. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. ral bit for catching the sand by turn-ing the auger. A door on one side for discharging thesand. MINING DEVICES AND APPLIANCES. 275 713. WELL-BORING TOOLS. Portable power rig and drill beam. A frame tower isU also used above the drill hole for asheave over whichthe dr
. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. ral bit for catching the sand by turn-ing the auger. A door on one side for discharging thesand. MINING DEVICES AND APPLIANCES. 275 713. WELL-BORING TOOLS. Portable power rig and drill beam. A frame tower isU also used above the drill hole for asheave over whichthe drill rope ispassed and to awinch driven by theengine. 714. PROSPECTINGDIAMOND DRILL. A hollow drill bar, /, slides inthe revolving hollow shaft,g, 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 byw^hich cores may betaken out for examina-tion. The tailings of thedrill are washed to thesurface by the force ofthe water jet. ^ is a soHdr^^^^^^^^i_ diamond-set drill; a, acore drill. 715. ASSAY ORE CRUSH-ER. A combination of jaws andfinishing roller, adjustable to crushthe ore sample to a uniform size. F, F, adjusting scre^^s for , friction thrust rollers. B, fin-ishing 270 MINING DEVICES AND APPLIANCES.
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
