US3521224A - Electrical connector having a ferrule provided with overlapping portions - Google Patents
Electrical connector having a ferrule provided with overlapping portions Download PDFInfo
- Publication number
- US3521224A US3521224A US656497A US3521224DA US3521224A US 3521224 A US3521224 A US 3521224A US 656497 A US656497 A US 656497A US 3521224D A US3521224D A US 3521224DA US 3521224 A US3521224 A US 3521224A
- Authority
- US
- United States
- Prior art keywords
- ferrule
- sleeve
- electrical connector
- connector
- wire
- 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
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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
- 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
- H01R4/20—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 using a crimping sleeve
- H01R4/203—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 using a crimping sleeve having an uneven wire-receiving surface to improve the contact
- H01R4/206—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 using a crimping sleeve having an uneven wire-receiving surface to improve the contact with transversal grooves or threads
Definitions
- an electrical connector which comprises a tubular electrical ferrule, for example of copper and which has been rolled from an elongate metal blank.
- the longitudinal edges of the blank form a seam extending longitudinally of the ferrule, these edges being arranged in butt relationship so that the ferrule has an overall smooth outer surface.
- a sleeve of plastic insulating material surrounds the ferrule, the insulating material being such that the ferrule can be crimped to a wire inserted thereinto by applying crimping pressure to the insulating sleeve.
- the connector is normally crimped to the wire by the application of a substantially even crimping pressure about the circumference of the insulating sleeve.
- a seamless copper sleeve is preferably interposed between the ferrule and the insulating sleeve.
- the longitudinal marginal portions of the blank from which the ferrule is formed are arranged in overlapping relationship, so that the wall thickness of the ferrule is doubled over a portion of its circumference for example over about a quarter of its circumference. It has been found that where the ferrule is formed in this way, the connector can be crimped to provide an improved connection between the wire and the connector.
- the sleeve, the ferrule and the wire sizes and the applied crimping pressure need not however be as accurately predetermined, as in the case of the known connector.
- An object of the invention is to provide a ferrule of an electrical connector with means provided thereby for increasing the tensile strength when the ferrule is crimped onto an electrical wire.
- Another object is the provision of a ferrule of an electrical connector which is provided with overlapping sections which provides an improved connection between the ferrule and a ⁇ w're.
- a further object is to provide a ferrule of an electrical connector with double wall thickness over a portion of the circumference thereof.
- FIG. 1 is a cross-sectional view of a ferrule for crimping to an electrical wire
- FIG. 2 is an axial sectional view of an electrical connector, including the ferrule of FIG. 1; and 1 FIG. 3 is an enlarged cross-sectional view through the connector when crimped to a wire.
- the connector comprises a crimping ferrule 1 having wiregripping serrations 2, a seamless copper sleeve 3 surrounding the ferrule 1 and having a bell mouth 4, and an outer insulating sleeve 5 surrounding the sleeve 3, the sleeve 5 being of tough flexible plastic material, for example nylon or polyvinylchloride.
- the ferrule 1 has been rolled from an elongate sheet metal blank, the longitudinal marginal portions 6 of the blank being arranged in overlapping rleationship, so that the ferrule 1 is of double wall thickness over about a quarter of its circumference.
- the connector is intended to be crimped to a multi stranded or solid insulated electrical wire.
- An end of the electrically-conductive core 7 of the wire which is shown diagrammatically in broken lines in FIG. 1, is first stripped of insulation and is inserted into the connector through the bell mouth 4 so that the stripped end of the core lies within the ferrule 1, the mouth 4 surrounding the terminal part of the insulation.
- a pair of crimping dies (not shown) are now applied to the connector to exert upon the sleeve 5 a substantially even pressure about the circumference of the sleeve 5, so that the ferrule 1 is tightly compressed about the core 7 as shown in FIG. 3, the core (which is shown diagrammatically in FIG.
- the effect of arranging the marginal portions 6 in overlapping relationship as described above is to increase the tensile strength of the connection between the wire and the connector by at least 50% where for example the wire is of 1 mm. in cross-section, as compared with the case where the ferrule is of the same outside diameter but does not have overlapping marginal portions.
