Patent GB-190929988-A (GB)
Title: Improvements in or relating to Automatic Embroidering Machines.
IPC: D05C11/16
Filed: 1909-12-22
Granted: 1910-06-02
Abstract: 29,988. Vogtlõndische Maschinen-Fabrik vorm. J. C. & H. Dietrich Akt.-Ges. Dec. 28,1908,[Convention date]. E m b r o i d e r y machines ; perforating.-In embroidery machines, in the changing-over operation from embroidering to perforating, the needle-bars are brought to a standstill earlier than the other parts of the embroidery devices, which are kept moving until the frame is positioned in front of the perforators. The needles a are reciprocated by a cam-rod 25 and a camridge 26 on a disk 39. The disk 39 is normally coupled by clutch members 37, 38 to a wheel 2 which gears with a wheel 3 on a driving-shaft 4. The perforators b are linked with a continuously reciprocating lever 49, and are rendered operative when a slide block on the end of a rod 50 is moved outwards in a slotted arm 48 of the lever 49. The Figure shows the mechanisms as positioned during the embroidering operation. In the change-over, the following sequence of operations obtains. A rod 12 under the control of the jacquard is moved to the left, and pushes a rod 13 before it. A rod 16 continuously reciprocated by a cam 15 is carried by the rod 13 to the left, and a pawl 14 thereupon commences to rotate a wheel 17. Immediately a segmental rib 18 passes behind a pin 19 on the rod 13 and prevents the return of the rod. In the first movement of the wheel 17, a bowl on a slide s reaches the point 1 in a cam-groove on the wheel 17 and the slide is depressed. A cam-slot 20 presses a rod 21 to the left and lifts a rod 22 from a slot 27<1> into engagement with a constantly-reciprocating lever 23, which carries it downwards and thereby turns a lever pivoted at m to the rod 25, moves a bowl 24 into the position shown in dotted lines, and renders the needle driving- gear inoperative. As the point II of the cam 17 passes to the bowl, the slide s is further depressed and the rod 22 is moved from engagement with the lever 23 to rest upon a stop 27. From II to III the cam is concentric. The point IV further depresses the slide and thereby moves the rod 28 to the left. This couples a rod 31 to a lever 32, and also couples a rod 29 to a lever 30. Movement of the rod 31 removes a detent-lever 44, and a rack-rod 45 is moved by a spring into contact with a cam 11. Thereby a cam 47 is rotated and the rod 50, by means of a cam-rod q, is moved into contact with an operative part of the slotted lever 48. The point to which the rod 50 is moved is dependent upon the cam 11 which limits the movement of the rod 45, and this cam is previously set by a rack-rod 10 under the control of a jacquard needle 9. In moving to the left, the other rod 29 carries a brake-block 34 into contact with the disk 39, a plate 35 into the path of a bowl 36 on the coupling 37, and a hook 41 into the path of a tooth 40 on the disk, thereby disconnecting and stopping at a predetermined point the disk 39 by which the remainder of the sewing-parts are stopped. Point V of the cam 17 then depresses the slide s far enough to bring the rod 28 back to the right and anchor the rods 29, 31 on the stops, which hold them in the positions referred to above. When the cam 17 has been rotated through half a revolution, the bar 13 escapes to the right and the pawl 14 is removed. In the change back again, the needle 12 causes a further half-revolution of the cam 17 and the movements occur in the reverse direction. In addition, when the rod 29 is moved to the right, as it frees the disk 39 and provides for the re-coupling of the disk to the wheel 2, the end of the rod engages a toothed wheel 53 and gives an initial movement to the disk. During the perforating operation, the rack 45 &c. are under the control of a jacquard needle 52.