CA1124349A - Coaxial contact assembly for captivating inner pin-socket electrical contacts - Google Patents
Coaxial contact assembly for captivating inner pin-socket electrical contactsInfo
- Publication number
- CA1124349A CA1124349A CA355,550A CA355550A CA1124349A CA 1124349 A CA1124349 A CA 1124349A CA 355550 A CA355550 A CA 355550A CA 1124349 A CA1124349 A CA 1124349A
- Authority
- CA
- Canada
- Prior art keywords
- pin
- socket
- housing
- dielectric
- assembly
- 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
Links
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
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
- H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
- H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
- H01R9/0518—Connection to outer conductor by crimping or by crimping ferrule
Landscapes
- Coupling Device And Connection With Printed Circuit (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The invention is directed to an electrical contact assembly for terminating two coaxial cables, with substantial captivation of the inner pin-socket contacts. This contact assembly comprises a pin assembly and a socket assembly which, in mated condition, are in overlapping conductive re-lation; pin member and socket members with said respective pin and socket housings are capable of mating to provide electrical contact, with abutting non-conductive surfaces on said pin member and said socket housing; each of said housings can admit a coaxial cable at the rear of the housing; the end of the inner conductor of the cable can enter a pin barrel or socket barrel, where it is held by a crimp. The end portion of the outer conductor of each cable fits over a barrel on the end of each housing; dielectric material with each of said housings insulate the pin or socket members from the respective housing and the dielectric within said housings extends underneath the respect-ive end portions of cable outer conductors and provides abutments which bar cable inner dielectric from physical contact with the pin-socket contacts;
ferrule crimp means encircle the sandwich which is formed at each end of the contact assembly, where crimping of said ferrules captivates the pin-socket contacts against the pull of the cable inner dielectrics and inner conductors.
The invention is directed to an electrical contact assembly for terminating two coaxial cables, with substantial captivation of the inner pin-socket contacts. This contact assembly comprises a pin assembly and a socket assembly which, in mated condition, are in overlapping conductive re-lation; pin member and socket members with said respective pin and socket housings are capable of mating to provide electrical contact, with abutting non-conductive surfaces on said pin member and said socket housing; each of said housings can admit a coaxial cable at the rear of the housing; the end of the inner conductor of the cable can enter a pin barrel or socket barrel, where it is held by a crimp. The end portion of the outer conductor of each cable fits over a barrel on the end of each housing; dielectric material with each of said housings insulate the pin or socket members from the respective housing and the dielectric within said housings extends underneath the respect-ive end portions of cable outer conductors and provides abutments which bar cable inner dielectric from physical contact with the pin-socket contacts;
ferrule crimp means encircle the sandwich which is formed at each end of the contact assembly, where crimping of said ferrules captivates the pin-socket contacts against the pull of the cable inner dielectrics and inner conductors.
Description
This invention relates to multiaxial cables, connectors, and co-axial contact assemblies therefor. More particularly, the invention relates to termination of multiaxial cables, and, especially, to termination of min-iature cables through contact assemblies usable in multipin electrical con-nectors and multicable electrical connectors.
In general, coaxial cables are made up of: an inner conductor, which may be solid, stranded, bala~ced line, etc., made from copper, tin plated copper, silver plated copper, copper covered steel~ etc.; a dielectric material which may be solid, foamed, tape, helical wrap, and like from nat-ural or synthetic elastomers and polymers; an outer conductor (sheath) which usually is braided copper wire or copper strip, which may be bare or plated, and more than one braid may be used. The outer conductor is covered by a protective, electrically insulating jacket which is usually a solid covering made of synthetic elastomer or polymer.
Triaxial cable adds another dielectric material layer over the first outer conductor and adds a second outer conductor over the second dielectric layer. The triaxial cable is protected like a coaxial cable.
All multiaxial cables must be terminated. Most commonly terminat-ions involve the connection of two cable ends to complete a circuit or, in effect, lengthen the cable to reach a more distant location. These terminat-ions involve electrical connectors: which may be for connecting two cables only, or as a contact assembly be used in conjunction with wire or other contact assemblies in a multipin or multicable electrical connector.
Coaxial cable because of its complex structure is easily affected by atmospheric conditions and/or electrical interaction of the different mat-erials in the sandwich of conductors and dielectric. The protective ]acket, itself a dielectric5 also has an effect on the electrical interaction. All these materials have coefficients of expansion and these can be widely differ-e~
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ent in a giv0n cable. As a result tllc members of the cable have different length potentials at cable temperatures other than standard temperature.
When the inner conductor is terminated in a pin-socket contact and the inner dielectric, i.e., the cable dielectric adjacent to the inner con-ductor is not restrained, temperature changes may cause the inner dielectric to expand against the inner pin-socket contact, or even flow over and around the inner pin-socket contact, resulting in undesirable, and even intolerable, electrical changes at the inner pin-socket contact.
The inner conductor does change length with temperature change, tending with increasing length to reinforce the disturbance caused by the inner dielectric length change. When the inner conductors terminated in an inner pin-socket contact shorten, they try to pull the inner pin-socket con-tact apart.
