Machinery and processes of the industrial arts, and apparatus of the exact sciences . Behrens Rotary Engine. It will he seen that there are in the same solid casting two cylindricalcavities which overlap each other. In the centre of each cylinder is asolid cylindrical core. Between each of these cores and the surface ofthe corresponding cylinder is a piston of peculiar shape, being part of asolid ring, filling up the intermediate space as far as it goes, and fittingboth to the cylinder internally and to the core. These pistons are firmlyattached to axes, which appear in section at 0 and C in t
Machinery and processes of the industrial arts, and apparatus of the exact sciences . Behrens Rotary Engine. It will he seen that there are in the same solid casting two cylindricalcavities which overlap each other. In the centre of each cylinder is asolid cylindrical core. Between each of these cores and the surface ofthe corresponding cylinder is a piston of peculiar shape, being part of asolid ring, filling up the intermediate space as far as it goes, and fittingboth to the cylinder internally and to the core. These pistons are firmlyattached to axes, which appear in section at 0 and C in the figures. 84 PARIS UNIVERSAL Fisr. U. The maimer of attachment is shown in the perspective view of one ofFig. io. the pistons with its axis in Fig. 10. The axes are connected externallyto the cylinders by equal gear-wheels, so that they move simul-taneously and with equal veloci-ties. The two centres of motion,0 and C, are distant from eachother about two-thirds of the com-mon diameter of the cylinders; and the cores c and c, which in theirentire dimensions would he too large to allow the pistons to revolve, arereduced on the inner sides to a proper curvature to fit the piston exactlyas it passes. Steam is introduced through the tube B and dischargedthrough D. In Fig. 11 it will be seen that the pressure will be on theconcave face of E, produc-ing motion in that piston,while it will be directed tothe centre of motion of E,which will therefore formthe resisting fulcrum. Theopposite state of things isshown in Fig. 12, in whichE receives the propellingforce, and E7 presents theresistance. The simplicity of construc-
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