. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . ransmission has to beundertaken, important improvements are likely to be effected. The new industry of electric lighting has made it necessary to produce mechanical powerfor diiviug the dynamos in very large quantity, and new chemical and metallurgical processes are being discovered, which en-tirely depend for their commer-cial success on the provision ofcheap motive power. The electricreducing processes by which al
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . ransmission has to beundertaken, important improvements are likely to be effected. The new industry of electric lighting has made it necessary to produce mechanical powerfor diiviug the dynamos in very large quantity, and new chemical and metallurgical processes are being discovered, which en-tirely depend for their commer-cial success on the provision ofcheap motive power. The electricreducing processes by which alu-minium is being obtained, electricdepositing processes used in ob-taining high-class coppei-, electricwelding processes, and othersmust drift to places where cheappower in large quantity can be ob-tained. Niagara is likely to be-come not only a great manufact-uring center, but the home of im-portant industries of a new Machiue : seeVending Machine. Nickel Steel: see Alloys andArmor. Nozzles, Hose : see Fire Ap-pliances. NUT-FACINGBIACHINE. Amachine for dressing the sur-faces of nuts and bolts. Fig. l.—Nut-facins machine. ^^^^ NiChoUon & Waterman. 566 NUT-FACING MACHINE. Nvt-fncing MacJnve. Fig. 1, has two duplicate spindles placed in a revolving drum, which islocked in such a position as always to have one spindle above the other. This arrangementpermits the upper spindle to remain at rest, and allows the work to be removed and replaced,at the same time the cutters are facing the work on the lower spindle. The cutters, which are made of bar steel ground to shape and tempered, are held in anoscillating liead governed by a cam motion and change gears. Three cutters are used, shapedas in Fig. 2. One cutter removes the first thread, the second relieves or rounds the corner, and the thirdfinishes the flat. While each cutter can be shaped to do all these operations, this arrange-ment is much cheaper in time of grinding and resharpeuing. It will be seen that i
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