It is known to place a crimp sleeve over the tail of the housing, the outer conductor extending over the tail, the cable dielectric extending into the housing, and the inner conductor outside of the barrel of the pin (or socket). The sleeve is crimped to fasten these members and to captivate the cable dielectric. It has been found that this procedure does not give satisfactory captivatîon. The dielectric material is not held tightly enough by the sleeve crimp and the cable dielectric soon shows undesired axial movement, and disturbances in the electrical state at the inner pin-socket contact.
It has been found that the effects of the undesired axial movement of the inner dielectric material can be minimized by a mechanical restraint applied to the inner pin-socket contact.
SUMMARY OF THE INVENTION
This invention is directed to a contact assembly for terminating two multiaxial cables, under conditions where the inner pin-socket contact ,., ~
`r of said contact assembly is substantially captivated against axial movement.
In general, coaxial cables are made up of: an inner conductor, which may be solid, stranded, bala~ced line, etc., made from copper, tin plated copper, silver plated copper, copper covered steel~ etc.; a dielectric material which may be solid, foamed, tape, helical wrap, and like from nat-ural or synthetic elastomers and polymers; an outer conductor (sheath) which usually is braided copper wire or copper strip, which may be bare or plated, and more than one braid may be used. The outer conductor is covered by a protective, electrically insulating jacket which is usually a solid covering made of synthetic elastomer or polymer.
Triaxial cable adds another dielectric material layer over the first outer conductor and adds a second outer conductor over the second dielectric layer. The triaxial cable is protected like a coaxial cable.
All multiaxial cables must be terminated. Most commonly terminat-ions involve the connection of two cable ends to complete a circuit or, in effect, lengthen the cable to reach a more distant location. These terminat-ions involve electrical connectors: which may be for connecting two cables only, or as a contact assembly be used in conjunction with wire or other contact assemblies in a multipin or multicable electrical connector.
Coaxial cable because of its complex structure is easily affected by atmospheric conditions and/or electrical interaction of the different mat-erials in the sandwich of conductors and dielectric. The protective ]acket, itself a dielectric5 also has an effect on the electrical interaction. All these materials have coefficients of expansion and these can be widely differ-e~
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ent in a giv0n cable. As a result tllc members of the cable have different length potentials at cable temperatures other than standard temperature.
When the inner conductor is terminated in a pin-socket contact and the inner dielectric, i.e., the cable dielectric adjacent to the inner con-ductor is not restrained, temperature changes may cause the inner dielectric to expand against the inner pin-socket contact, or even flow over and around the inner pin-socket contact, resulting in undesirable, and even intolerable, electrical changes at the inner pin-socket contact.
The inner conductor does change length with temperature change, tending with increasing length to reinforce the disturbance caused by the inner dielectric length change. When the inner conductors terminated in an inner pin-socket contact shorten, they try to pull the inner pin-socket con-tact apart.
It is known to place a crimp sleeve over the tail of the housing, the outer conductor extending over the tail, the cable dielectric extending into the housing, and the inner conductor outside of the barrel of the pin (or socket). The sleeve is crimped to fasten these members and to captivate the cable dielectric. It has been found that this procedure does not give satisfactory captivatîon. The dielectric material is not held tightly enough by the sleeve crimp and the cable dielectric soon shows undesired axial movement, and disturbances in the electrical state at the inner pin-socket contact.
It has been found that the effects of the undesired axial movement of the inner dielectric material can be minimized by a mechanical restraint applied to the inner pin-socket contact.
SUMMARY OF THE INVENTION
This invention is directed to a contact assembly for terminating two multiaxial cables, under conditions where the inner pin-socket contact ,., ~
`r of said contact assembly is substantially captivated against axial movement.
-2-~ 24349 The invention provides a coaxial contact assembly for captivating inner pin-socket electrical contacts, wh;ch contact assembly comprises:
a pin housing and a socket housing for overlapped electrically conductive joinder;
pin member and socket member located with said corresponding housi.ngs, for electrical mating;
said pin member and said socket housing having abutting, non-con-ductive relati.on when in the mated condition;
said pin member and said socket member each having a barrel for receiving a coaxial cable inner conductor to be terminated within said contact assembly;
said pin housing and said socket housing each having a barrel port-ion over which an outer conductor end portion of corresponding coaxials can be positioned;
dielectric material within each of said pin housing and said socket ::
housing to insulate the respective housing from its corresponding pin or socket member, said dielectric material extending beyond the corresponding barrel, beneath the corresponding outer conductor end portion, and forward to provide abutments at the barrel end of said socket member against forward axial movement of a cable inner dielectric and backward movement of said inner pin-socket contact, and to provide abutment for the inner dielectric of a second cable and to provide dielectric surface at sai.d pin member for afore-said abutting socket housing-pin member relation; and ferrule crimp means encircling corresponding: housing barrel, extended dielectric material, cable inner dielectric and cable inner conduct-or, whereby when said cables are in position in the contact assembly, crimping said ferrules substantially captivates the inner pin-socket contacts ~ - -~:
:
against axial movement; and where said housing dielectrics are substantially rigid, insulating materials with high resistance to cold flow.
