Patent GB-190728399-A (GB)
Title: Improved Automatic Scalloping Embroidery Machine.
Inventor: PARKES WILLIAM NELSON
Filed: 1907-12-24
Granted: 1908-05-07
Abstract: 28,399. Parkes, W. N. Dec. 24. Ornamental-sewing machines; feed. -Relates to a machine for sewing scallop embroidery. To produce the requisite relative motion between the stitch - forming mechanism and the work, the machine frame 2, Fig. 2, carrying the former, and the work - carrying frame 145 are moved on tracks 72, 138 at right-angles. The needle is vibrated to and fro laterally in two steps, one long and one short, and cords or other fillings 247, 248 are fed under the stitches, as shown in Fig. 26. The machine is automatically stopped by a lug 227 on the work-carrying frame, or by a device acted upon by a knot in the needle thread. The mechanism for moving the machine frame and the work-frame is shown in Fig. 9. The machine frame, which is mounted on wheels 114 and moves over rails 72, Fig. 8, is linked by a pitman 110 to a slotted quadrant 98, which is oscillated by engagement with a slide 94, reciprocated by a cam-groove 91 in a ratchet-wheel 90. The work-carrying frame is provided with a rack 141, and is progressively shifted by a gear-wheel 118 of a wheel tram 118, 117, 116, 67, which is actuated by a ratchet-wheel 65. The ratchet-wheels 65, 90 are rotated by pawls 64, 89 on levers operated by pitmans 60, 61, which are connected to separate quadrant arms 56, 57 of one lever. The lever is carried by a shaft 52, Fig. 2, journaled in brackets on the fixed platform, and is oscillated by an eccentric-actuated lever 43, mounted upon the moving machine frame. The lever 43 has two arms having rollers 49, which engage with a lever on the shaft 52 having a long arm parallel with the direction of motion of the machine frame. At the beginning and ending of a pattern, the feed is interrupted for the formation of a tack by a bar 123, Fig. 9, which disengages both pawls 64, 89. Needle-bars, vibrating laterally.-The needle is mounted eccentrically on the needle-bar 37, Fig. 8, which is oscillated by a lever 33, pivoted concentrically with the needle-bar, by means of a rod 38 carried by a lever 36 fixed to the needle-bar, which slides in a bore in the lever 33. The lever 33 is connected by a pitman 30 to a lever 28, Fig. 24, which is oscillated by a pitman 27 connected with a slide-block 24, Fig. 2, reciprocated upon a vertical pin 25 by a crank and pitman connexion with a ratchet-wheel. The ratchet-wheel has four teeth, and is rotated a quarter of a revolution at a time by a pawl gear 10, 11, 16, 17, and a crank-disk 8 on the back of the machine head. For sewing the long and short lateral stitches, the pitman 27 is adjusted to move the lever 28 between the three positions shown in Fig. 24. When the pitman 27 is adjusted so that the extreme positions of the pitman 30 are symmetrically disposed with regard to the pivots 29, ordinary zigzag stitching is produced. Cords, applying.-A filling is guided under the long stitches through a perforation in the presserfoot. An oscillating looper 177, Fig. 8, guides a filling under the short stitches. The looper shaft is journaled in the hollow presser-bar 166, and is provided at its upper end with a lever 181, which is actuated by a projection 186 on the lever 33 in opposition to a spring 182. Presser lifted automatically.-An eccentric-actuated lever 191, Fig. 2, engages a lug on the presserbar and lifts the foot off the work during the time of the feeding-movements. Stopping, automatic. - A lug 227 on the workcarrying frame 145 contacts with a lever 219 to tilt the weighted stopping-lever 216. This lever 216, in falling, lifts a spring catch 207 and releases the lever 200, which is pulled over by a spring. The cam-end 202 of the lever 200 ceases to bear upon the end of the driving-pulley 196, so releasing this pulley from frictional driving. contact with the flywheel 194, and a brake-block presses upon the fly-wheel and stops the machine. In the end of the stopping-lever, a detector lever 230, Fig. 30, is placed, through the eye of which the needle thread is passed. If the thread will not pass through the needle eye because of a knot or the like, the stopping-lever is pulled over and the machine is stopped. Work-supports.-The work is stretched over the work-carrying frame and held in position by rows of spikes, which are covered by plates 147. The work is stretched centrally by means of spring grips on the underside of centrally-disposed bars. A long roller carried by brackets on the frame supports the loose portion of the work. Spool &c. holders.-Conical houses are provided for the needle thread and fillings. The threads &c. are taken out through holes at the apices.