Scientific American Supplement No. 819, September 12, 1891 eBook

This eBook from the Gutenberg Project consists of approximately 130 pages of information about Scientific American Supplement No. 819, September 12, 1891.

Scientific American Supplement No. 819, September 12, 1891 eBook

This eBook from the Gutenberg Project consists of approximately 130 pages of information about Scientific American Supplement No. 819, September 12, 1891.

Fig. 4_a_ is an elevation and Fig. 4_b_ a sectional plan of the tool for performing the fourth operation—­namely, removing the portion a*, Figs. 3, 3_a_, 4_a_, and 4_b_.  This is done by a pair of punches, A*, corresponding in shape to the ends of the link in the rough and to the aperture shown in the bed-die, k, Fig. 4_b_, which has a groove, k’, to admit the lower web of and to guide the rod.  The beveled stop, B*, used in operating on the pair of webs, a, corresponds to the notches, b’; but in operating on the webs, a’, the stop must be replaced by one corresponding to the aperture left by the removal of the portion, a*.

Fig. 5_a_ is an elevation, Fig. 5_b_ a plan, and Fig. 5_c_ a longitudinal vertical section of the tool for performing the fifth operation, the work being shown in section in the latter figure.  It consists of a bed-die, l, with groove, m, to receive the lower web, but terminating at a distance from the die apertures, so as to leave supports, n, for the parts, e*, of the rod to resist the downward pressure of the punches, E, which remove the portions, e, from each side of the cross stay, as shown in Figs. 5_b_ and 5_c_.  The correct position of the work in regard to the punches is insured by these supporting parts, n, which terminate the grooves, m.

Fig. 6_a_ is an elevation of the winch for performing the sixth operation.

Fig. 7_a_ is an elevation and Fig. 7_b_ a plan of the tool for performing the seventh operation.  P P are the punches for trimming the outside and Q Q those for trimming the inside of the ends of the links.  The links adjacent to the one to be operated on are brought together into the position shown in dotted lines, the bed-die having an aperture in it to admit of this, so that both ends of the link to be trimmed may be operated on together.

The tool for performing the eighth operation consists of a pair of swages, the bottom one only being shown in Fig. 8_a_.  The swages correspond to the intended rounded sectional form of the ends of the link, which is placed in position between the swages in a similar manner to that described for Fig. 7_b_, so that both ends are rounded or finished off at once.

Fig. 9_a_ is a plan of the bottom swage of the tool for performing the ninth operation, the upper swage corresponding thereto at least in so far as the middle part of the link to be operated on is concerned.

The tool for performing the tenth operation is represented in elevation and plan in Figs. 10_a_ and 10_b_.  It consists of a pair of bed-dies, R, fitted to slide together and operated by the cams, s, on the guide rods, S, the operation being similar to that of the tool shown in Figs. 2_a_ and 2_b_, except that there are no punches, and that the link which lies in the cavity of the dies is merely compressed in the lateral direction by the inward motion of the bed-dies.

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Scientific American Supplement No. 819, September 12, 1891 from Project Gutenberg. Public domain.