The invention will further be descri~ed, by way of example only, with reference to the accompanying drawing, wherein:
Figures 1, la, and lb form one complete figure which shows one embodiment of the multiaxial contact assembly of the invention. For clarity in presentation, a miniature contact assembly was enlarged about 20/1, which enlargement forced cutting the drawing into three sections along the longi-lQ tudinal dimension, to meet space limitations for individual sheets.
DESCRIPTION OF A PREFERRED EMBODIMENT
The embodiment as shown is suitable for use in conjunction with a multipin connector, for example, the multipin connector of Cooper and Howett, United Sta~es of America Patent No. 4,056,298. ~hen used alone to terminate two cables, the embodiment needs protection against physical abuse, such as, a protective encasement, which encasements are welI known in the coaxial con-nector art.
It is pointed out that the drawing shows the contact assembly in a partially mated condition. This has been done to provide more space at the pin-socket contact zone, to show the various members in the zone. As is self-evident, the contact assembly is brought into abutting relation of the pin member and the socket housing member, when the pin and socket are fully mated.
In the figures, the coaxial contact assembly for captivating inner pin-socket electrical contacts of the invention comprises an electrical socket assembly 10 (Figures l la) for mating with an electrical pin assembly 70 (Figures la-lb). Socket assembly 10 is also referred to as the male assembly and pin assembly 70 is also referred to as the female assembly.
_4_ In Figure 1, an end portion of a coaxial cable 14 is shown. Co-axial cable 14 is made up of inner conductor 18, inner dielectric material 20, and double braided outer conductor 22 and 24. The protective jacket, not shown, stops outside the figure. It is to be understood that the coaxial cable ends are shown to illustrate the utility of the invention, but are not part of the invention.
Socket assembly 10 comprises ~Figures l-la) electrical socket member 30 having a pin receiving socket 32 at one end, away from coaxial cable 14, and a barrel 34 at the other end, having a squared rear end 35, for re-ceiving a portion 36 of the inner conductor of the cable 14, when present.
The entry 38 ~Figure la) of socket 32 is bevelled to ease entrance of the pin 92. Socket barrel 34 is sized so that the inner conductor portion 36 may be crimped within the barrel, holding the conductor 36 and improving electric-al contact.
An electrically conductive socket housing 40 ~Figures l-la) is co-axially aligned around socket member 30 and has a cylindrical nose portion 42, which has a relatively squared end 44. The nose portion 42 extends beyond the entry 38 to socket 32. Socket housing 40 has at its other end a cyl-indrical barrel ~tail) portion 46. Barrel 46 can be inserted underneath an end portion 48 of outer conductor braid 22 to make electrical contact there-with.
Dielectric materials 50 ~Figures l-la) and 110 ~Figures la-lb) are substantially rigid, insulating materials with high resistance to cold flow, such as, polyester, polyamide, and polyimide.
Dielectric material 50 is positioned in socket assembly lQ between socket member 30 and socket housing 40 to electrically insulate these from each other and, also, socket member 30 from outer conductor 48; dielectric 50 essentially fills aforesaid space. Dielectric 50 extends back beyond socket ., . - . ~ .. ,~ .~ .. . .
.. ~ .
,: :
: ' ' ' ~ ' 4~9 housing tail portion 46 a substantial distance underneath outer conductor 48, when this is present, so as to underlie a ferrule 60. Dielectric 50 may be in one piece, but normally will consist of more than one piece for greater ease of manufacture and installation. In general, the number of pieces in dielectric 50 is determined by the configuration of the cavity between socket member 30 and socket housing 40. The individual pieces may be formed from the same type of material, or from different mater;als in the defined class of materials.
Herein, dielectric sa is fitted as two pieces 52 and 54 ~Figures 1-la). Piece 52 extends out to socket housing end 44 to insulate electricallynose portion 42 from electrical pin 92, when pin 92 and socket 32 are mated.
Dielectric piece 54 extends roughly from the outer end 61 of ferrule 60, at the approximate level of the outer surface of tail portion 46, underneath ferrule 60, end portion 48 of braid 22, tail portion 46 and for-ward until it abuts rear end 35 of socket barrel 34 at flat end 56. Herein, a shoulder 55 of piece 54 abuts against end 47 of barrel 46, which shoulder 55 restrains piece 54 from movement toward socket barrel 34. Piece 54 is provided with another shoulder 57 against which the inner end of cable inner dielectric 62 can abut in forward axial movement thereof. Ends 56, 57 and the dielectric therebet~een bar the inner dielectric 62 from further move-ment toward the inner pin-socket contact zone and thereby minimize electrical disturbances caused by cable inner dielectric movement.
Socket assembly 10 includes a conductive ferrule crimp means 60.
~errule 60 encircles: socket housing barrel (tail) portion 46, socket assembly dielectric material 54, end portion 48 of outer conductor 22, cable inner dielectric 62, and that portion of cable inner conductor roughly under ferrule 60. Ferrule 60 is of metal capable of being crimped to fasten togeth-er ~1~ the ferrule, the encircled tail portion, and outer conductor; and (2) :
~:
4~49 the ferrule, outer conductor, and dielectric 54 extending beyond the tail portion. The crimp (2~ restrains the inner pin-socket contact against rearward pull of inner dielectric and inner conductor.
