CA1072648A - Strain relief adapter for an electrical connector - Google Patents
Strain relief adapter for an electrical connectorInfo
- Publication number
- CA1072648A CA1072648A CA241,252A CA241252A CA1072648A CA 1072648 A CA1072648 A CA 1072648A CA 241252 A CA241252 A CA 241252A CA 1072648 A CA1072648 A CA 1072648A
- Authority
- CA
- Canada
- Prior art keywords
- conductors
- strain relief
- portions
- insulation
- adapter according
- 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
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/502—Bases; Cases composed of different pieces
- H01R13/506—Bases; Cases composed of different pieces assembled by snap action of the parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/56—Means for preventing chafing or fracture of flexible leads at outlet from coupling part
-
- 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
Landscapes
- Coupling Device And Connection With Printed Circuit (AREA)
- Multi-Conductor Connections (AREA)
- Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
- Connector Housings Or Holding Contact Members (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
This invention relates to a strain relief adapter for an elec-trical connector. Strain relief apparatus for an electrical connector which employs a plurality of insertion blades which have a two-fold purpose has been disclosed. Two adapters may be mounted on opposite sides of an elongated electrical connector and a common hood may be slid over the adapters to provide additional positive retention of the adapters.
The present invention provides an improved strain relief which may be installed on the rear portion of an electrical connector which has already had conductors electrically connected to the contacts of the con-nector and which is more suitable than prior adapters for use in connection with termination tools. The present invention provides a pair of one-piece molded structures each of which includes a plurality of pressure members spaced to be received in the respective channels to engage and press against the electrically connected portions of the conductors, conductor clamping means in the form of a comb-shaped edge having a plurality of constructed openings for receiving respective conductors, and a force diversion member extending parallel to, but directed away from, the pressure members and the comb-shaped conductor clamp, also in the form of a comb, to receive the conductors between the teeth thereof for preventing dislocation of the conductors from the insulation-piercing contact portions in response to the application of pulling forces on the conductors.
This invention relates to a strain relief adapter for an elec-trical connector. Strain relief apparatus for an electrical connector which employs a plurality of insertion blades which have a two-fold purpose has been disclosed. Two adapters may be mounted on opposite sides of an elongated electrical connector and a common hood may be slid over the adapters to provide additional positive retention of the adapters.
The present invention provides an improved strain relief which may be installed on the rear portion of an electrical connector which has already had conductors electrically connected to the contacts of the con-nector and which is more suitable than prior adapters for use in connection with termination tools. The present invention provides a pair of one-piece molded structures each of which includes a plurality of pressure members spaced to be received in the respective channels to engage and press against the electrically connected portions of the conductors, conductor clamping means in the form of a comb-shaped edge having a plurality of constructed openings for receiving respective conductors, and a force diversion member extending parallel to, but directed away from, the pressure members and the comb-shaped conductor clamp, also in the form of a comb, to receive the conductors between the teeth thereof for preventing dislocation of the conductors from the insulation-piercing contact portions in response to the application of pulling forces on the conductors.
Description
This invention relates to electrical connector apparatus, and is more particularly concerned with a strain relief adapter ~or an electrical connector.
Strain relief apparatus for an electrical connector which employs a plurality of insertion blades which have a two-fold purpose has been disclosed. First of all, blades are em-ployed as a tool for engaging and forcing insulated conductors into respective insulation-piexcing contact portions of an elec-trical connector. Secondly, the blades are carried on a common member which also supports a comb-shaped member which receives the individual conductors between the teeth of comb to provide strain relief as the structure is snapped about the rear portion of the electrical connector. Two such adapters may be mounted on opposite sides of an elongate electrical connector and a common hood may be slid over the adapters to provide additional positive retention of the adapters.
~ primary object of the invention is to provide an impro-ved strain relief adapter which may be installed on the rear por-tion o~ an electrical connector which has already had conductors electrically connected to the contacts of the connector. Another object of the invention is to provide an improved strain relief adapter which is more suitable than prior adapters for use in connection with termination tools.
Another object of the invention is to provide an impro-ved strain relief adapter constructed o~ two identical one-piece molded structures which may be mounted on opposite sides of an electrical connector and which are inter-engageable with each other to clamp not only to the connector, but to each other.
Another object of the invention is to provide a strain relief adapter which provides strain relie~ on the incoming lead side and on the outgoing lead side of an electrical connector which constitutes a tap in a bundle o~ conductors.
~ 'Y:~
Another object o~ the invention is to provide a strain relief adapter which includes an integral diversion structure ~or preventing dislodgement of the conductors from their electrical contacts in respo~se to tensile ~orces applied on the outgoing ;
leads.
According to the invention, a strain relie~ adapter ~or insulated conductors electrically connected to contact portions supported spaced apart by an electrical device, comprises a plu~
rality of pressure members spaced apart corresponding to the spacing of the contact portions ~or engaging and pressing against first portions of the insulated conductors in the contact area, conductor clamping means spaced from the pressure members for receiving and clamping second portions o~ the ~nsulated conduc-tors along lines parallel to the ~irst portions of the conductors, :`.
and force diversion means spaced ~rom the pressure members and from the-conductor clamping means for receiving the conductors and preventing dislocation o~ the first portions in response to the application of tensilP forces to the conductors.
More specifically, the invention provides a strain re-~o lief adapter for insulated conductors which are pressed into insu-lation-piercing contact portions supported spaced apart in respect-ive channels in parallel rows on opposite sides o~ an electrical connector, the adapter comprising a pair o~ identical inter-enga-geable molded parts for opposite sides of the electrical connector and each of the parts including a plurality o~ blades for enter-ing the respective channels and pressing against the insulation-pierced portions of the conductors3 a comb-shaped edge opposite the blades having constricted openings for receiving the insula-ted conductors to clamp the outgoing lead portions of the conduc-tors, and a comb-shaped member parallel to and extending away from, the blades and the constricted opening comb clamping struc-ture for receiving the individual conductors between the teeth .
- -thereo~ as ~ mealls ~or diverting laterally and upwardly applied forces to pxevent dislocation of the conductors from the insula-tion-piercing contact portions.
The application of pressure to the conductors by the blades provides additional strain relief in that the blades fill the channels straightening any channel barriers which were de-formed during conductor insertion and creating frictional forces against the sides of the barriers as additional protection against loosening of the conductors.
