131,172. British United Shoe Machinery Co., (United Shoe Machinery Corporation). Aug. 23, 1918. Ornamenting; edge-setting. - In a stitch-wheeling machine, a tool-carrying head 12, Figs. 1 and 2, bolted on the end of an oscillating shaft 10 has formed in one of its sides an arcuate slot 13 to receive a boss 14 on the inner surface of one of two spaced vertical plates 15, which are rigidly connected together by a rib 151. Side plates 17 are secured outside the plates 15 to the head 12 by bolts 18, one of which passes through an arcuate slot 21 in the plates 15; a pinion 9 mounted in the plates 17 and operable by a knurled head 20 gears with rack teeth 16 on the curved rear ends of the plates 15. Between the plates 15 and on the rib 151 is slidably mounted an indenting-wheel carrier 22, which is adjustable longitudinally between the plates against the reaction of a spring 27 by a screw 24. The indenting wheel 31 may be withdrawn from operative position by drawing back the screw 24 to its utmost extent, and is held retracted by the engagement of a tooth 29 on a spring 30 with a notch 28 in the carrier 22. A combined edge-setting iron and support 23 fits closely in the space between the lower ends of the plates 15 and the head 12, and is supported against longitudinal thrust by a rod 321. This rod is slidable in bosses 33, 38, and carries a pinned collar 34 which is forced by a spring 35 against a knurled sleeve 36 adjustably mounted in the boss 38; a spring- pressed locking-plunger 39 engages the teeth on the sleeve. The edge-setting iron 23 is held firmly against the head 12 and the rod 321 by a spring 32 engaging a notch 33', Fig. 5, in the iron; when a change of iron is desired, a sharp blow on the rear end of the rod will drive the iron past the spring 32 and out of the machine. The iron is formed with the usual bed 332, Fig. 5, and channel guard 333, the bevelled portion 334 of which forms with the bed 332 a notch into which the corner of the sole edge fits, and this bevelled portion, or a back portion 335 (where the iron is merely used as a support and the sole is thick enough to reach the back portion) supports the sole extension firmly against the thrust of the wheel 31. The centre of curvature of the rack teeth 16, Fig. 1, is located at the intersection of the working faces of the tools ; further, the journal of the wheel 31 is offset so that the operative surface of the wheel is parallel to the axis of the carrier 22. Gas pipes 40 are arranged to heat the iron and wheel.. In some classes of work the stitch wheeling may be done with a blank iron serving as a support, instead of an edge-setting iron. Fig. 7 shows such an arrangement, the iron comprising two blocks 231, 2311 connected for adjustment by a screw bolt. This figure also shows a modification of the adjusting mechanism for the indenting wheel carrier. In this case, the rod 24 is not threaded but carries a lever 241 which, in the position shown in full lines, is seated by the spring 27 on a nut 26" threaded into a block 25' on the plate 15; when the lever is turned into the position shown in dotted lines, the carrier may be withdrawn.
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