An end portion of a second coaxial cable 74 ;s shown in Figure lb.
Cable 74 is made of inner conductor 76, inner dielectric material 78, and a double braid outer conductor 80 and 82. The protective jacket is outside the figure.
Pin assembly 70 as set forth in Figures la-lb comprises an electric-al pin member 90 having a pin 92 at one end, away from cable 74, and a barrel 94 at the other end for receiving a portion 96 of the inner conductor of cable 74. Pin barrel 94 is sized so that inner conductor portion 96 can be crimped therein, holding inner conductor 96 and improving electrical contact.
An electrically conductive pin housing 100 (Figures la-lb) is co-axially aligned around pin member 90 and has a cylindrical taped nose portion 102 having forward end 103, end 103 being divided into a plurality of spring fingers for improving electrical contact with socket nose portion 42. Pin housing 100 has at its other end a cylindrical barrel (tail) portion 106, for insertion underneath an end portion 108 of outer conductor braid 80 and to make electrical contact therewith.
Dielectric material 110 (Figures la-lb) is positioned in pin assembly 70 between pin member 90 and pin housing 100 to insulate electrically these from each other, and also pin housing 100 from inner conductor 112 ~Figure lb). Dielectric 110 essentially fills aforesaid space. Dielectric 110 extends back beyond pin housing barrel (tail) portion 106 a substantial distance underneath outer conductor 80, when this is present, so as to under-lie a ferrule 130.
Herein, dielectric 110 is fitted as three pieces 114, 116 and 118 (Figures la-lb~. Piece 114 goes forward to squared end 120 to insulate pin _7_ :
, . . ' ' ~243'~9 92 from nose end 44 when the pin and socket are mated.
Dielectric piece 118 extends roughly from the outer end 131 of ferrule 130, at the approximate level of the outer surface of tail portion 106~ underneath ferrule 130, end portion of braid 82~ tail portion la6, and forward until it abuts the rear end 117 of dielectric piece 116. Piece 118 is provided with a shoulder 119 aga;nst which the inner end of cable dielectric 132 abuts in forward axial movement and is barred from further movement toward the inner pin-socket contact zone, thereby minimizing electrical disturbance caused by cable dielectric axial movement. Shoulder 120 abutted against end 107 of tail portion 106 helps restrain forward movement o dielectric material 110.
Dielectric 116 runs into dielectric 114, described earlier.
Because of the characteristics of dielectric materials 50 and 110 there is no thermal elongation to force pin 92 and socket 32. Thus inner pin-socket contact is further captivated against axial movement.
Pin assembly 70 includes a conductive ferrule crimp means 130.
Ferrule 130 encircles: p;n housing barrel (tail) portion 106, pin assembly dielectric material 1-18, end portion 108 of outer conductor 80, cable inner dielectric 132, and that portion of cable inner conductor roughly under ferrule 130. Ferrule 130 is of metal capable of being crimped to fasten together (1) the ferrule, outer conductor and the encircled tail portion;
and ~2) the ferrule, outer conductorJ and dielectric 118 extending beyond the tail portion. The crimp (2) restrains the inner pin-socket contact against rearward pull of inner dielectric and inner conductor.
Pin assembly 70 is prGvided with ~Figure la~ a stainless steel protective sleeve, cylindrical, 140, positioned on the exterior of pin housing 100 to protect the spring fingers at the forward end 103 of pin housing nose ~ortion 102.
,' I~LUSTRATI~N: A suitable coaxial cable for termination by the contact assembly of the ;nvention is RG 142/U in size 12 contact in conjunct-ion with a multipin electrical connector. This cable has a solid copper inner conductor; a PTFE dielectric (polytetrafluoroethylene); a braided copper outer conductor; and a FEP protective jacket (fluorinated ethylene propylene).
In the contact assembly, the pin and socket members, the p;n and socket housings, and the cylinder with spring fingers are made from heat treated beryllium copper alloy. The ferrules are soft berylliumcopper alloy. The dielectric material is polyamide.
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a pin housing and a socket housing for overlapped electrically conductive joinder;
pin member and socket member located with said corresponding housi.ngs, for electrical mating;
said pin member and said socket housing having abutting, non-con-ductive relati.on when in the mated condition;
said pin member and said socket member each having a barrel for receiving a coaxial cable inner conductor to be terminated within said contact assembly;
said pin housing and said socket housing each having a barrel port-ion over which an outer conductor end portion of corresponding coaxials can be positioned;
dielectric material within each of said pin housing and said socket ::
housing to insulate the respective housing from its corresponding pin or socket member, said dielectric material extending beyond the corresponding barrel, beneath the corresponding outer conductor end portion, and forward to provide abutments at the barrel end of said socket member against forward axial movement of a cable inner dielectric and backward movement of said inner pin-socket contact, and to provide abutment for the inner dielectric of a second cable and to provide dielectric surface at sai.d pin member for afore-said abutting socket housing-pin member relation; and ferrule crimp means encircling corresponding: housing barrel, extended dielectric material, cable inner dielectric and cable inner conduct-or, whereby when said cables are in position in the contact assembly, crimping said ferrules substantially captivates the inner pin-socket contacts ~ - -~:
:
against axial movement; and where said housing dielectrics are substantially rigid, insulating materials with high resistance to cold flow.
