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

80 VAPORIZING OF PARAFFIN. of this make, 5’25 indies x 6-25 indies, recently de- veloping 33 B.H.P. at 800 revolutions per minute, without water drip ; although this is used in motors having a higher compression, as for instance, when converting a gas engine to be able to run on oil or gas, on the inter- changeable system. It will be seen there are a pair of float cisterns f to control the two fuel supplies, which are again controlled by two plugs k, k1, by which means changing over from petrol as used in starting to paraffin can be effected in less time than when a single cistern is used; the use of two cisterns affords the further advantage, also, of permitting a partial feed of petrol with the paraffin, until the motor has warmed up thor- oughly to its work, and avoids the necessity at any time for emptying the cistern of paraffin before a start can be made. On the mixture valve vi is fitted a small needle- valve n, steadying pins being also fitted in this valve at intervals, the valve n acts as a sniffer and prevents feed leakage even with the level in / above the admission valve vi; the rate of feecl to the snifting pin n is regulated by an adjustable needle-valve e to the requirements of the motor. There is no extra air valve, and all the air supplied to the motor passes through the vaporizer, the only air adjustment found necessary is made by the slotted cap ci, and this can be locked by the wing-nut a1. It should be mentioned that on the stem of the lift valve vi is fitted a steadying piston d to prevent chatter and undue wear of the pin n. Mixture to the motor is admitted past a hollow ported plug h arranged for hånd or governor control. In the two following snifting-feed vaporizers fuel is supplied at a slight pressure-head, this in the Barker