EP0041903A1 - Contact électrique à élément tubulaire intérieur et méthode de fabrication de celui-ci - Google Patents

Contact électrique à élément tubulaire intérieur et méthode de fabrication de celui-ci Download PDF

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Publication number
EP0041903A1
EP0041903A1 EP81400926A EP81400926A EP0041903A1 EP 0041903 A1 EP0041903 A1 EP 0041903A1 EP 81400926 A EP81400926 A EP 81400926A EP 81400926 A EP81400926 A EP 81400926A EP 0041903 A1 EP0041903 A1 EP 0041903A1
Authority
EP
European Patent Office
Prior art keywords
holes
sleeve member
contact
sleeve
electrical contact
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.)
Withdrawn
Application number
EP81400926A
Other languages
German (de)
English (en)
Inventor
Donald Leo Pfendler
Edward Joseph Bright
Herbert Kurt Uhlig
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.)
Bendix Corp
Original Assignee
Bendix Corp
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 Bendix Corp filed Critical Bendix Corp
Publication of EP0041903A1 publication Critical patent/EP0041903A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01R13/10—Sockets for co-operation with pins or blades
    • H01R13/11—Resilient sockets
    • H01R13/111—Resilient sockets co-operating with pins 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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
    • H01R13/187—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with spring member in the socket
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • 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

