A DISTRIBUTION DEVICE WITH DEMOUNTABLE CONNECTORS, FOR THE TERMINATION OF OPTICAL RIBBON CABLES

Abstract: The compact distribution device for ribbon optic fibres allows to individually connect all fibres on the network side with those of the apparatus side by means of a semiconnector MT4 and four semiconnectors SC-2, thus splitting one optic fibre ribbon into four single fibres.

Description: "A DISTRIBUTION DEVICE WITH DEMOUNTABLE CONNECTORS, FOR THE TERMINATION OF OPTICAL RIBBON CABLES" The present invention concens a diffusing device with extractable semiconnectors, integrated in an optic pla¬ stic card for the termination of optic ribbon cables. At present, diffusors are known for central exchangers that part a ribbon of four optic fibres, coming from the net side, into single fibres abutting to connectors SC-2. Said diffusors are extremely expensive due to the complex realization process, and furthermore they are not compact. A card provided for the same purpose is also known, con¬ taining the rigidly fix semiconnectors, so as to be a- vailable only if the same card is completely disassembl¬ ed, thus implying an evident negativity in use. It is the aim of the present invention to realize a com¬ pact diffusor device for the termination of optic ribbon cables, being functional, easy and cheap. The aim set forth is reached by means of the diffusor device according to the present invention, comprising extractable semiconnectors and being integrated in a plastic card, for individually connecting all fibres on • • •/ • • « the net side with those on the apparatus side by means of a semiconnector MT4 and four semiconnectors SC-2, thus parting one optic fibre ribbon into four optic f bres. The main advantages of the compact diffusor device ac¬ cording to the present invention are: - low cost; - easiness in installation in all existing frames and exchangers, with negligible modifications; - small spaces and compactness; - easiness for an eventual replacement but, most of all, for managing, as it is possible to perform any clean¬ ing operations on all semiconnectors and sleeves out- side the card, by means of a simple unscrewing of two screws, without particular cares or procedures. The present invention is described more in detail here- inbelow according to the enclosed drawings in which a preferred embodiment in shown. Figures 1 and 2 respectively show the plant and the la¬ teral view of a diffusor device with extractable semi¬ connectors, integrated in a plastic card, for the termi- nation of optic ribbon cables. Figure 3 shows the view A-A and a partial cross section. • ••/ • * • Figures 4, 5 and 7 respectively show the plant views of the three levels LI, L2 and L3. Figures 6 and 8 respectively show sections B-B and C-C. The figures show a diffusor device with extractable se¬ miconnectors, integrated in a plastic card, for the ter¬ mination of optic ribbon cables, comprising: - a body 1 for containing, at the first level, the ex- tension of the optic fibre ribbon, the coupler and the unravelling of the fibres; - a body 2 for the upper closing; - a separator 3 of the second level; - a separator 4 of the third level; - a four-way sleeve 5 for the connectors SC-2; - a small block 6 for blocking the four-way sleeve; - a screw 7 for blocking the small block 6; - a semiconnector 8 SC-2; - a connector 9 MT4, push-on; - a support 10 for a connector MT4 push-on; - a blocking system 11 for the reinforced small tubes for the protection of the optic fibre; - a door 12 for the access to the connector MT4 push-on; - an indicator section 13; - a system 14 for containing the optic fibre ribbon; - a system 15 for fixing the card; - a ribbon 16 with four optic fibres (Ribbon); - an optic coupler 17; • « • / • • • - a single fibre 18; - a single fibre 19 protected by a small reinforced tu¬ be. Relating now to the details shown in the figures, the diffusing device according to the present invention houses in a card a semiconnector MT4, of the push-on kind, and four semiconnectors 8, SC-2, headed to a four- way sleeve 5, and may further contain an MT or fusion optic coupler 17 and consequently further four semicon¬ nectors SC-2 with the relative sleeve. The device according to the present invention allows a very oasy extraction of the optic semiconnectors 8 from the card for performing the cleaning thereof before the connecting phase, following to the opening of the block¬ ing system consisting in a striction element 6 that makes sleeve 5 adhere to the base of said card by means of screws 20 of the kind of manual extraction or by means of a screw-driver. A main feature of the device according to the present invention consists in said system 11 for blocking the reinforced small tubes for the protection of the optic fibres, that allows to carry eventual longitudinal stresses during the phase of traction of the semicon¬ nectors 8. • • • / • • • For what concerns the structure of the device according to the present invention: - In the first level LI all the housings are provided for the whole extension of the ribbon 16 or the single fibres 18 and 19; - in the second level L2 the fibres already protected by the small separting tube 3 are provided, for realizing a sliding plane in the phase of extraction of semicon¬ nectors SC-2; on the same plane, shape 23 is obtained that replaced a stop for the maximum extension of se¬ miconductors .Cl on the apparatus side, still assuring the minimum curving radius; - in the third level L3 the semiconnectors C2 of the measuring side and net control are brought, in a way similar to the precedent level. The device according to the present invention has such a structure that in all obliged passages the minimum curv¬ ing radius of said optic fibres is assured in the card for the optic fibres in a measure higher than requested. From inlet Al, the ribbon 16 will be wound twice in the round groove 21 for entering into the optic coupler 17 from which two fibres get out that, in turn, are wound twice in the second circular groove 22 from which they get out and, after a further turn in said groove 21, reach the system 11 for blocking the reinforced small tubes entering into the same, so as to determine, from now on and untl the end of the connection on SC-2 8, the protection of said fibres. In a possible variant, the device according to the pre¬ sent invention provides that the optic fibre ribbon 16 will be connectorized, at the outlet from the circular groove 21, by means of a multiple connector MT4, instead of the mentioned optic coupler 17, from which one single ribbon is coming out that, in turn, runs twice through the groove 22 and once through groove 21 and in this phase the four optic fibres are parted from one another. Further, said four fibres of the ribbon are introduced into ".he blocking system 11 as already described. In this case, the card has an inlet consisting, instead of connector 9, of a protection tube containing the fibre ribbon, and the apparatus side will have only one end of four SC-2. In a further variant, the device according to the presen invention provides the inlet possibility directly from the net side, of the optic fibre ribbon, thus connected to the diffusor or by means of a multiple connector MT4 or by means of a fusion joint. • ••/ •••

