. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . tem, that, although the whole of the engine maybe said to be contained within the sphere itself, yet the capacity of the engine is no other thanthe full capacity of the sphere itself, inasmuch as four quarters of the sphere are filled andemptied in one revolution. Construction of Engine: The names adopted for the three principal working parts are asfollows : The intermediate vibrating disk P is called the piston, an
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . tem, that, although the whole of the engine maybe said to be contained within the sphere itself, yet the capacity of the engine is no other thanthe full capacity of the sphere itself, inasmuch as four quarters of the sphere are filled andemptied in one revolution. Construction of Engine: The names adopted for the three principal working parts are asfollows : The intermediate vibrating disk P is called the piston, and the sectors P and A onthe ends of the main and dummy shafts are called respectively the main and dummy piston, replacing the geometrical disk of infinitesimal thickness, has to be made of sub-stantial thickness, and fitted effectively with a steam-tight packing all round its edge. Thehinge union along the straight edge of each blade has to be made a cylinder of finite diameterinstead of a geometrical line; and the junction must be so contrived as to make a substantialhinge-joint that will stand the wear and tear consequent on the rapid oscillation of the Fig. 9.—Tower spherical engina Thickness is obtained for the piston by deducting hlfa its thickness from each of the two flatsides of each blade—that is, the disk Pand sector B. originally depicted as in Figs. 5 and 6,are altered to the forms shown in Figs. 7 and 8. Two cylindrical ribs, having their axes inthe middle plane of the piston, are formed on its opposite faces, and along diameters at rightangles to each other. Fig. 7. and into these are let circular lugs with eyes, formed on thestraight edges of the two blades. Fig. 8, which are thereby hinged to the piston in the mannerof an ordinary hinge, having a lug and socket with a pin through. The effect of these depart-ures from the elementary geometrical form already described is to reduce the capacity of theengine by the amount of the cubic measure
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
