Popular Science Monthly 



773 



Operation of the Starter 



When the pedal Mis pushed forward, the 

 left arm with the catch F slides down the 

 incline of A'', Fig. 5, and is pulled toward 

 the toothed band by the spring E, Fig. 2. 

 The catch engages in the toothed band and 

 the pedal M is given a quick downward 

 push which starts the engine. When the 

 foot is taken off the pedal it is pulled back 

 by the spring C, Fig. 4, and as soon as it 

 starts back the left arm slides up the incline 

 which keeps the catch F away from the 

 toothed band. The arm in this position is 

 shown at P, Fig. 5. This makes it possible 

 to start the engine with the rear wheel on 

 the ground, when the clutch is thrown out 

 of action. 



The Footboards 



The pedals being removed, it is necessary 

 to provide some support for the feet. To 

 do this, footboards are supplied as follows: 

 A bent bracket is made as shown in Fig. 8. 

 The pieces Q are made of 3^-in. square iron, 

 73/2 ir*- long, flattened at the upper ends 

 for holes. The piece R is made of iron 

 1 1 3^ in. long, I in. wide and ^ in. thick, 

 and is riveted to the pieces Q as shown 

 in the illustration. 



The piece R should extend about J^ in. 

 at both ends over the pieces Q so as to 

 prevent the hinge of the footboard from 

 turning down. The hinge is shown in 

 detail at 5. The rear bracket is made of 

 the same material as the front. The pieces 

 T and U are fastened together with small 

 bolts at the ends and stove bolts are used 

 on each side of the frame at V. A split 

 wood block W is made to fit in the frame as 

 shown. The front of the bracket on each 

 end will need to be twisted so that its 

 surface will be in the same angle as the 

 footboards. 



The general dimensions and shape of the 

 footboards are given in Fig, 9. They 

 are made of hard wood and a rubber cut 

 to the same size and glued to their surfaces. 

 To make a neat finish thin strips of metal 

 are cut about 3/16 in. wider than the 

 thickness of the board and the rubber, and 

 then tacked around the edges. The pro- 

 jecting edge of the metal strip above the 

 board's surface is turned over and on to the 

 rubber top. The front boards are then 

 fastened to the hinge wing with small bolts. 

 The rubber is put on after the boards are 

 bolted to the hinge wings. The front 

 bracket is fastened to the frame with the 

 same bolt that holds the engine, as shown 

 in Fig. 10 and 11. 



The Foot Brake 



The reconstruction of the crank-shaft and 

 clutch leaves the machine without a brake. 

 The brake, which is operated with one foot, 

 is made as follows: The rear sprocket on 

 the right side is removed. A lever is then 

 attached in place of the sprocket to take 

 the end of the brake-rod. The brake-pedal 

 is shown in Fig. 12. The sleeve X is 

 fastened under the engine in front of the 

 square bottom, as shown in Fig. 11. The 

 rod is made of machine steel. The brake- 

 rod should be about 25% in. long. A small 

 hole is cut in the front end of the chain 

 guard for the brake-rod to pass through. 

 The illustration clearly shows the con- 

 struction of the brake parts. The lever 

 Y may appear to be small, but if the brakes 

 work right it requires very little pressure to 

 slide the wheel. 



The Foot- Clutch 



Another improvement, which is not in- 

 dispensable but is ver>'^ desirable, is a foot- 

 clutch control. The foot-lever for this is 

 shown in Fig. 13, and is applied as shown 

 in Fig. 10. As can be seen, it is attached by 

 the same bolt as the regular clutch-lever. 

 The corners on the outer end of the bolt 

 are ground off and the sleeve of the foot- 

 lever is put on over this. The rod from 

 the clutch runs directly to the control-lever 

 and another rod runs to the regular band 

 lever. A collar Z is put on the foot-lever 

 control rod. 



By using the foot-lever the clutch can 

 be thrown either in or out; but with the 

 hand-lever it can only be thrown out, as 

 can be seen by referring to the illustration. 

 These added features to an old style 

 motorcycle have been in use for two years 

 and have given entire satisfaction. 



Iron and Steel Made Rust-Proof 

 with Chemicals 



IF iron is placed in a weak solution of 

 phosphoric acid, a coat of insoluble 

 ferrous phosphate is formed on it, which 

 an oxidizing agent makes black and basic. 

 If there is more acid phosphate, salts of 

 calcium, magnesium, barium, or other 

 alkali earth metal in solution, it will react 

 much less violently than when free phos- 

 phoric acid is present. By using hydrated 

 manganic oxide and air as oxidizing agents 

 in the presence of this acid phosphate, a 

 layer of black ferroso-ferric phosphate is 

 formed of suitable thickness, rendering 

 the metal rust-proof. 