- An electrical connector comprising a tubular ferrule rolled from an elongate sheet metal blank and provided with longitudinal marginal portions extending axially of the ferrule so that the wall thickness of the ferrule is doubled over substantially a quarter of its circumference, a sleeve of plastic material surrounding said ferrule and through which the ferrule can be crimped to a wire inserted into the ferule, the marginal portions of the ferrule being free to slide with respect to one another circumferentially of the ferrule, and a metal sleeve interposed between said sleeve of plastic material and said ferrule.
- An electrical connector comprising a tubular ferrule rolled from an elongate sheet metal blank and provided with longitudinal marginal portions extending axially of the ferrule so that the wall thickness of the ferrule is doubled over at least 90 of its circumference, the marginal portions being free for relative sliding movement circumferentially of the ferrule, a sleeve of plastic material surrounding said ferrule and through which the ferrule can be crimped to a wire inserted into the ferrule, a metal sleeve being interposed between the sleeve of plastic material and the ferrule, and serrations being provided on an inside surface of the ferrule.
Landscapes
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
- Multi-Conductor Connections (AREA)
- Manufacturing Of Electrical Connectors (AREA)
Description
July 21, 1970 MM, SP'QOREN 3,521,224
TRICAL CONNE AVING A FERRULE EL CTO VIDED x H OVER PING PORTIONS F 1 July 27. 1967 I I i will/11111711 3,521,224 ELECTRICAL CONNECTOR HAVING A FERRULE PROVIDED WITH OVERLAPPING PORTIONS Martinus Johannes Albertus Spooren, s-Hertogenbosch,
Netherlands, assignor to AMP Incorporated, Harrisburg, Pa.
Filed July 27, 1967, Ser. No. 656,497 Claims priority, application Netherlands, July 19, 1966,
Int. Cl. H01r 11/28 U.S. Cl. 339-276 2 Claims ABSTRACT OF THE DISCLOSURE A ferrule of an electrical connector is provided with overlapping portions in an axial direction therealong thereby increasing the tensile strength when crimped onto an electrical wire or the like.
In U.S. Pat. No. 2,654,873 there is described an electrical connector which comprises a tubular electrical ferrule, for example of copper and which has been rolled from an elongate metal blank. The longitudinal edges of the blank form a seam extending longitudinally of the ferrule, these edges being arranged in butt relationship so that the ferrule has an overall smooth outer surface. A sleeve of plastic insulating material surrounds the ferrule, the insulating material being such that the ferrule can be crimped to a wire inserted thereinto by applying crimping pressure to the insulating sleeve. The connector is normally crimped to the wire by the application of a substantially even crimping pressure about the circumference of the insulating sleeve. A seamless copper sleeve is preferably interposed between the ferrule and the insulating sleeve. To form a satisfactory electrical connection with the use of such a connector, it is essential that the sleeve, ferrule and wire sizes should be precisely determined and that crimping should be carried out with a tool having a full stroke mechanism for example as described in U.S. Pat. No. 2,618,993 so that the required crimping pressure is always achieved.
According to the invention, the longitudinal marginal portions of the blank from which the ferrule is formed are arranged in overlapping relationship, so that the wall thickness of the ferrule is doubled over a portion of its circumference for example over about a quarter of its circumference. It has been found that where the ferrule is formed in this way, the connector can be crimped to provide an improved connection between the wire and the connector. The sleeve, the ferrule and the wire sizes and the applied crimping pressure need not however be as accurately predetermined, as in the case of the known connector.
An object of the invention is to provide a ferrule of an electrical connector with means provided thereby for increasing the tensile strength when the ferrule is crimped onto an electrical wire.
Another object is the provision of a ferrule of an electrical connector which is provided with overlapping sections which provides an improved connection between the ferrule and a \w're.
A further object is to provide a ferrule of an electrical connector with double wall thickness over a portion of the circumference thereof.
