... by the cable reel cable reel, gear, slip ring collector box, Hysteresis drives, motors, stopper and base. 1 ... by the cable reel cable reel, gear, slip ring collector box, Hysteresis drives, motors, stopper and base composition ... ground when an anchor cable, motor power, carts dragging cables running to the reel drive produces a magnetic field ... scale movement for rail line power and data transmission.