Metal working – Method of mechanical manufacture – Electrical device making
Patent
1997-05-01
1999-11-16
Arbes, Carl J.
Metal working
Method of mechanical manufacture
Electrical device making
29809, 156 49, 174 731, 140115, H01R 4300
Patent
active
059834943
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a changeover device, preferably for a wire connecting strip device, for the uninterrupted changeover of wires of a telecommunications cable having a plurality of (twin) wires, the wire connecting strip device having, in particular, a wire connecting strip, a base unit and a cover unit, and the wire connecting strip having contact units for the respective connection of the wire of an incoming telecommunications cable and an outgoing telecommunications cable, in order to produce an electrical contact between the respective wires of the incoming and outgoing telecommunications cable, the wire connecting strip having a test opening, open to the outside, for each contact unit. The present invention relates to a process for changing over from an existing damaged or disturbed, and therefore to be exchanged, telecommunications cable, or the wires of the telecommunications cable, to new undisturbed wires, in particular to a new telecommunications cable drawn in in parallel with the existing one in a cable duct between two connecting sleeves, the connection between incoming and outgoing telecommunications cable or wire being carried out at a connecting sleeve by means of a wire connecting strip device.
Wire connecting strips have been used for years for connecting the (twin) wires in telecommunications cable. As a result of cable disturbances and new plans, the previous lead- or plastic-sheathed cables are being exchanged daily. For this reason, more and more work occurs on existing cables which are coupled to one another using wire connecting strips. Even the latest generation of cables, for example PE cables, that is to say with plastic insulation of the copper wires, often have to be exchanged.
DESCRIPTION OF THE PRIOR ART
A plug device for plugging onto the test contacts of a wire connecting strip device for the uninterrupted changeover of telecommunications cables is not known. In the case of the known process, the work is carried out as follows. Firstly it is assumed that a new telecommunications cable has already been drawn into the cable duct between two connecting sleeves to which in each case the new telecommunications cable has to be connected, and is available at the respective connecting sleeve with its stripped, exposed individual wires. The two connecting sleeves are allocated fitters (A+B). Fitter A connects the respective wires to the connecting strip by means of a known wire connecting strip. This is normally carried out by means of a splicing comb. In this case, a wire connecting strip is employed which is known, in the telecommunications sector, by the abbreviation AVL U. Fitter B splices the new cable length into a normal wire connecting strip (AVL). The incoming telecommunications cables which are not to be exchanged in the respective connecting sleeve, and to which the connection has to be made, are set back in the range from about 30 cm to 1.0 m, in order that a supply loop of individual wires is produced, which is in turn needed in order to be able to insert the (twin) wires (DA) into the new AVL or AVL U.
In the case of this process, the existing sleeves, which surround the respective AVL on grounds of tightness, must be removed completely. If the old cable, which is still in operation, is taut and led straight through the cable duct or the ground soldering point, the necessary supply loop must be produced without interruption (telecommunications designation DAV U or AAKv (UPB)) using a twin wire connector, said supply loop being needed for the insertion of the respective wires into the AVL. Using the AVL U on one side, a triangular or parallel circuit (also called a node splice) is produced. In the event of taut cable guidance, the fitter at the other interface must also lengthen the DA as already described. As soon as fitter B has changed over his DA, the triangular circuit can be removed. Both connecting points are to be reclosed, using sleeves, following the production of the connection. The known procedure is very time co
REFERENCES:
patent: 4512828 (1985-04-01), Helm
patent: 4675895 (1987-06-01), Neail et al.
patent: 4817282 (1989-04-01), Markwardt
patent: 5477507 (1995-12-01), Kaplan
Telephone Enginees and Management vol. 89, No. 10, 140-144, May 15, 1985.
Arbes Carl J.
Rosendahl Gabriele
Zimmerman Ria
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