Abstract: A vehicle window regulator displaces a window at a faster speed when the window is near its fully closed position than when the window is near its fully open position. The speed is controlled by the meshing of the peripheries of two gears, each periphery defining a varying radius about its axis of rotation. The gear peripheries can be of different shapes, such as circular eccentric, elliptical and logarithmically helical. One of the gears is driven by a constant speed electric motor.

Abstract: A power supplying system for supplying power to a self-driving closure device in which a driving source for driving the closure device for opening and closing an opening moves together with the closure device includes a lead wire having one end connected to a power source and the other end connected to the driving source. The side of the lead wire connected to the power source is supported at a midpoint between the positions of the upper and lower limits of movement of the driving source, while the side of the lead wire connected to the driving source is supported in such a manner as to move together with the driving source. The lead wire is thus made to swing in conjunction with the movement of the driving source so as to supply power to the moving driving source. A guide shaft is provided along the direction of movement of the driving source, and a helical portion formed in the lead wire is extended or shrunk along the guide shaft so as to supply power to the moving driving source.