Other objects, features and advantages of the invention, its organization, construction and operation will be best under-stood from the following de-tailed description of a preferred em-bodiment of the invention taken in conjunction with the accompa-nying drawings, on which:
FIG. 1 is a perspective view of an elongate electrical connector which may advantageously be provided with strain relief according to the invent.ion;
FI&. 2 is a fragmentary enlarged view of a part of the rear portion of the electrical connector of FIG. 1 specifically ~O showing a suitable structure for an insulation-piercing contact portion;
FIG. 3 is an elevation of the inner side of a strain relief adapter constructed in accordance with the present inven-tion;
FI&. 4 is a perspective view of a strain relief adap-ter according to the invention, specifically illustrating the outer side and one end of the strain relief adapter;
FI&. 5 is an enlarged fragmentary view of a portion of the elevation of FIG. 3 to more specifically show the structure of the pressure members and the relationship between the pressure mem~
bers and the structure provided for force diversion;
FIG. 6 is a partial fragmentary sectional view taken .- ,.
~ - - ~ .
- .-- . .
substantially alon~ the parting line VI-VX o~ FIG. 5;
FIG. 7 is an end view taken in the direction VII-VII
o~ FIGS. 3 and 4;
FIG. 8 is a sectional view, taken substantially along the line VIII-VIII of FIG. 9 illustrating a pair o~ -the adapters of FIG. 4 mounted on an electrical connector and covered with a hood assembly which provides additional strain relie~;
FIG. 9 is a complementary sectional view taken substan-tially along the parting line I~ of FIG. 8 illustrating an adapted connector ~mounted in one shell o~ the hood assembly, spe-cifisally showing the hood assembly features ~or providing an in~ ~:
coming bundle clamp and outgoing conductor distribution;
FIG. lO is a perspective view of the hood assembly o~
FIGS. 8 and 9 specifically illustrating a latching structure for releasably locking the housing shells together; .
FIG. ll is an elevation of a housing shell with an elec~
trical connector mounted therein, specifically showing the shell adapted for receiving and clamping incoming and outgoing bundles ``:
of conductors;
FI&. 12 is a completed housing assembly, with a connec-tox mounted therein, similar to FIG. ll additionally showing a narrow slot for distributing a portion of the conductors; and FIG. 13 is an elevational view of the apparatus of FIG. 8 as viewed in the direction XIII-XIII.
Referring to FIG. 1, an electrical connector is general-ly illustrated at 10 as comprising a forward portion 12 which, as is well known in the art, is mateable with a complementary connec-tor unit, and a rear portion 14 which carries the contact portions for connection to individual conductors of a bundle or cable. Con-nectors of this type may advantageously be provided with insula-tion-piercing contact portions~ one type of which will be discussed below. . .
. -~3`~P~
The connector 10 also comprises means for mounting the connector to a supporting device or surface, depending on its particular application, and in the particular connector illustra-ted in FIG. 1 a pair of flanges 16 and 18, including respective mounting holes 20 and 22 are illustrated as one type of such mounting means.
The rear portion 14 of the connector 10 is usually mold-ed from a plastic material as a structure which includ0s a plura-lity of spaced vertical ribs 24 defining a plurality of channels 26 therebetween on each side of the connector. The inner portion of each channels 26 includes a cons-tructed opening 28 ~or receiving a conductor and providing a certain amount of strain relief.
The rear portion 14 of the connector 10 includes a pair of recesses 30 and 32 at each end thereof which, as will be under-stood ~rom the description below, aids in locating and aligning the strain relief adapter.
It should be mentioned here that although reference may be made to specific directions and relationships, such as vertical, horizontal, above and below, these directions and relationships arP utilized for clarity only with respect to the particular orien-tation of the apparatus as illustrated on the drawings. It will be appreciated that these terms are only limiting in their sense of relationship with respect to each other in that an electrical connector may be oriented in an almost limitless number of posi-tions~ as is well known to those versed in this art.
Referring to FIG. 2, an enlarged view of part of the rear portion of the connector 10 of FIG. 1 is illustrated in an enlarged view to more clearly show that the ribs 24 define channels which have insulation-piercing contact portion 38 supported there-in, each of the contact portions 38 including one or more insula-tion-piercing notches 40 formed by a pair of opposed sharp edge portions 42. ,The ~hannels 26 extend upwardly to form notches 36 .
: .
to receive and have the conductors dressed therein prior to ac-tual electrical connection to the insulation piercing contact portions 38. Although this specific structure is illustrated herein, it is only typical of many suitable contact structures which may be utilized in an electrical connector and wh.ich may be supplemented, with respect to strain relief, by a strain re-lief adapter constructed in accordance with the invention.
~ eferring to FIGS. 3-7, a strain relief adapter cons-tructed according to the invention is illustrated at 44 as com-prising a genexally rectangular, elongate element, preferablymolded of plastic material, and which comprises an upper surface 46 having a shallow edge recess 48 which presses against -the in- :
coming portions of the conductors above the constricted notches 28 to increase the strain relief at the incoming portions of the conductors.
The recess 48, as can be seen in FIG. 6, is carried on a ledge member 50 which, when mounted on the connector, rests on the upper ends of the vertical ribs 24.
A plurality of pressure members, in the form of blades 52 which are similar to conductor insertion blades, are to be received in the channels to engage and press against the conduc-tors which have already been electrically contacted by the contact portions. Each of the blades 52 comprises a first narrow portion 54 to engage the respective conductor adjacent its entry into $he connector strain relie~ mechanism, second and third narrow por tions 58 and 60 for engaging the conductor adjacent the insulation- :
piercing notches 40, and a spur or projection 62 which extends beyond the distal edge of the blade proper to slightly dig into the insulation of the conductor and provide additional securement within the contact portion 38. The plurality of insertion blades 52 have been given the collective reference numeral 64 and consti-tute a means for engaging and urging each of the conductors into th~ respective insulation-piercing contact portion. The vertical ribs 24 constitute barriers between the contact portivns 38 which may be pushed apart by an insertion tool or oversize conductors causing decreased pressure on the conductors and -the possibility of decreased electrical reliability. The insertion blades 5Z
therefore provide several advantages including addi-tional pressure on the conductors, realignment of the barriers in those cases where the barriers have been deformed, and filling of the barriers to provide additional frictional forces between the barriers, the contact portions and the insulated conductors via the blades 52 for a tighter and more reliable assembly.
The strain adapter 44 is also provided with a force di-version means 66 which comprises a downwardly projecting member 68 having a lower edge formed in the shape of a comb having a plu-rality of tseth 70 and spaces 72 between the teeth 70. It will be apparent from FIG. 5 that each o~` the spaces 72 is aligned with a pressure blade 52, and as such receives a conductor therein, the conductor being subsequently bent upwardly so that the conductor at least partially wraps about the force diverter.
