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US3560909A - Terminal connector - Google Patents

Terminal connector Download PDF

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Publication number
US3560909A
US3560909A US743655A US3560909DA US3560909A US 3560909 A US3560909 A US 3560909A US 743655 A US743655 A US 743655A US 3560909D A US3560909D A US 3560909DA US 3560909 A US3560909 A US 3560909A
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Prior art keywords
wire
bore
terminal connector
conductor
contact
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Expired - Lifetime
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US743655A
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James R Wyatt
Alan N Wright
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    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/50—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw
    • H01R4/5033—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw using wedge or pin penetrating into the end of a wire in axial direction of the wire
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/28—End pieces consisting of a ferrule or sleeve
    • H01R11/281—End pieces consisting of a ferrule or sleeve for connections to batteries
    • H01R11/285—Battery post and cable secured by the same locking means

Definitions

  • This invention pertains to improvements in a terminal connector for the high tension ignition distributor wires for connecting these wires to the distributor cap.
  • the patent to Dougherty 2,034,695 shows the base of the conical point 46, FIG. 4 of the Dougherty patent, as not as big as the opening defined by the annular ring 50.
  • Inspection of FIG. 4 of Dougherty shows the strands are substantially parallel even when the screw member 44 is screwed all the way in as shown. They are not bent over nor are they pinched between two radially disposed surfaces. There is no radially disposed surface extending outwardly from the base of the conical point 46 in Dougherty.
  • the holding of the wire 52 depends upon the resilience of the wire to keep it from being jerked out of position rather than upon the actual mashing radial deformation and pinching and squeezing of the wire strands between two radially disposed surfaces. It also takes a considerably longer length of wire in the Dougherty arrangement to effect the operation and fails to use a definite positive pinching action between radial surfaces so that due to the characteristics of the strands 5.2 which can vary and therefore render the Dougherty device not only defective in rigidity of holding but in reliability when used in all kinds of different wires structures.
  • the Shrider reference Pat. 2,777,117, FIG. 4 the same kind of system as found in Dougherty is used where the wires are pushed frictionally against a large at surface 17-18.
  • the wires are substantially in longitudinally disposed position though sloping slightly outwardly.
  • the point 17 of Shrider is an obtuse angle, not a 90 angle so that it is impossible, no matter how far the tapered portion 24 of Shrider is screwed in, to radially bend over and pinch the wires between the base 16 of the portion 25 and the edge 17 of the hole 261.
  • purely frictional engagement of the wire strands 15 is relied upon, with no locking of the wires over a 90 edge and pinching it between radially disposed surfaces.
  • Shriders base of the conical point 24 at 16 is much larger than the bore l11so that he could not execute the recited operation.
  • the ⁇ French Pat. 1,229,856 has the conical point 2a within the bore of 6a to receive the wires so that the only possible thing that could be relied upon is the frictional engagement of the wire strands with the straight bore 3,560,909 Patented Feb. 2, 1971 surrounding the screw threaded conical point. No possible way could the wires be bent over radially and pinched between radially disposed surfaces by a structure having a conical point with a base equal to the bore in which the wire is pushed. In the structure of this French patent, the insulation is also pinched or mashed or secured in the straight bore below the numeral 16a in FIG. 8 and is an inadequate and unsatisfactory method to hold the wire into the terminal unit.
  • One of the objects of this invention is ⁇ to provide an improved terminal connector which positively connects a conductor to a terminal in a secure and rigid manner to make a good low resistance connection under all adverse conditions of weather, vibration, and mechanical stress.
  • Still another object is to provide a plastic terminal connector that is easy to attach and remove from a terminal.
  • Still another object is to provide a fully insulative terminal connector which is fully shock-proof under all adverse weather conditions of rain and moisture and which cannot be inadvertently disconnected by rough and careless handling.
  • Still another object is to provide a connector as recited above with an axially aligned conical point and a conductor supporting bore such that the conical point engages and moves axially into the end of the conductor to spread the conductor radially beyond the diameter of the aligned bore to rigidly lock and secure the conductor to the terminal.
  • FIG. 1 is a side elevation of a terminal connector incorporating the features of this invention.
  • FIG. 2 is a plan view of the terminal connector of FIG. l.
  • FIG. 3 is an enlarged sectional view on the line 3-3 of FIG. l.
  • FIG. 4 is an exploded view of the terminal connector.
  • FIG. 5 is an enlarged diagram showing the essential critical surfaces of conductor engaging, clamping and locking device.
  • a terminal connector comprising a sheath having a reduced wire receiving end 11 and an enlarged terminal receiving end 12.
  • the reduced wire receiving end has a counterbore 13 adapted to snugly receive in a weather-tight manner the outside diameter of the insulation 14 of the high tension wire 15.
  • a small wire receiving bore 16 forms an opening in the bottom of the counterbore 13 through which projects the exposed end of the wire v15.
  • a concentrically aligned counterbore 17 is formed below the wire receiving bore 16 and in communication therewith.
  • An electro-conductive bushing insert 18 is xed in the counterbore 17 and has a conductor receiving and supporting bore 26 aligned with the bore 16 through which the end of the ⁇ wire projects into the threaded bore 19 formed in the bushing 18.
  • the upper end of the contact has an axially aligned conical point 25a having -a base equal to the diameter of the wire or conductor 15 'which axially moves into and engages the end of the wire 15 to spread it radially and bend it over beyond the diameter of the aligned bore 26 as the contact stud is screwed into bushing 18 to positively rigidly lock the wire .15 in contact with the contact stud 20 and to thereby secure the conductor as a whole to the sheath against dislodgement and with low resistance contact to thereby clamp with positive holding force the ared strands of the wire between the sharp 90 lower edge of the bore 26 of the bushing 18 and the conical face 25a of the contact stud 20.
  • the enlarged terminal portion 12 of the sheath 10 has a counterbore 27 adapted to snugly lit down over the outside diameter surface 28 of the socket portion 22 to form a weather-tight seal between sheath 10 and the distributor cap 24.
  • the lines A-B show the bore diameter 26 which intersect the base line C of the conical point 25a at the common points of intersection D-D 'with the conical face 25a of the contact stud represented by the lines E and E.
  • the base diameter DD of the conical face 25a equals the diameter A-B of the aligned bore 26.
  • a high tension wire terminal connector comprising:
  • a terminal connector as in claim 1 wherein a radially disposed surface lying in a plane defined by the base of the conical point is formed on the end of the contact stud to further deflect and secure the ared wire end against the bottom surface of the counterbore in the bushing.

