Motor Road Transport For Commercial Purposes
(Liquid Fuel, Steam, Electricity)

 180 MOTOR ROAD TRANSPORT I । j. yl!1 Mechanical Tipping. An instance of a mechanically operated end tipping apparatus is that fitted to a certain make of steam wagon. The process is effected by a drive from the end of a crankshaft through bevel gears to a pair of vertical screwed shafts with. swivel nuts, these working in brackets attached to the body. The movement is controlled by the driver from the cab of the wagon. In another examplé—on a petrol-driven lorry— a drive is taken from the gear box and through suitable gearing to the telescopic screws on either side of the main frame. A special arrangement, whereby adjust- able stops cause an arm to free the bevel driving gear at the top and bottom body position, is provided, and, although the body is trunnioned in such a way that it is tipped from its extreme end, it is claimed that a load of 3 to 4 tons can be dumped in twenty seconds. The body, raised to its maximum position, however, lies at an angle of 60 degrees, which in certain cases may tend to limit the utility of the method. An ingeniously designed patent mechanically operated “ run-back ” on a steam wagon offers the third example of this class. The whole of the operation of raising or lowering the body is performed by the engine, all that it is necessary for the driver to do is to work a friction-clutch pedal. Spigots, attached to the front and to the back of the body, engage auto- matically with recessed brackets so that rigidity when travelling may be assured. On. the underside of the body are fitted brackets, carrying rollers, which run in guide-channels, fitted upon the top of the chassis frame. Between the top channels is placed a horizontal screw, fitted with a nut, to which is attached two levers, and the other ends of these hold the underside of the body. From this it will be seen how the