Patent GB-190423247-A (GB)
Title: Improvements in or relating to Boot or Shoe Supports used in Machines which Operate on the Bottoms of Boots or Shoes.
Filed: 1904-10-28
Granted: 1905-11-28
Abstract: 23,247. Gouldbourn, J., Jerram, A. E., and British United Shoe Machinery Co. Oct. 28. Boot-sole stitching-machines ; work-supports.- Relates to means for canting the work-support or horn of a boot-sole nailing, sewing, or like machine while the work is being operated upon. The shank B', Fig. 1, of a curved or elbowed horn B is carried in segmental slideways C, which are provided with a boss C<1> forming the upper part of a sleeve D mounted in the usual horn-supporting sleeve E. This latter is connected to and actuated by the slide F in the usual manner, and its endways movement is imparted to the sleeve D through an adjustable spring G, which allows the horn to yield slightly when it contacts with the work, to prevent damage. The sleeve D is fitted with a grooved collar D<2>, which is loosely engaged by pins on the end of a lever J pivoted to a projection F<1> on the slide F. This lever is also connected by an intermediate link K to a similar lever L, which is pivoted at one end to the machine frame and is provided at its other end with pins engaging a grooved collar H<2> on a rod H, which passes centrally through the sleeves D, E. This arrangement permits the sleeve E and horn B to be lowered to receive the work without the relative positions of the rod H and the sleeve D being changed. The horn is also lowered automatically to a lesser amount during the feed of the work by the action of a cam M and bell-crank lever N on the slide F. The upward movement of this slide, however, causes the pivoted end of the lever J to move away from the corresponding end of the lever L, thereby producing a relative movement between the rod H and the sleeve D, which movement causes the horn to cant. To effect this, the underside of the segmental shank B' is provided with a rack B, Fig. 3, which is engaged by a pinion 0 loosely mounted on a spindle P journalled in the boss C<1>. The spindle is prevented from rotating, but it can be moved longitudinally in either direction by an eccentric projection E<1> on the sleeve E, according to which way the horn is turned by the operator. This longitudinal movement is communicated through a cam-shaped recess in the spindle to a ring Q, causing it to rotate so as to bring a recess Q<2> in it beneath one or other of a pair of dogs R mounted on a clutch, ring S, which is oscillated by a link T jointed to the rod H. Mounted on the spindle P within this clutch ring are two ratchet-wheels U, U<1>adapted to be engaged by pawls R<2>, R<3>, secured to the ring S, according to the position of the recess Q<2> in the ring Q. These wheels transmit the oscillating movement of the ring to the pinion O and so to the horn. A portion of the periphery of each of the wheels U, U' is made without teeth to limit the amount of canting movement. A guard V<0> is pivoted on the shank B<1> of the horn. A footpedal or knee-lever may be provided so that the operator can cant the horn, instead of its being canted automatically. The relative movement between the rod H and sleeve D may also be effected by the horn as it engages the work, instead of by the cam-mechanism M, N. In a modification, means are provided for varying the position of the straight path in which the relative movement of the parts H, E takes place. The lever L, instead of being pivoted to a fixed part of the machine, is pivoted to an arm which receives a rocking movement from a vertical rod V<1>, Fig. 8. This rod is connected to a lever Y which is actuated by a cam X on a countershaft X<1> driven by gear wheels Z, Z<1>, Z' from the main shaft of the machine. The wheel Z<2> may be changed to vary the speed of rotation of the shaft X<1>.