. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . of the working cylin-der, and terminating in inlet ports lead-ing into the interior of the working cyl-inder. Another slotted chamber in theexternal surface of the working cylin-der leads from reduction ports through the cylinder, and terminates in a channel leading tothe atmosphere through the head of the cylinder. The piston is made long and fits fluid-tight, but with a minimum of friction in the cylinder. In the


. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . of the working cylin-der, and terminating in inlet ports lead-ing into the interior of the working cyl-inder. Another slotted chamber in theexternal surface of the working cylin-der leads from reduction ports through the cylinder, and terminates in a channel leading tothe atmosphere through the head of the cylinder. The piston is made long and fits fluid-tight, but with a minimum of friction in the cylinder. In the piston, but working transverse-ly through it, is a piston-valve, which is worked by the pressure of air admitted throughthe port in the side of the cylinder and exhausted through other ports in the same manner asthe piston-valves of some steam-pumps, the proper ports in the cylinder being covered anduncovered bv the motion of the piston. The valve consists of a cylindrical plug having twogrooves formed therein with a collar between them, and fits in a cylindrical transverse seat inthe piston, and covers and uncovers, at proper intervals, admission and exhaust ports leading. \ir-tool. 23 ALARMS. LOW-WATER.


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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering