US2623086A - Electrical connection for strip conductors - Google Patents

Electrical connection for strip conductors Download PDF

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Publication number
US2623086A
US2623086A US48483A US4848348A US2623086A US 2623086 A US2623086 A US 2623086A US 48483 A US48483 A US 48483A US 4848348 A US4848348 A US 4848348A US 2623086 A US2623086 A US 2623086A
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Prior art keywords
conductors
connector
strip
arcuate
aperture
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Expired - Lifetime
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US48483A
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Frederick S Sampson
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United Carr Fastener Corp
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United Carr Fastener Corp
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Priority to US48483A priority Critical patent/US2623086A/en
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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
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
    • H01R12/716—Coupling device provided on the PCB
    • H01R12/718—Contact members provided on the PCB without an insulating housing
    • 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
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/42—Securing in a demountable manner
    • H01R13/428—Securing in a demountable manner by resilient locking means on the contact members; by locking means on resilient contact members
    • H01R13/432—Securing in a demountable manner by resilient locking means on the contact members; by locking means on resilient contact members by stamped-out resilient tongue snapping behind shoulder in base or case
    • 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.
    • Y10T24/42—Independent, headed, aperture pass-through fastener
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/75—Joints and connections having a joining piece extending through aligned openings in plural members

Definitions

  • the present invention relates to electrical in-' stallations of the type in which a plurality of bare strip conductors are secured to a supporting member or panel, and aims generally to improve and simplify the construction of the installation as well as the connectors therefor.
  • One of the primary objects of the invention is the provision of improved means for quickly and effectively connecting a plurality of strip conductors together or to a supporting member or panel.
  • a further object of the invention is the provision of an improved construction of installation embodying a plurality of ribbon-like conductors and a connector therefor insuring a good electrical but solderless contact between the conductors.
  • a further object of the invention is the provision of an improved solderless connector for strip conductors.
  • Fig. 1 is a plan view of a pair of conductors connected together by means of a connector embodying the invention, the assembly being mounted on an insulating support;
  • Fig. 2 is a side elevation of the assembly of conductors and connectors shown in Fig. 1, the support being shown in section and the View generally as being taken on the line 2-2 of Fig. 1;
  • Fig. 3 is a plan view of two conductor ends shown disassembled and suitably apertured to receive a connector of the present invention
  • Fig. 4 is a detail plan view of the connector
  • Fig. 5 is a side elevation thereof
  • Fig. 6 is an end elevation thereof
  • Fig. 7 is an enlarged vertical sectional view of the assembly as taken on the line 1-1 of Fig. 1;
  • Fig. 8 is an enlarged horizontal sectional view taken on-the line 8--8 of Fig. 7.
  • the invention provides an improved connector or fastener device for securing together, in electrical contact, two or more apertured ribbon-like conductors, and in the preferred form of the invention the fastener serves to secure the connected conductors to an apertured supporting panel, for example a sheet of insulating material.
  • FIG. 173324 illustrated in the drawings includes an installation comprising a supporting body or panel I, which may be a sheet of insulating material, provided with apertures 2, and upon which a plurality of ribbon-like strip conductors H], to be electrically connected, are laid.
  • a supporting body or panel I which may be a sheet of insulating material, provided with apertures 2, and upon which a plurality of ribbon-like strip conductors H], to be electrically connected, are laid.
  • Such ribbonlike strip conductors H) are conveniently formed of spring brass strips approximately one quarter 1%) inch wide and approximately 0.010 inch in thickness.
  • a plurality of such strip conductors are conveniently secured to or sandwiched between insulating panels 1 and 3, and provide a simple inexpensive construction which will not be subject to wear or short-circuiting as in the case of other systems employing individually insulated conductors.
  • the strip conductors 10 to be electrically connected together are designed to be overlapped and each is provided with a substantially circular aperture ll designed to coincide substantially with the aperture 2 in the support I.
  • the apertures ll of the strip conductors ID are of slightly elongated circular form, and advantageously have arcuate edges of different radii circumscribed about spaced centers, as is illustrated in Fig. 3.
  • the arcuate edges of each radius are preferably separated by laterally projecting elements l2 as shown in Fig. 3.
  • the arcuate edge of the greater radius A is adjacent a terminal end of the strip conductor l0 and the arc of lesser radius B is opposite.