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  • Connector Housings Or Holding Contact Members (AREA)

Abstract

A TERMINAL CONNECTOR HAVING A CONTACT WHICH IS POSITIVELY ENGAGED WITH THE WIRE CONDUCTOR IN A MANNER TO EFFECT LOW RESISTANCE ELECTRICAL CONTACT WHILE PREVENTING THE DISCONNECTION OF THE CONDUCTOR FROM THE TERMINAL CONNECTOR UNDER SERVERE OPERATING CONDITIONS.

Description

Feb. 2, 1971 J. R. WYATT ET AL TERMINAL CONNECTOR Filed July 10, 1968 f TTRNEY United States Patent O Filed .lilly 10, 1968, Ser. No. 743,655 Int. Cl. H011' 11/20 ILS. Cl. 339-100 3 Claims ABSTRACT OF THE DISCLOSURE A terminal connector having a Contact which is positively engaged with the wire conductor in a manner to effect low resistance electrical contact while preventing the disconnection of the conductor from the terminal connector under severe operating conditions.
BACKGROUND OF THE INVENTION This invention pertains to improvements in a terminal connector for the high tension ignition distributor wires for connecting these wires to the distributor cap.
The following prior art references are representative: 2,777,117, January 1957, Shrider; 2,034,695, March 1936, Dougherty; and 1,229,856, October 1960, Geminet (France).
The patent to Dougherty 2,034,695 shows the base of the conical point 46, FIG. 4 of the Dougherty patent, as not as big as the opening defined by the annular ring 50. As a result, it would be impossible to screw the pointed end 46 of the threaded member 44 toward the annular ring `50 so as to pinch and turn over the ends of the strands of the wire 52 in a radial direction. Inspection of FIG. 4 of Dougherty shows the strands are substantially parallel even when the screw member 44 is screwed all the way in as shown. They are not bent over nor are they pinched between two radially disposed surfaces. There is no radially disposed surface extending outwardly from the base of the conical point 46 in Dougherty. The holding of the wire 52 depends upon the resilience of the wire to keep it from being jerked out of position rather than upon the actual mashing radial deformation and pinching and squeezing of the wire strands between two radially disposed surfaces. It also takes a considerably longer length of wire in the Dougherty arrangement to effect the operation and fails to use a definite positive pinching action between radial surfaces so that due to the characteristics of the strands 5.2 which can vary and therefore render the Dougherty device not only defective in rigidity of holding but in reliability when used in all kinds of different wires structures.
The Shrider reference Pat. 2,777,117, FIG. 4, the same kind of system as found in Dougherty is used where the wires are pushed frictionally against a large at surface 17-18. The wires are substantially in longitudinally disposed position though sloping slightly outwardly. Furthermore, the point 17 of Shrider is an obtuse angle, not a 90 angle so that it is impossible, no matter how far the tapered portion 24 of Shrider is screwed in, to radially bend over and pinch the wires between the base 16 of the portion 25 and the edge 17 of the hole 261. Thus, purely frictional engagement of the wire strands 15 is relied upon, with no locking of the wires over a 90 edge and pinching it between radially disposed surfaces. Shriders base of the conical point 24 at 16 is much larger than the bore l11so that he could not execute the recited operation.
The `French Pat. 1,229,856 has the conical point 2a within the bore of 6a to receive the wires so that the only possible thing that could be relied upon is the frictional engagement of the wire strands with the straight bore 3,560,909 Patented Feb. 2, 1971 surrounding the screw threaded conical point. No possible way could the wires be bent over radially and pinched between radially disposed surfaces by a structure having a conical point with a base equal to the bore in which the wire is pushed. In the structure of this French patent, the insulation is also pinched or mashed or secured in the straight bore below the numeral 16a in FIG. 8 and is an inadequate and unsatisfactory method to hold the wire into the terminal unit.
