DUPLEX a.
Double; twofold. Duplex escapement, a peculiar kind of watch escapement, in which the scape-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…
GRASSHOPPER n.
In ordinary square or upright pianos of London make, the escapement lever or jack, so made that it can be taken out and replaced with the key; -- called also the hopper. Grove. Grasshopper engine, a steam engine having a working beam with its fulcrum at one end, the steam cylinder at the other end, and the connecting r…
LEVER n.
ound lever, a machine consisting of two or more levers acting upon each other. -- Lever escapement. See Escapement. -- Lever jack. See Jack, n., 5. -- Lever watch, a watch having a vibrating lever to connect the action of the escape wheel with that of the balance. Universal lever, a machine formed by a combination o…