  • the apertures of the overlapping conductors are reversed so that an aperture area of larger radius of one conductor will overlie an aperture area of lesser radius of another conductor.
  • the apertured strip conductors may be electrically connected together and advantageously to a supporting panel or member I by means of a connector or fastening device such as is illustrated in the drawings, particularly in Figs. 4 to 7 thereof.
  • the connector i5 is advantageously formed of thin resilient metal, for example spring sheet brass of 0.010 inch thickness, and may be of general U-shaped form providing a bottom bight portion l6, resilient legs [1 and an outwardly flanged head [8, the latter preferably being formed on the terminal ends of the leg portions H.
  • the leg portions H are preferably formed with lateral wings l9 so as to present arcuate surfaces of substantial extent and preferably the radius of curvature of said arcuate wings corresponds to the lesser radius of curvature B of the aperture I l.
  • the ends of the wings normally may be distorted radially outward Fig. 4 so as to be forced inwardly as the connector is forced through the aligned apertures ll Fig.
  • the connector is preferably provided with support-engaging and locking means for locking the connector and connected conductors in assembled relation with the support I.
  • the support-locking means is in the form of one or more resilient tongues connected to the bottom bight portion I6 extending outward:- ly therefrom, between the opposed legs H a distance substantially less than the length of the legs 17, equal substantially to the combined thickness of the support i and the overlapping conductors Hi.
  • the tongues 20 will expand radially outwardly and snap under the face of the support I opposite the face on which the conductors are. mounted.
  • the length of thetongues 20 will be so proportioned to the length of the legs I! and the combined thickness of the support I and conductors ii], that when the connector is locked in the support I, the flanged head will overlie and engage the outermost conductor to hold the parts in assembled relation as well as in good electrical contact.
  • the invention provides a simple, economical yet emcient solderless connector for strip conductors. It also provides a simple and convenient means of securing said connected conductors to an apertured supporting panel, permitting ready assembly of the conductors on the panels to complete the desired circuit prior to superimposing the second insulating panel 3.
  • the elongated circular form of the conductor aperture and the resilience of the leg portions ll of the connector combine to maintain a good electrical contact between the aperture walls of the conductors and the arcuate contact wings l9 even though some shifting of one conductor relative to another is required.
  • a pair of striplike conductors each provided with an elongated circular aperture of varying radii adapted tov be assembled in overlapping relation with their apertures in substantial alignment, and an elongated sheet metal connector fitted in said apertures and having spaced resilient arcuate sections adapted for tensioned electrical line contact engagement with an arcuate portion of lesser radii of the aperture wall of each conductor,
  • a pair. of relatively fiat ribbon-like strip conductors adapted to be connected in overlapping relation, each of said strips provided with an elongated circular opening of varying radii, a substantially U -shaped connector fitted in said apertures, the legs of said U-shaped connector being of arcuate cross section for tensioned electrical line contact engagement with an arcuate portion of lesser radii of the aperture wall of each conductor, said portion of one conductor being disposed opposite said portion of the other.
  • a pair of ribbon-like sheet metal conductors arranged with portions thereof. in overlapping relation, the coinciding, portions of said conductors being provided with connector-receiving apertures each having arcuate wall portions of varying radii, and a substantially U-shaped connector inserted through said coinciding apertures and having opposed arcuate resilient leg portions each adapted to make substantially an electrical. line contact with the portion of the arcuate aperture wall of lesser radii of one of said conductors.
  • a pair of relatively flat ribbon-like conductors adapted to be connected in overlapping relation, each of said strips provided with an elongated circular opening having side edges of two different radii, positioning elements extending into saidopenings adjacent the intersection. of the side edges of different radii, a substantially U-shaped connector fitted in said openings, the legs of said U-shaped connector being of arcuate cross-section for tensioned electrical line contact engagement each with the strip aperture edge of lesser radii of one of the conductors and secured in tensioned engagement each with the positioning elements definingv the corresponding strip aperture edge of lesser radii.
  • An electrical connector for apertured strip conductors comprising a substantially U-shaped member having a bight portion, opposed leg portions, laterally extending. wings on said leg portions, said wings and said leg portions having arcuate cross-section in planes normal thereto. said wings and said leg portions being radially resilient and providing radiallyresilient conductor aperture-edge-contactingportions, opposed outwardly extending oppositely directed lateral flanges on the free ends of said leg portions, and laterally resilient support-engaging means extending angularly outwardly toward the plane of said flanges from the opposite side edges of said bight portion.

