. American engineer and railroad journal . e or noextra time or attention being given the matter and with noexpense other than the first cost of the coupling. Thedevice is made wholly of aluminum bronze and has a tensilebreaking strength of 011,000 pounds to the square Inch, andan elongation ol 20 per cent. In eight inches, which is equalto the strength and toughness of mild steel. It is verysimple in its coostructioti, there being but two parts, con-sisting of a screw and socket. These screw together whenthe lope is first put on the pulleys and lock securely, so thatthe coupling can he separa
. American engineer and railroad journal . e or noextra time or attention being given the matter and with noexpense other than the first cost of the coupling. Thedevice is made wholly of aluminum bronze and has a tensilebreaking strength of 011,000 pounds to the square Inch, andan elongation ol 20 per cent. In eight inches, which is equalto the strength and toughness of mild steel. It is verysimple in its coostructioti, there being but two parts, con-sisting of a screw and socket. These screw together whenthe lope is first put on the pulleys and lock securely, so thatthe coupling can he separated only by using a wrench ofspecial design. A very Important and interesting feature of the couplingwhen screwed together isan internal swivel and ratchet,which we show in Fig. 3. The swivel permits the joint toyield to the curvature of the pulleys while the ratchet holdsthe parts from revolving on each other and untwisting the The Hunt coupling is made smaller in diameter than therope with which it isto be used, in order that it may not. An Invitation to Strike. Some workmen who are careless make a practice of strik-ing the vise of ashaper upon the ends to bring It up square,using a hammer or anything else that happens to be bandy,thus bruising the sliding surfaces and in a short time piac-tically>ulning the vise foreiBcient work. The evil effects thusproduced are very plainly shown on the engraving of an oldrice subjected to just such usage, which can be seen In thevise marked Without. To prevent this, Gould & Eber-hiirrtt, the prominent machine tool builders of Newark, . have been making the new and original style of vise-liowu above the old vise, which is furnished with all their-Impers of latest design, and which does not lessen theiriistfulnesa nor reduce their capacity. hi this vise. is made whereby It may be tappedon cluend iui- -ijih liiif aiijustment as may be required [DHU-STPlhf IHER* IL
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
