[424]. Mode of connecting an oscillating lever by a sliding joint to any reciprocating part, such as a steam hammer head, engine crosshead, &c. See [Nos. 893, 894].

[425]. Suspended treadle motion.

[426]. Eccentric and sliding bush motion for a double piston engine.

[427]. Rocking lever motion by gearing and a tied crank pin. The upper pinion drives the crank disc on the middle centre at each revolution, of which the lever with the gearing attached oscillates from side to side as shown.

[Larger plate.]

[428]. Crank pin and slotted lever for giving a variable speed to the connecting rod. See [No. 1195].

[429]. Side gudgeon crank motion.

[430]. Bell crank and disc crank motion, the bell crank centre having horizontal as well as vertical movement.

[431]. Worm wheel and screw reciprocating motion by means of a tied crank pin. Useful for slow speeds.