All About Engines

136 All About Engines Fig. 82 on Plate 9 shows a section through a “ C ” type compound engine made by Beiliss and Morcom. The reader will notice that there is only one eccentric to operate the valves for both cylinders, and the direc- tion taken by the steam can be traced by the arrows. He will also observe that the shapes of the pistons and cylinder covers are such as to give the least possible clearance space. The moving parts are wholly en- closed, and a small pump, shown separately in Fig. 83, forces oil from the crank case to every joint. The path of the oil to the bearings, cross-head, etc., can be traced by the small tubes and “dotted” passages. By this means oil at from 10 to 20 lb. per 1 inch way all 1 surfaces and Fig. 83.—Valveless oil pump . pressure square finds its between rubbing prevents overheating or wear. The governor, which is placed at the end of the crankshaft (Fig. 82) and operates a throttle valve of the equilibrium type, will maintain the speed constant within 3 per cent. This engine represents the acme of perfection among engines working on the plan rendered famous