SUMMARY OF THE INVENTION One of the objects of this invention is` to provide an improved terminal connector which positively connects a conductor to a terminal in a secure and rigid manner to make a good low resistance connection under all adverse conditions of weather, vibration, and mechanical stress.
Still another object is to provide a plastic terminal connector that is easy to attach and remove from a terminal.
Still another object is to provide a fully insulative terminal connector which is fully shock-proof under all adverse weather conditions of rain and moisture and which cannot be inadvertently disconnected by rough and careless handling.
It is also a further object to provide a terminal connector of high physical strength and durability.
Still another object is to provide a connector as recited above with an axially aligned conical point and a conductor supporting bore such that the conical point engages and moves axially into the end of the conductor to spread the conductor radially beyond the diameter of the aligned bore to rigidly lock and secure the conductor to the terminal.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side elevation of a terminal connector incorporating the features of this invention.
FIG. 2 is a plan view of the terminal connector of FIG. l.
FIG. 3 is an enlarged sectional view on the line 3-3 of FIG. l.
FIG. 4 is an exploded view of the terminal connector.
FIG. 5 is an enlarged diagram showing the essential critical surfaces of conductor engaging, clamping and locking device.
DESCRIPTION OF THE PREFERRED EMBODIMENT As an example of one embodiment of this invention there is shown a terminal connector comprising a sheath having a reduced wire receiving end 11 and an enlarged terminal receiving end 12. The reduced wire receiving end has a counterbore 13 adapted to snugly receive in a weather-tight manner the outside diameter of the insulation 14 of the high tension wire 15. A small wire receiving bore 16 forms an opening in the bottom of the counterbore 13 through which projects the exposed end of the wire v15.
A concentrically aligned counterbore 17 is formed below the wire receiving bore 16 and in communication therewith. An electro-conductive bushing insert 18 is xed in the counterbore 17 and has a conductor receiving and supporting bore 26 aligned with the bore 16 through which the end of the `wire projects into the threaded bore 19 formed in the bushing 18.
A contact stud 20 has a diameter portion 21 adapted to tit snugly into the socket portion 22 and the contact terminal 23 of an ignition distributor cap 24 or the like. The upper end of the contact stud 20 has a threaded reduced portion 25 adapted to threadedly tit into the threaded bore 19 of the bushing :insert 18. The upper end of the contact has an axially aligned conical point 25a having -a base equal to the diameter of the wire or conductor 15 'which axially moves into and engages the end of the wire 15 to spread it radially and bend it over beyond the diameter of the aligned bore 26 as the contact stud is screwed into bushing 18 to positively rigidly lock the wire .15 in contact with the contact stud 20 and to thereby secure the conductor as a whole to the sheath against dislodgement and with low resistance contact to thereby clamp with positive holding force the ared strands of the wire between the sharp 90 lower edge of the bore 26 of the bushing 18 and the conical face 25a of the contact stud 20.
The enlarged terminal portion 12 of the sheath 10 has a counterbore 27 adapted to snugly lit down over the outside diameter surface 28 of the socket portion 22 to form a weather-tight seal between sheath 10 and the distributor cap 24.
Referring particularly to FIG. 5, the lines A-B show the bore diameter 26 which intersect the base line C of the conical point 25a at the common points of intersection D-D 'with the conical face 25a of the contact stud represented by the lines E and E. The base diameter DD of the conical face 25a equals the diameter A-B of the aligned bore 26.