A wire clamping means 74 is provided opposite the recess 48 and the upper portions of the blades 52 and is constituted by a comb-shaped edge having a plurality of shaped teeth which form a plurality of complementary shaped constricted openings 80. Each of the openings gO is aligned with a xespective opening 72 of the force diverter to receive and hold the outgoing portion of the conductor in a position generally parallel to the electrically contacted portion of the conductor.
A pair of strain relief adapters is utilized for pro-viding additional strain reli~f on each side of the rear portion of an electrical connector. Advantageously, each o~ the strain relief adapters is identical to the other and asymmetrically com-plementary when positioned on opposite sides of the rear portion : - . -.. - . . ~ :: . . . .................................. -.
. ~
of a connector -to be cooperably inter~engageable with respect to mounting on the connector. For this purpose, each of the strain relief adapters is provided with a releasable l~ocking means 82 which, as can be best seen from FIGS. 4 and 7, comprises at one end o~ the adapter a resilient yieldable arm 84 which projects laterally from the adapter proper and which terminates in a se- :
cond projection 86 extending perpendicular thereto to form a hook.
The distal end of the projection 86 lncludes a cam sur~ace 88 which functions in cooperation with another slement to flex the arm 84 during engagement o~ the two adapters.
The releasable locking means 82 ~urther comprises, at the other end o~ the adapter, a cam sur~ace 90 which leads to a flat surface 92 which together ~orm a barrier that terminates at a shoulder 94. Beyond the shoulder 94 is a recess 96, and a sur-face 92 also constitutes the rear surface of another recess form-ed by a pair o~ surfaces 98 and 100.
As the $wo adapters are moved into engagement about op-posite sides o~ the rear partion 14 of a connector, the cam sur~
~ace 88 slidably engages the cam surface 90 fle~ing the arm 84 20 un$il the projection 86 slides along the surface 92. The projec- .-. . -tion 86 con$inues to slide along the sur.face 92 until it passes - ...
the shoulder 94 whereupon the energy stored in the flexed arm 84 is released causing the projection 86 to snap into the recess 96 and the arm 84 to snap into the recess formed between the surfaces :
92, 98 and 100.
The adapter 44 is also provided with means for posi- :
tioning, aligning, and guiding the adapter with respect to the ;..... ... :
connec-tor and with respect to the other cooperable adapter. Refer .:
ring tc FIGS. 1 and 3, each adapter 44 is provided with a pair o~
shoulders 102 and 104 respective cam guide sur~aces 106 and 108 .
to be received in the recesses 30 and 32. In addition, and as can best be seen in FIG. 7, the resilient yieldable arm 84 has .:
- 8 - ~.
A~ t upper and lower papered guide edges 110 and 112, respectively, for iniSially guiding the arm in-to the area between the suriaces 98 and 100.
Referring to FIG. 8, a pair of adapters 44 and 44' are illustrated in sectlon as they appear when mounted on a connector 10. In FIG. 8 a bundle of conductors, which may be in the ~orm of a cable 114, has a plurality o~ conductors which are electri-cally connected to respective insulation-piercing co~tacts of` an electrical connector. For simplicity, only two of such conductors have been illustrated. These two conductors include an incoming or lead in portion 116 and 118, respectively, an electrically con-tacted or intermediate portion 120 and 122, respectively, and a lead out or outgoing portion 124 and 126, respectively. In FIG. 8 the digging in o~ the projection or spur 62 is apparent, as is the additional strain relief provided by the shallow recess 48 and the wire clamping means 74. Also in FIG. 8 it will be appreciated that the force diverter 66 functions to prevent dislocation of conductors from the piercing notches of the contact portions when a pulling force is applied in the direction of the arrows.
The strain relief adapter connector is provided ~ith additional strain relief and is protected by a hood assembly in the form of a hollow housing 130 having a pair of complementary hollow shells 132 and 134, which are more specifically described below with reference to FIGS. 9-13. In FIG. 9, an adapted con-nector is illustrated as being mounted in the hollow housing shell 132. The housing shell 132 includes a top wall 136, a pair of spaced bottom portions 138 and 140, which define a recess through which the front portion 12 of the connector extends, a pair of portions 14~ and 144 spaced from the bottom portions 138 and 140 to form slots for receiving the mounting ~langes 18 and 16 of the connector 10, and a pair of end walls 146 and 148.
The end wall 148 is provided with a semi-circular recess ~ 9 _ P~ `3 150 and the top wall 13~7 is provided with a shallow reces~ d~
ned by a raised edge 152. The recesses 141, 150 and 152 are co- -operable and complementary to ~orm openings in the hollow hood assembly 130. As mentioned above, the ~ront portion 12 of the connector 10 extends through the opening formed by the recess 141 and its complementary recess. The recess 150 and its comple-mentary recess form an opening ~or receiving a bundle of conduc-tors which may be in the ~orm o~ a cabl~, while the recess de~ined by the edge 152 and its complementary recess forms an elongate narrow slot for distrihuting the individual conductors.
Each of the housing shells is provided with a longitu-dinally extending rail 154 which projects into the hollow interior of the housing at a point i~mediately above and adJacent the wire clamping means 74 o~ the strain relief adapter 44. As can be seen more clearly in FIG. 8, the rail 154 engages and presses the conductors toward the rear of the strain relie~ slots 80 to pro-vide additional strâin relief to the outgoing portions of the con-ductors.
Each o~ the shells is also provided with a boss 157 which has an adjustment screw 156 threaded therethrough to engage and position the connector longitudinally with respect to the housing.
The housin~ shells 132 and 134 are provided with a re-leasable latching means which performs several functions. First 0~ all7 as the shells are latched together, they clamp incoming and outgoing conductors so that additional strain relief is pro-vided for the entire hooded assembly. Secondly, the shells are releasably held together by the releasàble latching means. Al-thbugh four such structures have been indicated on the drawings, only one is illustrated in detail for discussion, the others bPing of the same structure. The housing shell 132, ~or example, inclu-des a recess 159 in which there is a shoulder 15~ which develops into a ramp 160 that terminates at the parting line o~` the shells.
The complementary shell 134 includes a pair of resilient yieldable arms 162 and 164 having a cross member 166 at the distal ends thereof which rides up the ramp 160 until passing the shoulder 158 whereupon the arms 162 and 164, and the cross member 166 snap into the recess 159.
