| 摘要 |
Apparatus for passing wire from a reversible supply drum through or past at least one fault detector to a reversible take-up drum and, upon detection of a fault, for automatically decelerating and reversing the movement of the wire comprises reversible means, for instance a split field reversible motor, for driving the wire through the apparatus and a device for integrating the velocity of the wire. A signal generated by the fault detector, when a faulty region of wire passes through or past it, initiates the integrating device and causes the reversible wire-driving means to decelerate the wire and eventually to reverse its direction of movement and to move in the reverse direction until the integrated value of the velocity of the wire is approximately zero. Preferably the wire velocity-integrating device comprises an electrical device for generating a voltage proportional to the linear velocity of the wire being wound on to or from a coil wound on the take-up drum or supply drum and means for integrating the voltage signal generated by the electrical device.
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