Patent GB-190808880-A (GB)
Title: Improvements in or relating to Machines for Operating upon Soles or other Parts of Boots and Shoes.
Inventor: BOULT ALFRED JULIUS
Filed: 1908-04-23
Granted: 1909-07-23
Abstract: 8880. Boult, A. J., [United Shoe Machinery Co.]. April 23. Soles ; burnishing.-Relates to machines for operating upon the soles or other parts of boots and shoes, particularly to sole-levelling machines of the automatic roll type, and consists in the provision of means for varying the operation of the mechanism that changes the relative longitudinal position and lateral inclination of the roll and jack, in such manner as to compensate for variations in the relative lengths of the forepart and shank of shoes of different styles. The main features and method of operation of the machine are substantially the same as those described in Specification No. 10,883, A.D. 1895, in which a jack 1, Fig. 2, is mounted for movement about a shaft 2, and is actuated through the connexions 4, 6, 7, 9, 11 and a cam-roll 14 from a cam 13 on the cam shaft 36. To adapt the machine, however, to operate .upon boots differing in respect to the relative length of the forepart and shank, the cam-roll 14 is not mounted directly on the lever 11, as in the prior machine, but is carried by a bell-crank 15 pivotally mounted upon the lever 11. An arm 17 of this bell-crank is connected by a link 18 to a lever 19 pivoted at 20 to the machine frame. The forward end 21, Fig. 7, of the lever 19 is located between bosses 22 on links 23, 24, Figs. 2 and 6, which are pivotally connected to blocks 27, 28 mounted to slide in curved arms 25, 26 pivoted co-axially to different parts of the machine frame. These arms are provided with extensions carrying rolls 31, 32, which engage cams 33, 34 on the shaft 36. The end 21 of the lever 19 is recessed to receive a sliding coupling pin 38, Fig. 7, which is adapted to engage alternately recess s 39 in the bosses 22. The pin is moved by a headed pin 40 carried in an arm depending from a slide 43, which is mounted on rods 44 fixed on the machine frame. An extension of the slide 43 carries a roll 46, which engages a cam path in the cam 34, Figs. 6 and 7. During the first half of the revolution of the cam 13, the pin 38 is in engagement with the link 23, and the bell-crank 15 is controlled by the cam 33 ; while, during the second half of the revolution, the pin is moved so that the bell-crank is controlled by the cam 34. In one position of the blocks 27, 28, these cams do not act upon the bell-crank, so that the lever 11 is moved by the cam 13 as in the previous machine, but, when the style of shoe requires it, the bell-crank 15 can be moved to alter the effect of the cam 13 on the lever 11, by varying the position of the blocks 27, 28 in their curved arms. These blocks are actuated by travelling pieces mounted on screws, which are located at the front of the machine ; the screws are rotated by hand wrenches. The cams 33, 34 are of similar shape, but the blocks are differently adjusted in their slots according to the difference in curvature between the outside and inside edges of the sole. The point at which the link 9 is pivoted to the lever 11 is changed when the machine is required to operate upon very small sizes of shoes. The mechanism just described is also applicable to automatic edge-setters, or to other automatic machines for operating upon soles or other parts of boots and shoes.