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Mechanical applicances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical mvements, powers and devices"; (1917)

Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing company · leaf 280

An illustration from Mechanical applicances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical mvements, powers and devices";, 1917, leaf 280
ars;/, temper screw to adjust the length of rope for properly operating the jars and drill;m, clevis or walking-beam strap. 712. WELL-BORING TOOLS. Sand auger. Thebottom is a spiral bit for catching the sand by turn-ing the auger. A door on one side for discharging thesand. MINING DEVICES AND… … 714. PROSPECTINGDIAMOND DRILL. A hollow drill bar, /, slides inthe revolving hollow shaft,e, driven by the bevel gear,d, from a motor. Wateris forced through the drillrod by a pump. The drillis tipped with a steel ringstudded with black dia-monds, so that the drillmakes an annular cut bywhich cores…

Mechanical movements

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