Modern Gasworks Practice

bi> æ tf. MODERN GASWORKS PRACTICE ferably be removed so that the retort may be packecL The hydraulic power is con-veyed to the machine by flexible wired hose pipe, and the working pressure varies between 400 and 600 Ib. per square inch. The machmes travel in front of the benches on a double-line track, and a special three-cylinder hydraulic motor is provided for this purpose. The total weight of a machine with hoppers filled is about 12 Fig. 201.— The Aebol-Foulis Hydraulic Charger. tons. Two chargers and one hydraulic pusher are capable of dealing witli about 40 retorts per hour with charges of about 18 cwt. The capacity of the machines is, therefore, about 36 tons of coal per hour. The Hunter-Barnett Pusher One of the first hydraulic pushers to be introchiced was that invented about 1907 by Messrs. Hunter & Barnett. It is very generally employed in conjunction