A completely assembled hooded and strain relief adapted electrical connector 10 i5 illustrated in FIG. 13 as receiving a cable 114 and distributing a plurality oI individual conductors 114a. The hollow shells of the hood assembly 130 may be addi-tionally and mvre securely held together by the utilization of suitable additional fastening means, such as machine screws 168 and 170.
The hood assembly and conductor receipt and distribution illustrated in FIG. 13 provides for an L-shaped conductor distri-bution. Different forms o~ T-shaped conductor distribution are illustrated in FIGS. 11 and 12.
The hollow shells in FIGS. 11 and 12 have substantially the same structure as that previously discussed. Therefore, only distinguishing features will be dealt with in connection with the T-shaped conductor distribution arrangements.
In FIGURE 11, for e~ample, the housing 132' receives a plurality of incoming conductors in the form of a bundle or a cable 214 which are electrically tapped at the connector 12 and become outgoing conductors in the form of a bundle or cable 214.
The housing shell 132', and its complementary shell, are provided wi-th end wall openings 150' and 150'i for passing the conductors therethrough and clamping the pluralities of conductors when the hood assembly is latched together~
A combination of distributions between the structures of FIGS. 9 and 11 is illustrated in FIG. 12 wherein the adapted connector 10 receives a plurality of conductors in the bundle o~r cable 314 at one end o~ the hood assembly, passes through a num-ber of those connectors in the form of a bundle or cable 314~ at the opposite end of the assembly, and distributes the remaining number of individual conductors, as indicated at 314". This conductor arran~ement also takes into consideration that some o~
the conductors may be tapped and extended in a first direction, other conductors tapped and extended in a second direction, and even that further conductors may be extended through the hood assembly for ease in wire distribution without heing tapped or terminated. Also, dead end terminations may be accomplished with the conductor tap and strain relief features disclosed herein without extension of the outgoing leads much beyond the strain relief provided by the wire clampi~g means 74, and possibly the ridge 154.
Although the present invention has been described by reference to particular illustrative embodiments thereof, many changes and modifications of the invention may become apparent to those skilled in the art without departing from the spirit and ~- scope of the invention. It is therefore intended that the patent warranted hereon include all such changes and modifications as may reasonably and properly be included within the scope of this contribution to the art.
.
Strain relief apparatus for an electrical connector which employs a plurality of insertion blades which have a two-fold purpose has been disclosed. First of all, blades are em-ployed as a tool for engaging and forcing insulated conductors into respective insulation-piexcing contact portions of an elec-trical connector. Secondly, the blades are carried on a common member which also supports a comb-shaped member which receives the individual conductors between the teeth of comb to provide strain relief as the structure is snapped about the rear portion of the electrical connector. Two such adapters may be mounted on opposite sides of an elongate electrical connector and a common hood may be slid over the adapters to provide additional positive retention of the adapters.
~ primary object of the invention is to provide an impro-ved strain relief adapter which may be installed on the rear por-tion o~ an electrical connector which has already had conductors electrically connected to the contacts of the connector. Another object of the invention is to provide an improved strain relief adapter which is more suitable than prior adapters for use in connection with termination tools.
Another object of the invention is to provide an impro-ved strain relief adapter constructed o~ two identical one-piece molded structures which may be mounted on opposite sides of an electrical connector and which are inter-engageable with each other to clamp not only to the connector, but to each other.
Another object of the invention is to provide a strain relief adapter which provides strain relie~ on the incoming lead side and on the outgoing lead side of an electrical connector which constitutes a tap in a bundle o~ conductors.
~ 'Y:~
Another object o~ the invention is to provide a strain relief adapter which includes an integral diversion structure ~or preventing dislodgement of the conductors from their electrical contacts in respo~se to tensile ~orces applied on the outgoing ;
leads.
According to the invention, a strain relie~ adapter ~or insulated conductors electrically connected to contact portions supported spaced apart by an electrical device, comprises a plu~
rality of pressure members spaced apart corresponding to the spacing of the contact portions ~or engaging and pressing against first portions of the insulated conductors in the contact area, conductor clamping means spaced from the pressure members for receiving and clamping second portions o~ the ~nsulated conduc-tors along lines parallel to the ~irst portions of the conductors, :`.
and force diversion means spaced ~rom the pressure members and from the-conductor clamping means for receiving the conductors and preventing dislocation o~ the first portions in response to the application of tensilP forces to the conductors.
More specifically, the invention provides a strain re-~o lief adapter for insulated conductors which are pressed into insu-lation-piercing contact portions supported spaced apart in respect-ive channels in parallel rows on opposite sides o~ an electrical connector, the adapter comprising a pair o~ identical inter-enga-geable molded parts for opposite sides of the electrical connector and each of the parts including a plurality o~ blades for enter-ing the respective channels and pressing against the insulation-pierced portions of the conductors3 a comb-shaped edge opposite the blades having constricted openings for receiving the insula-ted conductors to clamp the outgoing lead portions of the conduc-tors, and a comb-shaped member parallel to and extending away from, the blades and the constricted opening comb clamping struc-ture for receiving the individual conductors between the teeth .
- -thereo~ as ~ mealls ~or diverting laterally and upwardly applied forces to pxevent dislocation of the conductors from the insula-tion-piercing contact portions.
The application of pressure to the conductors by the blades provides additional strain relief in that the blades fill the channels straightening any channel barriers which were de-formed during conductor insertion and creating frictional forces against the sides of the barriers as additional protection against loosening of the conductors.
Other objects, features and advantages of the invention, its organization, construction and operation will be best under-stood from the following de-tailed description of a preferred em-bodiment of the invention taken in conjunction with the accompa-nying drawings, on which:
FIG. 1 is a perspective view of an elongate electrical connector which may advantageously be provided with strain relief according to the invent.ion;
FI&. 2 is a fragmentary enlarged view of a part of the rear portion of the electrical connector of FIG. 1 specifically ~O showing a suitable structure for an insulation-piercing contact portion;
FIG. 3 is an elevation of the inner side of a strain relief adapter constructed in accordance with the present inven-tion;
FI&. 4 is a perspective view of a strain relief adap-ter according to the invention, specifically illustrating the outer side and one end of the strain relief adapter;
FI&. 5 is an enlarged fragmentary view of a portion of the elevation of FIG. 3 to more specifically show the structure of the pressure members and the relationship between the pressure mem~
bers and the structure provided for force diversion;
FIG. 6 is a partial fragmentary sectional view taken .- ,.
~ - - ~ .
- .-- . .
substantially alon~ the parting line VI-VX o~ FIG. 5;
FIG. 7 is an end view taken in the direction VII-VII
o~ FIGS. 3 and 4;
FIG. 8 is a sectional view, taken substantially along the line VIII-VIII of FIG. 9 illustrating a pair o~ -the adapters of FIG. 4 mounted on an electrical connector and covered with a hood assembly which provides additional strain relie~;
FIG. 9 is a complementary sectional view taken substan-tially along the parting line I~ of FIG. 8 illustrating an adapted connector ~mounted in one shell o~ the hood assembly, spe-cifisally showing the hood assembly features ~or providing an in~ ~:
coming bundle clamp and outgoing conductor distribution;
FIG. lO is a perspective view of the hood assembly o~
FIGS. 8 and 9 specifically illustrating a latching structure for releasably locking the housing shells together; .
FIG. ll is an elevation of a housing shell with an elec~
trical connector mounted therein, specifically showing the shell adapted for receiving and clamping incoming and outgoing bundles ``:
of conductors;
FI&. 12 is a completed housing assembly, with a connec-tox mounted therein, similar to FIG. ll additionally showing a narrow slot for distributing a portion of the conductors; and FIG. 13 is an elevational view of the apparatus of FIG. 8 as viewed in the direction XIII-XIII.
Referring to FIG. 1, an electrical connector is general-ly illustrated at 10 as comprising a forward portion 12 which, as is well known in the art, is mateable with a complementary connec-tor unit, and a rear portion 14 which carries the contact portions for connection to individual conductors of a bundle or cable. Con-nectors of this type may advantageously be provided with insula-tion-piercing contact portions~ one type of which will be discussed below. . .
. -~3`~P~
The connector 10 also comprises means for mounting the connector to a supporting device or surface, depending on its particular application, and in the particular connector illustra-ted in FIG. 1 a pair of flanges 16 and 18, including respective mounting holes 20 and 22 are illustrated as one type of such mounting means.
The rear portion 14 of the connector 10 is usually mold-ed from a plastic material as a structure which includ0s a plura-lity of spaced vertical ribs 24 defining a plurality of channels 26 therebetween on each side of the connector. The inner portion of each channels 26 includes a cons-tructed opening 28 ~or receiving a conductor and providing a certain amount of strain relief.
The rear portion 14 of the connector 10 includes a pair of recesses 30 and 32 at each end thereof which, as will be under-stood ~rom the description below, aids in locating and aligning the strain relief adapter.
It should be mentioned here that although reference may be made to specific directions and relationships, such as vertical, horizontal, above and below, these directions and relationships arP utilized for clarity only with respect to the particular orien-tation of the apparatus as illustrated on the drawings. It will be appreciated that these terms are only limiting in their sense of relationship with respect to each other in that an electrical connector may be oriented in an almost limitless number of posi-tions~ as is well known to those versed in this art.
Referring to FIG. 2, an enlarged view of part of the rear portion of the connector 10 of FIG. 1 is illustrated in an enlarged view to more clearly show that the ribs 24 define channels which have insulation-piercing contact portion 38 supported there-in, each of the contact portions 38 including one or more insula-tion-piercing notches 40 formed by a pair of opposed sharp edge portions 42. ,The ~hannels 26 extend upwardly to form notches 36 .
: .
to receive and have the conductors dressed therein prior to ac-tual electrical connection to the insulation piercing contact portions 38. Although this specific structure is illustrated herein, it is only typical of many suitable contact structures which may be utilized in an electrical connector and wh.ich may be supplemented, with respect to strain relief, by a strain re-lief adapter constructed in accordance with the invention.
~ eferring to FIGS. 3-7, a strain relief adapter cons-tructed according to the invention is illustrated at 44 as com-prising a genexally rectangular, elongate element, preferablymolded of plastic material, and which comprises an upper surface 46 having a shallow edge recess 48 which presses against -the in- :
coming portions of the conductors above the constricted notches 28 to increase the strain relief at the incoming portions of the conductors.
The recess 48, as can be seen in FIG. 6, is carried on a ledge member 50 which, when mounted on the connector, rests on the upper ends of the vertical ribs 24.
A plurality of pressure members, in the form of blades 52 which are similar to conductor insertion blades, are to be received in the channels to engage and press against the conduc-tors which have already been electrically contacted by the contact portions. Each of the blades 52 comprises a first narrow portion 54 to engage the respective conductor adjacent its entry into $he connector strain relie~ mechanism, second and third narrow por tions 58 and 60 for engaging the conductor adjacent the insulation- :
piercing notches 40, and a spur or projection 62 which extends beyond the distal edge of the blade proper to slightly dig into the insulation of the conductor and provide additional securement within the contact portion 38. The plurality of insertion blades 52 have been given the collective reference numeral 64 and consti-tute a means for engaging and urging each of the conductors into th~ respective insulation-piercing contact portion. The vertical ribs 24 constitute barriers between the contact portivns 38 which may be pushed apart by an insertion tool or oversize conductors causing decreased pressure on the conductors and -the possibility of decreased electrical reliability. The insertion blades 5Z
therefore provide several advantages including addi-tional pressure on the conductors, realignment of the barriers in those cases where the barriers have been deformed, and filling of the barriers to provide additional frictional forces between the barriers, the contact portions and the insulated conductors via the blades 52 for a tighter and more reliable assembly.
The strain adapter 44 is also provided with a force di-version means 66 which comprises a downwardly projecting member 68 having a lower edge formed in the shape of a comb having a plu-rality of tseth 70 and spaces 72 between the teeth 70. It will be apparent from FIG. 5 that each o~` the spaces 72 is aligned with a pressure blade 52, and as such receives a conductor therein, the conductor being subsequently bent upwardly so that the conductor at least partially wraps about the force diverter.
A wire clamping means 74 is provided opposite the recess 48 and the upper portions of the blades 52 and is constituted by a comb-shaped edge having a plurality of shaped teeth which form a plurality of complementary shaped constricted openings 80. Each of the openings gO is aligned with a xespective opening 72 of the force diverter to receive and hold the outgoing portion of the conductor in a position generally parallel to the electrically contacted portion of the conductor.
A pair of strain relief adapters is utilized for pro-viding additional strain reli~f on each side of the rear portion of an electrical connector. Advantageously, each o~ the strain relief adapters is identical to the other and asymmetrically com-plementary when positioned on opposite sides of the rear portion : - . -.. - . . ~ :: . . . .................................. -.
. ~
of a connector -to be cooperably inter~engageable with respect to mounting on the connector. For this purpose, each of the strain relief adapters is provided with a releasable l~ocking means 82 which, as can be best seen from FIGS. 4 and 7, comprises at one end o~ the adapter a resilient yieldable arm 84 which projects laterally from the adapter proper and which terminates in a se- :
cond projection 86 extending perpendicular thereto to form a hook.
