with conical England in 1886, where examples of shells and bolts, invented and intro- nearly all forms of compression coup- duced by Messrs. William Sellers & lings then known were tried, the pres- Co., of Philadelphia, thirty or more ent one showed the greatest truth and years ago, and yet… … duced, and were the outcome of a suc- 2 1 is a perspective view of one of these cessful attempt to reduce shaft fittings couplings as it appears when applied to an organized manufacture. on a shaft. The principal difficulty met with in In this review of compression or in- the system has been the…
Engineering
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