Note.—It will be easily understood that the B. O. is an abbreviation; it stands for Bordo. The makers claim for the device that, 1, it will not stick or jam, 2, it keeps it seat under pressure, 3, it has full pipe area in ports, 4, it is easily adjusted to take up wear and, 5, it opens and closes with a quarter turn and with a very short wrench.
PIPES, JOINTS
AND FITTINGS
Figs. 641, 642.—See page [363].
PIPES AND FITTINGS.
A pipe was originally a wind instrument of music, consisting of a tube or tubes of straw, reed, wood or metal; in the literature of hydraulics this wind instrument becomes “a long tube or hollow body of wood, metal, earthenware, or the like; especially, one used as a conductor of water, steam, gas, etc.”
A pipe fitter is one who fits pipes together, or applies pipes, as to an engine or pump. A pipe fitter uses all the tools already described and in addition several others, as stretched lines, the spirit level and plumb-bob; he also uses special devices to aid in special cases; these are sometimes invented by himself and sometimes belong to “the trade-lore” transmitted in the long and varied operations of every successful shop. A pipe fitting is a piece, as a coupling, a valve, etc., used for connecting lengths of pipe or as accessory to a pipe. Joint comes from the word join and means the place or part where two things or parts are joined or united as a joint in a pipe. See note below.