valve, _i_ (Fig. 2), is effected by a single pulling movement upon the
handle, I, and this draws out the valve horizontally. For this end the
lever is pivoted upon the extremity of the valve stem, and ends in a
bar engaging with a fork which acts as its fulcrum. This fork is cast
in one piece with the plug, J, which closes the opening through which
the valve is put in place, as shown in detail in Fig. 8. To prevent
the lever from spinning out of the fork when it is pulled or pushed,
this lever is prevented from turning by the valve stem, provided for
this purpose with a double rib, _i'_ (Figs. 2 and 8), which engages in
slots in one piece, _j_, secured in the interior of the plug, J.

Lest the friction of the conical distribution valve oscillating with
the cylinder should occasion a loss of power, care is taken to leave
the key free in its seat, _b_, by not forcing the pivot, _k_ (Figs. 1,
3, and 5), whose position in its seat is regulated by the screw, _k'_.
It follows that a very slight escape of water may be produced, but
that does no harm, as it is caught in the reservoir, C, provided with
a little pipe, K (Figs. 1 and 3), to carry it away.

To maintain proper relations between the pressure of the water, or the
work it is called upon to do, and the motor, the quantity of water
introduced into the cylinder at each stroke of the piston is regulated
by adjusting the length of stroke by the crank pin. For this end the
course of the latter is made variable by means of the piece, _f_,
adjusted by set-screw in the interior of the disk, F (Figs. 3 and 7),
and tapped for the reception of a screw terminated by a milled button,
_f_. If this button is turned, it moves the piece, _f_, and therefore
regulates the distance of the crank pin, _g'_, to which the piston
rod, _g_, is attached (Fig. 3) from the center of rotation.