Patent GB-190516608-A (GB)
Title: Improvements in or relating to Machines for Preparing Lasted Boots or Shoes for Sewing.
Inventor: BOULT ALFRED JULIUS
Filed: 1905-08-16
Granted: 1906-04-12
Abstract: 16,608. Boult, A. J., [Hadaway, J. B.]. Aug. 16. Preparing lasted boots for sewing; nailing.- Relates to a machine for simultaneously removing the lasting-tacks and inserting holding-tacks in a lasted boot or shoe so as to prepare it for sewing, the machine being, in addition, provided with means for moistening the sole channel: The moistening means may, however, be omitted; or, it may be fitted to a machine which only performs the operation of removing the lasting-tacks. The tack-withdrawing devices consist of a number of bifurcated and undercut claws 4, formed integral with the links of a sprocket chain 5, which is driven by a wheel 6 adjustably secured to a cam 7 on the main shaft 8. The chain passes round a pulley 11 at the end of a pivoted lever 12, which is actuated by the cam 7 so that each claw has an upward movement imparted to it as it engages a tack. The tacks are afterwards removed from the claws by a rapidly-rotating brush 19, which sweeps them into a hopper 23. Adjusting-means ara provided to take up wear in the sprocket chain or its driving-wheel. The shoe is presented to the machine with the tacks bearing against the periphery of a rotatable, saucer-shaped work rest and gauge 26, which is mounted on an inclined shaft so as to ensure that the claws 4 will properly engage beneath the heads of the tacks. In addition to this gauge, a fork-ended down-hold 27 is provided to bear against the shoe upper inside the line of tacks, Fig. 15. The tack feeding and driving mechanism is of usual construction, the plunger head 30 being, however, provided with washers 31 so as to regulate the distance the tacks are driven into the work. The plunger is forced down to drive a tack by a pivoted arm 33, which is lifted against the force of a strong spring 36 by a spring-controlled dog 38 on a lifting-lever 39 by depression of a treadle. A trip throws the dog out of engagement with the arm 33 when the plunger has been sufficiently raised. The tacks are supplied from a hopper 46, Fig. 13, which is fitted with a slotted tack-lifting blade 52. This blade is arranged to oscillate through a slot in the inclined base of the hopper, and is secured to the lever 39 so that it is actuated simultaneously with the dog 38. The movements of the lever 39 are limited by stops. The end of the tack-driving nozzle 29 is bevelled off, and one side of it is notched so as to allow the heads of the holding-tacks to pass through it as the shoe is moved along. The water for moistening the sole channel is supplied through a delivery pipe 59 from a tank 57. This pipe is secured to a pivoted arm 60, which is normally held by a spring in such a position that the lower end of the pipe is below the downhold 27. The liquidsupply valve 62 is located in the nozzle of the tank, and its stem is connected by an arm 63 and link 64 to an arm integral with the arm 60, so that the upward movement of the pipe 59 when a shoe is placed in the machine opens the valve. The opening movement of the valve is limited by an adjustable stop 66, but a continued upward movement of the pipe 59 is permitted by providing a pin-and-slot connexion at one end of the link 64, as shown. In the operation of the machine, the shoe in being placed against the work-support raises the pipe 59 so that water from the tank 57 flows into the sole-channel. The shoe is then moved a!ong so that the claws 4 withdraw the lasting-tacks, and, when it reaches points at which it is desired to insert a holding tack; the operator depresses the treadle and starts the tack-driving mechanism.