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

PETROL CARBURETTORS. 37 of petrol motors in particular, indicate a more and more pronounced tendency for continual aclvance, but at the same time a capacity for instant flexibility of action, combined with an ability for running reliably at speeds ranging from one-fifth of normal, to meet modern require- ments in high-class motor cars. In the attainment of this result the ad vant age of a pilot or auxiliary jet was early recognized; the Brooke double-jet carburettor of 1904, for instance, was fitted with a pilot jet in addi- tion to a diapliragm controlled sleeve regulator d, v H Fig. 32. Fig. 33. Figs. 32 and 33.—Typical Constant Mixture Carburettors with Combined Action of Automatic Air and Spray Control. (vide Fig. 32), for the purpose of admitting a supple- mentary supply of air to compensate for the depression around the spraying nozzle, as the result of open throttle and inereased volume of mixture supplied to the motor, as by the governor-controlled piston valve h, wheri exceeding a certain predeterniined limit. The action of this carburettor, as will be recognised, so far resembles