Patent GB-190521171-A (GB)
Title: Improvements relating to Machines for Tacking Shoes.
Filed: 1905-10-18
Granted: 1906-10-18
Abstract: 21,171. Lake, H. H., [Boylston Manufacturing Co.]. Oct. 18. Lasting; nailing.-Relates to a pulling-over and tacking, nailing, or pegging machine, in which the tacking-mechanism, while still being controlled manually, is set in motion by the manipulation of the shoe instead of by a lever or treadle. The shoe to be lasted is presented to the machine so that the edge of the upper projects between a tack-delivery nipple 21 at the lower end of a sliding nipple-bar 20, and the end of a gripping- lever 22 pivoted to the bar 20. The gripping- mechanism is mounted in an overhanging part of the machine frame, to provide a free space for the manipulation of the shoe. By depression of a treadle, the upper is gripped between the nipple 21 and the lever 22, after which the shoe is given a forward and upward rocking motion so that the insole b bears against a rounded shoulder 220 on the lever 22. This causes the upper to be well pulled over the edge of the insole. The shoe is then rocked backwards again, and then pressed upwards so as to raise the bar 20. A projection 24 on the nipple-bar is connected through an adjustable stud 74, and links 73,70, to a tack-feeder 53, Figs. 5 and 9, which is adapted to slide to and fro across the bottom of inclined tack-races 50, down which tacks gravitate from tack-pots 51, of which there are two. The tacks are normally held back by the inner faces of inclined separating- fingers 55, but, when the bar 20 is raised, the feeder 53 slides forward and transfers the lowest tack from its race to the bore 60 of the bar 20. At the same time, the projecton 24 also trips a spring- controlled latch 30, and causes a lever 28 to withdraw a spring bolt 25 from its engagement with a stop 26 depending from the main shaft 12, thereby allowing the shaft to be clutched to the continuously-rotating pulley 14. A crank-pin projecting from a disk 15 on the shaft engages a slot in a driver-block 19, so that, as the shaft rotates, the driver is caused to descend and drive the tack from the bore 60 into the shoe. The latch 30 is so adjusted that, when the bar 20 has reached its upper extreme, the latch rides off the projection 24, and allows the plunger 25 to be returned by its spring to its former position, where it unclutches the pulley 14 and stops the shaft 12 at the completion of a revolution. The shoe is then lowered and shifted to another position, and the operation repeated. The tacks used are either long or short according as to which of the races 50 are in position to register with the bore 60, the change from one position to another being effected by moving a hand-lever 78, Fig. 5. The races are connected together at their lower ends by a plate 66, and at their upper ends by a plate 67, which is supported on a swivelling bracket 68. This bracket also supports the tack-pots 51, each of which is provided with a gear to mesh with a pinion on the shaft 12. As the tack-pots rotate, the tacks are lifted by vanes and dropped into the races 50, where they are straightened, and the superfluous ones brushed off, by wipers. A pin and cam-slot connexion is provided between the driver-bar 1 and the block 19, in order to vary the depth to which the tacks are driven into the shoe. A spring 98 is provided to absorb the shock of the blow delivered by the driver-bar.