GB720370A - Apparatus for the automatic production of endless loops of wire from wire stock - Google Patents

Abstract

720,370. Making wire loops. DUNLOP RUBBER CO., Ltd. July 11, 1952 [July 20, 1951], No. 17223/51. Classes 83 (2) and 83 (4). Apparatus for forming loops of wire for cycle tyre beads comprises one revolution means for forming and shearing a wire loop and transfer means for moving the loop to welding and flash removing means. Hoop forming and shearing means 20 constructed as set forth in Specification 720,368, is positioned between welding units 21 constructed as set forth in Specification 720,367, which are disposed between flash removing units 22 constructed as set forth in Specification 720,369. A transfer mechanism comprising arms 172 on an oscillated shaft 23 moves formed loops alternately to the right and left of the former to welding and flash removing means. Transfer means. A shaft 23 is oscillated with harmonic motion by rack mechanism; Fig. 17 (not shown), from shaft 39 of the loop former. Radial arms 172 on the shaft 39 carry clamping jaws 203 on slides 174 operated by push-rods 176 to move the slides radially. The fingers for the centre pair. of grippers are actuated mechanically by a push-rod 191 moved by a cam, Fig. 18 (not shown), to actuate a gripper control rod. Operation. The wire is fed from reel 24 to the former clamped, wound and sheared. The fingers 175 move on radially to grip the loop and to remove it from the former. The former then rotates to wind the next loop and the arms 172 move clockwise to transfer the first loop to the left-hand welder. The second loop taken by the fingers on the next arm and the next loop is wound. The arms 172 move the second loop anticlockwise to the righthand welder whilst the first loop is being welded and the arm 172 returns from the lefthand welder to the former. The next loop is formed and the third loop is moved clockwise to the left-hand welding head and the first loop is carried to the left-hand flash remover. At this time the second loop is welded by righthand welder. The former winds the fifth loop and the arms rotate anticlockwise to move the fourth loop to the right-hand welder, the third loop is welded and the second loop taken to the right-hand flash remover whilst the left-hand flash remover operates on the first loop. The operations continue until the completed loops are discharged at the rear of the machine.