FR2634075A1 - METHOD FOR PROTECTING ELECTRICAL CONNECTOR CABLE - Google Patents

Abstract

The invention provides a cable-connector assembly comprising a container 30, a cable 31 and two connectors 35, 36. The container, in which the cable is coiled, is composed of a body 32 carrying two orifices 39, 40 each capable of forming housing a connector. Preferably the container is cylindrical and includes a front flange 33 and a rear flange 34. Each flange is provided with a collar 45 in which the connector placed in its protective case 37, 38 can be slid. The connector is fixed in the collar. by mechanical locking means 41, 42 acting, on the one hand, on the collar or the flange and, on the other hand, on the end of the connector. Preferably, the locking will be done by means of a slotted part integral with the flange and able to be housed in a groove formed in the end of the connector. This type of arrangement is particularly suitable for a coaxial connector cable, for example, for underwater use.

Description

DESCRIPTION

  The invention relates to the field of electrical or electronic connections between two or more points, which

  implement a cable provided with connectors.

  The electrical or electronic connection is in itself of high quality and reliability, and has a long service life. By this is meant that each component of the system is optimized individually according to the most advanced technique, and that all the characteristics of the components are tuned to each other. Important characteristics that can be mentioned for example from the electronic point of view: shielding against electromagnetic interference, resistance of the contacts, impedances; from a mechanical point of view: resistance to shaking and abrasion, flexibility at low temperatures, adaptation of thermal expansion coefficients, etc .; and from the chemical point of view: resistance to aggressive media (seawater, hydrocarbons, flue gas, ..) or aging

  accelerated under the effect of intense solar radiation.

  The electrical or electronic connection must also be able to be established under adverse conditions such as temperature extremes, inclement weather, sand wind, wind or water pressure, mechanical vibrations and shaking, water currents, etc. The points between which the link is established may finally be stationary or mobile with respect to one another and be as well under water at the same time.

  water surface, underground or above ground or in the air.

  Considering the environment in the liasr. must be established and maintained is often one. electricity conductor (seawater for example) it is always imperative to achieve a good seal, not only the connectors themselves, but the whole system of the entire conr.ecteur cable, and maintain

  this seal throughout the operational lifetime.

  Reliable binding under the circumstances mentioned and of the desired quality can only be achieved when all the individual constituents are at all times ready to fill.

their function.

  This is only the case when three kinds of precautions are taken and three kinds of costs are satisfied: 1. in the case of servitude, that is, during the storage which can in some cases not last, the whole of the cable connector must be protected as effectively as possible against any external adverse influence, such as for example mechanical stresses jolts, vibrations, wear, abrasions, point loads, oblique inclinations , sand infiltration ...) or agents such as hydrocarbons, seawater, corrosive fumes of combustion gases, etc. 2. During commissioning and during all operations to make the connector cable operational, measures shall be taken to eliminate or diminish any influence which may impair (or deteriorate in the long run) a good electrical or mechanical connection or interfere with the tightness of the connection. Such measures often result in complicated connector construction. It is necessary, for example, to provide scraper o-rings to move the sand grains, the sludge, the penetration water, O-rings isolating various compartments of the connector, a mechanical locking by a bolted screw, a setting by hydrostatic pressure, an impregnation and capping with silicone oil, radial internal pressure applied to the contact points by a resilient body etc. 3. finally, all these external protective measures as well as all the intrinsic arrangements must cooperate in such a way that an implementation of the connector cable can be done as quickly, simply and reliably as possible while the external protection means have to

  be advantageously compact, light, simple and convenient.

  None of the currently known systems responds

  simultaneously satisfactorily to the three conditions mentioned.

  According to the state of the prior art known individual components are known, such as the components of a plug and a base, but not yet coherent systems,

  reliable, and easily made operational.

  German patent E 11 C7 314 describes for example

  a waterproof connector in which the card which presents

  Tapered rubber sections are stuck in the plinth by hydrostatic pressure while out of the water sealing is performed at the same time as locking by three consecutive O-rings. No action is taken to maintain electrical contact in mutual contact with pressure

  sufficient reciprocal out of the water or shallow.

