THE WORLD'S ADVANCE 



103 



and 2 show the details of the steering 

 knuckles. The front axle carries, on its 

 top and bottom, bars of cold rolled steel 

 y?. inch thick, which extend beyond the 

 ends of the wooden piece to form the 

 bearings for the knuckles which carry 

 the wheels. These knuckles are made 

 up of one-inch wrought iron pipe tees, 

 lined with nipples, and fitted with the 

 extensions of the axles of the wheels. 

 The steering gear proper is shown in 

 Fig. 2, which discloses the method by 

 which the steering wheel operates a drum 

 upon which is wound the steel cable con- 

 necting with the steering knuckles. The 

 arrangement is similar to that employed 

 with the tiller of a boat. The wheels are 

 maintained parallel through the agency 

 of the distance rod, which links the ex- 

 tensions of the steering knuckles to- 

 gether. 



Power Plant and Drive 



The use of a standard motorcycle en- 

 gine of from three to seven horsepower 

 is contemplated. The method of mount- 

 ing shown is purely suggestive, as there 

 are so many makes of engines on the 

 market that it is difficult to present any 

 one mounting that would serve for all. 

 The plan suggested is merely to run 

 studs through the lugs on the crankcase, 

 bolting down these studs to the central 

 struts of the chassis in the manner 

 shown in the side elevation and plan 

 views, Plates III and IV. 



The pulley supplied with the motor 

 will undoubtedly serve the purpose, and 

 upon its size and the power of the engine 

 will depend the diameter of the inter- 

 mediate or countershaft pulley. The re- 

 duction shown in our drawing is about 

 2:1, this being suitable for the small, 

 single-cylinder motors so commonly 

 used. 



The countershaft requires some atten- 

 tion. In Plate IV the reader will notice 

 that this member is carried in a series of 

 bearings made from pieces of pipe, into 

 the ends of which standard annular ball 

 bearings are fitted. These bearings may 

 readily be purchased and it is compara- 

 tively a simple matter to fit them to the 

 supporting members. The pipe is se- 

 cured to the struts by means of strap- 



irons bolted on. The countershaft car- 

 ries the central pulley, taking its belt 

 from the engine shaft and, also, at both 

 ends carries the drive pulleys from which 

 the belts pass to the rear wheels. The 

 shaft extends beyond the pulley on one 

 end in order that a starting crank with 

 ratchet may be added if desired. This 

 crank is, of course, removable. 



In the center of the countershaft 

 housing will be noticed the brake pedal 

 which pulls the slender rod extending 

 back to the brake bar. This bar is slid- 

 ably arranged on the struts in order that 

 it may be drawn forward to tighten the 

 steel cables which pass over pulleys on 

 the drive wheels. The other ends of 

 these cables are fastened to the ends of 

 a cross piece which may be seen in Plate 

 III. 



Immediately in the rear of the coun- 

 tershaft may be seen the belt idler and 

 its control mechanism. This consists of 

 a shaft carried in two pieces of pipe, 

 which are fastened with strap-irons to 

 the struts, a long lever by means of which 

 the shaft is turned and, at either 

 end of the shaft, an arm carrying at its 

 extremity an idler pulley. The parts of 

 the idler mechanism may be gotten out 

 in castings quite readily, as the pattern 

 work is comparatively simple. The de- 

 tails of the device are very clearly shown 

 in Plate VI, Fig. 5. 



To pass now to the rear wheels and 

 their pulleys. If the builder can secure 

 two standard motorcycle wheels with 

 pulleys attached, well and good, but if 

 the substitute must needs be a bicycle 

 wheel, an improvised pulley may need 

 some thought. Perhaps the simplest way 

 out of the difficulty is to build up a pulley 

 from some good, dry, hard wood in three 

 thicknesses, crossing the grain three 

 ways. Instead of glue, heavy varnish 

 may be liberally used between the layers 

 of wood, which should be about % inch 

 thick. The final holding with a series 

 of rivets spaced a few inches apart and 

 near the periphery will prepare the pulley 

 for turning. The center is taken out as 

 the pulley is fastened to the rim of the 

 wheel by means of straps of steel. The 

 final treatment of the pulley should be a 

 liberal impregnation with some good 



