Patent GB-190408651-A (GB)
Title: Improvements in Machines for Emptying, Filling, and Threading Lace Machine Carriages, and Placing the Carriage Spring on the Bobbin.
Inventor: RICHMOND JOHN CHARLES
Filed: 1904-04-15
Granted: 1905-03-23
Abstract: 8651. Richmond, J. C., Birkin, T. S., Birkin, C. W., and Pare, F. W. April 15. Lace bobbins, removing from, and inserting into, carriages. - Relates to machines designed to remove an empty bobbin from a carriage, insert a full bobbin, place the carriage spring on the bobbin, and thread the carriage and deliver it ready for use. The carriages are advanced by a main slide 5, Fig. 3, on the machine table, driven from a cam shaft through rack teeth, gear-wheels, a toothed sector, and a side cam. The carriages stand in a frame on the table, and two vertical rods 19 pass through the pegholes. The lower end of the frame has side openings, through which may pass a plate 20 attached to the main slide. This plate is guided at its free side by a fixed strip and hasarecesswhich takes along the lowest carriage, as the plate advances. A spring catch holds the carriage in place and yields as the main slide returns. The carriage is fixed i the bobbin-removing position by the entry of conicalended pins 22 into the pegholes. The pins slide in collars 29 and in the lower part of a pivoted bracket 23, Fig. 6. Each pin has a collar 28 and two springs. The lower springs 31 lift the pins out of action, while the upper springs 30 transmit in a yielding manner a thrust imparted to collars 29 by cam-actuated levers 27 or sliding cams. The other sliding bobbinremoving or inserting instruments are similarly constructed and actuated. Rocking bobbin-removing instruments comprise a lever 40 for acting on the top part of the bobbin, a point 41 for removing the carriage spring and a rod 42 for pressing out the bobbin. A stop-motion lever 44, hanging from a lever 43 connected to a cam-lever 60, Fig. 1, acts when the bobbin has not been removed. The lever 44 falls after each removing-operation and, if stopped by an unremoved bobbin, leaves a pin 62 in the path of a side cam 64, which shifts the shaft 59 endways, rocks the bell-crank catch 66, releases the spring-pulled starting-lever 17, and withdraws the friction cone 16 on the cam shaft 7, from the clutch arms 15. A second feeler may act on the carriage spring to stop the machine if the carriage is the wrong way up. The empty bobbin slides down a shoot 69 into boxes or cases on a receiving table with a step-by-step motion. According to the Provisional Specification, a stop-motion may be actuated if the bobbin fails to pass down the shoot, and so move a lever clear of some moving part of the mechanism. The next movement of the main slide takes the empty carriage to the bobbininserting mechanism. It is there fixed by spring pins 22, Fig. 6. Filled bobbins, strung on a standard 76, are fed, one by one, by an inclined plate attached to a cam-actuated block 78 and having a verge on the recessed front edge. To prevent entanglement, the threads lie over a suitably-driven inclined fluted card or bristle roller 100. The moving slide permits a spring lever to nip a few of the lower threads, while a few of the lower bobbins are held firm by a cam 92 and pivoted lever 91 acting by means of inclines on sliding spring pushes abutting on the bobbin edges. The lowest bobbin is pushed into a frame composed of upper movable pieces 33 and fixed under pieces 104. The latter are let into the table and have suitable inclined edges for directing the bobbin on to the carriage verge. The Provisional Specification describes an arrangement of an upper overhanging part, a lower plate carried by or sliding vertically with a bobbin-inserting pin, a pressing spring, and a pad. Fig. 6 shows a bobbin-inserting pin 106 sliding vertically in a horizontal slide 108, connected by slot and pin 115 to actuating-slides 110 on each side of it. A brake ordinarily prevents the slides 108, 110 from moving together at first, hence the slide 106 rises in cam-slots 114 until the pin 115 arrives at the end of its slot, after which the slides 108, 110 move as one piece. This compound movement of the slide 106 inserts the bobbin. If the latter offers resistance, the slide 106 does not rise. A lever 116 mounts an incline and raises the top end of the bobbin. The carriage spring is then slipped on the bobbin by an adjustable pin on an arm which rests on a cam carried by a cam-actuated slide, the first movement of which raises the pin into contact with the bobbin, while a second movement takes it across the bobbin until it pushes the carriage spring over the edge, when it flies into place. Meanwhile a presser-foot 104 holds the bottom down. The thread from the bobbin is then moved into engagement with a threading-hook 124 carried on a vertical cam-actuated slide 125, by means of a pivoted thread lever which subsequently actuates a thread-cutting device for removing loose ends. After threading, the carriage is delivered by clipping-mechanism attached to a plate 136 or pivoted lever which is driven from the main slide by a link which may be slotted. A spring clipping-pin 138 is pivoted to an arm 137 which also carries a spring wire with a pin for taking hold of the bobbin centre. This is for removing the bobbin when not properly inserted. The carriages eventually drop off the table, down a shoot, and into suitable boxes on a receiving-table, which is moved step by step by broken worm gear, a cam-actuated toothed sector, a bevel-wheel, and a pawl on its shaft, which drives a ratchet on the underside of the table. Another cam moves a detent into or out of engagement with the ratchet.