Patent 23993 Summary

Claim.lst. In a steam engine, a cylinder having independent steam and exhaust ports, and a steam space shorter than the stroke of the piston, combined with two movable piston-heads reciprocatingly actuated, so as to prevent the formation of a steam space on the steam side of the piston during the initial portion of the stroke, and to alternately close and open each exhaust port, substantially as described. 2nd. In a steam engine, having separate steam and exhaust ports,the combination of the cylinder, movable piston cylinder heads a sliding frame by which these piston cylinder heads are carried, and suitable connections with the crank shaft for reciprocating said sliding frame to cause said piston heads to alternately close and open each exhaust port, substantially as described. 3rd. Id a steam engine, having a cylinder provided with independent steam and exhaust ports, and the steam space which is shorter than the stroke of the piston and is formed between movable piston heads, a sliding frame to which said piston heads are secured, and by means of which they are moved at the beginning of each stroke to translate the steam space of the cylinder, the necessary distance to accommodate it to the stroke of the piston and to alternately close and open each exhaust port, substantially as specified. 4th. In an engine, having independent steam and exhaust ports, substantially as described, the combination of the movable piston heads D, C, the sliding frame to which they are secured, of suitable connection with the engine for reciprocating said sliding frame to cause said piston heads to alternately close and open each exhaust port, and of a crank motion in said connection which stops on its centres so as to lock the sliding frame, all substantially as described. 5th. In an engine, substantially as described, the combination of the movable piston heads D, C, the reciprocating sliding frame by which they are earned, the wrists I. the rock-shaft k operated by the engine, the cranks 1 an said rock-shaft, and the links m, all substantially as described. 6th. The combination, in a steam engine, with the movable piston heads C, D, and the rods H and cross-heads G connecting the same, of the crank-shaft a, disk S having projection c, the plate d, with projections e, the crank-shaft k and connections between the oranks a, k, substantially as and for the purpose specified. 7th. The combination, in a steam engine, of the side bars H, II, provided with wrist pins 1,1, the cross-heads G , G, ri carried by said side bars, the piston rods F. F,F, all having an intermitting reciprocating motion derived from, and oper- ated by the mechanism, consisting of the disk b, with projections e, said disk being secured to the shaft a, the plate d, with the projections 4, the rod g, which connects the plate d to the upper end of the slotted rocking lever i, the sliding block i, the wrist pins o, p the cranks 1, 1, the crank-shaft k and the connecting rods m, which connect the wrist pins o, p with the wrist pins 1,1, on the side-bars H I all substantially as described and for the purposes specified, 8th. n a steam engine cylinder, the combination of the movable piston heads C, D, with the steam ports N, N, a valve M, a piston B moving independently of the piston heads C, D, and the independent exhaust ports 0, 0. substantially as shown and for the purposes specified.