The distal end of the projection 86 lncludes a cam sur~ace 88 which functions in cooperation with another slement to flex the arm 84 during engagement o~ the two adapters.
The releasable locking means 82 ~urther comprises, at the other end o~ the adapter, a cam sur~ace 90 which leads to a flat surface 92 which together ~orm a barrier that terminates at a shoulder 94. Beyond the shoulder 94 is a recess 96, and a sur-face 92 also constitutes the rear surface of another recess form-ed by a pair o~ surfaces 98 and 100.
As the $wo adapters are moved into engagement about op-posite sides o~ the rear partion 14 of a connector, the cam sur~
~ace 88 slidably engages the cam surface 90 fle~ing the arm 84 20 un$il the projection 86 slides along the surface 92. The projec- .-. . -tion 86 con$inues to slide along the sur.face 92 until it passes - ...
the shoulder 94 whereupon the energy stored in the flexed arm 84 is released causing the projection 86 to snap into the recess 96 and the arm 84 to snap into the recess formed between the surfaces :
92, 98 and 100.
The adapter 44 is also provided with means for posi- :
tioning, aligning, and guiding the adapter with respect to the ;..... ... :
connec-tor and with respect to the other cooperable adapter. Refer .:
ring tc FIGS. 1 and 3, each adapter 44 is provided with a pair o~
shoulders 102 and 104 respective cam guide sur~aces 106 and 108 .
to be received in the recesses 30 and 32. In addition, and as can best be seen in FIG. 7, the resilient yieldable arm 84 has .:
- 8 - ~.
A~ t upper and lower papered guide edges 110 and 112, respectively, for iniSially guiding the arm in-to the area between the suriaces 98 and 100.
Referring to FIG. 8, a pair of adapters 44 and 44' are illustrated in sectlon as they appear when mounted on a connector 10. In FIG. 8 a bundle of conductors, which may be in the ~orm of a cable 114, has a plurality o~ conductors which are electri-cally connected to respective insulation-piercing co~tacts of` an electrical connector. For simplicity, only two of such conductors have been illustrated. These two conductors include an incoming or lead in portion 116 and 118, respectively, an electrically con-tacted or intermediate portion 120 and 122, respectively, and a lead out or outgoing portion 124 and 126, respectively. In FIG. 8 the digging in o~ the projection or spur 62 is apparent, as is the additional strain relief provided by the shallow recess 48 and the wire clamping means 74. Also in FIG. 8 it will be appreciated that the force diverter 66 functions to prevent dislocation of conductors from the piercing notches of the contact portions when a pulling force is applied in the direction of the arrows.
The strain relief adapter connector is provided ~ith additional strain relief and is protected by a hood assembly in the form of a hollow housing 130 having a pair of complementary hollow shells 132 and 134, which are more specifically described below with reference to FIGS. 9-13. In FIG. 9, an adapted con-nector is illustrated as being mounted in the hollow housing shell 132. The housing shell 132 includes a top wall 136, a pair of spaced bottom portions 138 and 140, which define a recess through which the front portion 12 of the connector extends, a pair of portions 14~ and 144 spaced from the bottom portions 138 and 140 to form slots for receiving the mounting ~langes 18 and 16 of the connector 10, and a pair of end walls 146 and 148.
The end wall 148 is provided with a semi-circular recess ~ 9 _ P~ `3 150 and the top wall 13~7 is provided with a shallow reces~ d~
ned by a raised edge 152. The recesses 141, 150 and 152 are co- -operable and complementary to ~orm openings in the hollow hood assembly 130. As mentioned above, the ~ront portion 12 of the connector 10 extends through the opening formed by the recess 141 and its complementary recess. The recess 150 and its comple-mentary recess form an opening ~or receiving a bundle of conduc-tors which may be in the ~orm o~ a cabl~, while the recess de~ined by the edge 152 and its complementary recess forms an elongate narrow slot for distrihuting the individual conductors.
Each of the housing shells is provided with a longitu-dinally extending rail 154 which projects into the hollow interior of the housing at a point i~mediately above and adJacent the wire clamping means 74 o~ the strain relief adapter 44. As can be seen more clearly in FIG. 8, the rail 154 engages and presses the conductors toward the rear of the strain relie~ slots 80 to pro-vide additional strâin relief to the outgoing portions of the con-ductors.
Each o~ the shells is also provided with a boss 157 which has an adjustment screw 156 threaded therethrough to engage and position the connector longitudinally with respect to the housing.
The housin~ shells 132 and 134 are provided with a re-leasable latching means which performs several functions. First 0~ all7 as the shells are latched together, they clamp incoming and outgoing conductors so that additional strain relief is pro-vided for the entire hooded assembly. Secondly, the shells are releasably held together by the releasàble latching means. Al-thbugh four such structures have been indicated on the drawings, only one is illustrated in detail for discussion, the others bPing of the same structure. The housing shell 132, ~or example, inclu-des a recess 159 in which there is a shoulder 15~ which develops into a ramp 160 that terminates at the parting line o~` the shells.
The complementary shell 134 includes a pair of resilient yieldable arms 162 and 164 having a cross member 166 at the distal ends thereof which rides up the ramp 160 until passing the shoulder 158 whereupon the arms 162 and 164, and the cross member 166 snap into the recess 159.
A completely assembled hooded and strain relief adapted electrical connector 10 i5 illustrated in FIG. 13 as receiving a cable 114 and distributing a plurality oI individual conductors 114a. The hollow shells of the hood assembly 130 may be addi-tionally and mvre securely held together by the utilization of suitable additional fastening means, such as machine screws 168 and 170.
The hood assembly and conductor receipt and distribution illustrated in FIG. 13 provides for an L-shaped conductor distri-bution. Different forms o~ T-shaped conductor distribution are illustrated in FIGS. 11 and 12.
The hollow shells in FIGS. 11 and 12 have substantially the same structure as that previously discussed. Therefore, only distinguishing features will be dealt with in connection with the T-shaped conductor distribution arrangements.
In FIGURE 11, for e~ample, the housing 132' receives a plurality of incoming conductors in the form of a bundle or a cable 214 which are electrically tapped at the connector 12 and become outgoing conductors in the form of a bundle or cable 214.