Definitions

  • This invention relates to electrical connectors of the type having an outer shell or housing ; a plurality of electrical contacts, each of which are electrically a dielectric insert or insert assembly mounted to the housing for either fixedly or removably mounting the electrical contacts in the shell electrically isolated from other conductors.
  • This invention is more particularly related to an improved electrical contact assembly and a superior method of making the contact.
  • the present invention is related to and an improvement upon the invention disclosed in US Patent 4 120 556, issued October 17, 1978 and entitled “Electrical Contact Assembly”.
  • This patent is hereby specifically incorporated herein by reference and is herein sometimes referred to as the "Three-Piece Contact Patent”.
  • the present invention is also related to US Patent 4 072 394 to C.R. Waldron et al, for "Electrical Contact Assembly”. This patent is also incorporated herein by reference, sometimes referred to as the "Alternate Three-Piece Contact Patent”.
  • the present invention is also similar to US SN 158 654 filed June 11, 1980 in the names of D..L. Pfendler and E.J. Bright, also hereby specifically incorporated herein by reference and sometimes referred to as the "Pfendler/Bright Patent Application”.
  • a variety of electrical contacts have been suggested in the prior art.
  • a variety of methods of making such contact also have been suggested in the prior art.
  • the contact will be inexpensive and simple to manufacture and assemble, having superior electrical properties, and have good mechanical characteristics (resistance to conductor "pull out” or undesirable contact disassembly).
  • the Three-Piece Contact Patent describes an electrical contact (and method of making it) somewhat similar to the present invention.
  • the electrical contact described therein presents possible manufacturing and assembly difficulties which could lead to quality and reliability problems in electrical or mechanical properties.
  • the contacts in that patent are shown to have four elongated slots.
  • the four slot sleeve (shown therein) is crimped in place by a crimping mechanism having four radially spaced crimper members.
  • the elongated slots could coact with the equal number of crimpers to provide an unreliable mechanical and electrical connection.
  • the Pfendler/Bright patent addresses this problem by providing an arrangement of slots unequal to the number of crimpers and provides internal grooves in the sleeve. While such a design works well, the removal of so much material (to form slots) may be undesirable in some instances by reducing mechanical and electrical characteristics of the contact.
  • electrical contacts are machined from cylindrical metal stock. In these machined contacts, very close manufacturing tolerances (0,05 mm or less) are frequently desired to avoid oversized contact parts. An oversized contact may not be insertable into connector apertures designed to receive the contacts. Further, an insufficient clearance, caused by either an undersized or oversized part, could prevent proper electric or mechanical operation of the contact.
  • Machined contacts are also generally relatively expensive to manufacture when machine and operator costs are considered. Further, the weight of a machined contact is typically greater than the weight of a stamped and formed contact as described in present invention. While individual contact weight is generally small, an aircraft requires a very large number of contacts and every extra gram of aircraft equipement (e.g.,in the contacts) displaces a gram of potential load, since the maximum weight for equipment and load is specified for the aircraft.
  • Machined contacts are also disadvantageous in that the machines producing them are time-consuming and difficult to set up and inherently produce a parts output which have a relative wide dimensional range.
  • This dimensional range requires a costly post-manufacture inspection, at which a significantly number of machined parts may be rejected or discarded as not meeting specifications.
  • the reject problem significantly raises the costs of good parts.
  • the invention proposes an electrical contact characterized in that it comprises a tubular sleeve member having a front contact section, a rear wire receiving section and a medial section, said rear wire receiving section including a plurality of axially spaced grooves extending around the internal periphery thereof and having a plurality of holes extending therethrough, said holes being arranged in an axial and radial pattern in the rear wire receiving section and a second sleeve member telescopically mounted over at least one portion of the sleeve member and secured thereon.
  • the invention also proposes a method of leaking an electrical contact assembly, characterized in that it comprises the steps of :
  • the present contact assembly includes a sleeve stamped to have an arrangement of holes in a conductor-receiving rear portion and advantageously includes a plurality of internal grooved indentations extending circumferentially around the conductor-receiving portion forwardly of some, but preferably not all of the holes.
  • the holes are arranged in sets of a pair of axially-spaced closely adjacent holes, with a third hole spaced axially at a significantly greater distance. Sets of holes are repeated at several (e.g. four) radial locations.
  • the holes are small and round and of uniform size, allowing the sleeve to be easily crimped while retaining substantial sleeve portions for mechanical (conductor retention) and electrical (current and signal transmission) purposes.
  • the electrical contact of the present invention has the advantage that it is lower weight and higher quality than that of prior art machined contacts.
  • the present invention also has the advantage that it has better electrical and mechanical characteristics that the contact described in the Three-Piece Contact Patent or the Alternate Three-Piece Contact patents referred above.
  • the preferred embodiment of the present invention is a three-piece electrical contact assembly including a sleeve that is stamped and formed from a piece of sheet metal and is characterized by a tubular inner sleeve which has an unwelded seam and twelve holes arranged in a pattern of four holes symmetrically radially at each of three axial location in the rear of the sleeve when formed into a tubular shape.
  • a conductor is secured within the sleeve by being crimped in place with crimps engaging each of the sets of holes.
  • Figure 1 is a top view of a one-piece contact sleeve member 10 showing elements of the present invention.
  • the sleeve member 10 is shown as it is initially formed, a flat piece of sheet metal or other electrically conducting material, stamped in substantially the shape shown.
  • the sleeve member 10 includes a forward contact section 12, a medial section 14, and a rear conductor-receiving section 16.
  • the forward contact section 12 includes two (or, alternatively a plurality of) projections 13 which taper to narrower forward ends. The projections become spring fingers for receiving a male or pin-type electrical contact in both mechanical contact and an electrical circuit relationship after the sleeve member is formed into its three-dimensionsal cylindrical shape.
  • the medial section 14 spatially connects and electrically joins the forward contact section 12 and the rear conductor-receiving section 16.
  • the rear conductor-receiving section 16 includes a plurality of grooved depressions or indentations 18 extending transverse to the length of the sleeve member 10 and transverse to the axis of the cylindrically- shaped sleeve member 10 (when formed). These grooves 18 are formed on the inside side of the sleeve member 10 when it is formed into its three-dimensional cylindrical shape.
  • the rear section 16 also includes a plurality of holes generally circular and of small diameter with respect to the width of the sleeve member 10.
  • a plurality of holes generally circular and of small diameter with respect to the width of the sleeve member 10.
  • first hole halves 19d cooperates with second hole halves 19e to form a single set of holes.
  • These radially spaced holes and-hole portions are separated by a uniform lateral spacing to provide a uniform angular (radial) separation of the hole sets when the contact sleeve portion is formed into its cylindrical shape.
  • Figure 2 shows the contact sleeve member 10 formed into a-cylindrical shape by forming the sleeve 10.
  • the sleeve member 10 is symmetrical about an axis which is parallel to the length of the sleeve portion and the slots.
  • the forward contact section 12 has the spring fingers 13 converging to its forward end for receiving the pin-type contact therein.
  • the grooved indentations 18 are shown in the cut-away portion extending circumferentially around the inside portion of the sleeve member 10 of Figure 2.
  • the grooves 18 are preferably located forwardly of at least the rear holes (19a, 19b) but within the rear contact receiving section 16.
  • a rear end portion 21 of the contact body is flared radially outwardly for more ease in inserting an electrical conductor therein.
  • the hole halves 19d, 19e meet at a seam 22 to form a single set of holes, generally similar in shape to the other hole sets 19.
  • the contact sleeve portion 10 is crimped after a conductor is inserted into the rear end thereof to retain the conductor therein.
  • Existing crimping apparatus are well known and generally have a plurality of radially spaced crimping elements, including four bi-lobed elements spaced 90 degrees apart in the preferred embodiment.
  • Applicants preferred structure is specifically disclosed to have holes axially arranged to fall under or near each of the lobes, as, for example, holes 19c falling near one lobe with the other lobe falling near holes 19a and/or holes 19b.
  • the present invention therefore, provides arrangement in which the crimps of the sleeve made by the crimping apparatus will deform the sleeve into contact with in the region of the holes 19c and either holes 19a or 19b (or both) as well as the grooves 18 are deformed into the conductor slots.
  • applicants insure that a significant solid portion of the sleeve in the region of the holes will be crimped into the conductor to, thereby retain the conductor within the contact sleeve.
  • the contact sleeve is positioned within the crimping members to insure that a portion of the crimping members extends into the region occupied by the grooved portions 18 to further retain the conductor within the sleeve member.

