The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purpose

by Thomas Walter Barber

[1118]. Three-cylinder, with yoke crosshead. Either the centre cylinder or the two side ones can be used as the steam motor cylinders, or the pumps.

HORIZONTAL ENGINES.

[1119]. The ordinary direct-acting engine, with either steam-moved or tappet valves, see Tangye’s “Special,” the “Coalbrookdale,” and others, in which the slide valve is operated by pistons controlled by auxiliary tappet valves on the same principle as [No. 1506].

[1120]. Direct-acting, with crosshead and guide bars between the cylinders.

[1121]. Two modifications of [No. 1120].

[1123]. Direct-acting, with rocking lever valve motion; see the “Worthington” and other “Duplex” pumps, in which two engines are combined so that one works the valve of the other.

[1122], [1124], & [1125]. Other forms of direct-acting engines.

[1126]. Horizontal compound direct-acting. The high-pressure cylinder, low-pressure ditto, and receiver are side by side, and the air pump and main pump in line with the steam cylinders.

[Larger plate.]