Optical waveguides – Accessories – Splice box and surplus fiber storage/trays/organizers/ carriers
Patent
1993-12-29
1995-10-10
Healy, Brian
Optical waveguides
Accessories
Splice box and surplus fiber storage/trays/organizers/ carriers
385134, 385114, 385 55, 385 59, G02B 636
Patent
active
054577640
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns a diffusing device with extractable semiconnectors, integrated in a plastic card, for facilitating the termination of optical fiber ribbon cables.
At present, diffusors are known for central exchangers which divide a ribbon of four optical fibers, coming from the net side, into single fibers abutting to connectors SC-2. These 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, containing rigidly fixed semiconnectors, which are available only if the card is completely disassembled. Thus, this card system has an evident negative aspect in use.
SUMMARY OF THE INVENTION
It is the aim of the present invention to provide a compact diffusor device for the termination of fiber optic ribbon cables, wherein the device is functional, simple and cheap.
The aim set forth is reached by means of the diffusor device according to the present invention, comprising extractable semiconnectors which are integrated in a plastic card, for individually connecting all fibers on the net side with those on the apparatus side by means of a semiconnector MT4 and four semiconnectors SC-2. In this manner, one optical fiber ribbon is divided into four independent optical fibers.
The main advantages of the compact diffusor device according to the present invention are: modifications; because it is possible to perform any cleaning operations on all semiconnectors and sleeves outside the card, by means of simply unscrewing two screws, without particular care or special procedures.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention is described in more detail hereinbelow according to the enclosed drawings in which a preferred embodiment is shown.
FIGS. 1 and 2, respectively, show the plant and the lateral views of a diffusor device with extractable semiconnectors, integrated in a plastic card, for the termination of fiber optic ribbon cables.
FIG. 3 shows the view A--A and a partial cross section.
FIGS. 4, 5 and 7, respectively, show the plant views of the three levels L1, L2 and L3.
FIGS. 6 and 8, respectively, show sections B--B and C--C.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The figures show a diffusor device with extractable semiconnectors, integrated in a plastic card, for the termination of fiber optic ribbon cables. The diffusor device includes: ribbon, an optical coupler and an area for dividing the ribbon into the single fibers; the optical fibers;
Relating now to the details shown in the figures, the diffusing device according to the present invention includes a card which connects with a semiconnector 9 MT4, of the push-on type. The card includes four semiconnectors 8, SC-2, which connect with a four-way sleeve 5, and the card may further contain an MT or fusion optical coupler 17. An additional four semiconnectors SC-2 with a corresponding four-way sleeve may be provided at the other side of the card, as shown in FIGS. 4 and 5.
The device according to the present invention allows a very easy extraction of the optical semiconnectors 8 from the card for cleaning thereof before the connecting phase. Access to the semiconnectors 8 is accomplished by opening the blocking system consisting of a restriction element 6 which fixes sleeve 5 to the base of the card by means of screws 7 of the kind which may be manually extracted or which may be extracted by means of a screw-driver.
A main feature of the device according to the present invention consists in the system 11 for blocking the reinforced small tubes for the protection of the optical fibers. This blocking system 11 will carry longitudinal stresses during the phase of traction of the semiconnectors 8.
With respect to the structure of the device according to the present invention: extension of the ribbon 16 and the single fibers 18 and 19, as shown in FIG. 4; by the small separating tube 3, and the separating tube 3 provides a sliding plane in the phase of extracting the semiconnectors SC-
REFERENCES:
patent: 4765709 (1988-08-01), Suillerot et al.
patent: 4976510 (1990-11-01), Davila et al.
patent: 5206927 (1993-04-01), Finzel et al.
patent: 5212761 (1993-05-01), Petrunia
patent: 5235665 (1993-10-01), Marchesi et al.
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