DIRECTACTING

Di*rect"-act`ing, a. (Mach.)

Definition: Acting directly, as one part upon another, without the intervention of other working parts. Direct-acting steam engine, one in which motion is transmitted to the crank without the intervention of a beam or lever; -- also called direct-action steam engine.

– Direct-acting steam pump, one in which the steam piston rod is directly connected with the pump rod; -- also called direct-action steam pump.

Source: Webster’s Unabridged Dictionary 1913 Edition