- (of a reciprocating engine, pump, etc.) having pistons accomplishing work only in one direction.Compare double-acting(def 1).
Origin of single-acting
First recorded in 1815–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for single-acting
By single-acting is meant that the air cylinders compress their respective volumes of air once every revolution.
This differs from the one just described chiefly in that it is single-acting, while the other is double-acting.
The double-acting engine, unlike the single-acting pumping engine, required a piston rod that would push as well as pull.Kinematics of Mechanisms from the Time of Watt
Eugene S. Ferguson
A chain from the piston-rod to the arch head, as described in the single-acting engine, would fail to transmit this force.
The piston will, therefore, be pressed downwards by the action of the steam above it, as in the single-acting engine.
- (of a reciprocating engine or pump) having a piston or pistons that are pressurized on one side onlyCompare double-acting (def. 1)