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

PETROL CARBURETTORS. 35 compensating valve of any kind required in this par- ticularly unique form of carburettor, and further, it has the additional advantage of a central feed, and is, there- fore; uninfluenced by road camber or gradient. In the well-known Zenith carburettor (Figs. 29 to 31), which also works on the principle of a varying level in one of the two spraying nozzles, s1, <s2, there is a third or starting nozzle s3. This starting nozzle s3, which is by the way the equivalent of the nozzle s1 in Fig. 20, is shown in action in section (Fig. 31) with. the throttle li Fig. 29. Fig. 30. Fig. 31. Figs. 29 to 31.-—Sectional Diagrams showing the Eft'ect of Fuel Level in a Multiple- jet Carburettor with different Degrees of Throttle Opening. closed except for a sliglit air gap opposite the nozzle ; a jet can, therefore, be drawn from the maximum level with a considerable suction effeet when pulling over the starting handle, which is import ant. As a result of further opening the throttle, the two nozzles s, s1 will be brought into action by the choke-tube b, the inner one of which is fed at constant level direct from the float cistern, and the other from the well l, which is in