In the position of spool 2 shown, fluid under pressure is delivered from the pump to the power cylinder. Fluid from the exhaust end of the cylinder is drained through a groove of spool 2 to the tank. Braking of the machine tool table, linked to the piston of the power cylinder, is accomplished by cones 3 of spool 2, which throttle the fluid being drained to the tank. When lever 1 is turned about fixed axis A by a stop on the machine tool table, spool 2 is first stationary, owing to the provision of slot a in which pin d of the spool slides. After lever 1 reaches its extreme left-hand position, when its pointed lower end passes over the point of member 5, which is actuated by spring 4, spool 2 is shifted to its extreme left-hand position. At this, fluid under pressure is admitted to the other end of the power cylinder.
$3915$LHP,FC$