DUPLEX a.
ape-wheel has two sets of teeth. See Escapement. -- Duplex lathe, one for turning off, screwing, and surfacing, by means of two cutting tools, on opposite sides of the piece operated upon. -- Duplex pumping engine, a steam pump in which two steam cylinders are placed side by side, one operating the valves of the othe…
MACHINE n.
Infernal. -- Machine gun.See under Gun. -- Machine screw, a screw or bolt adapted for screwing into metal, in distinction from one which is designed especially to be screwed into wood. -- Machine shop, a workshop where machines are made, or where metal is shaped by cutting, filing, turning, etc. -- Machine tool, a…