double-acting steam-engine and condenser—James Watt, Scotland, 1782.
To each crane is fixed a 10-inch cylinder, 20-inch stroke, double-acting.
In the engraving of the double-acting engine with fly-wheel (Fig. 31), it is shown at T, as controlled by the governor.
E is the steam-cylinder, and F the pump, which is seen to be double-acting.
This differs from the one just described chiefly in that it is single-acting, while the other is double-acting.
In 1780 he built a double-acting high-pressure engine with a crank, for Cooks Kitchen mine.
Smaller pumps, having one double-acting or two single-acting cylinders, are also used for shallow water work.
The above estimates must be understood as referring to double-acting steam engines above thirty-horse power.
In 1718 La Hire revived and improved the double-acting pump of Ctesibius, but to what extent he put it into use does not appear.
Some double-acting cylinders have a piston rod half the area of the piston.