Patent GB-190822630-A (GB)
Title: Improvements in or relating to Lasting or like Machines.
Inventor: BROCK MATTHIAS
Filed: 1908-10-24
Granted: 1910-01-24
Abstract: 22,630. Brock, M. Oct. 26, 1907, [date applied for under Section 91 of Patents &c. Act, 1907]. Lasting; nailing. -The end-lasting mechanisms of a bed-lasting machine for making shoes on crooked lasts are arranged for relative movement about an axis perpendicular to the sole and passing through or near the point of intersection of the median lines of the toe and heel of the last, when these lines intersect at a point in the neighbourhood of the ball or the forward part of the shank. In the machine shown, this relative movement is obtained by arranging the toelasting mechanism A, Fig. 1, with its middle line in the middle line of the machine, and pivotally mounting a plate 3 carrying the heellasting mechanism B on a pin 5, Figs. 1, 2, and 4, which is located beneath the last on, or approximately on, the axis above referred to; in some cases, the pin is adjustable in a slot in the machine frame. The plate 3 is furnished with rollers to run on a curved track, Fig. 2, the movement being limited by adjustable stops 7, which are equidistant from the middle line of the machine. A locking-device, carried by a block 11 and controlled by a hand-lever 13, is adapted to engage either of the stops 7. The toe-lasting mechanism consists of a pair of wiper plates 67, Fig. 2, attached to carriers 69, and operable through links 71, an equalizing-lever 73, and a rod 77, by means of a hand-lever 79. The adjustments of the toe-lasting head include means for tipping the lasting-devices laterally, and swinging them vertically about a pin 51, Fig. 1, and horizontally about a pin 43 ; while the whole head can be raised by depressing a treadle 31, and moved backwards and forwards horizontally by means of a screw 33. The support for the toe of the last consists of a rest 4, Fig. 4, carried by spring- pressed slides mounted in the upper enlarged end of a rod 24, which passes through a guide 28 projecting from and movable with the toe-lasting head, and is provided with an adjustable screw 26. This screw contacts with a slide 22 adapted to be moved vertically to force the toe-rest against the last by means of a cam 20 on a cam shaft 8. A ratchet or other device operated by a treadle is provided for rotating the shaft 8 intermittently. The heel-lasting mechanism is movable from a retracted to a predetermined operative position, where it is held by a hook 35, Fig. 1. This hook is automatically unlocked after the shoe has been lasted and simultaneously with the lowering of the toe-support. The heel-rest 6, which is movable with the heel-lasting mechanism, consists of a wedge-shaped pin 65 connected by a ball and socket to a spring-pressed post 6, Fig. 6, which is supported on an adjusting-screw 50 so as to have a certain amount of play in a sleeve 64. The post 6 passes through a slide 40, which is normally forced to the left, Fig. 4, by a spring 48, but is movable backwards to jack the shoe by means of a handwheel 42. A ratchet locks the hand-wheel after the heel-rest has been positioned, but it may be released manually, or automatically by the action of a cam on the shaft 8, during the withdrawal movement of the toe-rest. The screw 50 rests on a plate 52, which is pivoted to the slide 40. This plate is formed with a wedge surface resting on a spring-pressed adjusting-screw 66, which causes the heel-rest to move upwards during its backward movement ; ratchet teeth on the sleeve 64 engage spring-pressed pawls in the slide 40 and retain the rest in its elevated position. The rest may also be raised by means of a rod 60 connected to a treadle. The backward movement of the heel-rest draws the heel end of the shoe into engagement with the heel band of the heel-lasting mechanism, and cam-operated means are provided to close the band round the shoe during this jacking operation. These means comprise a cam 70, Fig. 4, which, through the connexions 72, 74, 75, 76, 80, 82, actuate a slide rod 84 pivotally connected to an equalizing-bar 85, Fig. 2. The ends of this bar are connected by links 86 to pivoted levers 88, the outer ends of which are connected to springs 90, while the inner ends are connected to the heel band. Simultaneously with the closing of the heel band, the heel wipers 100 are advanced and partly closed. These wipers are mounted on carriers connected by rods 102, an equalizing-lever 104, and a rod 105 to a hand-lever 106, while other links 112 having pin-and-slot connexions with the wiper-carriers are connected by a rod 110 to an upward projection of the slide block 82. The wipers are thus automatically positioned against or slightly over the edge of the last, but their lasting movement is effected manually by manipulating the hand-lever 106, which, during the automatic movement of the wipers, is moved from a retracted position to a position to be engaged conveniently by the operator. The toe-lasting mechanism is not fitted with a toe band, but, to assist in positioning the toe of the last, there are provided, as part of the jacking-mechanisms, two blocks 128, Fig. 7, adjustably secured to arms 125, 126, which are coupled together by links 91, 92, 93. To the arm 125 is pivoted a casing 124, in which is housed a spring plunger carried by a lever 122, which is actuated from a cam disk 120 on the shaft 8. During the jacking and wiping-over operations, mechanism is also actuated for loading a handtool with tacks ; this mechanism is described in the companion Specification No. 25,608, A.D. 1909.