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

ROAD CAR AND TRACTOR MOTORS. 115 been got over; the burner jet projects horizontally against a perforated disc, whence the vapour issues together with sufficient air to produce a smokeless blue fiame in the manner shown. From the number and variety of methods t hat have been evolved for vaporizing paraffin for running motors of the high-speed electric ignition type, it would seem that one of them must sooner or later show up to suffi- cient all-round advantage to take the lead ; but, so far, it cannot be said there is any line, indicating the final solution of this really difficult problem, yet in sight. Before, however, concluding the study of this very interesting and elusive subject, mention should be made of a vaporizing system that takes a wide departure from the well-trodden track, and which from the following description will be seen to resemble in some measure, perhaps, the reactions taking place in an ordinary gas- producer. Electric Vaporizer.—In this, known as the Southey paraffin vaporizer, illustrated by Figs. 87 and 88, the com- bustion of part of the fuel sprayed into a chamber is claimed to have advantages both of the exhaust- and flame- heated vaporizer, as being independent of an externally applied fiame as well as petrol. The essential features of this apparatus—fulfilling the function partly of a gasifier and partly of a vaporizer—consist of a fuel circulating pump, an atomizer, a specially adapted high- tension igniter, and a float-feed regulator. The first of these—the fuel pump p—has a capacity equal to some twenty to thirty times the consumption of the motor, and circulates the paraffin under a slight pressure past a needle-valve regulated spray nozzle j; the finely