Patent GB-190703208-A (GB)
Title: Improvements in or relating to the Manufacture of Malleable Metal Articles and Means Employed in such Manufacture.
Inventor: HURDLEY THOMAS
Filed: 1907-02-08
Granted: 1908-02-10
Abstract: 3208. Hurdley, T., and Hurdley, T. C. Feb. 8. Rolling.-In a rolling- mill for manufacturing plate-spring backs, brake levers, and like articles and taper articles, the rolls a, a<1> are oscillated, and the amount of oscillation of the rolls and the pass are adjusted automatically so that the article is automatically rolled down in a number of stages by one pair of rolls. The rolls are oscillated by racks j<1>, Fig. 9, suspended by slings j<3> and guided on rollers j<4>, the racks being reciprocated from a shaft i<2> which is oscillated by a rack o, Fig. 1, on a cross-head n. The cross-head is mounted loosely on a traversing- screw m<2>, and is actuated through a trip lever n<1> by the engagement of a crosshead m with the screw. The trip-lever is operated by an inclined tripper n<3> connected to a gauge-plate n<4> coacting with a stop p, the tripper being urged in the direction of the arrow x by a weight or spring. The gauge-plate n' controls the amount of traverse of the loose cross-head n and so determines the amount of oscillation of the rolls ; the stop p is raised one step by ratchet or other means after each oscillation, and so engages one or other of the notches in the gauge-plate, thus altering the position of the tripper n<3>. When the roller n<2> on the trip-lever n<1> engages the tripper n<3>, the loose cross-head n is disconnected, and a catch q<3> on the cross-head m releases a pawl q<2> which engages a rack q mounted on rollers, by means of which the driving-means for the screw m<2> is reversed. The cross-head m then pushes back the cross-head n, the pawl being lifted up by a catch q<3> as the trip-lever descends, and the driving-means being again reversed by a catch q<4> engaging a catch on the loose cross-head. The pass between the rolls is automatically adjusted by the engagement of wedges d, Fig. 8, with the bearings b of the rolls, the upper wedge acting on the bearing of the lower roll and the lower wedge acting on a block d<2> connected by rods d<3> to the bearings of the upper roll. The wedges are rack-operated by a pinion h<1>, the movement of which is controlled by a rack h<2>, Fig. 4, connected to and reciprocated by a pivoted arm r<3>; movement of this arm is controlled by a gauge-plate u provided with notches u<1> of varying depth and with projections u<2> for rolling on edge. The arm r<3> is operated in one direction by a rack s<1> similar to the rack q, and in the other direction by a trip lever t<1>. The gauge-plate is lifted automatically by ratchet or other mechanism, and a trip-lever t<1> coacts with a tripper t<2>, connected to a pin engaging the gaugeplate, the tripper acting similarly to that previously described. Between each rolling action, the rolls are opened to maximum extent. In a modified construction, the racks j<1> are reciprocated by toothed gearing through a reversing-clutch, and in this case the travel-determining gauge-plate may be vertically movable and may be operated by a ratchetactuated cam.