Patent GB-191416689-A (GB)
Title: Improvements in and relating to Bed-lasting Machines.
Inventor: MERRICK FRANK WOODWARD
IPC: A43D21/10
Filed: 1914-08-13
Granted: 1915-11-15
Abstract: 16,689. Merrick, F. W. Aug. 13. Lasting.-Relates to a bed lasting-machine in which the lasting-devices are actuated by the relative approach of the last carrying the upper and these devices, and consists, essentially, in the arrangement and control of a power-operated mechanism for effecting the relative movement referred to. The invention is described as applied to a machine which contains the features of companion Specifications 14,105/15, 14,106/15, 14,107/15, 14,108/15, and 14,109/15. The last is supported on a heel pin 1, Figs. 2 and 5, normally resting in a raised position on a spring 8 located in a post 2 of a carriage 3, which can be adjusted on a vertically movable bed 5 by means of a hand-wheel 7. A cushioned toe-rest 11, Fig. 7, is mounted in a sleeve 13 socketed in a post 14 of a carriage 15, Fig. 2, which can also be adjusted horizontally on the bed 5; springs 18, 20, Fig. 7, support the toerest yieldingly. The heel-lasting devices comprise a heel band 24, Figs. 2 and 9, pivotally mounted by swinging-arms 25 on a sliding plate 26, and a pair of normally expanded spring- pressed wipers 27 pivoted together at 28 and pivotally mounted by links 29 on a plate 31 slidable upon the plate 26. The plate 26 is mounted for transverse tipping movement on a pin 34 passing through lugs 35<a>, 35b on a carrier 35 and surrounded by a spring 37, which is arranged so that, as the carrier 35 is moved towards the shoe, the plates 26, 31 move with it until the heel band grips round the heel, whereupon the plate 31 moves forward relatively to the plate 26 and causes overlapping portions on the rear ends of the links 29 to engage a roll 38, which opens the links and closes the wipers over towards each other. The carrier 35 is mounted for an in-and-out, as well as an up-and-down movement, being supported by pairs of parallel links 40, 41, Fig. 2, on a U-shaped mounting 42 extending on opposite sides of a sleeve 43 on the post 2; this mounting can be adjusted by a screw 45 to set the lasting-head at the required inclination to the horizontal to suit the spring of the heel end of the last. To enable the lasting-head to swing outwards and then inwards again to effect a preliminary lasting during the relative approaching movement of the last and the lasting-devices, as well as to enable the carrier 35 to be afterwards actuated to complete the lasting of the heel, the links 41 are connected by a yoke-shaped member 46 with the upper arm of a hand-lever 47, which is pivoted between extensions 42<a> of the mounting 42. The arrangement described forms a powerful toggle mechanism for advancing the heel-lasting devices with increasing power and finally locking them at the end of their inward movement. This movement can be varied by adjusting the effective length of the upper arm 47<f> of the hand-lever 47, which comprises a handle portion 47<a> having a spindle 47b, Fig. 2<a>, threaded into the arm 47<f> and surrounded by a hub 47<d>, mounted on cone centres 47<e> carried by the extensions 42<a>; a spring-pressed ball adapted to engage a notched collar on the spindle 47<b> serves to hold the handle portion 47<a> against rotation until sufficient force is exerted by the operator. The vertical position of the lasting-head can be adjusted by means of a collar 48, Fig. 2, on the post 2, while the head may be swung round the post by means of the sleeve 43. The toe-lasting devices comprise a wiper composed of a series of segmentshaped links 49, 50, Fig. 4, pivoted together to overlap and form a chain, the intermediate link being pivotally supported on a plate 54; arms 52 pivoted to the end links are also pivotally supported at 53 on this plate, and are controlled by springs so as normally to open the chain to an extent limited by stop-pins 52<b>. The plate 54 is mounted on a carrier 56, Fig. 2, by means of a spring-surrounded pin 57, the carrier being supported by pairs of parallel links 59, 60, and a mounting 61 pivoted to a sleeve 63 surrounding the toe post 14. The means for actuating the toe-lasting devices from a hand-lever 66 are similar to those described in connexion with the heel-lasting head. To draw the upper snugly against the under portion of the last, a U-shaped wiper band 68, Figs. 2 and 7, of leather is provided, being supported by a series of ball-ended turn-buckles 70 connected respectively to brackets 69 carrying the band and to stands 71 screwed to plates 73 on the mounting 61. The posts 70 which are in line transversely with the stem of the toe-rest are adjustably connected by links 73, 74 to the upper end of the sleeve 13, which is normally held elevated by the spring 20. When the sleeve is forced down, the posts 70 are swung inwards to move the wiper-band 68 against the sides of the last. The remaining posts are swung inwards by springs 75, Fig. 2, which engage adjustable arms 76 upon the posts, and are adapted to contact with stop-pins 77*. The vertical inclination of the posts 70 may be varied by adjusting the stands 71 on the plates 73. The devices for lasting the waist comprise wipers 77, Fig. 12, adjustably carried by stands 96 mounted to swivel in spring-pressed supports 84 pivoted to carriers 78, which are themselves pivoted to a mounting 80 supported by a pin 81 extending from a collar 82, Fig. 2, adjustably secured to the heel post 2. The parts normally occupy the position shown in Fig. 12, but when the last is lowered, a pin 88 carried by a collar 89, Fig. 2, adjustably secured to the heel pin 1, engages the crossedover ends of the carriers 78 and swings the carriers yieldingly about their pivots to move the wipers downwards with the last, but at a slower speed, to wipe the upper at the waist of the shoe. The mounting 80 is normally held horizontal by a spring-pressed pin 99 engaging a notch in the pin 81, but it may be inclined to adjust the relative heights of the wipers 77 as desired. The heel pin and toe-rest are normally elevated to receive a last, and the various lasting-devices are set so that, when the last is depressed into them, they engage the upper and exercise a preliminary lasting of the shoe; final lasting with the shoe held depressed is then obtained by manipulating the toe and heel lasting devices as described. For depressing the last, there is employed a hold-down 102 connected by a yoke 103, Figs. 1 and 2, to a plunger rod 104, the upper end of which is reduced in diameter to enter an extension 107 of a fixed guide 106. A block 108 rests on the shoulder formed by reducing the diameter of the rod 104 and is connected to the upper end of the extension 107 by toggles 110, 112, which are actuated through links 114 from a travelling nut 116 on a screw 117. This screw is adapted to be rotated by a reversible drive mechanism 118, 119, 120 controlled by a shifter 121 connected through links 125, 126 to a treadle. The shifter 121, which is normally held in mid-position by a spring 123, provides means for controlling the movements of the hold-down to a nicety, or for arresting it at any part of its movement. At the end of its predetermined amount of downward movement, a connexion 129 between the nut 116 and the shifter automatically throws the clutch out of gear. The yoke 103 of the hold-down is furnished with a lateral extension 133 adapted, as the hold-down is raised, to engage a stop 134 so as to swing the hold-down into an inclined position. To adjust the heel and toe lasting heads bodily, the bed 5 is sleeved upon a cylindrical portion 135, Fig. 1, of the machine frame and is movable by means of a screw 136.