Patent GB-191117152-A (GB)
Title: Improvements in or relating to Solo-rounding, Sole-channelling or like Machines.
Inventor: BOULT ALFRED JULIUS
IPC: A43D43/02
Filed: 1911-07-26
Granted: 1912-07-25
Abstract: 17,152. Boult, A. J., [United Shoe Machinery Co.]. July 26. Channelling ; traversing-cutter type for cutting designs ; vertical-cutter type for cutting sheet material in direction of feed.-A solerounding sole-channelling, or like machine, of the type in which a pattern of the shape of the sole to be rounded, and a knife which is moved relatively round the pattern are employed, is arranged so that the machine comes to rest with the knife out of contact with the pattern. The sole is clamped upon the pattern R on the table 2 of the machine, and the knifeholder arm 3 is adapted to hold the cutting- tools yieldingly towards the pattern, as described in Specification 2407/09. A knife yoke 4 is secured by trunnions to the arm 3, and carries a channelling-knife actuating-block 6, which is pressed against a channelling-pattern C. The rounding-knife block 8, which carries the knife 11, is slidably mounted on the block 6, and is pressed against the pattern R by a spring weaker than the spring holding the yoke 4 up to the work. The yoke carries an adjustable block 14, upon which is pivotally mounted a knife block 16 carrying the channelling and grooving tools. The front end of the block 16 has an adjustable presser-foot 18, Fig. 6, which determines the depth of the channel. A grooving- tool 19 is adjustably secured to the block 16 by a screw 20 passing through a slot in a strap 21. The lower end of the strap is rounded and engages a groove in the shank of the grooving- tool, and the upper end is slotted to receive a collar on an adjusting-screw 22 screwed into the block 16. The block also carries the channel knife 23, which is mounted so that it may be withdrawn for grinding and replaced exactly in its original position. The block 14 may be swung about its pivot, to lift the knives from the work, by means of a handle 30, which moves a cam-surface in contact with the block 14. The knives are automatically lifted at the completion of the cutting operation by means comprising two levers 36, 37 mounted on the presser-foot 18. When the upper lever is actuated against the pressure of a spring, a tooth 38 engages a slot in the lower lever, which is turned to bear upon the work, thus lifting the knives from the sole. The upper lever is operated by a yielding abutment formed by an arm 41 projecting from a standard 42 on the machine. The arm 41 is so mounted that it yields to permit the lever 36 to pass below it in either direction after the knives have been lifted from the work. The rounding-knife is moved away from the pattern and turned so that its cutting-edge points diagonally towards the pattern by a latch 63, which engages a pin 62 on the yoke carrying the tools when the movement of the yoke is reversed at the end of the cutting operation, and turns it on the pivot. The form of the knife block is such that its forward end acts as a lever to press the knife from the work when the yoke is turned. In operating upon a sole, the channelling-knives are held away from the work by lifting the lever 30, the rounding - knife operating alone until the point is reached where the channel starts. The lever 30 is then depressed by a bell-crank lever 51, which strikes an adjustable finger mounted on the machine - head. The channelling and rounding-operations are then carried out together until the channelling- knives are lifted by the action of the arm 41.