CA1113163A - Solderless termination system - Google Patents
Solderless termination systemInfo
- Publication number
- CA1113163A CA1113163A CA214,478A CA214478A CA1113163A CA 1113163 A CA1113163 A CA 1113163A CA 214478 A CA214478 A CA 214478A CA 1113163 A CA1113163 A CA 1113163A
- Authority
- CA
- Canada
- Prior art keywords
- jaws
- wire
- sides
- termination system
- jaw
- 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
- 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
- H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
- H01R4/2416—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type
- H01R4/2445—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives
- H01R4/2466—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives the contact members having a channel-shaped part, the opposite sidewalls of which comprise insulation-cutting means
Abstract
ABSTRACT OF THE DISCLOSURE
This invention relates to a solderless termination system, where a wire is engaged and held by blades or jaws. Prior art termination of this type are physically weak and exhibit undesirable change in contact resistance between the terminated wire and the terminating system after being subject to time and hostile environments. This invention overcomes such deficiencies of the prior art by providing an electrical termination system in which the wire receiving portion is defined by spaced apart sides for receiving a wire between them and at least one pair of formed-in jaws in the sides. The jaws are formed opposite each other presenting a narrowed space between them. The formed-in jaws are integral with the sides of each of their lateral extremities. In a further aspect, a lead-in portion is provided by notching the sides at the jaws establishing an angle to the upper edge of the jaws to aid in locating the wire and direct-ing it into the jaws. In the area which contacts the wire, the lead-in edge desirably has a transition portion which comprises a coined edge in order to present to an entering wire a smoothly angled embossing surface.
In addition, the jaws may be freed at their lower ends.
This invention relates to a solderless termination system, where a wire is engaged and held by blades or jaws. Prior art termination of this type are physically weak and exhibit undesirable change in contact resistance between the terminated wire and the terminating system after being subject to time and hostile environments. This invention overcomes such deficiencies of the prior art by providing an electrical termination system in which the wire receiving portion is defined by spaced apart sides for receiving a wire between them and at least one pair of formed-in jaws in the sides. The jaws are formed opposite each other presenting a narrowed space between them. The formed-in jaws are integral with the sides of each of their lateral extremities. In a further aspect, a lead-in portion is provided by notching the sides at the jaws establishing an angle to the upper edge of the jaws to aid in locating the wire and direct-ing it into the jaws. In the area which contacts the wire, the lead-in edge desirably has a transition portion which comprises a coined edge in order to present to an entering wire a smoothly angled embossing surface.
In addition, the jaws may be freed at their lower ends.
Description
~L~L13163 Thls inventlon relates to a solderles~ termlna-tion system. In partlcular, lt relates to the type o~ such systems where a wlre ls engaged and held by blades or ~aws.
In further particularJ lt relateæ tothe type o~ such æy~tems adapted for insulatlon pierclng as well as engaging and holding a wire.
Electrlcal termlnation systems are known ln myriad forms and slzes. The type o~ system of intere~t in the present desoriptlon provldes, as a means for retalning a wlre, a pair of ~aclng blades or Jaws whlch may be, be~ore insertlon of a wlre, ln contact or approprlately spaced apart. Conventionally, blades are adapted to grip a wire between them for mechanical and electrlcal contact. Often, a lead-ln portion is provided where the contact portlon of the blades opens to provlde convenient positioning and gradual gripping o~ the wlre. Such structures as are ~hown in the prior art may also enable the inæulatlon ~urround-ing the wlre to be plerced as lt ls lnserted between the blades. Common appllcation~ of such termlnatlon systems are in spllcing wlres and in the wire termlnatlng end of connectors.
mere are a number o~ factors and problems lmportant in an aaceptable insulatlon plerclng solderless termlnation system. Some of these factoræ and problems are more pronounced wlth regard to so-called minlature terminatlon systems or high den~lty ~ystems where elements are quite close together.
- One of the mo~t lmportant (1~ not the most lmportant) performance ~a¢tors relates to contact resis-30 tance. More accurately, thls factor relates to the changein contact resistance between the termlnated wire and the terminating system a~ter belng sub~ect to tlme and hostlle envlronments.
i63 The physlcal strength and durabllity o~ the con-nectlon between the wire and the terminatlon system is al30 important.
