s, Minn. ber inclosing the upper end of the base or sup- THE INGEBSOLL DUPLEX BOCK DBILLING MACHINE. port. The top plate, to which the fire box and oven IMPBOVED LEAD PIPE BEEL. are; joined, is provided .with a hollow ball, open at Lead pipe is usually put up on reels' which do not collars above… … stove. The base forms the chimney of the stove, and the drill against the resistance of the spring. When EITAPENC'S IMPBOVED LEAD PIPE BEEL. is connected at its bottom with a horizontal pipe which the shaft cranks pass over center, the spring drives the drill into the rock with all its force, the…
Patents · Patented · Color · Shaft · Formed · Scientific American · Yellow glass · Supreme Court · Address munn · Express money · Natural gas · Drill shaft · Side scenes · American supplement · Spring wheel
Internet Archive · Public domain (published before 1931). Free to use for anything.
