Patent GB-191322067-A (GB)
Title: Improvements in Metal Punching Machines.
Inventor: PAYNE THEODORE PESINGER
IPC: B21D28/24
Filed: 1913-09-30
Granted: 1914-10-30
Abstract: 22,067. Payne, T. P. Sept. 30. Punching.-A structural shape such as an I - beam is fed with respect to a punch slide by an independent power feed controlled by a hand-set selector mechanism corresponding to a measured distance of travel. The machine described has settings corresponding to tens of feet, feet, inches, and sixteenths of an inch, effected by rows of pushbuttons arranged with coned shoulders 67, Fig. 17, which operate in connexion with perforations in a spring- controlled locking-plate 68 such that, in setting any one button of a series, any previouslyset button is released. Zero or mere replacement buttons may be provided for each set. The buttons are linked up to a series of stops, Fig. 5, which engage fingers 80 on bell-cranks carried by arms mounted on a series of sleeves intergeared by epicyclic mechanism after the manner of a revolution - counter train. Each arm is provided with a restoring- spring. The gearing is connected at 22, Fig. 4, to the shaft 16, which drives the work-carriage 2, Fig. 8, through worm gear 12. In operation, the arm 42 swings about its sleeve due to rolling of the carried gear 43 about the fixed sector 46 until the finger 80 engages a stop corresponding to tens of feet. A detent on the arm is thus rocked into the path of a pin 88 on a wheel rotating in a direction opposite to that of the arm, resulting in the locking of both members. The arm 36 then commences to swing until similarly arrested, whereupon the arm 30 is likewise operated. Arrest of the arm 30 indicates the completion of the travel as far as integral inches and its stop-fingers (arranged in duplicate since the stops are set in two rows) act through linkage 108, 109 to traverse a sleeve 113, splined on a sleeve 116, to bring one or other of the diametrically opposite stops 130, 131 into the path of the stops 132 controlled by the ' sixteenths ' buttons 136 which are arranged as shown in Fig. 6. The movement of the finger on the arm 36 on the completion of integral feet, also actuated a contact to short-circuit a resistance in series with the field windings of the shunt-wound motor 128, Fig. 4, which drives the shaft 16 through the sleeve 124 and depressible key 120, thus slowing-up the motor. The sleeve 116, though driven by the shaft 16, has a limited relative angular motion as controlled by the spring 123, Fig. 14, and when arrested through the action of the stops 132, such relative rotation takes place, and the cam-surface 129 depresses the spring key 120, thus cutting out the drive. When a fresh setting of the buttons, for a further distance, is made, the detents are released and the arms 36, 30 are returned to their original position, the arm 42 making the corresponding fractional movement in a forward direction. The arm 42 moves forwards during the whole forward feed of the work-carrier. The clutch 228 is interconnected to the spacing - mechanism so that the punch is only in operation when the work is at rest and conversely. A brake on the shaft 16 locks the work during the punching. On completion of a spacing movement, when the key 120 moves inwardly, a stop 285 is removed from a clutch member 201 which moves to the left, Fig. 4, under the action of a spring 260, Fig. 9, swing plate 250, collar 249, rod 240, and shaft 246. A spring 229, Fig. 8, then throws the clutch 228 into action, spring 255, Fig. 9, raises a member 233, and a collar 254 raises swinging plate 2.50 and restores the member 234 to its elevated position, so that, on the completion of one revolution of the punch shaft, the clutch 228 is cammed out of operation, forcing the member 233 downwards. During this downward movement, a finger 283 pivoted to the end of a lever 281 engaging an arm 280 on the shaft 246 engages under the shaft 16, thus preventing the rocking of the shaft 246. The finger 283, normally held in position by a flat spring 284, is swung aside when the shaft 16 is rotated, leaving the stop 285 in action ready for a repetition of the cycle. On the raising of the member 233, the rod 252 and linkage 262 rocks a lever 265, Fig. 12, and brings the brake shoes 271 into engagement with the sleeve 116 on the shaft 16. A second set of buttons 150 controlling mechanism 156 similar to the previously - described spacing-mechanism is employed when it is desired to make a uniform spacing. Such mechanism acts through a sleeve connected by the clutch 201 to the sleeve 46. When the clutch is disengaged, the spring 199 rotates the sleeve and connected parts backwards to their original position ready for a repetition of the motion.