Patent GB-190913711-A (GB)
Title: Improvements in or relating to Presses.
Inventor: BUCKMINSTER IRA CLYDE
IPC: B30B1/18
Filed: 1909-06-11
Granted: 1910-08-11
Abstract: 13,711. Buckminster, I. C. June 13, 1908, [Convention date]. Presses, mechanical.-In a press of the type in which a pressure-applying member is movable above a bed into any number of positions within given limits selectable without constraint, means are provided for bringing the pressure-applying member to rest in the desired operative position and for automatically moving it away from such position after the pressure - applying movement. The invention is described as embodied in a machine for cutting out blanks for boots and shoes such as is described in Specification 22,023/05, [Class 17, Boots &c.]. Movement of a hand-lever 84, Fig. 1, into position over the work serves to start the machine, the subsequent sequence of operations of its parts for a complete single operation being then effected automatically. The sequence of operations comprises (1) the rotation of the platen 8 into position over the work, where it is brought to rest by suitable brake mechanism, (2) the vertical reciprocation of the platen, and (3) the automatic movement of the platen for a short distance away from the operative position, where it is brought to rest by the brake mechanism, the brake being then released so as to leave the platen free for any movement by hand over the bed. Lateral oscillation of the platen is obtained by a segment gear 30 driven from a pinion 32, which is clutched to a gear 38 on a continuously driven shaft 28. An expanding-ring friction clutch serves to connect these gears and is operated by the depression of a pin 54 through links 56, 58, 60, when a rod 76 is depressed by a cam 72, carried and operated by the starting-lever 84. The machine is normally locked against operation by a spring-controlled rod 86, which is mounted on the lever 84 and projects under a segment plate 92 mounted on a supporting-stem 94, which thereby keeps the lever 95, rod 66, the front end of the lever 60, and rod 76 in a raised position. The lever 84 is swung into the operative position by a handle 98, which is so mounted thereon as to withdraw during this movement the rod 86 and allow the operation of the machine and the depression of the plate 92. When the lever 84 is released, the rod 86 is returned by a spring 88 to be engaged by teeth of the segment plate 92, and the lever 84 is thereby locked in its adjusted position. When, during the rotation of the platen 8, the rod 76 leaves the cam 72, the lever 60 is allowed to resume its original position under the action of a spring 64, thereby unclutching the driving-gear 32 and allowing the segment plate 92 to rise under the action of springs 93. The platen 8 is brought to rest in its operative position by a braking-mechanism which comprises arms 110, 112, Fig. 3, which are adapted to grip a disk 116 carried by the hub of the driving- gear 32 and are actuated so as successively to grip and release said disk by an eccentric 122, which is automatically clutched to a rotating gear 40 for one rotation thereof. The clutching-device comprises a spring-controlled pin on the eccentric and a corresponding recess on the gear 40. The pin is withheld normally by a lever 130, and is released, when the brake is required to be operated, by linkwork connexion with a rock-shaft 136, Fig. 1, operated from the link 58 through a collar 140 and a spring-controlled pawl 138. The eccentric 122 is suitably linked to a rock-shaft 146 provided with an arm 148, which trips the pawl 138 from the collar 140, thereby allowing the return of the lever 130 for unclutching the pin at the end of one rotation of the eccentric 122. The platen 8 is vertically reciprocated from a shaft 14 clutched for one rotation to a continuously driven pulley 16. The clutch is controlled by a lever 152, Fig. 2, operated through catch plates 156, 158 and links 164, 162, 166 from the lever 60, Fig. 1. The platen 8 is returned to its inoperative position after the pressureapplying movement by a pinion 34, which engages the segment 30 and is coupled to a continuously driven gear 40 through an expanding-ring onerotation friction clutch operated by a lever 204', Fig. 2, from a rod 202<1> which is raised during the ascent of the platen 8. During the descent of the platen, a lever 182, operated through links 180, 178, 176, 168 from the adjusting-rod 172, is locked to a slide 190, on which is mounted a fourarmed lever, the arm 198<1> of which has been rocked into position beneath a lug 200<1> on the clutchactuating rod 202<1> when the lever 60 was rocked to start the machine. The ascent of the platen therefore through the lever 182 raises the slide 190, the four-armed lever, and the rod 202<1>, which thereby effects the coupling for one rotation of the mechanism necessary to return the platen laterally for a limited distance. The braking-mechanism is then again operated from a collar 220' and connected parts similar to those already described. The parts of the machine are duplicated where necessary to allow the lateral adjustment of the platen in the reverse direction.