It can be clearly seen that the ends F of the wire strands 15 are bent over radially around the 90 edge G of the aligned bore 26 and are mashed between the radially disposed surface H adjacent the inner edge G of the bore 26 and the radially extending surface l defined by line C extending outwardly from the base of the a, such critical structure being essential to the proper positive locking of the wire 15 in the connector.
While the apparatus herein disclosed and described constitutes a preferred form of the invention, it is also to be understood that the apparatus is capable of mechanical alteration Without departing from the spirit of the invention and that such mechanical arrangement and cornmercial adaptation as fall within the scope of the appendent claims are intended to be included herein.
We claim:
1. A high tension wire terminal connector comprising:
(A) a sheath having a reduced wire receiving end and an enlarged terminal receiving end,
(B) a counterbore surface within the reduced wire receiving end adapted to snugly receive the outside diameter of the insulation of the high tension wire,
(C) a small wire receiving bore surface forming an opening in the bottom of the counterbore through which projects the exposed end of the wire,
(D) a concentrically aligned counterbore Surface formed below the wire receiving bore and in cornmunication therewith,
(E) a bushing fixed in the concentrically aligned counterbore having a wire receiving and supporting bore aligned with the Wire receiving bore and an enlarged threaded bore axially aligned with the wire receiving bore, the threaded bore having a radially disposed inner surface intersecting the wire receiving bore in a sharp edge,
(F) a contact stud having a threaded portion adapted to threadedly t into the threaded bore in the bushing,
(G) and an' axially aligned conical point on the end of the contact stud adjacent the threaded portion having a base diameter equal to the diameter to the conductor and the wire receiving bore so that rotation of the contact stud in the threaded bore in the bushing moves the conical point axially into the end of the wire to spread it radially and bend the wire over and beyond the sharp 90 edge of the wire receiving bore to positively lock the wire in contact with the contact stud to thereby secure the wire as a whole to the sheath against dislodgement.
2. A terminal connector as in claim 1 wherein low resistance positive electrical contact is provided by clamping 'with positive holding force the radially flared end of the wire between the sharp 90 edge of the wire receiving bore of the bushing and the conical face of the conical point.
3. A terminal connector as in claim 1 wherein a radially disposed surface lying in a plane defined by the base of the conical point is formed on the end of the contact stud to further deflect and secure the ared wire end against the bottom surface of the counterbore in the bushing.
References Cited UNITED STATES PATENTS 2,034,695 3/1936 Dougherty 339--100 2,156,272 5/1939 Bell 174-941 FOREIGN PATENTS 26,368 6/1923 France 339-100 15,836 8/1912 Great Britain 339-10 212,983 3/1924 Great Britain 339-100 MARVIN A. CHAMPION, Primary Examiner J. H. MCGLYNN, Assistant Examiner
US743655A 1968-07-10 1968-07-10 Terminal connector Expired - Lifetime US3560909A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4163597A (en) * 1978-08-14 1979-08-07 Stitt Spark Plug Company Electrical connector for a spark plug
US4274695A (en) * 1978-02-03 1981-06-23 Hitachi, Ltd. Device for electrically connecting spark plug to high-voltage cable
US4288311A (en) * 1980-01-18 1981-09-08 Albert Singleton Contactor and dangler assembly for plating barrel
US4392703A (en) * 1978-03-27 1983-07-12 The Bendix Corporation Electrical conductor having an integral electrical contact
US4417395A (en) * 1978-03-27 1983-11-29 The Bendix Corporation Method of making an electrical conductor having an integral electrical contact
EP0674359A1 (en) * 1994-03-23 1995-09-27 Jps Connectic Female electrical contact element for an electrical connector and an electrical connector having at least one such element
US5487679A (en) * 1994-05-23 1996-01-30 Quaintance; Laythol W. Electric connector
US20030207610A1 (en) * 2002-05-04 2003-11-06 Harting Kgaa Clamping device with a connection for cable strands
US20060292936A1 (en) * 2003-08-26 2006-12-28 Jean Fankhauser Cable connecting system

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4274695A (en) * 1978-02-03 1981-06-23 Hitachi, Ltd. Device for electrically connecting spark plug to high-voltage cable
US4392703A (en) * 1978-03-27 1983-07-12 The Bendix Corporation Electrical conductor having an integral electrical contact
US4417395A (en) * 1978-03-27 1983-11-29 The Bendix Corporation Method of making an electrical conductor having an integral electrical contact
US4163597A (en) * 1978-08-14 1979-08-07 Stitt Spark Plug Company Electrical connector for a spark plug
US4288311A (en) * 1980-01-18 1981-09-08 Albert Singleton Contactor and dangler assembly for plating barrel
EP0674359A1 (en) * 1994-03-23 1995-09-27 Jps Connectic Female electrical contact element for an electrical connector and an electrical connector having at least one such element
FR2717954A1 (en) * 1994-03-23 1995-09-29 Jps Connectic Female contact socket element for electrical connector and electrical connector equipped with at least one such element.
US5487679A (en) * 1994-05-23 1996-01-30 Quaintance; Laythol W. Electric connector
US20030207610A1 (en) * 2002-05-04 2003-11-06 Harting Kgaa Clamping device with a connection for cable strands
US6773295B2 (en) * 2002-05-04 2004-08-10 Harting Electric Gmbh & Co. Kg Clamping device with a connection for cable strands
US20060292936A1 (en) * 2003-08-26 2006-12-28 Jean Fankhauser Cable connecting system
US7311565B2 (en) 2003-08-26 2007-12-25 Multi-Holding Ag Cable connecting system

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