STATIONARY ENGINES.

319

PhCÜTV Fig. 203.—Hydraulic Crane

. General Arrangement of Machlnery.

a, Pressure cylinder. b, Ram. c and d, Pulleys. e, Guide pulley. f, Crane post. G, Handlefor valves. h and 1, Weights. j, Pressure pipe. k, Exhaust pipe. l, Supplementär?valve. m, Permanent weight. n o, Cylinders and plungers for turning the crane.

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Fig. 204.—Cylinder and Valves for Double-power Hydraulic Crane .

a, Cylinder. b, Ram. C and d, Pulleys. e, Piston, f , Valve ehest , h, Inlet valve. 1, Outlet valve.J, Pressure pipe. K, Exhaust pipe. l, Valve for higher power. m, Valve . N, Relief valve.