Wooden base, 6-1/4 in x 8 in.: 2-3/8 in. thick.
Thickness of plate supporting cylinder, 3/8 in.
Total height of engine, 13-1/4 in.
Distance from base plate to under side of cylinder head. 9-1/4 in.
Diameter of vertical posts, 9-16 in.; distance apart, 3-1/2 in.; length between shoulders 6-1/4 in.
Base plate fastened to base with 1/4 in. bolts.
The connecting rod, eccentric rod, crank pin, and shaft, are of steel. The eccentric-strap and flywheel are cast iron, and the other portions of the engine are of brass. The screw threads are all chased, and the flange, a, and head of the piston, F, in addition to being screwed, are further secured by soft solder.
Fig. 1 shows the engine in perspective. Fig 2 is a side elevation, with parts broken away. Fig. 3 is a vertical transverse section. Fig. 4 is a partial plan view. Fig. 5 is a detail view of the upper end of the connecting rod and its connections; and Fig. 6 is a horizontal section taken through the middle of the valve chamber.
The cylinder, A, is threaded externally for 1 inch from its lower end, and the collar, a, 1/4 inch thick, is screwed on and soldered. The face of the collar is afterward turned true. The same thread answers for the nut which clamps the cylinder in the plate, B, and for the gland, b, of the stuffing box, which screws over the beveled end of the cylinder, and contains fibrous packing filled with asbestos or graphite. The posts, C, are shouldered at the ends and secured in their places by nuts. Their bearing surface on the plate, D, is increased by the addition of a collar screwed on. The posts are made from drawn rods of brass, and need no turning except at the ends.
