Patent GB-190920392-A (GB)
Title: Improvements in Method of and Means for Making Coiled Wire Fabric.
Inventor: SEFTON-JONES HERBERT
IPC: B21F27/04
Filed: 1909-09-06
Granted: 1910-09-06
Abstract: 20,392. Jones, H. Sefton-, [Lloyd, M. B.]. Sept. 6. Coiling; shearing.-Coiled wire fabrics are woven by placing two or more coils side by side and running- in interlocking coils. A machine for this purpose has five giraffes, two of which form interlocked reserve coils 2, 3, Figs. 35 and 42, and two of which run in interlocking coils 4 and 5 ; the fifth is normally inoperative and is for running-in a number of coils for forming cords 4<1>, Fig. 47, the first three giraffes being then out of action. After one set of coils have been run in and cut off, the coiling-mechanism is stopped and the take-up mechanism moves the formed fabric until the last coil 1 is at the edge of the weaving-channel B, whereupon the reserve coils are pushed by pins e close up to the coil 1, the coiling-mechanism then coming again into operation. The machine contains the following principal parts : wire tensioning and feeding mechanism ; the giraffes and coil guides ; the cut-off mechanism and weaving- channel ; fabric take-up and edge-trimming mechanism ; patterning-mechanism and mechanism for varying the lengths of the coils ; timing- mechanism ; and a stop-motion for the machines when the coils become tangled or when the tension of the fed-wire becomes excessive. The wire passes from reels K, Fig. 5, suspended from the frame of the machine and provided with guards or weights at the lower ends, through central tubes in the reels and then goes in loop form over upper and lower tension-sheaves to sheaves k, and thence to the feed-mechanism L, the last pulley being provided with an extra sheaf. The feed-mechanism consists of lower rolls L', Fig. 7, driven from the main shaft l<3> of the machine, and upper rolls tooth-driven from the lower rolls and mounted freely with play upon the stationary shaft l<4>. Each upper roll is carried by a lever l<7>, the free end of which engages a pin l<20> on a lifting-arm l<9> operated from a rock-shaft l<8> by a pin l<21>, a groove enabling the arm to be held up periodically by a cam l<13> when a cord wire is to be run in. The rock-shaft operates to stop the feed when the desired lengths of coil have been run into the weaving-channel. The cam shaft l<12> is operated by a pattern cam ; there is no cam corresponding to the giraffe j<4>, Fig. 5, and that corresponding to the cord-giraffe j<41> is of different form, so that, as the shift l<12> is operated, all the giraffes except the last two are kept out of action. Any particular giraffe can be put out of action by a jack block l<24> engaging a rod l<22> suspended from the pin l<20>. The feed pressure is obtained from springs l<6> engaging adjustable suspension rods l<61>. The giraffes, Fig. 13, are adjustable on the underlying plate j<7> by means of threaded spindles j<6>, and consist of spirally grooved spindles j<9> provided with guide wires and with an internal projecting coil-guide j<17> carrying an adjustment-arm j<18>. A shield and an adjustable sleeve j<15> are provided, the latter serving to decrease or increase the pitch of the coil. The coils pass under a guide-plate O, Fig. 5, to guides H and cut-off mechanism I and to the weaving channel B. The cutters are set inclined to the wires to enable easy transverse movement of the cut-off wires. The weaving-channel has a reciprocating closing-knife C and a number of pins d' mounted on a reciprocating bar D, such pins serving to keep in correct pitch relations the various coils in the channel. Transferring pins e<1> are mounted on a reciprocating bar E and move the reserve coils forward at the end of each coiling operation. Spring-pressed escapement bars b<4>, b<5>, Fig. 35, are provided in the channel, the bar b<5> being positively operated, by arms b<7>. The take-up roll F, Fig. 20, is driven intermittently through a clutch from a chain f<4> rocked by a cam-operated lever ff<7>, and a number of fingers are provided which engage the fabric and prevent it from being pulled off the pins in the weaving-channel. To equalize the tension at the various portions of the fabric, a number of spurwheels j<6> freely mounted on a shaft f<7> engage meshes in the fabric. The fabric is trimmed and crushed flat at the edges by reciprocating eccentricoperated cutters. The various cam shafts of the machine are driven from a shaft Q, Fig. 5, driven off the main shaft l<3>; this shaft Q drives a shaft s, Fig. 29, from which is driven, through the clutch ST, the shaft T that operates the wire-feed control and cut-off mechanism, and, through a further clutch n<2>, the shaft P that controls the channel members and take-up mechanism. The operation of the cam ST is obtained from a shaft U frictiondriven from the shaft Q ; a cam-wheel u<10> is driven from the shaft U and periodically trips a stop u<12> and allows a spring ts<5> to put the clutch ST into action, a cam ST<2> putting it out again after one revolution. The time that the clutch ST is out of action, and therefore the length of coil, is thus governed by the speed of the shaft U, this being controlled from a hand-lever u<6>. The pattern mechanism is operated by a pattern cam N<2> driven by a shaft V off the shaft U ; this cam operates a rod which actuates the pattern-cam shaft l<12>, Fig. 5, and at the same time puts the clutch n out of action. The main shaft l<3> is belt-driven through a clutch, the operating-lever R<11>, Fig. 32, of which is held in driving position by a pivoted spring catch r<1>. For stopping the machine, there are two pins which engage this catch ; one, W', is operated by a spring-urged shaft, which is released when the tension becomes excessive on the lower guide sheaves for the wire ; the other, O<8>, is on a pivoted spring-pressed arm O<1> normally held up by an arm O<4>, the arm being moved by an electro-magnet whenever the coils become distorted and so making contact with the guide-plate 0, Fig. 5. Most of the driving-shafts are provided with hand-operating means to facilitate the seating of the machine.