The housing shell 132', and its complementary shell, are provided wi-th end wall openings 150' and 150'i for passing the conductors therethrough and clamping the pluralities of conductors when the hood assembly is latched together~
A combination of distributions between the structures of FIGS. 9 and 11 is illustrated in FIG. 12 wherein the adapted connector 10 receives a plurality of conductors in the bundle o~r cable 314 at one end o~ the hood assembly, passes through a num-ber of those connectors in the form of a bundle or cable 314~ at the opposite end of the assembly, and distributes the remaining number of individual conductors, as indicated at 314". This conductor arran~ement also takes into consideration that some o~
the conductors may be tapped and extended in a first direction, other conductors tapped and extended in a second direction, and even that further conductors may be extended through the hood assembly for ease in wire distribution without heing tapped or terminated. Also, dead end terminations may be accomplished with the conductor tap and strain relief features disclosed herein without extension of the outgoing leads much beyond the strain relief provided by the wire clampi~g means 74, and possibly the ridge 154.
Although the present invention has been described by reference to particular illustrative embodiments thereof, many changes and modifications of the invention may become apparent to those skilled in the art without departing from the spirit and ~- scope of the invention. It is therefore intended that the patent warranted hereon include all such changes and modifications as may reasonably and properly be included within the scope of this contribution to the art.
.
Claims (18)
1. A strain relief adapter for insulated conductors which are forced into insulation-piercing contact portions suppor-ted spaced apart by an electrical device which supports said adap-ter, said adapter comprising: a plurality of pressure members spaced apart corresponding to the spacing of the insulation-piercing contact portions to engage and press against first portions of -the insulated conductors; conductor clamping means spaced from said pressure members for receiving and clamping second portions of the insulated conductors along lines parallel to the first portions of the conductors; and force diversion means spaced from said pres-sure members and from said conductor clamping means for receiving the conductors and preventing dislocation of the first portions in response to the application of tensile forces to the conductors.
2. The strain relief adapter according to Claim 1, fur-ther comprising: a projection extending from each of said pres-sure members to engage and slightly dig into the insulation of the respective conductor.
3. The strain relief adapter according to Claim 1, com-prising: adapter locking means for locking said adapter onto the electrical device.
4. The strain relief adapter according to Claim 1, where-in the electrical conductors define paths and said insulation-pier-cing contact portions are supported in respective spaced parallel channels on at least one side of an electrical connector; said plurality of pressure members are spaced to be received in respec-tive channels; said conductor clamping means extends parallel to said plurality of pressure members; and said force diversion means being parallel and intermediate said pressure members and said conductor clamping means along the paths of the conductors.
5. The strain relief adapter according to Claim 2 wherein said insulation-piercing contact portions are supported in respective spaced parallel channels on at least one side of the electrical device said projections extend in the direction of insertion into the respective channel for pressing into the insulation of the conductor terminated in the insulation-piercing contact supported therein.
6. The strain relief adapter according to Claim 3, wherein said adapter locking means comprises means for locking said adapter on the electrical device with the pressure members urging the conductors into the respective insulation-piercing contact portions.
7. The strain relief adapter according to claim 1 in which said insulation-piercing contact portions are supported in respective spaced parallel channels on opposite sides of an el-ectrical connector, further comprising: first and second elongate members, each of said elongate members being for respective sides of the electrical connector and each comprising: said plurality of pressure members on one side of the elongate member; said con-ductor clamping means on another side of the elongate member; and locking means for locking said first and second elongate members on the electrical connector.
8. The strain relief adapter according to claim 7, wherein said locking means comprises: a first hook-shaped element extending from one end of said first elongate member; a second hook-shaped element extending from one end of said second elongate member; a first hook receiving portion at the other end of said first elongate member for releasably receiving said second hook-shaped element in snap-in engagement; and a second hook receiving portion at the other end of said second elongate member for re-leasably receiving said first hook-shaped element in snap-in en-gagement.
9. A strain relief adapter for contact portions sup-ported spaced apart in parallel rows on opposite sides of the electrical device, as set forth in claim 1, wherein said ada-pter includes a pair of identical interengageable parts for oppo-site sides of the electrical connector? each of said parts in-cluding said pressure members for engaging and urging each of the conductors on the respective side of the connector into the res-pective insulation-piercing contact portion, said force diversion means spaced from said pressure members for receiving the con-ductors in a partial wrap thereabout to prevent tensile forces on the conductors from dislodging them from the contact portions, conductor damping means spaced from said pressure members and force diversion means for clamping the conductors, and first and second complementary-shaped portions for cooperable snap-in re-tention of said first portion in said second portion of the other part.
10. The strain relief adapter according to claim 9, wherein said force diversion means comprises a comb-shaped por-tion for receiving the conductors between the teeth thereof.
11. The strain relief adapter according to claim 9, wherein said pressure members comprise: a plurality of members for engaging and pressing against respective insulated conductors, each of said members including a blade having a forward end, and a projection extending beyond said forward end in the direction of the respective conductor to slightly indent the insulation of the conductor.
12. The strain relief adapter according to claim 10, wherein said comb-shaped portion has a plurality of teeth defin-ing notches aligned with respective blades of said pressure mem-bers.
13. The strain relief adapter according to claim 11, wherein said pressure members comprise a wall extending trans-versely across and projecting beyond said blades, said wall par-tially covering the rear end of the electrical connector, said wall including a recess in one edge which is cooperable with the like recess of the other adapter part to form a slot for receiv-ing incoming portions of the conductors, and said clamping means comprises a plurality of shaped teeth in the opposite edge of said wall forming constricted entry slots therebetween for re-ceiving outgoing portions of respective conductors.
14. The strain relief adapter according to claim 9, wherein: said first complementary-shaped portion comprises a hook-shaped member including a first projection extending from the respective part, and a second projection extending substan-tially perpendicular to said first projection; and said second complementary-shaped portion comprises a hook-engaging portion including first means defining a first recess for receiving said first projection, and second means defining a second recess for receiving said second projection.
15. The strain relief adapter according to claim 149 wherein: said second complementary-shaped portion further in-cludes an interference barrier to the movement of said second projection into the second recess; and said first projection is resiliently yieldable to permit passage of said second projection beyond said third means for snap in reception of said second pro-jection by the second recess.
16. The strain relief adapter according to claim 15, wherein: said second projection and said interference barrier each comprise cam surfaces which are slidably engageable to cause yielding of said first projection.
