Patent GB-800719-A (GB)
Title: Improvements in machines for making fringes
IPC: D04D5/00
Filed: 1955-12-16
Abstract: 800,719. Sewing machines. KONINCK, A. DE. Dec. 16, 1955 [Feb. 8, 1955], No. 36223/55. Class 112 [Also in Group XXIV] A fringing machine comprises a reciprocating eyed-needle 21, Fig. 4, a doubly-oscillating looper 32 for taking the loop from the needle, a looper 33 having a latched hook and adapted to take the loop from looper 32 and to carry it across the edge of the work to the needle for forming chain stitches, and a device which draws a part of the thread from looper 33 by means of a rotating hook and cuts said thread to form fringe tassels of the desired length. The needle bar 28 is coupled by a connecting rod 22 to a crank disc 23 on the end of the upper arm shaft 1, the pivoted connection between rod 22 and bar 28 being guided in a vertical channel 31. Looper 32, which is carried by an arm 45 pivoted on a horizontal and longitudinal shaft 41, is actuated by a three-armed lever 27, 38, 49 fulcrumed at 44. Arm 27 carries a roller engaged in a circumferential cam slat 51 provided on shaft 1 to impart oscillatory movement to said lever, arm 38 is connected by a link 35 to arm 45 to swing the looper 32 transversely to the direction of work feed, and arm 49 is connected by a link 47 and crank 50 to shaft 41 to oscillate the latter and thus swing looper 32 in the feed direction. Looper 33 is connected by an offset arm 51<SP>1</SP> to a vertical shaft 52 to which reciprocatory and oscillatory movements are imparted. A downwardly inclined transverse shaft 59 is rotatably driven from shaft 1 by means of gears 53, 55, a shaft 54, and gears 56, 57. An eccentric 60 on shaft 59 is connected by a pitman to one arm of a bell-crank lever 64 fulcrummed at 62, the other arm of said lever having a ball-end 63 engaged in a circumferential groove in a sleeve 65 carried by shaft 52, whereby the latter is reciprocated. A link is connected at its respective ends by universal joints 67 and 68 to the machine frame and shaft 52, whereby reciprocation of shaft 52 is accompanied by oscillation of the latter about its axis. The lower end of shaft 59 carries a disc 82 to which a radial arm 78 is adjustably fixed by means of a pin-and-slot connection 83, 84. A hook 70 is carried at the end of arm 78 and travels in the counterclockwise direction over the periphery of a fixed sector 71 for the purpose of drawing off a thread loop from the looper 33. A slide 86 is adjustably fixed in an annular slot 85, provided in sector 71, by means of a screwed pin 81 and nut 87. An arm 80, which is pivoted on pin 81, carries at one end a roller 98 disposed in an annular cam slot 100 formed in a disc 101 fixed to shaft 59, the other end of the arm carrying a blade 72 formed with a roughened tip 73 adapted to engage the edge of sector 71 when arm 80 is rocked about pin 81. Slide 86 also carries a knife blade 74 located between the edge of sector 71 and blade 72. A shaft 76 is journalled in a bearing 103 carried by slide 86 and is provided at one end with an offset finger 75, the other end of shaft 76 being coupled by gears to shaft 59. The arrangement is such. that hook 70 carries a loop of thread from looper 33 between the edge of sector 71 and blade 72, arm 80 rocks to trap the loop between tip 73 and the sector, while the continued movement of hook 70 carries the loop past knife 74 which cuts the apex of the loop to form a pair of tassels. After the stitch from which the tassels project has been set arm 80 rocks back to release the tassels which are then ejected from the space between blade 72 and the sector by the action of the finger 75. A pivotally mounted guard (see Group XXIV) is provided to protect the operator's hands from injury by the hook 70. Lubricating oil is distributed throughout the machine casing by means of a piston pump 108 driven by a linkage 109, 110 from the lever 64.