Drives for overhead haulage vehicles

Claim 1

A LOCOMOTIVE ADAPTED TO BE SUSPENDED FROM AN OVERHEAD TRACK, SAID LOMOTIVE COMPRISING A RIGID FRAME HAVING TRACK ENGAGING WHEELS RELATIVELY POSITIONED FOR ENGAGING AGAINST OPPOSITE SIDES OF THE SUPPORT TRACK, BEARING BLOCKS CARRIED BY AND SPACED APART TRANSVERSELY OF SAID FRAME, MEANS SUPPORTING SAID BLOCKS ON THE FRAME TO HAVE UP AND DOWN MOVEMENT RELATIVE THERETO, ONE OF SAID TRACK ENGAGING WHEELS BEING A DRIVE WHEEL WHICH IS OPERATIVELY CONNECTED WITH SAID BEARING BLOCKS FOR ROTATION, AN ELONGATE DRAW BAR EXTENDING LONGITUDINALLY ALONG ONE SIDE OF SAID FRAME, MEANS ON THE FRAME, SUPPORTING SAID DRAW BAR FOR RECIPROCAL MOVEMENT, THE DRAW BAR BEING SUBSTANTIALLY PERPENDICULAR TO THE ROTATIONAL AXIS OF SAID WHEEL AND BEING BELOW SAID AXIS, SAID OPERATIVE CONNECTIION OF THE DRIVE WHEEL WITH THE BEARING BLOCKS INCLUDING SUPPORT MEANS FOR THE DRIVE WHEEL, A PAIR OF RELATIVELY LONG RIDIG LINKS EXTENDING IN DIVERGENT RELATION DOWNWARDLY TOWARD SAID DRAW BAR FROM SAID PIVOTALLY CONNECTED AT THEIR UPPER ENDS TO ONE OF SAID SUPPORT MEANS TO SWING IN A VERTICAL PLANE SUBSTANTIALLY PARALLELING THE DRAW BAR, MEANS COUPLING THE LOWER END OF SAID LINKS WITH SAID DRAW BAR FOR IMPARTING AN UPWARD THRUST TO ONE LINK UPON LONGITUDINAL MOVEMENT OF THE DRAW BAR IN ONE DIRECTION, AND A DRIVE MEANS FOR SAID DRIVE WHEEL.