Other ~actors relate to manufacturablllty and withln that general sub~ect, to the level o~ confldence ~ound for terminations passing the various acceptance tests. It should be understood that with hlgh volume productlon, the number o~ faulty pieces should be small and predlctable with a high level of con~idence.
The termlnation system descrlbed below has been ~ound to perform very well under a variety of physical and electrical performance conditions and to meet the needs ~or manu~acturablllty. In terms of change in contact re-slstancel under hostile environments and use tests, excel~
lent results have been obtained.
It is further notable that termination systems of the type hereln descrlbed have both civilian and mili-tary w es and are particularly used in telephone ~ystems.
Productlon and utilization volumes are high and rella-blllty requirements withln the per~ormance parametersspecl~led by users are very strlngent. In one exemplary applicatlon, the crlterlon set is that, under the de~lned test conditlons, no more than 1 out of 10,000 termlnations may exceed a change in contact resistance of .25 mllllohms at the 95~ confldence level.
The invention comprlses an electrlcal terminatlon sy~tem in which the wire recelving portlon is de~ined by spaced apart sldes for receiving a wlre between them and at least one palr of ~ormed-in ~aws in the sides. The 30 ~aws are formed opposlte each other presenting a narrowed~
space between them. The formed-in Jaws are lntegral with the ~ldes at each o~ their lateral extremitles. In a ~urther aspect, a lead-in portion is prov$ded by notching :
.~
the sides at the jaws establishing an angle to the upper edge of the jaws to aid in locating the wire and directing it into the jaws. In the area which contacts the wire, the lead-in edge desirably has a transition portion which comprises a coined edge in order to present to an entering wire a smoothly angled embossing surface. In addition, the jaws may be freed at their lower ends.
Figure 1 is a perspective view of a preferred embodiment of the termination system of the invention.
Figure 2 is a perspective view of another preferred embodiment of the termination system of the inven-tion as embodied in a ribbon type contact element.
Figure 3 is a perspective view of the contact element of Figure 2 installed in a high aensity connector body.
Figure 4 is a partial top view of the preferred embodiment of the invention.
Figure 5 is an enlarged partial sectional end view -of the preferred embodiment of the invention through V-V
of Figure 4.
Figure 6 is a sectional end view through VI-VI
of Figure 4 of the termination system with a wire installed, and illustrating in phantom the wire prior to installation.
Figure 7 shows a top view of the invention employed for splicing parallel wires.
Figure 8 shows a top view of the invention employed for butt splicing.
Fig. 9 is a reproduction of a photomicrograph of a longitudinal cross-section of 24 gauge wire inserted in the - 30 termination system. The insulation is not shown.
Fig. 10 is a reproduction of a photomicrograph of a right-angle cross-section of 24 gauge wire inser~ed in the termination system. The insulation is not shown.
13~63 In the drawings, ln Figure l, the termlnation system ~s lllustrated without reference to any speclflc application. In Figures 7 and 8 the terminatlon system is schematically illustrated as employed as a splicing means for parallel wires and buttlng wires, respectively.
In Figures 2 and 3, the system is illustrated as employed as a termination or wire receivlng end of a ribbon type contact element l. Figure 3 shows how such a contact element may be used in a high density connector system.
By thls, it should be evldent that the inventlon has wide utili~y as a terminating system. However, lt is emphasized that the greatest advantages are seen when lt is used in a miniaturized appllcation where there is re-quired strength, reliability and manufacturabillty of very small parts made ~rom otherwise relatively weak materlals.
Referring to Figure l, the termlnatlon system illustrated has spaced apart generally parallel sides 2 and a bottom 3 forming an elongated wire receiving channel.
Pairs of opposltely facing formed-in ~aws 4, 4a are formed-20 in and lntegral with ~ach of the sides 2. T~o pairs of~aw~ 4, 4a are shown although one pair or more than two palr could be used. By formed-in, it is meant that the metal of the sides is not cut or otherwlse interrupted but is, rather, stretched and/or bent and ~ormed into the continuous curved ~aws attached to and lntegral with the sides 2 at each of lts lateral extremities. Thus, the ~aws 4, 4a present laterally smoothly curved opposing formations havlng working faces 5, 5a as shown.
In order to best explain the lead-in portion 6, 6a of the termlnatlng system, it is helpful to describe some of the steps in maklng the system. Basically, lt is punched, bent and fo~med from flat sheets. The lead-ln 6, 6a ls preferably made by punching a V-shaped notch prior to the forming-in of the jaws (and also before bending up the sides) so that after the jaw is formed, the upper edge 7, 7a of the sides extends angularly downward and inward following the plan of the jaw and as best seen in Figures 4, 5 and 6.
As shown in Figure 1, slots 8, 8a are formed in the sides 2 in order to free the lower end of the jaws 4, 4a from the sides. As shown in Figures 2, 4 and 5 the slot ~j 8a is a piece of the sheet removed at the bend in ~
the ch~*~ between the sides 2, 2a and the bottom 3. With the partlc~u~ar embodiment shown here involving a 90 bend and the ~tom 3 being very close to the lower end of the jaws, it ~ very important to free the lower end of the jaws in order to prevent excessive stretching and random formations of the metal. It may be possible, where more free area is available below the jaw, to omit freeing it, although the freeing is still preferred.
Referring to Figure 5, in order to facilitate such a smooth distortion, the lead-in portion has a transition area 9, 9a to change the angle of the edge to present an angled embossing surface ~- -to the wire at the upper edge of the jaw in the working area. It may be formed by a coining operation in the formation of the piece where the edge 7, 7a has its angle changed to follow the shape of the lead-in portion 6, 6a as seen in Figure 5. This transition area 9, 9a is so designated because it is an area of transition from con- -tact, by a wire being insert~d, with the upper edge 7, 7a of the jaw to contact with its working face 5, 5a. Thus, the transition area is formed at the innermost area of the jaw defined by the working face 5, 5a of the jaw. The IA
, ~3163 transitlon area, presenting an angled embosslng surface, tends to cause compresslve ~orces on the wlre, aiding ln the desirable relatively smooth dlstortlon of the wlre when lt ls eventually fully inserted. Without the transi-tion area~ a sharp corner at the upper edge of the ~aw over the working faces 5, 5a would be presented to a wire which would tend to shear and sharply shape the wlre.
The lead-in area 6, 6a includlng the coined transltion portion is preferably at about a 45 angle to horizontal. It may be pre~erable to make the transition area present an even steeper angle to a-wlre between the upper edge and the worklng face of the ~aw in order to enhance lts transition effect. Other methods may be employed to ~orm the ~ransitlon area 9, 9a such as by ~j forming the V notch of the lead-ln area with an angled - edge lnstead of a square cut edge. It ls lntended to de-~lne the transition area there~or as e~fecting a smooth continuation of the upper edge and into transltlon to the working face of the ~aw.
It is for many applications lmportant to provlde some strain relief in combinatlon with thls termination system. A strain relief means sultable with the present termination system shown at 13 ln Figure 2 and 3.
In the preferred commercial embodiment, such as illustrated ln Flgures 2 and 3 ~or a rlbbon type contact element, the contact element may be formed from o.oo6 inch cadmlum bronze sheet. The contact will usually be gold plated either in its entirety or selectively on the mating portion, or both fully and selectively plated. In a primary use in telephone systems employing 24 gauge and/or 26 gauge solld lnsulated wlre, the space between the ~aws can be about .007 inch.
The tab 14 is provided to hold the contact element ~: :
~3~G3 in place in the insulating connector body. A similar tab 15 is formed up in the butt splicing embodiment of Figure 8 to hold the part in place in an associated body member.
Figure 3 shows part of a 50 contact polarized r~bbon type connector. This is a type of high density connector commonly used in rack-and-panel and cable-to-cable applications in telephone systems. In an exemplary case, the contact elements are on .085 inch centers. The contact elements 1 are mounted in two parallel rows in the insulator 10 between the ribs 11. The contact elements 1 reside in channels defined, at the wire termination end, by ribs 11. The ribs 11 provide support for the sides 2, -~
2a of the termination systems, serving to rigidly back the sides 2 in order to prevent their spreading apart when a wire is inserted.
To use the connector, the completed connector is - - -held fimrly and wires inserted either singly or multiply, one into each contact element.
The wire 12 is positioned as shown in Figure 6 over the channel and, with a tool designed to do so, evenly pushed down into the channeI.
As can be appreciated, the smoothly angled con-figuration of the upper edge 7, 7a of the jaw will contact the insulation on the wire and, as the wire is pushed downward, will tear through the insulation. As the wire progresses downward and the metal of the wire itself con-tacts the jaws past the transition area 9, 9a and to the working faces 5, 5a, it ~ill be deformed to eventually mate intimately with the jaw working faces 5, 5a. The primary distortion of the wire is an inwardcompression or embossing with some upward displacement of metal.
..~
3 ~3;1~;3 In an intensive series of tests involving a variety of hostile environments, thermal cycling, thermal shock, thermal aging and physical strength and durability the termination system performed well according to cri-teria relevant to telecommunications applications.
While the above description relates to certain embodiments now known to and preferred by the inventors, it is possible for persons skilled in the art to make certain additions, changes and modifications. It is in-tended by the appended claims to cover such additions,changes and modifications as fall within the scope and spLrit of the inventlon.
:
.'. ' .
t~ .
In further particularJ lt relateæ tothe type o~ such æy~tems adapted for insulatlon pierclng as well as engaging and holding a wire.
Electrlcal termlnation systems are known ln myriad forms and slzes. The type o~ system of intere~t in the present desoriptlon provldes, as a means for retalning a wlre, a pair of ~aclng blades or Jaws whlch may be, be~ore insertlon of a wlre, ln contact or approprlately spaced apart. Conventionally, blades are adapted to grip a wire between them for mechanical and electrlcal contact. Often, a lead-ln portion is provided where the contact portlon of the blades opens to provlde convenient positioning and gradual gripping o~ the wlre. Such structures as are ~hown in the prior art may also enable the inæulatlon ~urround-ing the wlre to be plerced as lt ls lnserted between the blades. Common appllcation~ of such termlnatlon systems are in spllcing wlres and in the wire termlnatlng end of connectors.
mere are a number o~ factors and problems lmportant in an aaceptable insulatlon plerclng solderless termlnation system. Some of these factoræ and problems are more pronounced wlth regard to so-called minlature terminatlon systems or high den~lty ~ystems where elements are quite close together.
- One of the mo~t lmportant (1~ not the most lmportant) performance ~a¢tors relates to contact resis-30 tance. More accurately, thls factor relates to the changein contact resistance between the termlnated wire and the terminating system a~ter belng sub~ect to tlme and hostlle envlronments.
i63 The physlcal strength and durabllity o~ the con-nectlon between the wire and the terminatlon system is al30 important.
Other ~actors relate to manufacturablllty and withln that general sub~ect, to the level o~ confldence ~ound for terminations passing the various acceptance tests. It should be understood that with hlgh volume productlon, the number o~ faulty pieces should be small and predlctable with a high level of con~idence.
The termlnation system descrlbed below has been ~ound to perform very well under a variety of physical and electrical performance conditions and to meet the needs ~or manu~acturablllty. In terms of change in contact re-slstancel under hostile environments and use tests, excel~
lent results have been obtained.
It is further notable that termination systems of the type hereln descrlbed have both civilian and mili-tary w es and are particularly used in telephone ~ystems.
Productlon and utilization volumes are high and rella-blllty requirements withln the per~ormance parametersspecl~led by users are very strlngent. In one exemplary applicatlon, the crlterlon set is that, under the de~lned test conditlons, no more than 1 out of 10,000 termlnations may exceed a change in contact resistance of .25 mllllohms at the 95~ confldence level.
The invention comprlses an electrlcal terminatlon sy~tem in which the wire recelving portlon is de~ined by spaced apart sldes for receiving a wlre between them and at least one palr of ~ormed-in ~aws in the sides. The 30 ~aws are formed opposlte each other presenting a narrowed~
space between them. The formed-in Jaws are lntegral with the ~ldes at each o~ their lateral extremitles. In a ~urther aspect, a lead-in portion is prov$ded by notching :
.~
the sides at the jaws establishing an angle to the upper edge of the jaws to aid in locating the wire and directing it into the jaws. In the area which contacts the wire, the lead-in edge desirably has a transition portion which comprises a coined edge in order to present to an entering wire a smoothly angled embossing surface. In addition, the jaws may be freed at their lower ends.
Figure 1 is a perspective view of a preferred embodiment of the termination system of the invention.
Figure 2 is a perspective view of another preferred embodiment of the termination system of the inven-tion as embodied in a ribbon type contact element.
Figure 3 is a perspective view of the contact element of Figure 2 installed in a high aensity connector body.
Figure 4 is a partial top view of the preferred embodiment of the invention.
Figure 5 is an enlarged partial sectional end view -of the preferred embodiment of the invention through V-V
of Figure 4.
Figure 6 is a sectional end view through VI-VI
of Figure 4 of the termination system with a wire installed, and illustrating in phantom the wire prior to installation.
Figure 7 shows a top view of the invention employed for splicing parallel wires.
Figure 8 shows a top view of the invention employed for butt splicing.
Fig. 9 is a reproduction of a photomicrograph of a longitudinal cross-section of 24 gauge wire inserted in the - 30 termination system. The insulation is not shown.
Fig. 10 is a reproduction of a photomicrograph of a right-angle cross-section of 24 gauge wire inser~ed in the termination system. The insulation is not shown.
13~63 In the drawings, ln Figure l, the termlnation system ~s lllustrated without reference to any speclflc application. In Figures 7 and 8 the terminatlon system is schematically illustrated as employed as a splicing means for parallel wires and buttlng wires, respectively.
In Figures 2 and 3, the system is illustrated as employed as a termination or wire receivlng end of a ribbon type contact element l. Figure 3 shows how such a contact element may be used in a high density connector system.
By thls, it should be evldent that the inventlon has wide utili~y as a terminating system. However, lt is emphasized that the greatest advantages are seen when lt is used in a miniaturized appllcation where there is re-quired strength, reliability and manufacturabillty of very small parts made ~rom otherwise relatively weak materlals.
Referring to Figure l, the termlnatlon system illustrated has spaced apart generally parallel sides 2 and a bottom 3 forming an elongated wire receiving channel.
Pairs of opposltely facing formed-in ~aws 4, 4a are formed-20 in and lntegral with ~ach of the sides 2. T~o pairs of~aw~ 4, 4a are shown although one pair or more than two palr could be used. By formed-in, it is meant that the metal of the sides is not cut or otherwlse interrupted but is, rather, stretched and/or bent and ~ormed into the continuous curved ~aws attached to and lntegral with the sides 2 at each of lts lateral extremities. Thus, the ~aws 4, 4a present laterally smoothly curved opposing formations havlng working faces 5, 5a as shown.
In order to best explain the lead-in portion 6, 6a of the termlnatlng system, it is helpful to describe some of the steps in maklng the system. Basically, lt is punched, bent and fo~med from flat sheets. The lead-ln 6, 6a ls preferably made by punching a V-shaped notch prior to the forming-in of the jaws (and also before bending up the sides) so that after the jaw is formed, the upper edge 7, 7a of the sides extends angularly downward and inward following the plan of the jaw and as best seen in Figures 4, 5 and 6.
As shown in Figure 1, slots 8, 8a are formed in the sides 2 in order to free the lower end of the jaws 4, 4a from the sides. As shown in Figures 2, 4 and 5 the slot ~j 8a is a piece of the sheet removed at the bend in ~
the ch~*~ between the sides 2, 2a and the bottom 3. With the partlc~u~ar embodiment shown here involving a 90 bend and the ~tom 3 being very close to the lower end of the jaws, it ~ very important to free the lower end of the jaws in order to prevent excessive stretching and random formations of the metal. It may be possible, where more free area is available below the jaw, to omit freeing it, although the freeing is still preferred.
Referring to Figure 5, in order to facilitate such a smooth distortion, the lead-in portion has a transition area 9, 9a to change the angle of the edge to present an angled embossing surface ~- -to the wire at the upper edge of the jaw in the working area. It may be formed by a coining operation in the formation of the piece where the edge 7, 7a has its angle changed to follow the shape of the lead-in portion 6, 6a as seen in Figure 5. This transition area 9, 9a is so designated because it is an area of transition from con- -tact, by a wire being insert~d, with the upper edge 7, 7a of the jaw to contact with its working face 5, 5a. Thus, the transition area is formed at the innermost area of the jaw defined by the working face 5, 5a of the jaw. The IA
, ~3163 transitlon area, presenting an angled embosslng surface, tends to cause compresslve ~orces on the wlre, aiding ln the desirable relatively smooth dlstortlon of the wlre when lt ls eventually fully inserted. Without the transi-tion area~ a sharp corner at the upper edge of the ~aw over the working faces 5, 5a would be presented to a wire which would tend to shear and sharply shape the wlre.
The lead-in area 6, 6a includlng the coined transltion portion is preferably at about a 45 angle to horizontal. It may be pre~erable to make the transition area present an even steeper angle to a-wlre between the upper edge and the worklng face of the ~aw in order to enhance lts transition effect. Other methods may be employed to ~orm the ~ransitlon area 9, 9a such as by ~j forming the V notch of the lead-ln area with an angled - edge lnstead of a square cut edge. It ls lntended to de-~lne the transition area there~or as e~fecting a smooth continuation of the upper edge and into transltlon to the working face of the ~aw.
It is for many applications lmportant to provlde some strain relief in combinatlon with thls termination system. A strain relief means sultable with the present termination system shown at 13 ln Figure 2 and 3.
In the preferred commercial embodiment, such as illustrated ln Flgures 2 and 3 ~or a rlbbon type contact element, the contact element may be formed from o.oo6 inch cadmlum bronze sheet. The contact will usually be gold plated either in its entirety or selectively on the mating portion, or both fully and selectively plated. In a primary use in telephone systems employing 24 gauge and/or 26 gauge solld lnsulated wlre, the space between the ~aws can be about .007 inch.
The tab 14 is provided to hold the contact element ~: :
~3~G3 in place in the insulating connector body. A similar tab 15 is formed up in the butt splicing embodiment of Figure 8 to hold the part in place in an associated body member.
Figure 3 shows part of a 50 contact polarized r~bbon type connector. This is a type of high density connector commonly used in rack-and-panel and cable-to-cable applications in telephone systems. In an exemplary case, the contact elements are on .085 inch centers. The contact elements 1 are mounted in two parallel rows in the insulator 10 between the ribs 11. The contact elements 1 reside in channels defined, at the wire termination end, by ribs 11. The ribs 11 provide support for the sides 2, -~
2a of the termination systems, serving to rigidly back the sides 2 in order to prevent their spreading apart when a wire is inserted.
To use the connector, the completed connector is - - -held fimrly and wires inserted either singly or multiply, one into each contact element.
The wire 12 is positioned as shown in Figure 6 over the channel and, with a tool designed to do so, evenly pushed down into the channeI.
As can be appreciated, the smoothly angled con-figuration of the upper edge 7, 7a of the jaw will contact the insulation on the wire and, as the wire is pushed downward, will tear through the insulation. As the wire progresses downward and the metal of the wire itself con-tacts the jaws past the transition area 9, 9a and to the working faces 5, 5a, it ~ill be deformed to eventually mate intimately with the jaw working faces 5, 5a. The primary distortion of the wire is an inwardcompression or embossing with some upward displacement of metal.
..~
3 ~3;1~;3 In an intensive series of tests involving a variety of hostile environments, thermal cycling, thermal shock, thermal aging and physical strength and durability the termination system performed well according to cri-teria relevant to telecommunications applications.
While the above description relates to certain embodiments now known to and preferred by the inventors, it is possible for persons skilled in the art to make certain additions, changes and modifications. It is in-tended by the appended claims to cover such additions,changes and modifications as fall within the scope and spLrit of the inventlon.
:
.'. ' .
t~ .
