Patent GB-191024782-A (GB)
Title: Improvements in or relating to Machines for Assembling Parts of Boots and Shoes.
Inventor: BOULT ALFRED JULIUS
IPC: A43D75/00
Filed: 1910-10-25
Granted: 1911-10-25
Abstract: 24,782. Boult, A. J., [United Shoe Machinery Co.]. Oct. 25. Assembling parts.-Machines for assembling parts of boots and shoes, particularly of the type described in Specification 20,010/05, are provided with means for varying the position and angularity of the nail which is driven into the back of the shoe, and, in some cases, with means for driving more than one nail into this part of the shoe. The shoe is supported on a pin carried by a jack post 8, Fig. 5, vertically adjustable by means of a sleeve 16 in a pivoted support 6. The sleeve 16 rests on a slotted portion 20 of a pivoted bracket 22, which is adapted to be raised during the operation of the machine by yielding pressure-devices controlled respectively through rods 70, 90, from the main shaft. The jack is started backwards into the machine by the operator, and, through the yielding connexions 30, 33, 34, 32, this movement depresses a starting-rod 52 and throws a one-revolution clutch on the main shaft into gear to drive the machine. This raises the pressure - rod 70, causing a bell-crank lever 76, 80 to engage a depending arm 82 of the rod 30 to draw the jack the remainder of the way into the machine; at the same time, the movement of the rod 70 tensions a spring 72, which presses upwards against the bracket 22. Later, the rod 90 is actuated to cause a heavy spring 100 to exert additional pressure on this bracket, to force the shoe against the wiping-devices. The shoe is positioned against a yieldingly - mounted V- shaped rear gange 108, Fig. 2, carried by a fixed guide-rod 112 so as to be entirely independent of any other parts of the machine; adjustment is provided for both vertically and horizontally. The sides of the shoe are engaged by geared members 118, Figs. 4 and 8, as in the previous machine, while the rear end of the last is drawn for a short distance under the wiper 128, which is furnished with an extended tip 130 serving as an indicator to assist in centring the shoe. The rear tack is driven by a driver 134, Figs. 4 and 8, working in a forwardly and upwardly inclined support 136, which is adjustable vertically in a guideway 138 in a head 140. The head is mounted so as to be adjustable transversely of the last in a swinging table 164, which has a downwardly-projecting tongue in engagement with a circular slotted guide 162 in a stationary base 2. This base is formed with a second guideway 166, concentric with the guideway 162, to receive a projection from a block carried by a bracket 150, to which is pivoted a spring-controlled tack-driver arm 144. The arm 144 is operated from a cam on the main shaft, and is formed with an extended driving-face 146; the connexion 147 between the arm and the driver 134 permits relative vertical adjustment between them without interfering with the operation of the machine. When it is desired to omit driving the tack, a loose pin 151 is inserted through the bracket 150 in front of the driver arm 144. The wiper 128 and the members 118 are mounted on a carriage 174, Figs. 2 and 4, which is secured to rods 172, and is moved forwards against the action of a spring by the engagement with a cam on the main shaft of a roller 176 carried by an adjustable slide on the wiper carriage; this is formed with a guideway to receive adjustably a rod 133 carrying a heel-block or counter-gauge 132. After the insertion of the rear tack, the carriage is moved forwards, and, with the aid of the additional pressure due to the rod 90, the operation of wiping over the upper, counter, and lining is completed. A vertical tack-driver 186 mounted on the carriage 174, and operated by a spring- pressed arm 188, then drives a tack through the upper &c. into the insole. Figs. 9 and 10 show the internal construction of the tack-driver 186. The driver is guided in a block 198 having a separate face-plate 200, upon which is pivoted a lever 202 provided with a roller 204 adapted to travel in a cam-groove 206 in the front of the driver. The lower end of the lever 202 engages a fork 208 on a reciprocable slide 210, which carries a dog 212 for feeding a tack strip. The tack throat is formed in a block 214 removably held in place by a spring - pressed slide 216. Fig. 12 shows a modified construction in which two rear tacks are driven. A double tack nozzle 137*, 138* is mounted at the forward end of the support 136*, which is adjustable in a curved slot 141* in the head 140; the slot is approximately concentric with the curved rear end of an average last.