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

WITH INDUCTION ATOMIZERS. 47 proportioning of the oil and air supplies at different positions of the throttle ; for this purpose each of the pressure pipes is pro vided with a pin val ve, and by adjustment of these the required pressure can be caused to keep within a small margin of that determined upon —i.e., 8 to 15 Ibs., according to the density and flash- point of the oil used. In the Griffin vaporizer, which is a development of the one just described, compressed air is also used, but with a different form of atomizer, the construction of the vaporizer also differs somewhat, but is essentially the same in general principle. The vaporizer is larger and a higher compression is used in the engine, and in the larger sizes the cheaper brands of semi-refined oils, such as solar, gas, and ot her inter- mediate grades can be used, the vaporizer being provided with a deflecting baffle for intercepting unvaporized residuum, which in practice varies according to the density and flash-point of the oil used. and also to the load on the engine, and consequently the temperature of the exhaust, and is drawn off from time to time from the base of the vaporizer. Early Methods with Induction Atomizers.—The utilization of the heat of the exhaust in engines required to run on the paraffin lanip grades of flash-proof oils has the peculiar advantage over vaporizing systems depending on a more or less specialized form of cylinder, in that an exhaust jacketed or exteriorly heated vaporizer can be readily adapted to an ordinary one-, two-, three-, or four-cylinder gas or petrol engine, and with compara- tively little structural change, as compared with other systems which all involve duplication of the necessary vaporizing chamber and oil feed mechanism for each