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

PETROL CARBURETTORS. 9 pump, the principal objection to which is the difficulty of avoiding leakage past the piunger giand; this draw- back, however, can be remedied in some degree by using a superstratum of glycerine, and can be avoided alto- gether by using a diapliragm pump. In operation, the injection feed from a pump carburettor can be regulated Fig. 1.—Spray Injection Piunger Carburettor with Mechanically Actuated Valves. either by varying the stroke of the piunger or by a cut- out action; 'an example of each of these methodsis shown in Figs. 1 and 2. In the first—of Continental design— one of the difficulties of maintaining an accurate feed is obviated in great measure by two mechanically actuated valves v, one of which is held closed to the spraying chamber by a stift' spring, except when, by the action of