Patent GB-112083-A (GB)
Title: Improvements in Darning and Weaving Devices.
Inventor: FYFE CHARLES MALCOLM
IPC: D05B3/24
Filed: 1917-04-19
Abstract: 112,083. Fyfe, C. M. April 19, 1917. Darning.-A darning machine comprises a workholder B, Figs. 1 and 3, which has step-by-step movements in one direction during which warp threads are laid by a reciprocating needle 24. The work-holder is then turned through a right-angle and has step-by-step movements in the opposite direction during which the weft threads are inserted by the needle. The work-holder has a non- circular base 3 which is constrained to move in a slot 2 in the base of the machine and can turn only when it reaches the recessed sides 4, and is actuated by a cord 11, Fig. 7, attached to the holder and to a pulley 9 and passing over a fixed pulley 15. The pulley 9 is driven by a spring which is wound up when the holder is placed in position for starting sn operation. The movement of the holder is controlled by a star-wheel 5 and escapement 8 acting on the racks 6, 7. The escapement is operated by a rod 34, lever 35, and tappet 36 on the needle-carrier C. The needle 24 and reel 23 are carried by a frame C which reciprocates in a slot 21 in the machine under the action of a lever 25, link 29, and crank 30 on a shaft 31 driven from the main shaft through suitable gearing. An arm 47 on thii; shaft actuates a lever 44 which is connected to the foot of a vertical post 42 to the top of which is connected the shuttle-driving rod 40. The shuttle-carrier D slides in a guide 37 which is slotted at 38 for the passage of a pin 39 carried by the red 40 and connecting with the shuttle-carrier. The work-holder also carries heddle mechanism which comprises a rod 50<a>, Fig. 5, mounted in suitable bearings near the top of the work-holder, and a rod 50 mounted in bearings on a bracket 53 pivotally secured at 54 to a post 55 moving with the work-holder. These rods carry fingers 56<a>, 57a and 56, 57 respectively, the fingers on each rod being arranged alternately on opposite sides. The rod 50 also has an arm 58 connected detachably to a rod 60 which passes down through the work-holder and is connected to a lever 61 carried by a cock-shaft 62 which has a crank-arm 63 at one erd. During the first part of the movement of the work-holder, while the warp threads are being laid, the heddle mechanism is not actuated, but when the work-holder is turned preparatory to the second part of its movement for laying the welt threads, the crank-arm 63 enters a slot 64 in a vertically reciprocating plate 68 which is connected by a link 69 to one arm of the bell-crank lever 70, the other end of which is connected to a sliding bar 72 which is provided with two projections 75, 78. A disk mounted on a shaft 79, which is driven from the main-shaft, has a projection 74 which acts on the projection 75 to move the bar in one direction, and a projection 76 which acts on the projection 78 through a bell-crank lever 77 to move it in the opposite direction. The work w is held on the holder by an elastic band 19. In a modification, the work-holder and associated devices are used in connexion with a sewing-machine having a vertically reciprocating needle, the escapement and heddle mechanism being actuated by suitable connexion with the main shaft of the machine.