Other objects and attainments of the present invention will become apparent to those skilled in the art upon a reading of the following detailed description when taken in conjunction with the drawings in which there is shown and described an illustrative embodiment of the invention; it is to be understood, however, that this embodiment United States Patent 3,521,224 Patented July 21, 1970 is not intended to be exhaustive nor limiting of the invention but is given for purposes of illustration in order that others skilled in the art may fully understand the invention and the principles thereof and the manner of applying it in practical use so that they may modify it in various forms, each as may be best suited to the conditions of a particular use.
For a better understanding of the invention, reference will now be made to the accompanying drawings, in which:
FIG. 1 is a cross-sectional view of a ferrule for crimping to an electrical wire;
FIG. 2 is an axial sectional view of an electrical connector, including the ferrule of FIG. 1; and 1 FIG. 3 is an enlarged cross-sectional view through the connector when crimped to a wire.
Reference will now be made to FIGS. 1 and 2. The connector comprises a crimping ferrule 1 having wiregripping serrations 2, a seamless copper sleeve 3 surrounding the ferrule 1 and having a bell mouth 4, and an outer insulating sleeve 5 surrounding the sleeve 3, the sleeve 5 being of tough flexible plastic material, for example nylon or polyvinylchloride. The ferrule 1 has been rolled from an elongate sheet metal blank, the longitudinal marginal portions 6 of the blank being arranged in overlapping rleationship, so that the ferrule 1 is of double wall thickness over about a quarter of its circumference.
The connector is intended to be crimped to a multi stranded or solid insulated electrical wire. An end of the electrically-conductive core 7 of the wire, which is shown diagrammatically in broken lines in FIG. 1, is first stripped of insulation and is inserted into the connector through the bell mouth 4 so that the stripped end of the core lies within the ferrule 1, the mouth 4 surrounding the terminal part of the insulation. A pair of crimping dies (not shown) are now applied to the connector to exert upon the sleeve 5 a substantially even pressure about the circumference of the sleeve 5, so that the ferrule 1 is tightly compressed about the core 7 as shown in FIG. 3, the core (which is shown diagrammatically in FIG. 3) being extruded longitudinally under the crimping pressure so that a tight connection is formed between the ferrule 1 and the core. The upper (as seen in FIG. 3) marginal portion 6 is forced against and bedded into the lower (as seen in FIG. 3) marginal portion 6 so that relaxation of the portion of the ferrule 1 which engages the core 7 is restrained, the sleeve 3 also serving to restrain relaxation of the crimped ferrule.
It has been found that the effect of arranging the marginal portions 6 in overlapping relationship as described above is to increase the tensile strength of the connection between the wire and the connector by at least 50% where for example the wire is of 1 mm. in cross-section, as compared with the case where the ferrule is of the same outside diameter but does not have overlapping marginal portions.
It will, therefore, be appreciated that the aforementioned and other desirable objects have been achieved; however, it should be emphasized that the particular embodiment of the invention, which is shown and described herein, is intended as merely illustrative and not as restrictive of the invention.
What is claimed is:
1. An electrical connector comprising a tubular ferrule rolled from an elongate sheet metal blank and provided with longitudinal marginal portions extending axially of the ferrule so that the wall thickness of the ferrule is doubled over substantially a quarter of its circumference, a sleeve of plastic material surrounding said ferrule and through which the ferrule can be crimped to a wire inserted into the ferule, the marginal portions of the ferrule being free to slide with respect to one another circumferentially of the ferrule, and a metal sleeve interposed between said sleeve of plastic material and said ferrule.
2. An electrical connector comprising a tubular ferrule rolled from an elongate sheet metal blank and provided with longitudinal marginal portions extending axially of the ferrule so that the wall thickness of the ferrule is doubled over at least 90 of its circumference, the marginal portions being free for relative sliding movement circumferentially of the ferrule, a sleeve of plastic material surrounding said ferrule and through which the ferrule can be crimped to a wire inserted into the ferrule, a metal sleeve being interposed between the sleeve of plastic material and the ferrule, and serrations being provided on an inside surface of the ferrule.
