Fig. I is a side elevation of a reciprocating water motor, with the back end in section showing the piston packed with the ordinary hydraulic cup leathers. Fig. 2 is an end elevation with valve gear for reversing the flow of water. For the latter purpose an ordinary four-way cock is used. The plug of the cock is reversed by the quadrant A carrying the lever B past the centre and on falling it carries with it the arm C. Fig. 5 is a side elevation of the arm, showing the position in which it must be keyed on the plug spindle. The weight on the lever B should only be sufficient to overcome the friction of the plug and gland. In Fig 1 the piston is shown at a little more than half of its backward stroke. The quadrant A has commenced to take over the lever B and weight, and on getting to the centre line will take with it the arm 0 (Fig. 2) and on passing the centre line the quadrant and arm will tall together, throwing over the plug. Apiece of india-rubber to form a cushion to break the fall of the lever must be fixed on each side of the bracket carrying the plug spindle. The quadrant is worked by the rod E (Fig 1) irom the cross-head F on the piston rod. The working cylinder G is a piece of 3-in. drawn brass tube l6 in. long. The ends are two iron castings, with a port lin in diameter in each. The back end has a cover, and the front carries a stuffing bos, as shown in Fig. 1. Ihe feet for bolting down the motor are cast with the ends. The pipes H, of 1-in. wrought iron, are fixed to the cylinder ends with flanges I. The ends and brass cylinder are bolted together by three stay bolts K, but only two are shown. At the back end the heads are countersunk to allow the cover to be bolted on. At the front the ends are taken through, all being drawn tight together by the nuts. L is the exhaust pipe and M the inlet. Figs. 3, 4, and 6 show the four-way cock drawn to a larger scale. Fig. 3 is a section of the cock with the web of the plug in position for making the backward stroke, as in Fig. 1, exhausting from the back. Fig. 4 is an elevation of the cock partly in section, Fig. 6 is a section of the plug, which should he carefully ground in to make it watertight, there being no gland, but only the light spring at the back to keep it to its face. The cock and plug must be cast in brass or gun-metal. Fig. 7 shows the quadrant and arm. To avoid confusion, only a few dimensions are shown. Those not given can easily be found by constructing two scales, as all the drawings are to scale, Figs. 1 and 2, not dimensioned, being one-sixth full size.

Reciprocating Water Motor 835Reciprocating Water Motor 836Reciprocating Water Motor 837

Fig. 2.

Reciprocating Water Motor 838Reciprocating Water Motor 839Reciprocating Water Motor 840Reciprocating Water Motor.

Reciprocating Water Motor.