Patent GB-190321857-A (GB)
Title: Improvements in or relating to Nailing Machines.
Filed: 1903-10-10
Granted: 1904-10-06
Abstract: 21,857. Brown, J. H., and British United Shoe Machinery Co. Oct. 10. Nailing.-A nailing - machine, particularly for hob and largeheaded nails, i s provided with a carrier for transferring the nails from the shoot into position beneath the driver bar, consisting of a rotating turret, receiving nails at its circumference and delivering them at its axis by means of a number of radial passages. Means are also provided for driving the nails with the sides of the heads of adjoining nails either parallel or angularly disposed. The bar carrying the naildriver is connected to the link B', Fig. 2, and works in the sleeve H, H<1>, the work being placed upon the horn E. The cross-section of the narrow part or throat H<1> corresponds to the nail heads, and the position of the nail heads is varied by oscillating the sleeve H, H<1>, through either 45‹ or 90‹ at each stroke. The segment H<2>, Figs. 2 and 3, on the sleeve H, is rotated through 45‹ by segmental teeth H<6> on the pinion H<3>, which has also teeth H<7> in gear with the sector H<8> on the pivoted lever H<9>, the arm H" of which has a roller H<12> engaged by the cam groove H<13> in the disc H", on the vertical shaft H<15>, rotated by worm gearing from the main shaft A'. The rotation through 90‹ is effected by the pinion H<18>, of different pitch, which also gears with the sector H<8>. A flanged pin on the pinion H<3> engages an undercut recess on the pinion H<12>, and the two pinions are moved vertically to throw one or other of them into gear with the segment H', by the pinion H<25> engaging the worm H<5> on the shaft H<4>. The nail carrier or turret J, Figs. 3 and 11, surrounding the throat H<1> has four radial passages J<1>, preferably of the approximate shape of the nails. The end of the shoot S delivers a nail to one of the passages when the turret is at rest, and at the same time a nail is ejected from one of the other passages, through the opening H<32> in the throat H<1>, by the bar K, operated by the bell-crank lever K', Fig. 2, the arm K<4> of which has a roller engaging a cam groove in the disc A'. The turret J is intermittently rotated through 90‹ by mechanism shown in Figs. 9 and 11. On the top of the turret are two ratchetwheels J', J<3> each with four teeth, acting in opposite directions. The ring J<4>, surrounding the ratchet-wheels, gears with the wheel J<6>, rotated by the segment J<8>, pivoted on the shaft H<10>, Figs. 3 and 4. The other end is connected by the bolt J<10> to the extension J<9> of the arm H", the connection being rendered yielding by the spring J", so that should the turret be arrested by a misplaced nail, no damage would ensue. The pawl J", Fig. 9, in a recess in the ring J<4>, engages the ratchet-wheel J', rotating the turret J, and the pawl J<13> acts as a detent. The third pawl J<15>, carried by the ring J<4>, engages the ratchet-wheel J<3> to prevent the turret from being carried beyond the proper point. The pawls J<12>, J<15> are acted upon by the same spring J<16>. The extension J<17> of the pawl J<15> is engaged by the stop J<18>, raising the pawl to allow the turret to advance. The sleeve L<1>, Fig. 2, in which the bar K works, rotates and carries a curved arm L, the end of which engages a nail head, or the sole of the work, to feed the work. The arm L<2> on the sleeve L' is connected by the link L<3> to the lever L<4>, Fig. 4, which is pivoted on the eccentric part H<31> of the shaft H<24>. The roller L<5> on the lever L<4> engages a cam groove in the disc A<3>. When the handle H<28> is turned to raise or lower the pinions H<3>, H<18>, the eccentric H<31>, by lowering or raising the pivot of the lever L<4>, increases or diminishes the feed of the work. The link L<3> is preferably adjustable in length to adjust the feed in the first instance. The turret J may be provided with two diametrical passages, and may be oscillated through 180‹ to bring each passage alternately opposite the nail shoot and the delivery opening. The pawl mechanism may be replaced by friction gearing. The throat may be held stationary for one position of the nails, and oscillated for the other position. Instead of using the ejector K, the passages J<1> in the turret J may be inclined so that the nails pass through them by gravity.