Patent GB-190241-A (GB)
Title: Improvements in or relating to machines for grading, or for evening and grading soles, and other parts of boots and shoes, and for other allied uses
IPC: A43D1/08
Filed: 1921-09-16
Abstract: 190,241. British United Shoe Machinery Co., Ltd., and Roberts, W. T. B., (United Shoe Machinery Corporation). Sept. 16, 1921. Splitting-machines. - A machine for evening and grading boot and shoe parts including mechanism for performing a working-operation on the part which mechanism is set by other mechanism feeling the thickness of the part is so arranged that one part may be felt for thickness while a previously felt part is undergoing a working operation. The work-piece enters the machine, Figs. 1, 2, when a gate 1 is lifted and passes between feeling rollers 29, 82 of which the lower roller 29 is movable vertically and is connected to an arm 28 provided with teeth 30. The arm 28 together with the arm 26 is rocked counterclockwise, the arm 26 releasing a latch 4 and allowing, the gate 1 to fall on the work-piece. The former arm 28 turns a sector 32 loose on the shaft 33. The sector is provided with a face 35 adapted to engage a face 36 fast on the shaft 33 and thus to turn the latter which carries a wheel 38 provided with ratchet teeth facing in opposite directions. When the front of the work-piece passes under a shoe 52, the shoe is lifted together with a rod 49 which allows a pawl 46 to engage the wheel 38 and to prevent further clockwise rotation. Counterclockwise rotation of the wheel corresponding to thinner parts of the work-piece can still take place until the whole of the workpiece has passed between the rollers, when the gate 1 falls and through a link 44 and arm 43 moves a pawl 41 into engagement with the wheel 38 completely locking it. Loose on the shaft 33 is a sleeve carrying a sector 57 provided with an extension having ratchet teeth 60. With the falling of the gate 7, a pawl 61 is moved to engage the teeth 60 and through the arm 77 and rod 76 an arm 75 is moved to throw in a one-revolution clutch on the shaft 74. Pivoted on the shaft 33 is a member 68 to which is pivotally connected a rod 69 passing through a bearing 70 pivoted to a crank pin 71 on the shaft 74. Between the bearing and the head of the rod 69 the latter is surrounded by a spring 72. The member 68 in first rocked clockwise and then counterclockwise and has a face 83 which in the first movement engages a lug 84 on the segment 60 rocking it together with the gear-segment 57 until the face 84 encounters a lug 85 extending from the part 36 which at this time is locked. The segment 57 is locked in this position by the pawl 61 against return by a spring 86 connecting the bar 59 and the member 68 which spring is distended during the return of the member 68. The sector 57 gears with a bar 59 which is connected to stepped wedges positioning the upper roller 24 of the evening mechanism as in Specification 17808/09. Vertical movement of the roller 24 rocks an arm 21 and moves a rod 18 which is cammed out by a pin 51 on the arm 7 allowing the bell-crank 16 to fall and throw in a one-revolution clutch on the shaft 12. This shaft turns a shaft 11 at the same speed a cam 10 on which rocks the bell crank 9, 7 allowing the latch 4 first to engage under the pin 5 and then lift the arm 2 and gate 1 so that a second work-piece may be presented to the callipering rolls. This also disengages the pawls 41, 61 from the wheel 38 and sector 60. To ensure the withdrawl of the pawl 46 when the gate is raised it is connected by the slotted link 53 to the pawl 41. An additional pawl 65 fast on the shaft 42 is moved into engagement with the teeth 60 by means of a spring and is rocked out by the engagement of the lever 21 with a stud 67 on an arm 66 fixed to the shaft 42. A modified mechanism for operating the clutch on the shaft 74 is described. In a second form of the invention the rack bar corresponding to the bar 59 is connected to the wedges for setting the evening mechanism through two wedge setting mechanisms operated alternately. Specifications 17808/09, 18752/12, 147,921 and 181,838 are referred to.