The invention will further be descri~ed, by way of example only, with reference to the accompanying drawing, wherein:
Figures 1, la, and lb form one complete figure which shows one embodiment of the multiaxial contact assembly of the invention. For clarity in presentation, a miniature contact assembly was enlarged about 20/1, which enlargement forced cutting the drawing into three sections along the longi-lQ tudinal dimension, to meet space limitations for individual sheets.
DESCRIPTION OF A PREFERRED EMBODIMENT
The embodiment as shown is suitable for use in conjunction with a multipin connector, for example, the multipin connector of Cooper and Howett, United Sta~es of America Patent No. 4,056,298. ~hen used alone to terminate two cables, the embodiment needs protection against physical abuse, such as, a protective encasement, which encasements are welI known in the coaxial con-nector art.
It is pointed out that the drawing shows the contact assembly in a partially mated condition. This has been done to provide more space at the pin-socket contact zone, to show the various members in the zone. As is self-evident, the contact assembly is brought into abutting relation of the pin member and the socket housing member, when the pin and socket are fully mated.
In the figures, the coaxial contact assembly for captivating inner pin-socket electrical contacts of the invention comprises an electrical socket assembly 10 (Figures l la) for mating with an electrical pin assembly 70 (Figures la-lb). Socket assembly 10 is also referred to as the male assembly and pin assembly 70 is also referred to as the female assembly.
_4_ In Figure 1, an end portion of a coaxial cable 14 is shown. Co-axial cable 14 is made up of inner conductor 18, inner dielectric material 20, and double braided outer conductor 22 and 24. The protective jacket, not shown, stops outside the figure. It is to be understood that the coaxial cable ends are shown to illustrate the utility of the invention, but are not part of the invention.
Socket assembly 10 comprises ~Figures l-la) electrical socket member 30 having a pin receiving socket 32 at one end, away from coaxial cable 14, and a barrel 34 at the other end, having a squared rear end 35, for re-ceiving a portion 36 of the inner conductor of the cable 14, when present.
The entry 38 ~Figure la) of socket 32 is bevelled to ease entrance of the pin 92. Socket barrel 34 is sized so that the inner conductor portion 36 may be crimped within the barrel, holding the conductor 36 and improving electric-al contact.
An electrically conductive socket housing 40 ~Figures l-la) is co-axially aligned around socket member 30 and has a cylindrical nose portion 42, which has a relatively squared end 44. The nose portion 42 extends beyond the entry 38 to socket 32. Socket housing 40 has at its other end a cyl-indrical barrel ~tail) portion 46. Barrel 46 can be inserted underneath an end portion 48 of outer conductor braid 22 to make electrical contact there-with.
Dielectric materials 50 ~Figures l-la) and 110 ~Figures la-lb) are substantially rigid, insulating materials with high resistance to cold flow, such as, polyester, polyamide, and polyimide.
Dielectric material 50 is positioned in socket assembly lQ between socket member 30 and socket housing 40 to electrically insulate these from each other and, also, socket member 30 from outer conductor 48; dielectric 50 essentially fills aforesaid space. Dielectric 50 extends back beyond socket ., . - . ~ .. ,~ .~ .. . .
.. ~ .
,: :
: ' ' ' ~ ' 4~9 housing tail portion 46 a substantial distance underneath outer conductor 48, when this is present, so as to underlie a ferrule 60. Dielectric 50 may be in one piece, but normally will consist of more than one piece for greater ease of manufacture and installation. In general, the number of pieces in dielectric 50 is determined by the configuration of the cavity between socket member 30 and socket housing 40. The individual pieces may be formed from the same type of material, or from different mater;als in the defined class of materials.
Herein, dielectric sa is fitted as two pieces 52 and 54 ~Figures 1-la). Piece 52 extends out to socket housing end 44 to insulate electricallynose portion 42 from electrical pin 92, when pin 92 and socket 32 are mated.
Dielectric piece 54 extends roughly from the outer end 61 of ferrule 60, at the approximate level of the outer surface of tail portion 46, underneath ferrule 60, end portion 48 of braid 22, tail portion 46 and for-ward until it abuts rear end 35 of socket barrel 34 at flat end 56. Herein, a shoulder 55 of piece 54 abuts against end 47 of barrel 46, which shoulder 55 restrains piece 54 from movement toward socket barrel 34. Piece 54 is provided with another shoulder 57 against which the inner end of cable inner dielectric 62 can abut in forward axial movement thereof. Ends 56, 57 and the dielectric therebet~een bar the inner dielectric 62 from further move-ment toward the inner pin-socket contact zone and thereby minimize electrical disturbances caused by cable inner dielectric movement.
Socket assembly 10 includes a conductive ferrule crimp means 60.
~errule 60 encircles: socket housing barrel (tail) portion 46, socket assembly dielectric material 54, end portion 48 of outer conductor 22, cable inner dielectric 62, and that portion of cable inner conductor roughly under ferrule 60. Ferrule 60 is of metal capable of being crimped to fasten togeth-er ~1~ the ferrule, the encircled tail portion, and outer conductor; and (2) :
~:
4~49 the ferrule, outer conductor, and dielectric 54 extending beyond the tail portion. The crimp (2~ restrains the inner pin-socket contact against rearward pull of inner dielectric and inner conductor.
An end portion of a second coaxial cable 74 ;s shown in Figure lb.
Cable 74 is made of inner conductor 76, inner dielectric material 78, and a double braid outer conductor 80 and 82. The protective jacket is outside the figure.
Pin assembly 70 as set forth in Figures la-lb comprises an electric-al pin member 90 having a pin 92 at one end, away from cable 74, and a barrel 94 at the other end for receiving a portion 96 of the inner conductor of cable 74. Pin barrel 94 is sized so that inner conductor portion 96 can be crimped therein, holding inner conductor 96 and improving electrical contact.
An electrically conductive pin housing 100 (Figures la-lb) is co-axially aligned around pin member 90 and has a cylindrical taped nose portion 102 having forward end 103, end 103 being divided into a plurality of spring fingers for improving electrical contact with socket nose portion 42. Pin housing 100 has at its other end a cylindrical barrel (tail) portion 106, for insertion underneath an end portion 108 of outer conductor braid 80 and to make electrical contact therewith.
Dielectric material 110 (Figures la-lb) is positioned in pin assembly 70 between pin member 90 and pin housing 100 to insulate electrically these from each other, and also pin housing 100 from inner conductor 112 ~Figure lb). Dielectric 110 essentially fills aforesaid space. Dielectric 110 extends back beyond pin housing barrel (tail) portion 106 a substantial distance underneath outer conductor 80, when this is present, so as to under-lie a ferrule 130.
Herein, dielectric 110 is fitted as three pieces 114, 116 and 118 (Figures la-lb~. Piece 114 goes forward to squared end 120 to insulate pin _7_ :
, . . ' ' ~243'~9 92 from nose end 44 when the pin and socket are mated.
Dielectric piece 118 extends roughly from the outer end 131 of ferrule 130, at the approximate level of the outer surface of tail portion 106~ underneath ferrule 130, end portion of braid 82~ tail portion la6, and forward until it abuts the rear end 117 of dielectric piece 116. Piece 118 is provided with a shoulder 119 aga;nst which the inner end of cable dielectric 132 abuts in forward axial movement and is barred from further movement toward the inner pin-socket contact zone, thereby minimizing electrical disturbance caused by cable dielectric axial movement. Shoulder 120 abutted against end 107 of tail portion 106 helps restrain forward movement o dielectric material 110.
Dielectric 116 runs into dielectric 114, described earlier.
Because of the characteristics of dielectric materials 50 and 110 there is no thermal elongation to force pin 92 and socket 32. Thus inner pin-socket contact is further captivated against axial movement.
Pin assembly 70 includes a conductive ferrule crimp means 130.
Ferrule 130 encircles: p;n housing barrel (tail) portion 106, pin assembly dielectric material 1-18, end portion 108 of outer conductor 80, cable inner dielectric 132, and that portion of cable inner conductor roughly under ferrule 130. Ferrule 130 is of metal capable of being crimped to fasten together (1) the ferrule, outer conductor and the encircled tail portion;
and ~2) the ferrule, outer conductorJ and dielectric 118 extending beyond the tail portion. The crimp (2) restrains the inner pin-socket contact against rearward pull of inner dielectric and inner conductor.
Pin assembly 70 is prGvided with ~Figure la~ a stainless steel protective sleeve, cylindrical, 140, positioned on the exterior of pin housing 100 to protect the spring fingers at the forward end 103 of pin housing nose ~ortion 102.
,' I~LUSTRATI~N: A suitable coaxial cable for termination by the contact assembly of the ;nvention is RG 142/U in size 12 contact in conjunct-ion with a multipin electrical connector. This cable has a solid copper inner conductor; a PTFE dielectric (polytetrafluoroethylene); a braided copper outer conductor; and a FEP protective jacket (fluorinated ethylene propylene).
In the contact assembly, the pin and socket members, the p;n and socket housings, and the cylinder with spring fingers are made from heat treated beryllium copper alloy. The ferrules are soft berylliumcopper alloy. The dielectric material is polyamide.
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, ., ' ' '- ' ' ' ~` ' ~ '' .
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A coaxial contact assembly for captivating inner pin-socket elect-rical contacts, which contact assembly comprises: a pin housing and a sock-et housing for overlapped electrically conductive joinder; pin member and socket member located with said corresponding housings, for electrical mat-ing; said pin member and said socket housing having abutting, non-conductive relation when in the mated condition; said pin member and said socket member each having a barrel for receiving a coaxial cable inner conductor to be terminated within said contact assembly; said pin housing and said socket housing each having a barrel portion over which an outer conductor end port-ion of corresponding coaxials can be positioned; dielectric material within each of said pin housing and said socket housing to insulate the respective housing from its corresponding pin or socket member, said dielectric mater-ial extending beyond the corresponding barrel, beneath the corresponding outer conductor end portion, and forward to provide abutments at the barrel end of said socket member against forward axial movement of a cable inner dielectric and backward movement of said inner pin-socket contact, and to provide abutment for the inner dielectric of a second cable and to provide dielectric surface at said pin member for aforesaid abutting socket housing-pin member relation; and ferrule crimp means encircling corresponding:
housing barrel, extended dielectric material, cable inner dielectric and cable inner conductor, whereby, when said cables are in position in the contact assembly, crimping said ferrules substantially captivates the inner pin-socket contacts against axial movement; and where said housing dielect-rics are substantially rigid, insulating materials with high resistance to cold flow.
