The current invention is based on the object of providing a cable of the kind mentioned in the beginning with which it is possible to permit an in-situ measurement of the tensile forces acting on the cable and, on the idea of the measured values, control the winding speed with which the cable is wound up onto and unwound from a drum during operation. The constantly changing tensile forces performing on the cable have the impact of adjusting the space between the conductors of the wires 1a and 1b. If current is flowing by the conductors, i.e. they are connected to a voltage supply, the capacitance of the pair of wires 1a, 1b also adjustments. The altering of the capacitance is measured and is used as a managed variable for controlling the winding pace of the winding drum. One of many causes of these tensile forces is the dead weight of the cable that is wound up onto and unwound from a drum positioned above the spreader. In the course of the transferring up and down of the hoist, the cable is constantly wound up onto and unwound from the drum or placed over a hopper and taken up again.

To solve the problems described, it's proposed within the case of a drum-windable cable with stranding parts stranded in not less than two stranding layers, during which the first stranding layer is organized round a supporting component with a steel cable, that at least one stranding layer is supplied with stranding components that comprise a braided lead cord, an extruded polyamide- or polyester-based sheathing surrounding the lead cord and aramid-based mostly rovings arranged between the lead cord and the sheathing in such a method that they run in longitudinally. FIG. 1 exhibits a drum-windable cable which has a central component 1, round which a first layer 2 of stranding parts 2a is stranded. The length of lay of the wires 1a, 1b and of the interstitial fillings 1c, 1d is between 20 and forty D, where D is the skin diameter of the stranding ingredient comprising the wires 1a, 1b and the interstitial fillings 1c, 1d. Additionally it is necessary that the layer if is compressible. The size of lay of the person stranding components is approximately 8 instances the stranding diameter.

It's preferred, however, for two tapings product of polyethylene terephthalate to be applied, with reverse instructions of lay. Between the layer 2 and the layer 3 there is a separating layer 5 of a spunbonded fabric fabricated from polyethylene terephthalate. Arranged over the layer 3 there is a least one taping 6, likewise made from polyethylene terephthalate. The spunbonded fabrics serve the aim of creating it possible for the respectively adjacent layers to slide with respect to each other. FIG. 2 shows a aspect minimize-away view of parts 1a and 1b from FIG. 1, in accordance with one embodiment. In the case of the cable described, the stranding components 2a and 3a serve for controlling the arms of the spreader. The central element 1 comprises a pair of wires 1a, 1b, which is stranded together with two interstitial fillings 1c, 1d. The stranding ingredient formed in this manner is surrounded by a layer 1e of spunbonded polyethylene-terephthalate fabric. Each stranding element 2a and 3a has-as known per se-a not specifically designated, centrally arranged electrical conductor, for example a positive-wired copper conductor, and a not specifically designated insulation, for example based mostly on ethylene-propylene rubber.

With choice, the buffer tube 12 consists of an ethylene-propylene rubber. The taping 6 is sheathed by an internal jacket 7 made from an extruded rubber mixture, inside the wall of which a braid 8 of polyester filaments is offered as a safety against torsion. EP zero 178 249 B1 discloses a flexible electric control cable wherein quite a few bundles of wires are stranded on a core component formed as a supporting factor, wherein every bundle of wires comprises a core factor with wires stranded on it and during which the core formed by the supporting factor and the wires is surrounded with a braiding and a plastic jacket. The core aspect of every bundle of wires comprises a braided lead cord, and braided lead cords are likewise organized within the outer interstices of the core. To improve the running of the cable under the impact of wind forces, and consequently make it attainable for such a cable to be used as a spreader cable, the core element formed as a supporting factor comprises an meeting of braided lead cords on which a braid of tension-resistant plastic filaments is applied. The braided lead cords result in a rise within the dead weight without noticeably increasing its movement resistance within the transverse course or reducing its flexibility.