Page:Motors and motor-driving (1902).djvu/144

112 the exploded charge through, but not into the petrol, for the purpose of warming it, and so assisting in its better vaporisation.

is the air inlet, and attached to its lower extremity is a plate. The suction of the piston through the induction valve and supply pipe causes a rush of air down through, which mixes with the vapour rising from the petrol, and is drawn upwards into the twin tap, or mixing chamber on the top of the carburetter. The plate is to prevent the petrol



from splashing upwards, and to diffuse the air over the spirit, and its position can be regulated by raising or lowering the tube, so that it will rest just above the surface of the petrol. As will be seen, the plate does not touch the sides of the carburetter, and consequently the vapour forming by the mixture of gas and air can rise round its sides into the upper portion of carburetter, in which the mixing process is continued. is a float with wire attached to indicate the height of the petrol.

is the twin tap in which the mixing is finally completed.