MONITOR n.
A tool holder, as for a lathe, shaped like a low turret, and capable of being revolved on a vertical pivot so as to bring successively the several tools in holds into proper position for cutting. Monitor top, the raised central portion, or clearstory, of a car roof, having low windows along its sides.…
MOON n.
The celestial orb which revolves round the earth; the satellite of the earth; a secondary planet, whose light, borrowed from the sun, is reflected to the earth, and serves to dispel the darkness of night. The diameter of the moon is 2,160 miles, its mean distance from the earth is 240,000 miles, and its mass is one eig…
PISTOL n.
one hand, -- now of many patterns, and bearing a great variety of names. See Illust. of Revolver. Pistol carbine, a firearm with a removable but- piece, and thus capable of being used either as a pistol or a carbine. -- Pistol pipe (Metal.), a pipe in which the blast for a furnace is heated, resembling a pistol in fo…
RATCHET n.
a drill by hand, consisting of a hand lever carrying at one end a drill holder which is revolved by means of a ratchet wheel and pawl, by swinging the lever back and forth. -- Ratchet wheel (Mach.), a circular wheel having teeth, usually angular, with which a reciprocating pawl engages to turn the wheel forward, or a…
REPEATING a.
s are held in, and discharged from, a revolving chamber at the breech of the barrel. See Revolver, and Magazine gun, under Magazine. -- Repeating instruments (Astron. & Surv.), instruments for observing angles, as a circle, theodolite, etc., so constructed that the angle may be measured several times in succession, an…