Patent GB-701512-A (GB)
Title: Improvements in and relating to machines for manufacturing wire fabric
Inventor: WAKEFIELD JOSEPH ANTHONY
IPC: B21F27/04
Filed: 1950-03-15
Abstract: 701,512. Making chain-link fabric. DURAFENCING, Ltd. June 15, 1951 [March 15, 1950], No. 6458/50. Classes 83 (2) and 83 (4) Angular bending; coiling; shearing. - A machme for making chain-link fabric, of the kind in which wire is wound in zig-zag form on a flat mandrel rotated on a stationary giraffe, is provided with an epicyclic gear for driving the weaving spindle and the one revolution shaft and with control mechanism adapted to drive the spindle and the shaft alternately and to hold stationary the undriven member. Control mechanism.-A driving shaft B alternately rotates through an epicyclic gear 5, 6, 7 a weaving spindle C and a braked one revolution shaft D: When a planet pinion carrier 9 is locked the drive is through gearing B 4, 5, 8, 21, 23 to the shaft D and when the carrier is free and an annulus 8 is locked the drive is through B 4, 5, 10, 11, 12, 13 to a sprocket wheel 17 with chain carrying an abutment 19. When a cam 26 on the shaft D engages a lever 30 a rod 36 is swung by a cam 41 to lift a lever 33 and release a hook from the abutment 19. A spring 34 swings a lever 27 to engage projections 25, 29 to lock the shaft D and to release teeth 9 on the pinion carrier to free the carrier 7. Weaving.-This mechanism is of known form and comprises a weaving tube H with hinged front section 85 opened against spring pressure by a cam on the single revolution shaft. As the winding proceeds hooks on a shaft rocked by a cam on the one revolution shaft engage the fabric as the zig-zag wires are interlaced. Shearing.-The wire after coiling is sheared by single and double blades, Fig. 14, not shown, operated by opposed cranks rotated from the one revolution shaft. Knuckling mechanism.-The barbs on each edge of the fabric are bent back by similar adjustable mechanism comprising an anvil 81d raised and lowered by a cam from the one revolution shaft and a bender 78 which engages and bends the wires reciprocated by a crank. Winding mechanism, Fig. 10.-The fabric is wound constantly on a spindle 54 irrespective of coil diameter by an adjustable crank pin 103 rotated from the single revolution shaft and oscillating a bush 120 connected to the coil spindle 122 through a one-way drive 128. A shoe 115 supported by the coiled fabric slides freely on a rod 118 connected to the bush 120 to maintain constant the peripheral feed of the coil. Coiling, Fig. 8.-Wires 48, 49 are coiled on a blade F rotated from the gear 12, Fig. 3, within a giraffe G with a two start spiral slot inside a tubular support 44 with lubricating holes 45. The giraffe has counterbored ends into which the spiral slot extends to allow of reversal when worn. Operation.-The spindle C rotates when the single revolution shaft D is at rest to drive the Colling blade F upon which the wires 48, 49 are coiled and to feed the coil into the coaxial weaving tube H and to interlink the coil with the last link of the fabric. When the spindle C stops, the shaft D rotates to operate the shearing mechanism I, the knuckling mechanism J, and the winding mechanism. Specifications 701,537, 701,538 and 701,539 are referred to.