Claims (14)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A termination system for electrically engaging an insulation-covered conductor by compressive deformation thereof comprising: an elongated wire receiving body formed from a sheet of metal into a wire receiving channel defined by a bottom and facing sides;
at least one notch cut along the upper edge of each of said facing sides; at least one pair of wire contacting jaws formed-in from said facing sides by bending, the jaws being oppositely positioned and extending transversely of said sides and into the wire receiving channel to receive and hold a wire inserted in the wire receiving channel, the oppositely positioned jaws being so formed as to be sufficiently rigid to facilitate the compression and sub-stantial deformation of the conductor being inserted and the notches providing a lead-in portion on each jaw wherein the notch edges form upper edges of the jaws and extend from the side inwardly and downwardly into the wire receiving channel.
at least one notch cut along the upper edge of each of said facing sides; at least one pair of wire contacting jaws formed-in from said facing sides by bending, the jaws being oppositely positioned and extending transversely of said sides and into the wire receiving channel to receive and hold a wire inserted in the wire receiving channel, the oppositely positioned jaws being so formed as to be sufficiently rigid to facilitate the compression and sub-stantial deformation of the conductor being inserted and the notches providing a lead-in portion on each jaw wherein the notch edges form upper edges of the jaws and extend from the side inwardly and downwardly into the wire receiving channel.
2. A termination system as claimed in claim 1, wherein the lower extremity of each jaw is freed from the side.
3. A termination system as claimed in claim 2, wherein the lower extremity of each jaw is freed from the side by means of an axially extending slot in the body.
4. A termination system as claimed in claim 3, wherein the lead-in portion on each jaw at its innermost area, has a transition area where the upper edge is at an angle of at least 45°.
5. A termination system as claimed in claim 4, wherein the upper edge of the jaw at the transition area is coined to form the transition area.
6. A termination system as claimed in claim 1 having at least two pairs of jaws.
7. A termination system as claimed in claim 1 further comprising an insulated electrical wire inserted in the wire receiving channel and wherein the space between the formed-in pairs of jaws is less than the dimension of the current carrying portion of the wire prior to insertion and wherein the insulation has been opened by the jaws, thus establishing electrical contact between the wire and the jaws.
8 . A termination system as claimed in claim 1 in combination with a contact portion for contact with a mating contact portion so as to define a contact element.
9 . A contact element as claimed in claim 8 wherein the contact portion is a ribbon type element having been formed from a thin sheet of electrically conductive metal.
10. A plurality of contact elements as claimed in claim 8, mounted in an insulating contact mount, so as to define a high density connector body.
11. A connector body as claimed in claim 10 wherein portions of the insulating mount reside adjacent the sides of the contact elements in order to prevent spreading apart of the sides upon insertion of a wire into the element.
12. A method of making an electrical wire termination system comprising: forming a flat sheet of metal into an elongated wire receiving body having a bottom and facing sides defining a wire receiving channel; notching the sides from their upper edges at areas at which jaws are to be formed; and forming-in by bending at least one pair of wire contacting jaws, the jaws being oppositely positioned and extending transversely of the side and into the wire receiving channel, to receive and hold a wire inserted in the wire receiving channel when the body is formed, the oppositely-positioned jaws being so formed as to be separated by a space sufficiently less than the diameter of the wire being inserted prior to insertion to facilitate the compression and deformation of the wire being inserted, and the notches providing a lead-in portion on each jaw, wherein the notch edges form upper edges of the jaws and extend from the side inwardly and downwardly into the wire receiving channel.
13. The method as claimed in claim 12 further comprising freeing the jaw from the side at its lower extremity by an axially extending cut in the side prior to forming-in the jaw.
