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

SUPPRESSING EXPLOSIV E ACTION. 57 venience with low-grade petrol for the preliminary run necessary to heat the vaporizer. Referring to the illus- trations, it will be seen that the running fuel (gas-oil) is pumpecl from an underground tank along the pipe p through a series of fine strainers n to an overflow reservoir d, the surplus supply retuming to the tank by the down- take t; this feed cistern is jacketed and connected to the vaporizer so that part of the exhaust can circulate round it, such as is found necessary for rendering the fuel freely limpid, and is under Control by a regulator li. For this low-grade oil-—i.e., in comiection with this system of vaporizing—the heating surface is relatively large ; also, it is found necessary to provide for a varying amount of unvaporizable residuum that collects in the well v1, by way of an overflow weir m connected to a pipe that is continued down to a residuum tank placecl at a sufficiently low level to prevent this from being drawn up into the vaporizer again by suction effect . For starting, a regulator rs feeds petrol from a float-cistern f directly over the con-divergent mixing nozzle c ; at the side of this again there is a second regulator r5 for feeding a water spray direct to the mixture from the float-feed cistern f1; there can, if required, be also a third and larger fuel feed regulator under the annulus u surrounding the mixing nozzle (not shown) for the supply of producer gas, thus enabling the engine to be instantly interchange- able from petrol to gas-oil or to producer gas as the éxigencies of the occasion may demand. By this feed system also illuminating gas can be arranged to start up on, instead of petrol.