Claims: C LAI MS 1. A diffusing device for the termination of optic ribbon cables, comprising extractable semiconnectors and integrated in a plastic card, for individually connect¬ ing all fibres of the net side with those of the appa¬ ratus side, by means of a semiconnector MT4 and four se¬ miconnectors SC-2, thus parting one optic fibre ribbon into r. o r single fibres, characterized in a three level. structure, in which: - in the first level LI all the housings are provided for the whole extension of the ribbon (16) or the single fibres (18) and (19); - in the second level L2 the fibres already protected by the small separting tube (3) are provided, for realizing a sliding plane in the phase of extraction of semicon¬ nectors SC-2; on the same plane, shape (23) is obtained that replaced a stop for the maximum extension of se¬ miconductors (Cl) on the apparatus side, still assuring the minimum curving radius; - in third level L3 the semiconnectors (C2) of the measuring side and net control are brought, in a way similar to the precedent level. 2. A device according to claim 1, characterized in the following components: - a body (1) for containing, at the first level, the ex- • ••/ • • • ten-.ion of the optic fibre ribbon, the coupler and the unr.Lvelling of the fibres; - a body (2) for the upper closing; - a separator (3) of the second level; - a separator (4) of the third level; - a four-way sleeve (5) for the connectors SC-2; - a small block (6) for blocking the four-way sleeve; - a screw (7) for blocking the small block (6); - a semiconnector (8) SC-2; - a connector (9) MT4, push-on; - a support (10) for a connector MT4 push-on; - a blocking system (11) for the reinforced small tubes for the protection of the optic fibre; - a door (12) for the access to the connector MT4 push-on; - an indicator section (13); - a system (14) for containing the optic fibre ribbon; - a system (15) for fixing the card; - a ribbon (16) with four optic fibres (Ribbon); - an optic coupler (17); - a single fibre (18); - a single fibre (19) protected by a small reinforced tu¬ be. 3. A diffusing device according to claim 2, characte- rized in that it houses in one card a semiconnector MT4 (9) of the push-on kind, and four semiconnectors (8), SC-2, headed to a four-way sleeve (5). • • •/ • • • 4. \ device according to claims 1-2, characterized in that t he ribbon (16) is wound twice in the circular groove (21) and then enters into the optic coupler (17) from which two fibres come out which, in turn, are twice wound in a second circular groove (22) from which they come out and, after a further turn in groove (21), reach the system (11) for blocking the reinforced small tubes entering in the same so as to determine, from now on un¬ til the end of the connection on SC-2 (8), the protec- tion of said fibres. 5. device according to claims 1-2, characterized in that .he optic fibre ribbon (16) will be connectorized, at the outlet from circular groove (21), by means of a multiple connector MT4 instead of said optic coupler (17), from which the sole ribbon comes out which, in turn, runs twice through the groobe (22) and then once through groove (21) and in this phase the four optic fibres are parted from one another and introduced into the blocking system (11). 6. A device according to claims 1, 2 and 5, characte¬ rized in that it has an inlet consisting of a protection tube containind the fibre ribbon instead of connector (9), while the apparatus side has a single end of four connectors SC-2. 7. A device according to claims 1-2, characterized in • • •/ • • • the blocking system consisting of a striction element (6) that makes sleeve (5) adhere to the base of said card by means of screws (20) of the kind of manual ex¬ traction or by means of a screw-driver, so as to allow the extraction of the optic se iconectors of the card for the cleaning thereof before use. 8. A devie according to claims 1-2, characterized in the system (11) for blocking the small reinforced tubes far the protection of the optic fibre that allows to face eventual longitudinal stresses during the traction phase of semiconnectors (8). 9. A device according to claims 1-2, characterized in the inlet directly from the net side, of the optic fibre ribbon, thus connected to the diffusor or by means of a multiple connector MT4 of by means of a fusion joint. /...

Inventors: EDERA EGISTO, EDERA, EGISTO
Applicants: EDERA EGISTO, EDERA, EGISTO
Application year: 1992
Main classification: G02B6
IPC codes: G02B6