14. A device for electrically engaging an elongated electrical conductor contained within an insulating sheath, the device comprising: a contact element formed of a thin conductive foil and defining a channel having a bottom and sides spaced apart by an amount sufficient to accommodate the sheath and conductor loosely, and at least one pair of wire contacting jaws having notches at their upper edges and deformed out of the respective sides and extending into the channel, the edges of said notches forming upper edges of the jaws, the distance between the jaws being such as to emboss and grip the conductor upon forcing the conductor into the space between the jaws: and means rigidly supporting the sides against outward deformation in the regions of the jaws when the conductor is inserted.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US44367874A | 1974-02-19 | 1974-02-19 | |
| US443,678 | 1974-02-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1113163A true CA1113163A (en) | 1981-11-24 |
Family
ID=23761767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA214,478A Expired CA1113163A (en) | 1974-02-19 | 1974-11-22 | Solderless termination system |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS50114592A (en) |
| BE (1) | BE822787A (en) |
| CA (1) | CA1113163A (en) |
| DE (1) | DE2456976A1 (en) |
| DK (1) | DK629074A (en) |
| FR (1) | FR2261632A1 (en) |
| GB (1) | GB1490197A (en) |
| IT (1) | IT1026655B (en) |
| NL (1) | NL7415564A (en) |
| NO (1) | NO744354L (en) |
| SE (1) | SE7414549L (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4373769A (en) * | 1975-08-20 | 1983-02-15 | Allied Corporation | Electrical connector including insulation-opening contact |
| NZ182873A (en) * | 1976-01-02 | 1980-11-28 | Amp Inc | Wire slitting terminal and integral housing for same |
| US4035049A (en) * | 1976-02-10 | 1977-07-12 | Trw Inc. | Universal solderless termination system |
| IL54479A0 (en) * | 1977-04-18 | 1978-07-31 | Bunker Ramo | Electrical connectors |
| FR2413804A1 (en) * | 1977-12-28 | 1979-07-27 | Souriau & Cie | Connector with spring contact fingers at one end - has automatic insulation stripping jaws at other end for gripping inserted wire |
| FR2415374A1 (en) * | 1978-01-23 | 1979-08-17 | Nozick Jacques | Connector electrode with automatic insulation stripper - has U=shaped cross=section formed from cut and pressed single metal strip |
| FR2459581A2 (en) * | 1979-04-10 | 1981-01-09 | Cit Alcatel | Self-stripping wire or cable connector block - has folded metal plate with wire-receiving slits, anchored within U=shaped insulating channel |
| JPS5799648A (en) | 1980-12-13 | 1982-06-21 | Copyer Co Ltd | Electrophotographic receptor |
| US4423129A (en) | 1980-12-17 | 1983-12-27 | Canon Kabushiki Kaisha | Electrophotographic member having layer containing methylidenyl hydrazone compound |
| US4418133A (en) | 1981-03-27 | 1983-11-29 | Canon Kabushiki Kaisha | Disazo photoconductive material and electrophotographic photosensitive member having disazo pigment layer |
| JPS58199353A (en) * | 1982-05-17 | 1983-11-19 | Canon Inc | Electrophotographic receptor |
| JP3276876B2 (en) * | 1997-03-19 | 2002-04-22 | 矢崎総業株式会社 | IDT terminal and method of manufacturing IDT terminal |
| JP3543705B2 (en) | 1999-12-14 | 2004-07-21 | 住友電装株式会社 | ID terminal fitting |
| JP3544172B2 (en) * | 2000-06-29 | 2004-07-21 | 住友電装株式会社 | ID terminal fitting |
| JP2002158045A (en) * | 2000-11-21 | 2002-05-31 | Auto Network Gijutsu Kenkyusho:Kk | Pressure welding blade applicable for very thin wire |
-
1974
- 1974-11-11 GB GB48669/74A patent/GB1490197A/en not_active Expired
- 1974-11-20 SE SE7414549A patent/SE7414549L/xx unknown
- 1974-11-22 CA CA214,478A patent/CA1113163A/en not_active Expired
- 1974-11-29 IT IT30004/74A patent/IT1026655B/en active
- 1974-11-29 NL NL7415564A patent/NL7415564A/en unknown
- 1974-11-29 BE BE151017A patent/BE822787A/en unknown
- 1974-11-29 FR FR7439218A patent/FR2261632A1/fr not_active Withdrawn
- 1974-12-03 JP JP49137840A patent/JPS50114592A/ja active Pending
- 1974-12-03 DE DE19742456976 patent/DE2456976A1/en active Pending
- 1974-12-03 NO NO744354A patent/NO744354L/no unknown
- 1974-12-03 DK DK629074A patent/DK629074A/da not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| FR2261632A1 (en) | 1975-09-12 |
| GB1490197A (en) | 1977-10-26 |
| BE822787A (en) | 1975-03-14 |
| NO744354L (en) | 1975-08-20 |
| IT1026655B (en) | 1978-10-20 |
| JPS50114592A (en) | 1975-09-08 |
| SE7414549L (en) | 1975-08-20 |
| NL7415564A (en) | 1975-08-21 |
| DE2456976A1 (en) | 1975-08-28 |
| DK629074A (en) | 1975-10-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |