GB190709670A - Improvements in or relating to Lasting Machines. - Google Patents

Abstract

9670. Roberts, F. W., and Ward, A. April 25. Lasting. -Relates to lasting- machines in which. the pincer-bar is given a combined lateral and twisting or rolling motion of a yielding nature, in addition to the usual spring control for the updraw, and consists in the provision of a single yielding-controlled operating means for actuating the pincer-bar. The pincer-bar a, Figs. 1 and 4, is suspended as usual by a ball joint a<1>, and passes through a cross-head c, which comprises tubular sleeves c<1>, c<2> arranged at right angles to each other. The sleeves c<2> are mounted in bearings in a two-part yoke d, d<1>, adapted to be reciprocated from any suitable part of the machine to effect the lateral throw of the pincers. They are, surrounded by bushes f formed on brackets f<1>, to which is secured a rack g meshing with teeth a<2> formed on the pincer-bar. A rod or spindle e', adapted to be reciprocated by a rod e, passes through the sleeves c<2>, and carries a pin e', which is engaged by the forked end i<1> of a rocking piece i. This normally bears against the lower side of a lever h, which rests on pins h<1> projecting from the cross-head c and is acted upon by an adjustable spring located in a hollow nut c'. When the spindle e<1> is reciprocated, the pin e<2> rocks the piece i, which tilts one end of the lever h against the pressure of its spring. This causes the other end of the lever to bear on its pin, and to move the cross-head c and consequently the pincer-bar a to one side and across the rack g. The twisting or rolling motion thus produced is consequently always of a yielding nature. The machine is also provided with an improved arrangement of grippers. The pincer-bar carries a sleeve k provided with extension rods k<1>, which pass through the crosshead c and terminate in a connecting-plate k <3> beneath a stop a<3> on the bar a. The movable jaw b<1> of the grippers is carried by a rod l carrying a collar l<2>, which seats against the plate k<3>. The jaw b<1> is thus caused to rise and fall with the rods k<1>, while the pincer-bar and grippers are always free to rotate. An embracing plate b<2> secured to the bar a serves to keep the jaws b, b<1> of the grippers in alinement.