The Vaporizing Of Paraffin for High-Speed Motors
(Electric Ignition Type)

28 VAPOR1ZING OF PARAFFIN. automatically regulated spray action, there had been many introduced from time to time in which an equivalent action was obtained by a hand-controlled obturator located over the spraying nozzle, and connected up in some cases for being operated from the steéring wheel— e.g., the carburettor used in the Peugeot cars of 1904, the Jenatzy of 1905, the Shebler of 1908. and others—so that the mixture could be corrected for more easy start- ing and for steadier and more reliable running at slow speeds, thus providing a more elastic compensating action, and in a very simple manner, too, than possible to obtain by the aid of an automatically regulated supplementary air supply alone. The first carburettors in which the fuel feed and air supply were simultaneously regulated in an automatic manner, in proportion to the volume of explosive mix- ture admitted past the throttle to the motor cylinders, were constructed to obtain this effect by means of an air piston and long needle valve, the movement of which in a vertical clirection, if correctly proportioned, could be made to regulate the spray feed in an approximately exact proportion to the volume of mixture admitted to the motor. The sectional cut, Fig. 25, represents a Chenard-Walker carburettor as made in 1905 on this principle, from which it will be seen that a hollow piston, n, has attached to it a long taper pin e, entering the single nozzle s, and as the top of the hollow piston mixing chamber n is perforated, and as the lower end rests on a series of air ports communicating witli the air supply a, this piston will be caused to lift in proportion to the volume of mixture admitted past the throttle h, the spray induced varying in proportion to the extent the