  US Pat. No. 3,641,479 discloses a sealed plug for coaxial cable which is fixed in the base by mechanical means, in particular by a perforated bolt-shaped screw. The system nevertheless has considerable disadvantages. Indeed, when the connection is made in a humid environment, which can hardly be an exception, it is mandatory to fill the base with non-conductive silicone grease in order to move as much water as possible. inward because of the very construction of the constituents. This formation of water pockets inside the connector itself, however, can not be avoided completely and can quickly give rise to a degradation of at'Atap-lsa, Do 'sjnaDnpuoD xnap salt' xneu2; s ap inssuCa liauaz inazDnpuoD ai vz9ee outaj q! no.i; z unp aquanbesqns uo! Imlaoj Ll za Glanea-nxa euT2 el ap uoT.aosjad ap sez ua i xeoD aiqU nss 9ssai s PUIq np 2uol at ne8a G ap ZuG @ LueTUUq GI aJTpJa) anod asTad asauis aunszuuiaUeiui O xnfuuis ap anflgamsumaZ iieud anflfonpuoz and the 'usauuoUOaTAUaI ap neal aau; IaaTia-eq ITilTn the alnas and aw: aoj nb '9aqT! Dueve, p anbTIao; u-: o a, p -peZur; uiTwxoid Lt suep' q ;; Dp uoTZnoDxaa, p 3ptCv sI Su-p 'IGTP -? -; se, D' GnbTZTaD euoz Gun suep STOJ 3a a.ooua zuoj s uSTIenTnDDne za uo; sseJdT-oo 5 3rd ea3e-D-DCS r, tavéed es'L = 9; uZaZ e * -9.Uue? ZT <,; - j] 72sd a gi J: ne9, s -s rs] xd cUT-fu T 3 3 l 4.J ubbUdOu! ds D 2.Uo _uts 9t0S9T SUDpsSruin3DDe sap-OS no Sspln57I sagT / Bu SI sa-n3Z LOo; 3TiTJ Ul ap - X8 SQnv, mIe ainpozd Gs nb; us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us us? D ,, r, 3r_Z -Sv3D s =: = 'snoq' Giqes) sort7-zs sgfpuor; -nDzooSu2 'dUo3uSg C T-ip-aoqzuro? a-a-uzDszoj $ DqzTj -T sp sjz-; rozsa uc: r.iD ntu: -Dun, p: e; TnS; j5 nb: lru: -x- S :: o $ sp = -a: aTi :: sss = ss sGIsnb Zuop 'nsnuoI eI sanoz anszu-esuoo zsa;: J Dp aaju eIp Wstp enbUU3 np eaznsra.usu.g * uoousn'-u-uosejq-e amd' * esodxa ssejz3ns aznoi sp sgnzuaRzl sgnSn sun jGutejLue -ssne speui sezToloaogd no ssaulIosT ssnbT. o919 ssnby; s72s-, O o sep 3 pTdPa s-9tJ uo p 3 Z 9p; e sun enbo.-oad; usuisnssuou, nsd: nb s, ansi ^ u:, i es-ul-O uSlspepe, Io, sse ze; suG 1s3e ss4DJ e s; si3a eFp ssjo 3ss-. o FFrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr s-7id-x9: ed smmoa se: lIoaqgd s; -npoad sap aed no 'TS2upiTDo aoeruoD eo; aed ueiTsITDeJ aSGA.ua sz; ZnGd :: u.xd uoz30s; od apssszaesss sn-d uyTSoaJJo sp uo: eonpu: aed zusuuezou 'snB: osi se; uo SLO9 two naked and close to each other, and that same

  at the cable entry in the plug.

  Also known are French patents No. 73 28 782 and German DE No. 24 30 074, describing a waterproof connector of the plug and socket type which, as described in the German patent DE No. 11 07 314 mentioned above, take advantage of the fact of jamming the plug in the base by the hydrostatic pressure. No means is provided to lock the connector under normal pressure, that is, out of the water or at low immersion. In the embodiment described for application to coaxial cables no measures are taken to form

  sealed compartments between the electrical contacts indizidueis.

  Deterioration or obstruction of a single O-ring is enough to break the connector out of use due to loss of watertightness

and formation of a free circuit.

  In addition, as in US Pat. No. 3,614,779, insufficient measures are taken to prevent water infiltration along the shielding braid once the outer sheath is pierced. such

  infiltration can cause a free circuit.