17. The strain relief adapter according to claim 1, wherein the electrical device is an electrical connector having front and rear portions with insulation-piercing contact portions supported by the connector and accessible in rows on at least one side of the rear portion of the connector, the contact portions piercing the insulation of and electrically contacting respecti-ve conductors between incoming and outgoing portions of the con-ductors, said pressure members engaging and applying pressure to the conductors mounted in the insulation-piercing contact portions adjacent the incoming portions; said clamping means clamping the insulated conductors adjacent the outgoing portions at points spaced from the contact portions; said force diversion means being located between said pressure means and said clamping means with respect to the incoming-outgoing path of the conductors for re ceiving and reversing the direction of the conductors to provide the outgoing portions parallel to the incoming portions and to prevent dislocation of the conductors from the insulation-piercing contacts in response to the application of tensile forces there-to; and further comprising locking means for locking said adapter to the electrical connector.
18. The strain relief adapter according to claim 4, wherein said adapter is a one piece molded structure.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US53719274A | 1974-12-30 | 1974-12-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1072648A true CA1072648A (en) | 1980-02-26 |
Family
ID=24141612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA241,252A Expired CA1072648A (en) | 1974-12-30 | 1975-12-08 | Strain relief adapter for an electrical connector |
Country Status (21)
| Country | Link |
|---|---|
| JP (1) | JPS5193390A (en) |
| AU (1) | AU505395B2 (en) |
| BE (1) | BE837190A (en) |
| BR (1) | BR7508707A (en) |
| CA (1) | CA1072648A (en) |
| CH (1) | CH610151A5 (en) |
| DD (1) | DD123146A5 (en) |
| DE (1) | DE2556598A1 (en) |
| DK (1) | DK595375A (en) |
| ES (1) | ES443954A1 (en) |
| FR (1) | FR2296950A1 (en) |
| GB (1) | GB1501750A (en) |
| IL (1) | IL48529A (en) |
| IN (1) | IN144955B (en) |
| IT (1) | IT1051685B (en) |
| NL (1) | NL7514569A (en) |
| NO (1) | NO142058C (en) |
| PL (1) | PL109973B1 (en) |
| RO (1) | RO75524A (en) |
| SE (1) | SE7513982L (en) |
| ZA (1) | ZA757477B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4080038A (en) * | 1977-04-28 | 1978-03-21 | Bunker Ramo Corporation | Non-bulging quick snap-on strain relief adapter |
| FR2528241A1 (en) * | 1982-06-07 | 1983-12-09 | Cemrep | Plug-in connector for telephone distribution sockets - has lid with hooks engageable with shoulders of housing contg. flat contact blades and requires no screw-fixing of cable |
| FR2551511B1 (en) * | 1983-08-31 | 1985-11-29 | Renault | DEVICE FOR FIXING A COVERING ELEMENT ON A SUPPORTING ELEMENT |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3162501A (en) * | 1960-01-21 | 1964-12-22 | Amp Inc | Electrical connector |
| NL277977A (en) * | 1961-05-03 | |||
| NL290249A (en) * | 1962-03-23 | |||
| US3708779A (en) * | 1969-05-12 | 1973-01-02 | Minnesota Mining & Mfg | Wire-splicing apparatus and method |
| US3804971A (en) * | 1971-06-28 | 1974-04-16 | Minnesota Mining & Mfg | Solderless wire connector |
| AU5574573A (en) * | 1972-05-30 | 1974-11-21 | Amp Inc | Electrical contact elements and connectors electrical contact elements and connectors |
| US3824530A (en) * | 1972-12-05 | 1974-07-16 | Amp Inc | Installation of electrical connectors on wires intermediate the ends thereof |
| US3879099A (en) * | 1973-09-04 | 1975-04-22 | Amp Inc | Flat fexible cable connector assembly including insulation piercing contacts |
-
1975
- 1975-11-24 GB GB48237/75A patent/GB1501750A/en not_active Expired
- 1975-11-24 IL IL48529A patent/IL48529A/en unknown
- 1975-11-26 AU AU86979/75A patent/AU505395B2/en not_active Expired
- 1975-11-27 ZA ZA757477A patent/ZA757477B/en unknown
- 1975-12-02 IN IN2289/CAL/1975A patent/IN144955B/en unknown
- 1975-12-08 CA CA241,252A patent/CA1072648A/en not_active Expired
- 1975-12-11 SE SE7513982A patent/SE7513982L/en unknown
- 1975-12-15 NL NL7514569A patent/NL7514569A/en not_active Application Discontinuation
- 1975-12-16 DE DE19752556598 patent/DE2556598A1/en not_active Withdrawn
- 1975-12-18 RO RO7584243A patent/RO75524A/en unknown
- 1975-12-19 CH CH1651975A patent/CH610151A5/en not_active IP Right Cessation
- 1975-12-22 IT IT30613/75A patent/IT1051685B/en active
- 1975-12-24 FR FR7539745A patent/FR2296950A1/en not_active Withdrawn
- 1975-12-29 NO NO754405A patent/NO142058C/en unknown
- 1975-12-29 PL PL1975186288A patent/PL109973B1/en unknown
- 1975-12-30 BE BE163206A patent/BE837190A/en unknown
- 1975-12-30 DK DK595375A patent/DK595375A/en not_active Application Discontinuation
- 1975-12-30 BR BR7508707*A patent/BR7508707A/en unknown
- 1975-12-30 DD DD190655A patent/DD123146A5/xx unknown
- 1975-12-30 ES ES443954A patent/ES443954A1/en not_active Expired
-
1976
- 1976-01-05 JP JP51000717A patent/JPS5193390A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| NO142058B (en) | 1980-03-10 |
| JPS5193390A (en) | 1976-08-16 |
| AU8697975A (en) | 1977-06-02 |
| RO75524A (en) | 1981-01-30 |
| IL48529A (en) | 1978-07-31 |
| FR2296950A1 (en) | 1976-07-30 |
| AU505395B2 (en) | 1979-11-22 |
| NL7514569A (en) | 1976-07-02 |
| SE7513982L (en) | 1976-07-01 |
| ES443954A1 (en) | 1977-04-16 |
| ZA757477B (en) | 1976-11-24 |
| IL48529A0 (en) | 1976-01-30 |
| NO754405L (en) | 1976-07-01 |
| BE837190A (en) | 1976-04-16 |
| NO142058C (en) | 1980-06-18 |
| DE2556598A1 (en) | 1976-07-08 |
| PL109973B1 (en) | 1980-06-30 |
| IT1051685B (en) | 1981-05-20 |
| DK595375A (en) | 1976-07-01 |
| IN144955B (en) | 1978-08-05 |
| GB1501750A (en) | 1978-02-22 |
| CH610151A5 (en) | 1979-03-30 |
| DD123146A5 (en) | 1976-11-20 |
| BR7508707A (en) | 1976-08-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |