FR2736755A1 - DEVICE FOR QUICK CONNECTION OF AN ARMORED CABLE TO AN UNLINED CABLE - Google Patents

Abstract

The device for quick connection of a shielded cable (100) to an unshielded cable (101), comprises a connector (2) having a first end (3) having a bore for receiving a male connector end (106) of the shielded cable (100) and a second end (4) having a shape corresponding to a connector end (110) of the unshielded cable (101), a dielectric body (7) having a first end (8) surrounding at least the first end (3) of the connector (2) and extending beyond it, a flexible shielding screen (14) surrounding the dielectric body (7) along part of its length from the first end ( 8) of this dielectric body and extending cantilever beyond this first end, and a flexible outer protective sheath (19) arranged opposite the shielding screen (14) and having a length at least equal to that of the shielding screen (14).

Description

The present invention relates to a device for quick connection of a

  shielded cable to unshielded cable. There are known situations in which it is necessary to connect a shielded cable to an unshielded cable. This is particularly the case for connections to airport beacons which include a shielded cable connected to an unshielded cable from a transformer. In the current technique, the connection is ensured by making a cable junction on the site, that is to say by putting

  successively in place the different layers, conductive

  these or dielectrics, which constitute a cable junction. Such an embodiment is incompatible with the imperatives of speed which are required when the cable is intended to supply safety devices whose interruption of operation must be very brief during

  replacing a section of cable.

  The objective of the invention is to design a device for quick connection of a shielded cable to a

unshielded cable.

  In order to achieve this objective, there is proposed according to the invention a device for quick connection of a shielded cable to an unshielded cable, comprising a connector made of conductive material having a first end having a bore for receiving a ferrule shielded cable connection male and a second end having a shape corresponding to an unshielded cable connection end-piece, a dielectric body having a first end surrounding at least the first end of the connector and extending beyond it , a flexible shielding screen surrounding the dielectric body over a part of its length from the first end of this dielectric body and extending in overhang beyond this first end, and an outer protective sheath35 flexible disposed opposite the shielding screen and having a length at least equal to that of the shielding screen. Thus, to make the quick connection of the shielded cable to the unshielded cable, it suffices beforehand to equip the ends of the cables to be connected with their connection ends and to cut the end of the protective sheath of the shielded cable in order to strip a part of the shielding of this cable. Connection tips of both

  cables are then connected to the device connector.

  The flexible shielding screen is connected to the shielding of the shielded cable to form an extension of this shielding surrounding the connection end of the shielded cable. The outer protective sheath surrounds the entire shielding screen and thus forms around this screen an extension of the outer sheath of the shielded cable. The shielding screen

  is then easily connected to ground via

  diary of a flexible conductive braid as usual-

  placed on the shielded cable at the time of

preparation of it.

  Other features and advantages of the

  vention will appear on reading the description which

  follows a particular non-limiting embodiment, in conjunction with the appended figures, among which: - Figure 1 is an exploded sectional view of a quick connection device according to the invention, ready to make the connection a shielded cable fitted with its connection end piece to an unshielded cable also fitted with its connection end piece; - Figure 2 is a view similar to Figure 1, illustrating the connection made; - Figure 3 is a sectional view of another embodiment of a quick connection device according to the invention. In Figure 1, there is shown in exploded view a quick connection device according to the invention, ready to make the connection of a cable end

  shielded 100 at one end of unshielded cable 101.

  The shielded cable 100 comprises from the inside to the outside a conductive core 102, an insulating layer 103, a semiconductor screen 104 and an external protective sheath 105 fitted on its internal face with a conductive shielding sheet. (not visible in the figures). The end of the insulating layer 103 is

  cut so as to strip the end of the conductive core

  trice 102 and a male connection piece 106 is crimped onto the end of the conductive core 102. The end of the outer protective sheath 105 is also cut so as to strip both an end portion of the layer insulator 103 and an end portion of the semiconductor screen 104. The semiconductor screen 104 is itself cut so as to strip part of the end of the insulating layer 103. A conductive plate 107 is inserted between the shielding sheet of

  the outer protective sheath 105 and the semi-screen

  conductor 104 and extends against the semiconductor screen 104 beyond the outer protective sheath 105 so as to be connected by conventional means such as welding to a conductive braid 17 for its connection to ground. The unshielded cable 101 comprises a conductive core 108 surrounded by an insulating sheath 109

  cut at its end to strip part of the end

  mite of the conductive core 108 on which is crimped a male connection tip 110 which is covered as well as the end of the insulating sheath 109 by a protective layer 111. The end of the cable 101 is preferably

factory prepared.

  The quick connection device has been designated by the general reference 1. It comprises a connector 2 made of conductive material. This connector has a first end 3 having a bore 5 for receiving the end piece 106 of the shielded cable 100, and a second end 4 inside which extends the bore 5 for receiving the end piece 110 of the unshielded cable 101.

  A dielectric body 7 surrounds the connector 2.

  This dielectric body has a first end 8 which surrounds the first end 3 of the connector 2 and extends beyond the latter over a cantilevered portion 8.1, and a second end 9 which surrounds the second end 4 of connector 2 and extends beyond it over a cantilevered portion 9.1. The dielectric body 7 has a part 10 opposite the first end

  3 of connector 2, part 11 having a significant diameter

  roughly equal to that of the insulating layer 103 of the shielded cable and extending in the extension of the part 10 through the cantilevered portion 8.1 of the first

  end 8, part 12 opposite the second end

  mity 4 of the conductor 2, and a part 13 having a diameter substantially equal to that of the end of the protective layer 111 of the unshielded cable and extending in the extension of the part 12 inside the portion in

  overhang 9.1 of the second end 9.

  The dielectric body 7 is surrounded over a part of its length by a flexible shielding screen 14 made of conductive material. This screen has a part 15 surrounding the dielectric body 7 on a part of its

  length from the first end 8 of this body.

  The screen 14 also comprises a second part 16 which extends in overhang beyond the first end 8

of the dielectric body 7.

  A flexible external protective sheath 19 is arranged opposite the shielding screen 14. In the configuration of FIG. 1, the sheath 19 comprises a first part 20 which surrounds the entire first part 15 of the shielding screen 14 and a second part 21 which extends the part 20 beyond the free edge of the first end 8 of the dielectric body 7 and which is folded outwardly on the part 20. The length of the entire protective sheath 19 is slightly more

  larger than that of the shield 14.

  The quick connection device according to the invention is produced in the factory and is therefore ready to be

used on a site.

  To make the connection of the cables 100 and 101, in accordance with the representation of FIG. 2, the end of the cable 100 is made to penetrate inside the part 11 of the dielectric body 7 and the end piece 106 is fitted to inside the bore 5 of the connector 2. Similarly, the end piece 110 of the cable 101 is fitted into the bore 5 at the end 4 of the connector 2. The electrical connection between the respective cores 102 and 108 of the two cables 100 and 101

is thus established.

  During the introduction of the connection endpiece 106 of the shielded cable 100 into the connection device, the cantilever portion 16 of the shielding screen 14 comes into contact with the shielding plate 107 so that the continuity shielding is ensured with the

  connection. Part 16 of the shielding screen is now

  bare in support by the second part 21 of the protective sheath 19 which is preferably unfolded after fitting a sealing member 22 such as a tape or a sealant. The part 21 of the protective sheath 19 preferably extends over the external sheath 105 of the shielded cable 100. The flexible conductive braid 17 extends between the sheath

  of the cable 100 and the sheath 19 of the connection device

  ment 1 beyond the sheath 19 for its connection to earth. In Figure 3, there is shown an alternative embodiment of a quick connection device according to the invention. The device is here adapted to ensure the connection of a screened cable similar to the cable 100 previously described in FIGS. 1 and 2 to an unshielded cable 101 this time comprising a female connection end piece 114. This female end piece has a bore 115. The quick connection device comprises, as before, a connector 2 of conductive material having a first end for connection to the shielded cable, which is identical to the first end 3 of connector 2 of the connection device previously described with reference to FIGS. 1 and 2. The connector 2 this time has a second end 34 which forms a male connection end piece of the same diameter as that of the bore 115 of the female connection end 114 of the cable 101. The connection device also comprises a dielectric body 7 which has a first end identical to the first end of the dielectric body 7 previously described with reference to FIGS. 1 and 2 and surrounding the first end 3 of the connector 2, and a second end 9 which extends this time so that the end 34 of the connector 2 extends from the dielectric body 9 for its plugging inside the bore 115 of the end piece 114 of the cable 101. The end 9 has a part 9.1 of smaller diameter which

  engages in the protective sheath 111.

  As previously, the dielectric body 7 is surrounded over a part of its length by a screen

  flexible shielding 4 and an outer protective sheath

  tion 9 similar to the shielding screen and the protective sheath previously described with reference to Figures 1 and 2.

  The invention is not limited to the embodiments

  sation which have just been described by way of examples, but on the contrary encompasses any variant incorporating, with equivalent means, the essential characteristics of the invention. In particular in the embodiment illustrated in FIG. 3, a dielectric body 7 could be provided, the second end of which would surround the second end 34 of the connector 2, having an internal diameter slightly greater than the external diameter of

  the female end piece 114 so that the latter is covered by the dielectric body 7 when it is placed in the connection device.

Claims (2)

  1. Device for quickly connecting a shielded cable (100) to an unshielded cable (101), characterized in that it comprises a connector (2) made of conductive material having a first end (3) having a bore (5 ) receiving a male connection end piece (106) of the shielded cable (100) and a second end (4; 34) having a shape corresponding to a connection end piece (110, 114) of the unshielded cable (101), a dielectric body (7) having a first end (8) surrounding at least the first end (3) of the connector (2) and extending beyond it, a flexible shielding screen (14) surrounding the body dielectric (7) over part of its length at   from the first end (8) of this dielectric body   that and extending in overhang beyond this first end, and a flexible external protective sheath (19) disposed opposite the shielding screen (14) and having a length at least equal to that from the screen of shield (14).   2. Device according to claim 1, character-   risé in that the outer protective sheath (19) has a portion (21) extending beyond the end of the shielding screen (14).