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

34 VAPORIZING OF PARAFFIN. to either correspond with the fluct uat ions at the supply end h, or be modified by the pressure acting from the outside air inlet a, through the duet u, according to the adjustment of the plug regulator, as from m to u. The point is that once a carburettor of this type has been properly proportioned and adj usted to the required running conditions, its action will be independent of moving parts, other than the float, which is common to all. In the Ware double-jet carburettor (Fig. 21), which also works on the variable pressure principle, the level of the petrol supply will rise to nearly the maximum height of that in the float cistern t, when running dead slow, and to the highest possible level just before starting, when the spray will be drawn up the nozzle s1 from the well below supplied by the nozzle s, the mixture regulator r being meanwhile nearly closed, thus causing a great suction effeet by way of the central tube ; but as the combined mixture valve and throttle r is openeel to obtain a greater power or speed, the level of the petrol in this tube will be exhausted below the nozzle s1, when air will be drawn down between the outer and inner tubes subtended from the cistern cover partition, and enter the well space covering the primary nozzle s, and assist in carrying up the spray to the space above the neck of the throttle regulator h, where it will mix with the main supply of air entering at a. Thus it will be seen that the level of the spray feed supplied by the primary nozzle varies from s to the line l, l, according to the throttle opening and volume of explosive mixture supplied to the motor; also, as in the single-jet carburettor just clescribed (Fig. 28), there is neither supplementary nor