BLANCHARD LATHE n.
for making noncircular and irregular forms, as felloes, gun stocks, lasts, spokes, etc., after a given pattern. The pattern and work rotate on parallel spindles in the same direction with the same speed, and the work is shaped by a rapidly rotating cutter whose position is varied by the pattern acting as a cam upon a…
BLAST n.
A flatulent disease of sheep. Blast furnace, a furnace, usually a shaft furnace for smelting ores, into which air is forced by pressure. -- Blast hole, a hole in the bottom of a pump stock through which water enters. -- Blast nozzle, a fixed or variable orifice in the delivery end of a blast pipe; -- called also blas…
BLIND a.
er Blank, a. -- Blind level (Mining), a level or drainage gallery which has a vertical shaft at each end, and acts as an inverted siphon. Knight. -- Blind nettle (Bot.), dead nettle. See Dead nettle, under Dead. -- Blind shell (Gunnery), a shell containing no charge, or one that does not explode. -- Blind side, the…