References Cited FOREIGN PATENTS 10/1966 Canada.
2/1947 Great Britain.
RICHARD E. MOORE, Primary Examiner U.S. Cl. X.R.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL6610131A NL6610131A (en) | 1966-07-19 | 1966-07-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3521224A true US3521224A (en) | 1970-07-21 |
Family
ID=19797213
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US656497A Expired - Lifetime US3521224A (en) | 1966-07-19 | 1967-07-27 | Electrical connector having a ferrule provided with overlapping portions |
Country Status (6)
Country | Link |
---|---|
US (1) | US3521224A (en) |
DE (1) | DE1615625C3 (en) |
ES (1) | ES341887A1 (en) |
GB (1) | GB1124230A (en) |
NL (1) | NL6610131A (en) |
SE (1) | SE330403B (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4641911A (en) * | 1984-10-09 | 1987-02-10 | General Motors Corporation | Electrical connector having a funnel wrap wire crimp barrel |
US4932906A (en) * | 1988-12-16 | 1990-06-12 | Amp Incorporated | Electrical contact terminal |
US4950186A (en) * | 1988-12-16 | 1990-08-21 | Amp Incorporated | Electrical contact terminal |
US4951389A (en) * | 1989-05-31 | 1990-08-28 | Amp Incorporated | Method for making a wire barrel terminal |
US5017161A (en) * | 1988-06-21 | 1991-05-21 | Legrand | Electric terminal connector |
US5203726A (en) * | 1992-02-11 | 1993-04-20 | Molex Incorporated | Insulated electrical terminal and method of fabricating same |
US5522739A (en) * | 1994-04-15 | 1996-06-04 | Panduit Corp. | Insulated terminal with integral dual flared barrel |
US6086433A (en) * | 1997-09-18 | 2000-07-11 | Contact Gmbh & Co. Kg | Plug socket for electrically connecting a cable or the like having a stripped wire portion with a flat plug |
WO2009016429A2 (en) * | 2007-07-30 | 2009-02-05 | Fci | Crimpable connector contact assembly for cable connector, cable connector and method for manufacturing thereof |
US20090218134A1 (en) * | 2006-05-05 | 2009-09-03 | Dieter Stroh | Connecting Passage Node or End Node and Method for Production Thereof |
WO2015150464A1 (en) * | 2014-04-01 | 2015-10-08 | Te Connectivity Amp España, S.L.U. | Shielded telecommunications connector |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2347713A (en) * | 1941-03-19 | 1944-05-02 | Burndy Engineering Co Inc | Tool installed connector and process for its installation |
GB585670A (en) * | 1942-11-14 | 1947-02-18 | Aircraft Marine Prod Inc | Improvements in electrical connectors |
US2763849A (en) * | 1952-03-01 | 1956-09-18 | Aircraft Marine Prod Inc | Electrical connector |
US2786192A (en) * | 1952-04-09 | 1957-03-19 | Amp Inc | Electrical connector |
CA744073A (en) * | 1966-10-04 | Amp Incorporated | Electrical connector pins | |
US3286223A (en) * | 1964-05-18 | 1966-11-15 | Itt | Ferrule construction and a method for producing same |
-
1966
- 1966-07-19 NL NL6610131A patent/NL6610131A/xx unknown
-
1967
- 1967-06-16 ES ES341887A patent/ES341887A1/en not_active Expired
- 1967-06-27 GB GB29576/67A patent/GB1124230A/en not_active Expired
- 1967-06-28 SE SE09427/67*A patent/SE330403B/xx unknown
- 1967-07-17 DE DE1615625A patent/DE1615625C3/en not_active Expired
- 1967-07-27 US US656497A patent/US3521224A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA744073A (en) * | 1966-10-04 | Amp Incorporated | Electrical connector pins | |
US2347713A (en) * | 1941-03-19 | 1944-05-02 | Burndy Engineering Co Inc | Tool installed connector and process for its installation |