housing barrel, extended dielectric material, cable inner dielectric and cable inner conductor, whereby, when said cables are in position in the contact assembly, crimping said ferrules substantially captivates the inner pin-socket contacts against axial movement; and where said housing dielect-rics are substantially rigid, insulating materials with high resistance to cold flow.
2. The contact assembly of claim 1 wherein a protective cylindrical member is affixed to said pin housing to protect a plurality of spring fingers terminating the forward end of said pin housing.
3. A coaxial contact assembly for captivating inner pin-socket electrical contacts, which contact assembly comprises: an electrical pin assembly; an electrical socket assembly for mating with said pin assembly;
where said socket assembly comprises, an electrical socket member having a pin receiving socket at one end and a barrel at the other end for re-ceiving a portion of the inner conductor of a coaxial cable; an electrically conductive socket housing coaxially aligned around said socket member, hav-ing a cylindrical nose portion extending beyond the entry to said socket and a cylindrical barrel portion for insertion underneath, and for making electrical contact with, an end portion of the outer conductor of a coaxial cable; socket assembly dielectric material positioned between said socket member and said socket housing for electrically insulating said socket member from said socket housing and said outer conductor of a coaxial cable, and extending back beyond said socket housing barrel portion and forward to abut the rear end of said socket barrel and to bar forward movement of co-axial cable dielectric; and conductive ferrule crimp means encircling: said socket housing barrel portion, said backward extending socket assembly dielectric material, said end portion of outer conductor of coaxial cable, and inner conductor and dielectric material associated with the end portion of the outer conductor of coaxial cable; and said ferrule is capable of being crimped to fasten the ferrule, the encircled barrel portion and outer conductor; and the ferrule, outer conductor and extending dielectric mater-ial, to captivate inner pin-socket contacts from axial movement owing to axial pull of coaxial cable dielectric material and inner conductor; where said pin assembly comprises, an electrical pin member having a pin, for entering said socket, at one end and a barrel at the other end for re-ceiving an end portion of the inner conductor of a second coaxial cable;
an electrically conductive pin housing coaxially aligned around said pin member, having a cylindrical nose portion for overlapping electrical con-tact with said socket housing nose portion, and a cylindrical barrel portion for insertion underneath, and for making electrical contact with, an end portion of the outer conductor of a second coaxial cable; pin assembly dielectric material positioned between said pin member and said pin housing for electrically insulating said pin member from said socket housing when said pin and said socket are mated, and for electrically insulating said pin member from said pin housing and said outer conductor of second coaxial cable, said pin assembly dielectric material extending back beyond said pin housing barrel portion and forward to provide an abutment for the inner end of second cable dielectric and at said pin member provides insulator contact with said socket housing and pin-socket captivation; and conductive ferrule crimp means encircling: said pin housing barrel portion, said backward extending pin assembly dielectric material, said end portion of the outer conductor of second coaxial cable, and inner conductor and dielectric mater-ial associated with the end portion of outer conductor of second coaxial cable; and said ferrule is capable of being crimped to fasten together the ferrule, the encircled pin housing barrel portion, outer conductor and the ferrule, outer conductor and pin assembly dielectric material, to captivate inner pin-socket contacts from axial movement owing to axial pull of second coaxial cable dielectric material and inner conductor; and said pin assembly includes a protective cylindrical member, positioned on the exterior surface of said pin housing, to protect a plurality of spring fingers terminating the forward end of said pin housing; and where said pin assembly and said socket assembly dielectric materials are substantially rigid, insulating materials with high resistance to cold flow.
where said socket assembly comprises, an electrical socket member having a pin receiving socket at one end and a barrel at the other end for re-ceiving a portion of the inner conductor of a coaxial cable; an electrically conductive socket housing coaxially aligned around said socket member, hav-ing a cylindrical nose portion extending beyond the entry to said socket and a cylindrical barrel portion for insertion underneath, and for making electrical contact with, an end portion of the outer conductor of a coaxial cable; socket assembly dielectric material positioned between said socket member and said socket housing for electrically insulating said socket member from said socket housing and said outer conductor of a coaxial cable, and extending back beyond said socket housing barrel portion and forward to abut the rear end of said socket barrel and to bar forward movement of co-axial cable dielectric; and conductive ferrule crimp means encircling: said socket housing barrel portion, said backward extending socket assembly dielectric material, said end portion of outer conductor of coaxial cable, and inner conductor and dielectric material associated with the end portion of the outer conductor of coaxial cable; and said ferrule is capable of being crimped to fasten the ferrule, the encircled barrel portion and outer conductor; and the ferrule, outer conductor and extending dielectric mater-ial, to captivate inner pin-socket contacts from axial movement owing to axial pull of coaxial cable dielectric material and inner conductor; where said pin assembly comprises, an electrical pin member having a pin, for entering said socket, at one end and a barrel at the other end for re-ceiving an end portion of the inner conductor of a second coaxial cable;
an electrically conductive pin housing coaxially aligned around said pin member, having a cylindrical nose portion for overlapping electrical con-tact with said socket housing nose portion, and a cylindrical barrel portion for insertion underneath, and for making electrical contact with, an end portion of the outer conductor of a second coaxial cable; pin assembly dielectric material positioned between said pin member and said pin housing for electrically insulating said pin member from said socket housing when said pin and said socket are mated, and for electrically insulating said pin member from said pin housing and said outer conductor of second coaxial cable, said pin assembly dielectric material extending back beyond said pin housing barrel portion and forward to provide an abutment for the inner end of second cable dielectric and at said pin member provides insulator contact with said socket housing and pin-socket captivation; and conductive ferrule crimp means encircling: said pin housing barrel portion, said backward extending pin assembly dielectric material, said end portion of the outer conductor of second coaxial cable, and inner conductor and dielectric mater-ial associated with the end portion of outer conductor of second coaxial cable; and said ferrule is capable of being crimped to fasten together the ferrule, the encircled pin housing barrel portion, outer conductor and the ferrule, outer conductor and pin assembly dielectric material, to captivate inner pin-socket contacts from axial movement owing to axial pull of second coaxial cable dielectric material and inner conductor; and said pin assembly includes a protective cylindrical member, positioned on the exterior surface of said pin housing, to protect a plurality of spring fingers terminating the forward end of said pin housing; and where said pin assembly and said socket assembly dielectric materials are substantially rigid, insulating materials with high resistance to cold flow.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US8256679A | 1979-10-09 | 1979-10-09 | |
| US082,566 | 1993-06-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1124349A true CA1124349A (en) | 1982-05-25 |
Family
ID=22171988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA355,550A Expired CA1124349A (en) | 1979-10-09 | 1980-07-07 | Coaxial contact assembly for captivating inner pin-socket electrical contacts |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0027680A1 (en) |
| JP (1) | JPS5661774A (en) |
| AU (1) | AU5896980A (en) |
| CA (1) | CA1124349A (en) |
| NO (1) | NO801508L (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5207596A (en) * | 1992-03-19 | 1993-05-04 | Tandy Corporation | Solderless coaxial wire connector and method for attachment |
| US5480325A (en) * | 1994-05-27 | 1996-01-02 | Tandy Corporation | Coaxial connector plug and method for assembly |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4486726A (en) * | 1982-10-07 | 1984-12-04 | Uti Corporation | Joint between coaxial cable and microwave component |
| US4728301A (en) * | 1987-05-14 | 1988-03-01 | Amphenol Corporation | Pin/socket, pin/pin triaxial interface contact assembly |
| JP2009054357A (en) * | 2007-08-24 | 2009-03-12 | Auto Network Gijutsu Kenkyusho:Kk | Terminal connection structure of shielded wire and shielded wire with terminal, and manufacturing method of shielded wire with terminal |
| EP2438655A1 (en) * | 2009-06-05 | 2012-04-11 | Andrew LLC | Slip ring contact coaxial connector |
| US10128611B2 (en) * | 2016-08-01 | 2018-11-13 | Te Connectivity Corporation | Ferrule assembly for an electrical connector |
| JP7379085B2 (en) | 2019-10-25 | 2023-11-14 | タイコエレクトロニクスジャパン合同会社 | Crimp structure |
| JP2022153116A (en) * | 2021-03-29 | 2022-10-12 | ミツミ電機株式会社 | Electric connector |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4524663Y1 (en) * | 1970-02-25 | 1970-09-28 | ||
| DD113136A1 (en) * | 1974-03-26 | 1975-05-12 | ||
| DE2440464A1 (en) * | 1974-08-23 | 1976-03-04 | Huber & Suhner Ag | Coaxial cable connector with split inner pin - two-part insulating sleeve encloses pin and engages neck portion of pin |
| US4165911A (en) * | 1977-10-25 | 1979-08-28 | Amp Incorporated | Rotating collar lock connector for a coaxial cable |
-
1980
- 1980-05-21 NO NO801508A patent/NO801508L/en unknown
- 1980-06-02 AU AU58969/80A patent/AU5896980A/en not_active Abandoned
- 1980-06-24 JP JP8582580A patent/JPS5661774A/en active Pending
- 1980-07-02 EP EP80302242A patent/EP0027680A1/en not_active Withdrawn
- 1980-07-07 CA CA355,550A patent/CA1124349A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5207596A (en) * | 1992-03-19 | 1993-05-04 | Tandy Corporation | Solderless coaxial wire connector and method for attachment |
| US5480325A (en) * | 1994-05-27 | 1996-01-02 | Tandy Corporation | Coaxial connector plug and method for assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| NO801508L (en) | 1981-04-10 |
| AU5896980A (en) | 1981-04-16 |
| EP0027680A1 (en) | 1981-04-29 |
| JPS5661774A (en) | 1981-05-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |