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

24 VAPORIZING OF PARAFFIN. a duet in the fuel feed valve, v, which was provided with an index dial, r, and a cushion spring for taking up any lost motion in the fine thread on the valve stem. In this carburettor or fuel inspirator, the mixture was maintained . practically at an equal strength for varying degrees of throttle opening, so essential for a motor to respond quickly either for a heavy pull or for speed when opened out; in running dead slow also, the plug p (Fig. 16),. in reducing the area of the nozzle, caused the air to flow into the mixing chamber with a vortex effeet, and to draw in the correct amount of fuel to keep the engine going, however slow; consequently starting was an easy matter, which is important. The fuel (benzolene) was drawn up from a float-controlled constant-level cistern of the form shown in Fig. 10; in this particular case the inspirator was arranged over the ball-float cistern, and drew. its supply up through a pipe shown in dotted lines; the inspirator was also combined with a governor-controlled hollow plug throttle, t, and was fitted in a liner seat having a series of slots communicating with the supply pipe m leading to the engine. In the jet carburettor used in the cut-out controlled Daimler motors of 1894-98 no automatic regulation to either the petrol or air supply was necessary, for the reason that the speed of the motor was constant and not under throttle control; the carburettor used -was of the simplest possible construction, and closely resembled that shown in Figs. 17 and 18, but had neither air valve nor throttle. The reliability of the jet carburettor was soon recog- nised as a great improvement on those clepending on evaporative effeet, especially for road cars, for which