Patent GB-191106446-A (GB)
Title: Improvements in Heel Nailing Machines.
Inventor: PETTENGILL GEORGE MCGREGOR
IPC: A43D79/00
Filed: 1911-03-14
Granted: 1911-08-24
Abstract: 6446. Pettengill, G. M. March 14. Heels, machines for.-In a heel-nailing machine of the reciprocating-cross-head type, a heel is supported on a heel-holder 31, Fig. 10, pivoted at its front end on a vertically-adjustable support 32 in the rear of the jack 33. An adjusting-screw 37 alters the inclination of the holder. The heel is pierced by a gang of awls in a carrier 28, which slides in guides at the rear of the cross-head, and is connected to the cross-head by a locking-bolt 51 when the naildriving and top-lift spanking turret is turned to spank on a top lift. The awls pass through holes in a nail-plate 39. The nail-plate slideholder 14 is L-shaped, the vertical part sliding in guides at the rear of the cross-head and being frictionally connected to the awl slide by a spring ball 56, and the horizontal part having guides in which the nail-plate slide 17 moves. A pair of upright rods 18 pass through openings in the holder 14, and at their upper ends are fixed to a nail-holder frame 180. As the crosshead descends, a rock-shaft 22 is operated, thus lowering sleeves 19, to which it is connected by arms 24 and links 25. The holder 14 which rests on these sleeves moves down until the face of the heel is engaged by a plate 40 pivoted at 41 to the nail-plate 39. A locking-bar 45, Fig. 10, is normally drawn forwards by a spring so that its head 45<1> projects below the plate 40, to maintain it in a position parallel to the inclined face of the heel. The vertical position of the head 45 is adjusted by a screw. As the heel is pierced, a hammer among the gang of awls drives a staple hanging over a lever in the nail-plate into the heel, thus attaching it to the plate 39. During the withdrawal of the awls, the holder 14 is held down against the heel by a spring latch pivoted to the machine table, and is freed as the cross-head nears its upper position. When the piercing operation is over, the turret is turned to bring the naildriving arm 8 into operative position, the movement freeing the awl slide from its bolt 51. The nail-plate 39 is then freed from a locking- pin and moved backwards below a loaded nailblock 60 by movement of a hand-operated shaft 62. After being loaded with nails, it is moved to a position under the drivers and over a shoe supported on a jack 33. The bar 45 is prevented from moving to this position by a stop. The heel seat is covered with glue before the heel reaches its position, by a roller 95, which is mounted on a rock-shaft 93' having a second arm 98 connected to the nail release slide. A second descent of the cross-head drives the nails and withdraws the staple securing the heel to the nail-plate; the plate 40 during this operation lies flat against the nail-plate. The turret is then turned to bring the top-lift plate into position, and at the same time the bolt 51 moves into its aperture in the awl slide in readiness for piercing a second heel which has been placed on the support 31. The top-lift is held between spring arms and a rear abutment in its holder. A safety-catch prevents the turret from being turned to bring the spanking-arm into operative position when the nail-plate is over the heel of the boot; or if the spanking-arm is in operative position, it prevents movement of the slide over the boot.