Patent GB-190215502-A (GB)
Title: Improvements in or relating to Motor Road Vehicles.
Inventor: SCOTT GEORGE WILLIAM DENNISTOU
Filed: 1902-07-11
Granted: 1903-07-09
Abstract: 15,502. Scott, G. W. D. July 11. Road-vehicle motors; r a d i a l - cylinder engines; valves and valve gear. - The chief object is to provide a " motor - axle '' for driving motor vehicles, i.e., a combined motor and casing g forming a hollow non- rotating axle, on the ends of which the driving-wheels of the vehicle are revolubly mounted and driven from the motor. The motor-axle is fixed in bearings carried by the springs, so that, on disconnecting the pipes or conductors for the motive agent and the mechanism for transmitting controlling move. ments, it may be removed entire, and, in the case of motor drays, additional motor-axles can be fitted if the work to be done requires it. Any suitable motive-power fluid may be employed, but the invention is shown in connection with steam power. Fig. 1 shows a longitudinal vertical section through the motor-axle, Fig. 2 a part plan thereof with the distributing valve and valve casing removed, and Fig. 3 shows a vertical crosssection. The motor casing A is provided on each side with lateral extensions or sleeves B, thus forming a hollow axle. A four-cylinder motor drives a crank shaft E in the casing, whence, through suitable toothed reducing and differential gearing and shafts D, the vehicle wheels C, which are mounted revolubly on the sleeves B, are driven. The shaft D drives the wheels through caps c. The shafts D are driven from the crank shaft E through epicyclic gearing, comprising on each side a planet-wheel carrier and sleeve G interposed between the stationary wheel F and the driving-pinion I. A detent f is provided for fixing the wheel F on one side, and differential action is allowed when required by a geared countershaft J, shown separately in Fig. 5, by which the two wheels F are connected through the pinions h, h<1>, h<2> so that they can turn in opposite directions in order to permit one road wheel to overrun the other when traversing a curved path. The motor vehicle, when desired, may be employed as a portable engine, by locking the differential gear, taking off one of the caps c, and substituting a longer shaft with a belt driving-pulley for the shaft D. The motive fluid is distributed to all four cylinders by a flat valve N, of which the ported face is shown in Fig. 10, sliding in the direction of the slot m<1> on a block m<2>, which is pivoted at m<3> so as to allow the valve at the same time to oscillate over the steam ports n and exhaust ports n<1>. The motion of the valve is derived from an eccentric k<3> embraced by an eye m, formed integrally with the valve. The eccentric is rotated from the crank shaft by bevel gearing through shafts K and L. It is mounted so that, when it is desired to reverse the engine, it can be caused to slide across the face of the disc k, Fig. 6, by a relative angular movement of the shaft L to the disc k, the traversing movement being effected by an eccentric pin k<3>. The relative angular movement is produced through epicyclic gearing between the disc k and shaft L by turning through a small angle the shaft M. The valve shown is for a simple engine ; in the Specification, a modification for compound working is also shown. Balancing is provided for by a diaphragm arranged to exert the requisite pressure on the back of the valve, a ball bearing being interposed at m<6>.