Patent GB-190404027-A (GB)
Title: Improvements in Stave Shaping Machines.
Inventor: SHAW ALBERT LAWRENCE
Filed: 1904-02-17
Granted: 1904-03-24
Abstract: 4027. Shaw, A. L. Feb. 17. Planing.-Staves for tanks, stills, &c. are shaped by apparatus such as that shown in Figs. 2, 3, and 4. The blanks A are fed along the table 6 by an endless chain 10 having dogs which pass through a slot 9 in the table and engage with the rear ends of the blanks. The cutter 48, which operates on one edge of the blank, is mounted on an arm 45, pivoted to a plate 35, which is pivoted on a bolt 40. Pivoted also on the bolt 40 is a plate 34 on which the plate 35 is adapted to swing, both being secured together in position by a bolt 39, Fig. 4. The plate 34 has an arc-shaped slot 43 at the top, in which a piece 41 fixed to the standard 33 engages. The cutter 56, which operates on the other edge of the blank, is mounted on a carrying-head, the upper end of which is pivoted at 51 to a standard 50, the lower end being guided by a bolt 52 in an arc-shaped slot 53. The carriers of both cutters are connected with a rock-shaft 57 so as simultaneously to alter the inclination of the cutters according to the amount of bevel required. The bevel, depending on the width of the stave, is automatically controlled by a pivoted arm 65, Fig. 2, having at the free end a roller 67 which abuts against the blanks, the arm being thus tilted. The arm is connected by a link 122, lever 120, link 123, and crank 124 with the rock-shaft 57, which is thus rocked by the movement of the arm. The arm 65 has also an arm 68 which engages between collars 69 on a sliding shaft 70 to which the arm 45, carrying the cutter 48, is loosely attached by means of a slotted foot-piece 73 enclosing a nut 72 on the shaft 70, which is in part threaded, the nut having a pin 76 engaging in the slot 75 of the foot-piece. Thus, the cutter 48 is moved laterally according to the width of the blank, and both cutters are inclined proportionately. To taper the staves, the shaft 70 is rotated to cause the nut 72 to move the cutter 48 towards the stave. The shaft 70 has a pinion 77 which gears with a pinion 84 through an intermediate pinion 79, the pinion 84 being mounted on a shaft 82 which also carries a sprocket-wheel 83. The shaft 82 is suspended from a rod 93, and the gearing is suitably mounted so that, when the rod is lifted, the sprocket-wheel engages with the chain 10 and is rotated thereby, and thus the shaft 70 is rotated by means of the gearing as described. The rod 93 is connected by an arm 92 with a shaft 86 having at the other end an arm 89, which, as the blank moves under it, is lifted, thus also lifting the rod 93 and so rotating the shaft 70. The shaft 70 is restrained from sliding movement, while being rotated, by means of a sliding locking-lever 95, moving in guides 96 and provided with an arm 77 engaging with collars on the shaft. In one of the guides 96 is a cam-lever 99 conneted with the shaft 82, which, on being lifted, operates the cam to lock the bar 95. When the stave is finished, the shaft 70 is rotated in the reverse direction to return the nut by means of a weight 102 attached to a cord 103<a> wound on a drum on the shaft. The staves may be backed by means of a suitably-mounted cutter 103 at the end of the machine.