Patent GB-189712893-A (GB)
Title: Improvements in Nails, Tacks, and the like, and in Machinery for the Manufacture thereof.
Inventor: WATERMAN RODOLPHUS CUSHING
Filed: 1897-05-25
Granted: 1898-04-02
Abstract: 12,893. Waterman, R. C. May 25. Nails, tacks, and the like.- Relates to a special form of nail or tack &c., and to duplex or multiple machinery for its manufacture. Fig. 36 shows the nail. The head is flat, and the point, as shown in Fig. 32, which is a view at right-angles to Fig. 36, is formed by the meeting of two edges s<7> and s<6> respectively straight and curved in elevation, the apex of the point is axially placed, and the sheared face is straight in vertical section while the opposite side is curved, thus making the whole section of D form. These nails are cut from a wire which has an oval section imparted to it by the feed-rolls. Figs. 17 and 24 show plans of the left and right hand dies &c. for cutting the blanks shown in Fig. 2. In Fig. 17 the wire w is shown clamped to the fixed die l by the arm r<3>, the head end being clamped between the pieces k<8> and m, and the blank is sheared by the cutter k<5>. In Fig. 24 the wire w is shown clamped between the parts r<3> and l<1> and the head end by the yielding parts k<8> and m, while the blank is sheared by the cutter k<6>. The blanks are carried down by the parts k<8> and m to the grippers n, n<1>, Figs. 24 and 25, which partially form the head and shank, the blank shown in Fig. 2 being specially made with the end x inclined so that the shorter and weaker side y in expanding may not extend further longitudinally than the stronger side. A block q<2>, Fig. 25, acting on the inclined face n<3> of the die n<1>, bends the point to an axial position, and the head is formed by the punch p. Fig. 3 shows a sectional elevation of a machine for making the nails, and Fig. 4 a plan with certain parts removed. The wire w is fed and flattened at the same time by the rolls E<3>, rotated by a ratchet-wheel E' and pawls on the piece B<8> loose on the shaft E. The piece B<8> is connected by the rod B<7> to the slide B<5> sliding on the carriage B<4> against the action of a spring c<4>. The slide B<5> carries a roller c<5> bearing against the inclined bars d, d', pivoted at d<2>, and made of different lengths so that the feed is different for the right and left hand, mechanisms. The carriage B<4> is pivoted at b to the slide B<3> reciprocated on the bed A<5> by a link B<2> connected by a lever to the rock-shaft B, Figs. 3 and 4. The shaft B is rocked by a lever, connecting-rod, and adjustable crank H<2> on the shaft H in a similar way to the rock shaft C with lever C<2>, rod C<3>, and crank C<4>. The carriage B<4> is oscillated on its pivot b by the link b<3> and lever b<7> on the rock shaft C. The feed may be effected by the motion of the slide B<3> or of the carriage B<4>, or by both. The wire thus passes to the gripping-jaws f<2> , f<4>, Figs. 12 and 13, which lie in a groove in the piece F, the jaw f<2> being held by a fixed pin f<3> and the jaw f<4> by pins f<5> urged upwards in slots in the piece F by springs f<7> The fingers r<3>, Figs. 3, 17, and 24, are carried by an oscillating head R<3> actuated by a lever R<2> and ears R, R<1> on the rock shaft B. The cutters k<5>, k<6>, Figs. 3, 17, and 24, are carried by jaws K and the fingers k<8> by jaws K<1>. The jaws K, K<1> are actuated by springs and by wedges moved by cranks on the shafts D, H. The wedges have a recessed part, so that the clamping-fingers k<8> move down further than the cutters. The fingers m and q<1>, Figs. 17 and 25, are moved by cams. The movable dies n', Figs. 3, 4, 24, and 25, are carried by levers 0 pivoted at o and actuated by cams on the shafts D, H. The punches p, p<1>, Figs. 4 and 25, are carried by levers P actuated by eccentrics on a transverse shaft.