  The section of the non-stripped cable which is clamped between the two electrical contacts and in which the shielding braid is extended forms only a minimal obstacle to the flow of water before reaching the central conductor

signal transmitter.

  In order to overcome these drawbacks, the object of the invention is to propose a coherent and reliable system, comprising external protection means, integrated sealing, locking and safety devices, guaranteeing reliability and long service life. electrical or electronic connection, as well as storage and

  in simple, effective and appropriate service.

  This goal is achieved thanks to the characteristics of

claim 1.

  In order to better disclose the invention and - not limitatively, a mode of realization-referred referenced will be described with reference to the following figures: Figure 1: represents a longitudinal section of a protective coil during storage. - Figure 2: represents a longitudinal section

  a male waterproof plug with its protective case.

  FIG. 3 shows a longitudinal section through the waterproof plug, its protective case and the means

mechanical locking.

  In Figure 1 which schematically shows a longitudinal angle across a wide range of activities. t u. this connec-e-ur

  service, inside the coil 3. This coil is itself

  Even with a body -32 essential in hollow-tube

  and in that said connector cable 3 is mounted with two lateral flanges 33, 34, a front flange and a rear flush respectively. The connector cable used, for example, a standard coaxial cable of the KX-type and from 1 to 1000 meters in length, consists of a sealed outer ga-ine, an outer cable under shielding ply, of an intermediate (dielectric) isocyanate to pzlyethylene, and a

central signal transmitter.

  Two male connectors, in the example, 3.36 places each in a protective case 3.38, are locked in respective housings 39, 40 and cooperating with the protective case 37, 38 on the inner side of the coil 3C, and with external mechanical means, the latter being represented in the form of split caps 41,42 in semi-rigid material. This assembly of the complete coil 30 is extremely compact and allows a

  effective protection of the cable 31 and connectors 35,36.

  The connectors 35,36 placed in their case 37,38 can not be released due to vibrations, shocks etc. because the split plugs 41, 42 secured to the front and rear flanges 33,34 are taken up in a groove in the front part of the connector, such as a circlip. what will be

  shown more clearly in Figure 2 below.

  This arrangement prevents the connectors 35,36 from falling inside the coil 30. In use, the split plug assembly 41,42, connector 35,36 and protective case 37,38 is removed by a simple action. manual for example by traction and rotation relative to the flange 33,34. Then a first operation is to remove the split plug 41,42 35,36 connector which allows just before the use to remove

  the protective case 37,38 of the 35,36 connector.

  The protection of the connector 35,36 is therefore maximal, the protective case 37, 38 can only be removed after

  the removal of the split cap ai, - <! ui yourself.

  FIG. 2 represents a longitudinal section G through a connector of the sealed plug type, provided with its

protective case 21.

  We can distinguish the three main elements that form the assembly namely the connector cable 31, the sealed plug 20 and the protective case 21 cooperating with the surface

of the card 20.

  If the protective case 21 is removed, the plug 20 has on the outside two electrical contacts 5,5 'respectively corresponding to the outer conductor of the braided shield-shaped cable 22 and to the inner signal-transmitting conductor 9. An electrical conductor 1i connects the contact 5 to the outer conductor 22, and a conductor 23 connects the contact 5 'to the inner conductor 9. On the same diameter as the contacts 5,5' are disposed two O-rings 7 and 7 'which surround the contact 5' corresponding to the inner conductor 9 creating in this way a sealed compartment within which the contact 5 'is located. Two other O-rings 6 and 8 are arranged in front and back of the contacts 5 and 5 'and on two other diameters, these ensuring the first sealing of the plug-shaped connector. 20 during its subsequent use and sealing during the storage period the xna p 2 aalnssu qsa nd ainSTaeX5a GUTI2 Bl 43 3G13TI1U 9a1Z1d 9alGD JZU suanTGIÈvqZUMEZ3, - * 1 GaGT.IJLz -uuL3laId 0Z lnsDosuuoz a1 suBp 5a12, Uid I [ixmooD alq-o sq To a2pnos no s2IIoi jd IduiSxa avd aginsse that? enuaq jnal '3fBluom np l inssi l 3 mnj nu s5.1nf xnu sun sal a9sqoqtias% uGuuaTATnb as.TdoiddeanbTsIeld IaTqstMuaSJUUTOST ú'Z'IOú squswgTs, p asnbSSPID z3ssB Gaa! uUeM bunp gn; ITsuoo Zsa 9IdmeXa erd ael uaqTJadX; ap OZ inaq; Duuooal aiTnsug

