on the printed circuit board.
  • FIG. 7 wherein a pair of pine 30a and 30b are shown in relation to a pair of sockets 38a and 38b.
  • Pin 30a is just entering socket 38a while pin 30b is seated within the socket 38b and the resilient section of the pin has been compressed by the socket.
  • the resilient pin section will maintain the pin in position and will also provide for an excellent electrical connection between the pin and socket.
  • the present invention is not limited to stock having a circular cross-section but rather the principle of a resilient pin, that is a pin having a spring section, may be applied to fiat stock as well as round.
  • the following description teaches various methods of producing a resilient pin from flat stock.
  • FIG. 8 there is shown a strip of flat stock 40 from which a resilient pin is to be produced.
  • the stock 40 has a central slot 42 and a pair of edge slots 44 formed therein, the edge slots 44 being approximately one-half of the central slot 42.
  • the slots may be formed in the stock by a stamping operation, by chemical etching or by other convenient methods.
  • the forward portion of the stock is charfered at 46 to provide lead-in for the pin as will be apparent as this description proceeds.
  • the remaining portion of stock 40 is not shown in FIG. 8 but would be connected, in practice, to electrically conductive means according to the particular application made of the resilient pin.
  • a pin 50 is shown which has been formed b the flat stock 40 after having been rolled into a cylindrical configuration.
  • the pin is rolled about an axis generally parallel to the major extent of the slots 42 and 44 thereby producing the pair of resilient members 52 on opposite sides of the slot.
  • the members 52 are bowed outwardly to present a diameter larger than that of the main portion of the pin.
  • the bowing operation may be performed simultaneously with the rolling operation or may be a separate step achieved by a mandrel or the like.
  • the chamfered edge 46 of the pin can thus be seen to provide appropriate lead-in for the pins entry into a mating receptacle.
  • FIG. 11 there is shown a blank of flat stock 54 which is similar to the stock 40 shown in FIG. 8.
  • Stock 54 has formed therein two central slots 56 and 58 and two edge slots 60. By providing two central slots the contact will produce three spring members 62 rather than two as formed in the pin of FIG. 9.
  • a pin '64 is shown which represents the formed-up configuration of the flat stock 54.
  • the pin 64 differs from the pin 50 previously described by the provision of the three spring members 62.
  • the three spring members permit a greater force to be exerted in a radially outward direction than could be exerted by the two spring members and thus yields a pin which is capable of improved mechanical retention in a socket and improved electrical mating characteristics.
  • the three spring members 62 are disposed at approximately 120 from each other as best seen in FIGS. 13 and 14 and provide equal distribution of forces between the pin and its mating receptacle.
  • FIG. 15 there is shown a pin 66 which has been blanked or stamped from a piece of fiat stock 68.
  • the pin is formed by stamping a generally oval piece 70 from the center of the stock and also stamping a pair of edge portions 72 which surround the oval portion 70 but are slightly spaced therefrom in order to produce the pair of resilient members 74.
  • the pin 66 needs no subsequent forming operation since the surved spring members 74 will function in their flat condition.
  • This version of the pin in most instances, will exert lower radial forces as compared to the pins of FIGS. 9 and 12.
  • Pin 66 is primarily useful for mechanical retention and may be soldered or otherwise connected to a mating receptacle in order to complete an electrical connection.
  • FIG. 16 shows a typical etched circuit for use in an integrated circuit or flat pack such as 76 shown in FIG. 17.
  • the circuitry of FIG. 16 is shown as including the teachings of the present invention in that the outer ends of each circuitry strip is provided with a resilient pin as indicated at 78.
  • the circuitry of FIG. 18 is secured to an integrated circuit in a manner well known in the art and the pin portions 78 are bent at 90 as seen in FIG. 19 to enable the fiat pack to be plugged into appropriate sockets 80 disposed in a printed circuit board or the like 82.
  • the sockets 80 for receiving the pins 78 may be circular as shown in the figure or may be of rectangular configuration.
  • sockets in their simplest form may merely be plated through holes consisting of a metallic liner 84 which connects with external circuitry on the board 82.
  • the pins 78 will be received in the socket and will be pressed inwardly to cause a firm mechanical union between the pin and socket. If desired, the pin may then be soldered to the socket.
  • a method of producing a resilient pin from a bar of substantially uniform cross-section comprising the steps of forming an intermediate portion of said bar into a substantially flattened condition whereby material is forced beyond the lateral periphery of said bar, forming an elongated slot in said flattened portion only, said slot being formed on and parallel to the axis of said bar, subsequently turning the flattened material on both sides of the slot in opposite directions and into confronting walls in parallel relation and on opposite sides of the bar axis and bowing the opposite walls outwardly beyond the periphery of the bar thereby constituting resilient members integral between the bar ends capable of flexing motion toward and away from each other.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Multi-Conductor Connections (AREA)
US642639A 1967-05-16 1967-05-16 Method of making resilient pins Expired - Lifetime US3545080A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US64263967A 1967-05-16 1967-05-16

Publications (1)

Publication Number Publication Date
US3545080A true US3545080A (en) 1970-12-08

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US (1) US3545080A (xx)
BE (1) BE710170A (xx)
DE (1) DE1615691A1 (xx)
ES (1) ES349844A1 (xx)
FR (1) FR1552602A (xx)
GB (1) GB1158738A (xx)
NL (1) NL6801694A (xx)

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US3663930A (en) * 1970-12-17 1972-05-16 Amp Inc Disengageable electrical connector
US3675320A (en) * 1967-09-02 1972-07-11 Kawai Gakki Susakusho Kk Electric contact member
US3761871A (en) * 1971-05-28 1973-09-25 L Teurlings Electrical connector
US3824554A (en) * 1972-08-28 1974-07-16 G Shoholm Spring-type press-fit
US3827004A (en) * 1972-05-10 1974-07-30 Du Pont Circuit board pin
US3899719A (en) * 1973-08-30 1975-08-12 Electronic Molding Corp Integrated circuit panel and dual in-line package for use therewith
DE2541222A1 (de) * 1974-12-19 1976-07-01 Elfab Corp Kontaktvorrichtung
DE2656736A1 (de) * 1975-12-16 1977-07-07 Litton Industries Inc Loetfreier elektrischer kontakt
US4191440A (en) * 1978-09-19 1980-03-04 Bell Telephone Laboratories, Incorporated Electrical connector for coupling power leads to circuit boards
US4513499A (en) * 1982-11-15 1985-04-30 Frank Roldan Method of making compliant pins
DE3430849A1 (de) * 1984-08-22 1986-03-06 Gerd 7742 St Georgen Kammerer Verfahren zur raeumlichen ausweitung der elektrischen verbindung zwischen den anschlusskontakten hochintegrierter elektronischer bauelemente und den kontaktstellen einer elektrischen anschlussvorrichtung auf einem bauelementetraeger
US4720268A (en) * 1987-03-23 1988-01-19 Industrial Electronic Hardware Compliant conductive pin
EP0255093A2 (en) * 1986-07-28 1988-02-03 GTE Products Corporation Electrical connector with compliant section
US4748841A (en) * 1985-04-17 1988-06-07 Alcatel N.V. Method of producing an electric contact pin for printed circuit boards, and die for carrying out the method
US4769907A (en) * 1987-07-27 1988-09-13 Northern Telecom Limited Method of making a circuit board pin
US4774763A (en) * 1986-08-27 1988-10-04 Methode Electronics, Inc. Electrical contact with compliant mounting section
US4776807A (en) * 1983-09-06 1988-10-11 Methode Electronics, Inc. Compliant contact
US4797113A (en) * 1987-02-05 1989-01-10 Lambert Roger T Board to board flexible pin
US4826456A (en) * 1987-12-16 1989-05-02 Gte Products Corporation Electrical connector with compliant section
US4836806A (en) * 1983-10-24 1989-06-06 Microdot Inc. Pin connector
US4906198A (en) * 1988-12-12 1990-03-06 International Business Machines Corporation Circuit board assembly and contact pin for use therein
US4908942A (en) * 1984-01-31 1990-03-20 Amp Incorporated Method of making an electrical terminal
US4909746A (en) * 1989-05-31 1990-03-20 Amp Incorporated Contact for stackable electrical connector
EP0373428A2 (en) * 1988-12-14 1990-06-20 International Business Machines Corporation Pin with tubular elliptical compliant portion and method for affixing to mating receptacle
US5199908A (en) * 1992-07-16 1993-04-06 Amp Incorporated Electrical contact
US5329697A (en) * 1992-10-15 1994-07-19 Positronic Industries, Inc. Method and apparatus for turning a concave cut in a workpiece
US5411404A (en) * 1993-10-29 1995-05-02 The Whitaker Corporation Electrical connector having bus bars providing circuit board retention
US5411418A (en) * 1993-09-01 1995-05-02 Itt Corporation Repairable solderless connector arrangement
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US5878483A (en) * 1995-06-01 1999-03-09 International Business Machines Corporation Hammer for forming bulges in an array of compliant pin blanks
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US6297942B1 (en) * 1997-09-05 2001-10-02 Morata Manufacturing Co., Ltd Metal terminal and electronic component including same
US6406338B1 (en) * 1999-07-08 2002-06-18 Yazaki Corporation Board terminal and method of producing same
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US20060285279A1 (en) * 2005-03-15 2006-12-21 Medconx, Inc. Micro solder pot
US20100013085A1 (en) * 2008-07-18 2010-01-21 Mitsubishi Electric Corporation Power semiconductor device
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USD665744S1 (en) * 2010-09-28 2012-08-21 Adamant Kogyo Co., Ltd. Optical fiber connector
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US20120289102A1 (en) * 2011-05-11 2012-11-15 Tyco Electronics Corporation Contact having a profiled compliant pin
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US20150044918A1 (en) * 2013-08-09 2015-02-12 Dai-Ichi Seiko Co., Ltd. Press-fit type connector terminal and method of fabricating the same
USD751042S1 (en) 2014-02-17 2016-03-08 Molex, Llc Terminal fitting
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USD762587S1 (en) 2014-02-17 2016-08-02 Molex, Llc Terminal fitting
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US680373A (en) * 1899-11-06 1901-08-13 Cons Fastener Company Stud for fasteners.
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US1376735A (en) * 1919-07-08 1921-05-03 Stalhane Otto Contact-pin for connecting-plugs and process for the manufacture thereof
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US2032017A (en) * 1935-12-16 1936-02-25 Hubbard & Co Sheet metal insulator support pin and method of making the same
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Also Published As

Publication number Publication date
DE1615691A1 (de) 1970-06-18
BE710170A (xx) 1968-05-30
GB1158738A (en) 1969-07-16
FR1552602A (xx) 1969-01-03
ES349844A1 (es) 1969-04-16
NL6801694A (xx) 1968-11-18

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