Landscapes

  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
EP81400926A 1980-06-11 1981-06-11 Contact électrique à élément tubulaire intérieur et méthode de fabrication de celui-ci Withdrawn EP0041903A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15865580A 1980-06-11 1980-06-11
US158655 2002-05-30

Publications (1)

Publication Number Publication Date
EP0041903A1 true EP0041903A1 (fr) 1981-12-16

Family

ID=22569103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400926A Withdrawn EP0041903A1 (fr) 1980-06-11 1981-06-11 Contact électrique à élément tubulaire intérieur et méthode de fabrication de celui-ci

Country Status (3)

Country Link
EP (1) EP0041903A1 (fr)
JP (1) JPS5727579A (fr)
CA (1) CA1149898A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5955506A (en) * 1996-04-03 1999-09-21 Centaur Pharmaceuticals, Inc. Benzamides for neurodegenerative disorder treatment

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010010000A (ja) * 2008-06-27 2010-01-14 Autonetworks Technologies Ltd 端子金具及び端子付き電線
JP5412142B2 (ja) * 2009-02-27 2014-02-12 矢崎総業株式会社 圧着端子

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2452932A (en) * 1944-04-10 1948-11-02 Aircraft Marine Prod Inc Electrical connector
US2685076A (en) * 1951-05-05 1954-07-27 Aircraft Marine Prod Inc Electrical connector
GB1164100A (en) * 1967-09-13 1969-09-10 Amp Inc Terminal for Connection to Aluminium Wire
FR2343344A1 (fr) * 1976-03-01 1977-09-30 Bendix Corp Organe de contact electrique, notamment pour connecteurs electriques
EP0025366A1 (fr) * 1979-08-31 1981-03-18 The Bendix Corporation Connecteur électrique séparable du type contenant des premiers et seconds membres connecteurs avec des contacts améliorés pour l'un des membres connecteurs

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2452932A (en) * 1944-04-10 1948-11-02 Aircraft Marine Prod Inc Electrical connector
US2685076A (en) * 1951-05-05 1954-07-27 Aircraft Marine Prod Inc Electrical connector
GB1164100A (en) * 1967-09-13 1969-09-10 Amp Inc Terminal for Connection to Aluminium Wire
FR2343344A1 (fr) * 1976-03-01 1977-09-30 Bendix Corp Organe de contact electrique, notamment pour connecteurs electriques
US4120556A (en) * 1976-03-01 1978-10-17 The Bendix Corporation Electrical contact assembly
EP0025366A1 (fr) * 1979-08-31 1981-03-18 The Bendix Corporation Connecteur électrique séparable du type contenant des premiers et seconds membres connecteurs avec des contacts améliorés pour l'un des membres connecteurs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Electrical World, Vol. 168, No. 24, December 11, 1967, New York (US) "Terminals/Splices...", pages 120 and 122 *page 120, right-hand column, figures and last paragraph; page 122, right-hand column, paragraph 1* *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5955506A (en) * 1996-04-03 1999-09-21 Centaur Pharmaceuticals, Inc. Benzamides for neurodegenerative disorder treatment

Also Published As

Publication number Publication date
JPS5727579A (en) 1982-02-13
CA1149898A (fr) 1983-07-12

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19810619

AK Designated contracting states

Designated state(s): DE FR GB IT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19820507

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BRIGHT, EDWARD JOSEPH

Inventor name: PFENDLER, DONALD LEO

Inventor name: UHLIG, HERBERT KURT