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  xnUau2; s ap no sa92p-r vnzdrsB3 unp alduaxa ard GTsOS no. and, in the above example, there is shown in FIGS. s oz oz 7 7 7 7 7 7 7 7 7 7 7 7 7 7 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4. 4.-------------; 3, p ln: J?, P a: a3U3 e, p 3 |: 4CS ns ......... a> DBlfsv, 3 UOS suup 3zUo'2u 153 0Z t -; DSuuoD O3 have nscl ' -Sbp- - ^ s, ouolES:; and e3p sioI 'sTOJgno; nsuol. ## EQU1 ## where, in the above, the present invention can be described as follows: ## EQU1 ## % Ua: Gnnad 9 its 9 sanbTlOl szu: iss; sD: 3D4 p ^ sn2uo'laps; Gdaun sa, .jw% nasoauuoo slqo np SDD: s usa qss: -I GP sjoI s: giOgfs; -cSS a suD ^ g2: nszuus0z np u Uo 3s.i, ap Sg d '' n z7u nl sruGnoau: a Ga -nzGs 3p no sSrnpusss 3a = s "= * =, s; urr? a <uo eo ss is ouuos su: oTSTO l sa 'su Odauos sed ZUOS au.La 1 sanb: -dlSsuio? sae ITZna; saod inoi apOi a -3 UT 3.

  .p np xnaD-pnj? xloqp a B 3Dp'9 Àanz-uo! Ga: znad Tuanbos rb 'apc; agd as; oD uZt; mnp a2! AM3uagai a.insss anod s la.doD luos 8 qa 9 sanbDio% sulioC sai sInGs'aG2 os sp C-spoliB! Sps ao1uosD aB -doadde ace a suBp uoTn.asu S aud guuo: lzagdo npuai meas CZ anaqszuuooD a1 enbsjol nan2nuol ml aznoz ans jaoco south sU ap 8 ', the 9 senbTiol s uTor xne ai ss sJ $ sno5Suo sa3a1 - .. p sanS-snid e 9Sl 33B2uou S9 I anaaDaojd; 1n you; s su = p vsDld zsa OT anazsauuos al anbsao1 sZ 0ú9E by different processes. For example, a self-adhesive heat-shrinkable sheath 10 may be used at the same time on the outer sheath of the cable 31 and on the rear part 1 of the plug 20. An adhesive 13 placed between the outer sheath of the cable 31 and the internal bore of the rear portion 1 of the connector 20 adapted to the outer diameter of the cable 31 seals the other side. However, it is important to point out now the special measures taken to prevent the water from running along the braided screen in the event of perforation of the outer sheath of the cable 31 and to infiltrate it inside. DTD: of the connector 21 .

  Indeed, during the use of the connector cable 31 under severe conditions it may happen that the sheath of the cable 31 is pierced and under the often considerable effect of hydrostatic pressure water can flow as we have seen many times by tests and er. practice along the shielding braid 22 which forms the outer conductor, around the dielectric 16 and come to establish a free circuit between the outer conductor 22 and the central conductor transmitter of

  signals 9 or between the contacts 5 and 5 '.

  To preserve the information transmitted by the coaxial cable 31, it is essential to maintain an insulation between the central conductor 9 and the outer shield conductor 22, even if the latter is grounded by accidental contact with seawater, for example . As long as this isolation remains intact and also according to the nature of the signals (remote control, video images ...) some transmission will always be possible. To preserve this insulation to the maximum, the contact 5, reserved for the central transmission driver 9, is flanked by two O-rings 7 and 7 '. In addition, an additional and special sealing barrier 24 is arranged between the dielectric 16 made of polyethylene and the central element 2 of the plug 20. In order to make this barrier 24 and taking into account the inherent difficulties in bonding the pure polyethylene, it is made use of complex techniques, including the use of a polyethylene / aluminum-adhesive laminate, adhesion

  of these materials is obtained in the laboratory conditions.

