. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . e valves Aopen, and some of the water flows intothe air-vessel L, from which it of course is constantly flowing out through deliyery-pijic little air still remains in the chamber. This air is compressed and enters the air-vessel, andis used to drive the motor which actuates the main valve. The column of water flowing inthe flow-pipe is thus brought to rest entirely by the elastic resistance of air. Winn it iia-&
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . e valves Aopen, and some of the water flows intothe air-vessel L, from which it of course is constantly flowing out through deliyery-pijic little air still remains in the chamber. This air is compressed and enters the air-vessel, andis used to drive the motor which actuates the main valve. The column of water flowing inthe flow-pipe is thus brought to rest entirely by the elastic resistance of air. Winn it iia-<ceased to flow, tlie main valve is again fipeiied, the water witii which the chamber / is now fullcscajtes, the air-valve ./falls open, admit ting at iii(tsi)h(Tic air. and the water again begins to flowand to escape through valve C. As regards t he eHicieiicy wit li which the engine works, carefulexperiments have been made, gauging accurately Ihefiuaiitities of water used and delivered, andtheir respective heads. The head of sujjply was 17 ft. When head of delivery was ITK) efficiency was 70 per cent, and when the head was 100 ft. the eflicieiicy was 72 per Fio. ].—Pearsalls hj-draulic engine. ENGINES, HYDEAULIC. 275
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