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  • Multi-Conductor Connections (AREA)

Description

Dec. 23, 1952 F, s. SAMPSON ELECTRICAL CONNECTION FOR STRIP SQNDUC'I'ORS Filed Sept. 9, $1948 FIGJ.
FIG.3.
B Eim H NVENTOR.
FRE
0 R %SAMPsoN, 5A? 66A ATTORNEY- Patented Dec. 23, 1952 ELECTRICAL CONNECTION FOR STRIP CONDUCTOR'S Frederick S. Sampson, Saugus, Mass, assignor to United-Carr Fastener Corporation, Cambridge, Mass., a corporation of Massachusetts Application September 9, 1948, Serial No. 48,483
The present invention relates to electrical in-' stallations of the type in which a plurality of bare strip conductors are secured to a supporting member or panel, and aims generally to improve and simplify the construction of the installation as well as the connectors therefor.
One of the primary objects of the invention is the provision of improved means for quickly and effectively connecting a plurality of strip conductors together or to a supporting member or panel.
A further object of the invention is the provision of an improved construction of installation embodying a plurality of ribbon-like conductors and a connector therefor insuring a good electrical but solderless contact between the conductors.
A further object of the invention is the provision of an improved solderless connector for strip conductors.
The above and other objects of the invention will be apparent to persons skilled in the art to which the invention relates from a consideration of the accompanying drawings and annexed specification illustrating and describing a preferred form of the invention.
In the drawings:
Fig. 1 is a plan view of a pair of conductors connected together by means of a connector embodying the invention, the assembly being mounted on an insulating support;
Fig. 2 is a side elevation of the assembly of conductors and connectors shown in Fig. 1, the support being shown in section and the View generally as being taken on the line 2-2 of Fig. 1;
Fig. 3 is a plan view of two conductor ends shown disassembled and suitably apertured to receive a connector of the present invention;
Fig. 4 is a detail plan view of the connector;
Fig. 5 is a side elevation thereof;
Fig. 6 is an end elevation thereof;
Fig. 7 is an enlarged vertical sectional view of the assembly as taken on the line 1-1 of Fig. 1; and
Fig. 8 is an enlarged horizontal sectional view taken on-the line 8--8 of Fig. 7.
' The invention provides an improved connector or fastener device for securing together, in electrical contact, two or more apertured ribbon-like conductors, and in the preferred form of the invention the fastener serves to secure the connected conductors to an apertured supporting panel, for example a sheet of insulating material.
The particular embodiment of the invention 5 Claims. (Cl. 173324) illustrated in the drawings includes an installation comprising a supporting body or panel I, which may be a sheet of insulating material, provided with apertures 2, and upon which a plurality of ribbon-like strip conductors H], to be electrically connected, are laid. Such ribbonlike strip conductors H) are conveniently formed of spring brass strips approximately one quarter 1%) inch wide and approximately 0.010 inch in thickness. A plurality of such strip conductors are conveniently secured to or sandwiched between insulating panels 1 and 3, and provide a simple inexpensive construction which will not be subject to wear or short-circuiting as in the case of other systems employing individually insulated conductors.
The strip conductors 10 to be electrically connected together are designed to be overlapped and each is provided with a substantially circular aperture ll designed to coincide substantially with the aperture 2 in the support I.
Preferably the apertures ll of the strip conductors ID are of slightly elongated circular form, and advantageously have arcuate edges of different radii circumscribed about spaced centers, as is illustrated in Fig. 3. The arcuate edges of each radius are preferably separated by laterally projecting elements l2 as shown in Fig. 3. Preferably, the arcuate edge of the greater radius A is adjacent a terminal end of the strip conductor l0 and the arc of lesser radius B is opposite. Whatever the location of the apertures in the strip conductors, the apertures of the overlapping conductors are reversed so that an aperture area of larger radius of one conductor will overlie an aperture area of lesser radius of another conductor.
The apertured strip conductors may be electrically connected together and advantageously to a supporting panel or member I by means of a connector or fastening device such as is illustrated in the drawings, particularly in Figs. 4 to 7 thereof.
According to the invention, the connector i5 is advantageously formed of thin resilient metal, for example spring sheet brass of 0.010 inch thickness, and may be of general U-shaped form providing a bottom bight portion l6, resilient legs [1 and an outwardly flanged head [8, the latter preferably being formed on the terminal ends of the leg portions H. The leg portions H are preferably formed with lateral wings l9 so as to present arcuate surfaces of substantial extent and preferably the radius of curvature of said arcuate wings corresponds to the lesser radius of curvature B of the aperture I l. The ends of the wings normally may be distorted radially outward Fig. 4 so as to be forced inwardly as the connector is forced through the aligned apertures ll Fig. 8 and thus cause the arcuate leg portion to engage under tension the lesser radius edge of the strip aperture H throughout a substantial extent. Rotation of the leg portions relative to the lesser radius edge is prevented by the elements l2, which as shown in Fig. 8, position the leg portions in engagement with the respective lesser radius edges of the apertures H.
The connector is preferably provided with support-engaging and locking means for locking the connector and connected conductors in assembled relation with the support I. Advantageously, the support-locking means is in the form of one or more resilient tongues connected to the bottom bight portion I6 extending outward:- ly therefrom, between the opposed legs H a distance substantially less than the length of the legs 17, equal substantially to the combined thickness of the support i and the overlapping conductors Hi. Thus when the connector is forced through the support aperture 2, the tongues 20 will expand radially outwardly and snap under the face of the support I opposite the face on which the conductors are. mounted. It will be apparent that the length of thetongues 20 will be so proportioned to the length of the legs I! and the combined thickness of the support I and conductors ii], that when the connector is locked in the support I, the flanged head will overlie and engage the outermost conductor to hold the parts in assembled relation as well as in good electrical contact.
From the above description it will be apparent that the invention provides a simple, economical yet emcient solderless connector for strip conductors. It also provides a simple and convenient means of securing said connected conductors to an apertured supporting panel, permitting ready assembly of the conductors on the panels to complete the desired circuit prior to superimposing the second insulating panel 3.
Furthermore, as will be apparent, the elongated circular form of the conductor aperture and the resilience of the leg portions ll of the connector combine to maintain a good electrical contact between the aperture walls of the conductors and the arcuate contact wings l9 even though some shifting of one conductor relative to another is required.
Although I have illustrated and described a preferred embodiment of the invention it will be understood that I do not intend to be limited thereto as the scope of the invention is best defined in the appended claims.
I claim:
1. In an electrical installation, a pair of striplike conductors each provided with an elongated circular aperture of varying radii adapted tov be assembled in overlapping relation with their apertures in substantial alignment, and an elongated sheet metal connector fitted in said apertures and having spaced resilient arcuate sections adapted for tensioned electrical line contact engagement with an arcuate portion of lesser radii of the aperture wall of each conductor,
said portion of one conductor being disposed. op-
posite said portion of the other.
In an electrical installation, a pair. of relatively fiat ribbon-like strip conductors adapted to be connected in overlapping relation, each of said strips provided with an elongated circular opening of varying radii, a substantially U -shaped connector fitted in said apertures, the legs of said U-shaped connector being of arcuate cross section for tensioned electrical line contact engagement with an arcuate portion of lesser radii of the aperture wall of each conductor, said portion of one conductor being disposed opposite said portion of the other.
3. In an electrical installation, a pair of ribbon-like sheet metal conductors arranged with portions thereof. in overlapping relation, the coinciding, portions of said conductors being provided with connector-receiving apertures each having arcuate wall portions of varying radii, and a substantially U-shaped connector inserted through said coinciding apertures and having opposed arcuate resilient leg portions each adapted to make substantially an electrical. line contact with the portion of the arcuate aperture wall of lesser radii of one of said conductors.
4. In an electrical installation, a pair of relatively flat ribbon-like conductors adapted to be connected in overlapping relation, each of said strips provided with an elongated circular opening having side edges of two different radii, positioning elements extending into saidopenings adjacent the intersection. of the side edges of different radii, a substantially U-shaped connector fitted in said openings, the legs of said U-shaped connector being of arcuate cross-section for tensioned electrical line contact engagement each with the strip aperture edge of lesser radii of one of the conductors and secured in tensioned engagement each with the positioning elements definingv the corresponding strip aperture edge of lesser radii.
5. An electrical connector for apertured strip conductors comprising a substantially U-shaped member having a bight portion, opposed leg portions, laterally extending. wings on said leg portions, said wings and said leg portions having arcuate cross-section in planes normal thereto. said wings and said leg portions being radially resilient and providing radiallyresilient conductor aperture-edge-contactingportions, opposed outwardly extending oppositely directed lateral flanges on the free ends of said leg portions, and laterally resilient support-engaging means extending angularly outwardly toward the plane of said flanges from the opposite side edges of said bight portion.
FREDERICK S. SAMPSON.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Powell May 12, 1942
US48483A 1948-09-09 1948-09-09 Electrical connection for strip conductors Expired - Lifetime US2623086A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2863131A (en) * 1955-01-03 1958-12-02 Sylvania Electric Prod Tube socket
US2966652A (en) * 1957-03-12 1960-12-27 Burroughs Corp Through clip connector for printed circuit board
US2972727A (en) * 1958-07-01 1961-02-21 United Carr Fastener Corp Printed circuit assembly
US3145037A (en) * 1963-03-07 1964-08-18 Lansing Sound Spring fastener
US3613043A (en) * 1969-04-30 1971-10-12 Amp Inc Printed circuit board connector
US5115375A (en) * 1989-09-05 1992-05-19 Switchcraft Inc. Snap-in retainer sleeve
US20080227315A1 (en) * 2007-03-16 2008-09-18 Shigeki Banno Terminal and connecting structure between terminal and board
US20120124792A1 (en) * 2009-06-29 2012-05-24 Nifco Inc. Clip and clip device
US10280953B2 (en) * 2014-10-08 2019-05-07 Airbus Heicopters Deutschland Gmbh Composite laminate and load-introduction component for a load-introduction joint

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1756332A (en) * 1928-02-18 1930-04-29 American Flyer Mfg Co Combined motor bearing and brush holder
US1881811A (en) * 1930-09-17 1932-10-11 Guide Lamp Corp Lamp socket
US1888384A (en) * 1931-08-03 1932-11-22 Claude Neon Electrical Product Electrical terminal
US1965964A (en) * 1930-02-20 1934-07-10 Waterbury Brass Goods Corp Radio tube connecter
US1987035A (en) * 1931-07-25 1935-01-08 George T Tideman Connecter for electric outlet boxes
US2041336A (en) * 1933-03-15 1936-05-19 United Carr Fastener Corp Fastener secured installation and fastener member therefor
US2184783A (en) * 1936-10-14 1939-12-26 Albert H Tinnerman Fastening device
US2211739A (en) * 1937-07-20 1940-08-13 United Carr Fastener Corp Lamp socket and lamp socket installations
US2283125A (en) * 1939-01-13 1942-05-12 United Carr Fastener Corp Locking snap fastener

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1756332A (en) * 1928-02-18 1930-04-29 American Flyer Mfg Co Combined motor bearing and brush holder
US1965964A (en) * 1930-02-20 1934-07-10 Waterbury Brass Goods Corp Radio tube connecter
US1881811A (en) * 1930-09-17 1932-10-11 Guide Lamp Corp Lamp socket
US1987035A (en) * 1931-07-25 1935-01-08 George T Tideman Connecter for electric outlet boxes
US1888384A (en) * 1931-08-03 1932-11-22 Claude Neon Electrical Product Electrical terminal
US2041336A (en) * 1933-03-15 1936-05-19 United Carr Fastener Corp Fastener secured installation and fastener member therefor
US2184783A (en) * 1936-10-14 1939-12-26 Albert H Tinnerman Fastening device
US2211739A (en) * 1937-07-20 1940-08-13 United Carr Fastener Corp Lamp socket and lamp socket installations
US2283125A (en) * 1939-01-13 1942-05-12 United Carr Fastener Corp Locking snap fastener

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2863131A (en) * 1955-01-03 1958-12-02 Sylvania Electric Prod Tube socket
US2966652A (en) * 1957-03-12 1960-12-27 Burroughs Corp Through clip connector for printed circuit board
US2972727A (en) * 1958-07-01 1961-02-21 United Carr Fastener Corp Printed circuit assembly
US3145037A (en) * 1963-03-07 1964-08-18 Lansing Sound Spring fastener
US3613043A (en) * 1969-04-30 1971-10-12 Amp Inc Printed circuit board connector
US5115375A (en) * 1989-09-05 1992-05-19 Switchcraft Inc. Snap-in retainer sleeve
US20080227315A1 (en) * 2007-03-16 2008-09-18 Shigeki Banno Terminal and connecting structure between terminal and board
US20120124792A1 (en) * 2009-06-29 2012-05-24 Nifco Inc. Clip and clip device
US10280953B2 (en) * 2014-10-08 2019-05-07 Airbus Heicopters Deutschland Gmbh Composite laminate and load-introduction component for a load-introduction joint
US11274688B2 (en) 2014-10-08 2022-03-15 Airbus Helicopters Deutschland GmbH Composite laminate and load-introduction component for a load-introduction joint

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