  The particular additional sealing barrier 34 is therefore composed of a laminate formed by three successive layers of different materials, namely (from the inside to the outside) of a layer of ethylene-fused polyethylene. to the polyethylene forming the dielectric 16 of the cable, this layer being itself ccllée against a sheet of aluminum ium, - that in turn is glued against the parci interior of the intermediate section 2 of the sheet 2 ^, this seétion being réa : born by

  example plastic AES terpcy.mére.

  Figure 3 shows a section through the EtangAe connector 20, the rotator case 21 and the mryens.

  Locking machines, here represent a hook.

  split 41 in semi-ssu-ie material. The figure shown is the constructive construction described above, how the 2C connector itself is laced in its proscenium and its second respective flange of the motherboard. intermediate of a split piece 41 which allows a small resistance of the connector 20 on the flange and the simple release of the connector assembly ú ^ - protective case 2. by a manual cpratfcn (traction / rotation; The device shown in the form of a slotted plug 41 makes it possible to lock said connector assembly 20 - protective case 21 and does not allow it to slide during the storage period. the inside of the coil 30. At the same time, it first requires removing the split plug 41 before the protective case itself can be removed, thereby providing maximum protection until the connector 20 is to be inserted in

  the base or the appropriate receptacle.

  An elaborate system that is consistent and reliable as described can meet all the requirements and achieve

purpose of the invention.

  Of course, other achievements are possible

  without departing from the scope of the invention.

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  springs outwards through the perforations provided in the respective flanges, is locked by the same mechanical means (41) the protective covers (21) on the plugs and the set-protective case on the collar (45) bordering the perforations flanges. 2. Method according to claim 1 characterized in that to make operational the cable (31) is detached from the outside the mechanical means (41) locking the assembly plug-protective case on the collar (45) of the flanges (33, 34), said assembly is withdrawn followed by the cable from its housing (39, 40) and through the perforation, onr. detaches the mechanical means (41) locking the protective case to the plug, thereby making the cable (31) ready for use after removal of the protective case (21). 1, 3. Process according to claim 1, characterized in that that the mechanical means (41) cooperating with the peripheral groove (14) at the front end (3) of the plug (20) and desz.nés to lock the pre-tector case on the plug at the same time te.mps that to retain the assembly plug-protective case on the flange (45) integral with the flange (33,34) serve at the same time to prevent that the assembly plug-protective case can fall inside the container (30) a fact that said assembly was manually removed from the collar (4) in a preliminary operation to

  commissioning of the connector cable (31).

  4. Method according to claim 1, characterized in that the peripheral groove (14) is designed at the end (3) of the plug (20) so that it can also collaborate with mechanical means (41) for locking the sealed plug in a base or in a suitable receptacle during the clean commissioning of the connector cable (31) to 5. The method according to claim 1, comprising a coaxial cable of current construction consisting of an internal central conductor (9). ), an intermediate dielectric insulator (16), an outer shielding conductor (22) in the form of a braid, a sealed outer sheath, connectors of the plug type sap (E) sdioD unp asodioo (0u) (a) (a) (a) (a) (a) (a) (5) (a) (iZ) InoDoload Inca a '1aaua.ure 9; T (i1) GnbTJaTqdT! Ad a.2O gun allenbul sump ([) uae a9l! 3 * 3axa aun, p sn.A.gnod (OZ) aiUui aqz9eq glqDTJ aun: umlioduioD 'L UOtoDipuaAa Pl Uosis JTTlsodsTQ' T-aI za4o oaa ueaGdooo (Ti) aesIInoai.a ap sanbTuBoDG 0u suaoui sapaToAgaa oJioAnodap uTjU soDj I ap (U) TuZA e! TuiaJaXa, l suep (I) anbTJGTqdTad a2ao2 aun, p suaaquT pioq al qa aqiqo az9h9 np atlzj ml GDp a! jgadg. gd uI ans a: oqeia (d) haaJep 2slloD a saiua s3Ts3D e aIg Zsa aGuol% ansen2uol es anb asua the 'sIaos l 3p a3oo np allaz aslpad snid and TUlCZ 3p UOTlDIODZou; TI, OD up anun9'o; his Tnb a9isD g ruspu

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  Z'-Gc TO ic -} zzlDJ l,: n: Ll-vOSGnb 3D ua 3S.DCeD gos eT 3p 3Tcz nop 3nb ul: q.: Ssne zqoTJ [l gp uo; DonpolU; Tp O? ^ OD OD n - - - - - - - - - - - -)))))))? ## EQU1 ## where: ## EQU1 ## O) - 3 De, Uoj eIp 31'pe1 Zal'j 1-_ 'S3Ti to 3_3ss3TI Ss1--33ajjip saa3T.T,' 3p StuZ.sv.i. X39âD Zc ,, D SSJID 5J Tras a 3.Zm -, _ uOnb 3D rua s7-7zoo u: -_Opus: .sa ei uoi? pooa'9! '6) 3p?, - = o 3p3'131 -UTusa nSznpuozaI apu: az 13 GU-DSjl9P in9Ta1u; I, lUoI snuTT Sd 0 sa2UdoJd as ass: rn Gu 3SS3 "1 3p aojJ sr. (ZZ>) a2pu! Tq 3p suD1asxa naqDnpuoD1, a has InGLxa hue MI 3.U3.UMllTjUTS nual ap admaxg Ead snb Gzos ap 'aoDTJ ul ap aJnaIT: u; Toaed aI? (<9;) anbiDa: atiP aJ; a: pu'u: uaIOSTi ju3eIaq: sJaoagz9 la ZuaZaI; TPTIOS a-lnsua; uoalauuoo ua -a '(ZZ) assa.I ap aUijoJ snos as2pu: iq ap a3u.axa s naDnpuos al' (92) aiTDuea, sana) Tiaxa auTa2 alaqd np asTdoade Jnan2uoI aun ans paoqe, p 1uealuaI u3 lsa () a zusa..s 9Zsa or1, p a31rajq sun SGTqDo S3p S nslzluFi?, nb GD ua GsIi3: 1zle 'a (9) sqoum, iam

SZ 0ú5Z

  rear and front flanges (33, 34) provided with the outer side of a collar (45, 46) bypassing a perforation, characterized in that the mechanical means (41) cooperating with the protective case (21), the peripheral groove ( 14) in the front end (3) of the plug (20) and the collar (45,46) bypassing the perforations in the front and rear flanges to lock the protective case on the plug and then the plug-in assembly. protective case on the collar consist of split caps

semi-rigid (41).

  9. Device according to claim 7, comprising a protective sleeve (21) in the form of a socket and a plug-type sealed connector (20), characterized in that it comprises, on the cable side, around its periphery, a collar for stopping (25) and on the opposite side before (3) a peripheral groove (14), these two means being able to cooperate to lock with mechanical means

  the sleeve-shaped protective case (21) enclosed around

the card (20).

  16. Device according to claim 7, comprising a protective case (21) and a sealed connector (20) of the plug type provided with o-rings (6,7,7 ', 8) housed in peripheral grooves (14). ) and at least two contact elements (5,5 ') interposed between said consecutive O-rings and thus separated from each other, characterized in that the plug (20) consists of at least three consecutive sections (1,2,3) of different diameter and decreasing, the largest being that of the cable side, the smaller the one of the opposite side, each section carrying at least one O-ring in a housing, the dimensions of the joints, housings and front and rear sections of the plug being chosen so that when the protective case (21) is put in place and collaborates with the inside diameters of the protective case which is enclosed around the plug (20), only the gaskets uvant at the ends (6,8) are solicited ensuring alone the sealing of the assembly plug-protective case, the joints carried by the intermediate sections

  (7,7 ') remaining uncompressed and undecreased.

  11. Device according to re: endicatiocn 7, compzrtant a sealed connector (20) of the plug type, a coaxial cable consisting of a central conductor (9), d'urn isoant intermediate dielectric (16), a external conductor (22) for braiding in the form of a braid, a sealed outer sheath (26>, an additional sealing barrier (24i between the dielectric intermediate insulation (16, and the inner part of the plug, characterized in that said barrier (24) is formed by a laminate 1C composed of a polyethylene layer, welded to said intermediate member (16) and a backing sheet of the other, this leaf leaf being

  of the file by registered ads.

  2. Eispositif sel-n the re-en-difcaticn 7, characterized i5 in that the i connector connector i. is assigned to several individuals. 1_. Device according to Claim 7, characterized in that the central cavity (31 is provided with two connectors 2v 114. Device according to claim 1, characterized

  in that these connectors are of the other type.