GB585670A (en) * | 1942-11-14 | 1947-02-18 | Aircraft Marine Prod Inc | Improvements in electrical connectors |
US2763849A (en) * | 1952-03-01 | 1956-09-18 | Aircraft Marine Prod Inc | Electrical connector |
US2786192A (en) * | 1952-04-09 | 1957-03-19 | Amp Inc | Electrical connector |
US3286223A (en) * | 1964-05-18 | 1966-11-15 | Itt | Ferrule construction and a method for producing same |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4641911A (en) * | 1984-10-09 | 1987-02-10 | General Motors Corporation | Electrical connector having a funnel wrap wire crimp barrel |
US5017161A (en) * | 1988-06-21 | 1991-05-21 | Legrand | Electric terminal connector |
US4932906A (en) * | 1988-12-16 | 1990-06-12 | Amp Incorporated | Electrical contact terminal |
US4950186A (en) * | 1988-12-16 | 1990-08-21 | Amp Incorporated | Electrical contact terminal |
US4951389A (en) * | 1989-05-31 | 1990-08-28 | Amp Incorporated | Method for making a wire barrel terminal |
US5203726A (en) * | 1992-02-11 | 1993-04-20 | Molex Incorporated | Insulated electrical terminal and method of fabricating same |
US5522739A (en) * | 1994-04-15 | 1996-06-04 | Panduit Corp. | Insulated terminal with integral dual flared barrel |
US6086433A (en) * | 1997-09-18 | 2000-07-11 | Contact Gmbh & Co. Kg | Plug socket for electrically connecting a cable or the like having a stripped wire portion with a flat plug |
US20090218134A1 (en) * | 2006-05-05 | 2009-09-03 | Dieter Stroh | Connecting Passage Node or End Node and Method for Production Thereof |
US8288653B2 (en) * | 2006-05-05 | 2012-10-16 | Schunk Sonosystems Gmbh | Connecting passage node or end node and method for production thereof |
WO2009016429A3 (en) * | 2007-07-30 | 2009-03-26 | Framatome Connectors Int | Crimpable connector contact assembly for cable connector, cable connector and method for manufacturing thereof |
WO2009016429A2 (en) * | 2007-07-30 | 2009-02-05 | Fci | Crimpable connector contact assembly for cable connector, cable connector and method for manufacturing thereof |
US20100184340A1 (en) * | 2007-07-30 | 2010-07-22 | Bernardus Paagman | Crimpable connector contact assembly for cable connector, cable connector and method for manufacturing thereof |
WO2015150464A1 (en) * | 2014-04-01 | 2015-10-08 | Te Connectivity Amp España, S.L.U. | Shielded telecommunications connector |
CN106797077A (en) * | 2014-04-01 | 2017-05-31 | 康普连通西班牙公司 | Protected type communications connector |
US9979133B2 (en) | 2014-04-01 | 2018-05-22 | CommScope Connectivity Spain, S.L. | Shielded telecommunications connector |
CN106797077B (en) * | 2014-04-01 | 2019-09-20 | 康普连通西班牙公司 | Protected type communications connector |
US10498088B2 (en) | 2014-04-01 | 2019-12-03 | CommScope Connectivity Spain, S.L. | Shielded telecommunications connector |
US10958018B2 (en) | 2014-04-01 | 2021-03-23 | CommScope Connectivity Spain, S.L. | Shielded telecommunications connector |
US11476622B2 (en) | 2014-04-01 | 2022-10-18 | CommScope Connectivity Spain, S.L. | Shielded telecommunications connector |
Also Published As
Publication number | Publication date |
---|---|
GB1124230A (en) | 1968-08-21 |
NL6610131A (en) | 1968-01-22 |
ES341887A1 (en) | 1968-07-16 |
DE1615625B2 (en) | 1973-08-30 |
DE1615625A1 (en) | 1970-05-27 |
SE330403B (en) | 1970-11-16 |
DE1615625C3 (en) | 1974-09-26 |
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