Patent GB-231674-A (GB)
Title: Apparatus for automatically feeding in the materials for presses, stamps, perforating, printing, and similar machines for working sheet material
IPC: B21D28/08
Filed: 1924-04-12
Abstract: 231,674. St³bgen, R. April 12, 1924. Metal-sheet feeds.-Mechanism for giving quincunx and like staggered feeds in stamping, perforating &c. machines, is controlled by a number of notched discs 13 - - 16, Fig. 2, which are simultaneously rotated and operate, one at a time, clutches 4<a>, 5<a>, 6<a>, 7<a> which effect the desired whole or half feed in either direction by means of the intermittently rotated shaft 1, bevel gear 2 - - 7, and shaft 8, adapted to drive the sheet carrier. A shaft 20, Fig. 1, rotated once for every stroke of the machine, carries a, cam 27 which moves a lever 25 and pawl 24 to the right. This pawl is acted on by a weight or spring 28 but can only make a stroke to the left, and thereby rotate the ratchet 23 and the discs 13 - - 16 to which it is fixed, when a hole in an index wheel 17 on the shaft 8 comes in line with a projection 25<a> on the lever 25. These holes are so positioned that they allow the pawl to act when the sheet is in either end position or is a half feed therefrom and thus change the operating clutch in order to alter from whole feeds to half in the same or reverse direction or to whole feed in the reverse direction. Except in the last case the hole will allow the pawl 24 to act again, after one operation by the tool, to alter the operating clutch to that giving whole feeds in the reverse direction and this continues until the other end of the sheet is reached. To ensure accuracy of location a cam 19 forces a finger 21 into one of the notches 22 in the wheel 17 at every operation of the tool. The transverse feed at the end of each row is effected by a friction or other clutch which is thrown in automatically. To effect either a whole transverse feed t, Fig. 8 or #3/2 of this an index wheel with the required notches is used, the friction clutch allowing necessary slip. When the whole sheet has been operated on an adjustable stop 33 comes in contact with a lever 36 which moves a lever 82 so that its end is caught by a switch tongue and directed on to a cam, on the shaft 20, which lifts the lever still further and, by means of suitable connections 83, 84 raises all the clutch levers 9<a>, 10<a>, 11<a>, 12<a> and releases the ratchet 23 so that this and the discs are returned to their original position by a spring 32, Fig. 2, or other means. In a modification the levers &c. are raised by electromagnetic means. To facilitate the setting of the machine to give various arrangements of perforations &c. more than four control discs may be employed and some or all of these, or the levers 11<a>, 12<a> controlling the half feeds may be moved axially, as by a yoke 85, Fig. 4, to bring different discs into operation. Some of these discs may be unnotched or may have raised portions as 60 so that, by use of a coupling 93, the lever 12<a> may prevent the lever 11<a> from falling into some of the notches as W<1> of its disc 56. The index wheel 17 may be changed or angularly adjusted and the width of the slots may be altered. In another modification the slots are replaced by cam faces and in another the wheel remains fixed while the finger 25<a> is carried by an arm mounted on the rotatable shaft. Specification 152,517 is referred to.