Patent GB-381973-A (GB)
Title: Improvements in or relating to duplex eyeletting machines
IPC: A43D100/02
Filed: 1931-07-20
Abstract: 381,973. Setting eyelets &c. UNITED SHOE MACHINERY CORPORATION, 140, Federal Street, Boston, U.S.A.- (Assignees of Gookin, S. L. ; Quincy, Massachusetts, U.S.A.) July 20, 1931, No. 20655. Convention date, July 21, 1930. [Class 43.] A duplex eyeleting machine comprises pairs of opposed punching and opposed setting devices, movable means whereby the devices are shifted laterally to place them alternately in position for operation by opposed hammers 96, and a rotary actuating shaft 27. A doubleacting toggle forms part of the connection between the shaft and the hammers. The devices are provided with individually adjustable heads 34, 47 for regulating their strokes, and the rotary cam shaft 27 extends substantially parallel to the direction of operating movement of the devices. Specification 20754/02, [Class 43, Fastenings, Dress], is referred to. The machine comprises a frame 20 wherein is mounted a pulley 25 forming part of a disconnectible clutch and driven from a belt 24. On retraction of a controlling member 30, the cam shaft 27 is driven from the pulley 25. The operating mechanisms are driven from the shaft 27 by a series of cams, cam-rolls, and bellcrank levers. A pair of opposed punching devices and a pair of opposed setting devices are mounted on a movable head 33, Fig. 9. The punching device comprises a tool 32 slidably mounted in the head 33 and provided with an adjustable head or bolt 34. These devices are normally held retracted by levers 36 and a spring 37. Chips of waste material are discharged through ducts 41 and openings 42. The setting device comprises a plunger 43 having an annular groove and a spindle 45 spring-mounted in the plunger, and is adjustable by a head or bolt 47. Levers 49 and a spring 50 normally hold the setting devices retracted. The head 33 is pivoted by a pin 57 to a carriage 56 slidable on guide-rods 58 and operated through cams on the shaft 27, bellcrank lever 61 and a link 62, Fig. 4, so as to move the devices alternately into position beneath the hammer 96. The hammers 96 are connected by toggle links 101, Fig. 6, to a slide 102 on the guide-rods 58 and operated from the shaft 27 by cams 105, 106, cam-rolls 107, 108 and a bell-crank lever 109. A punch bed 40 and clenching anvil 54 are mounted in a tongue 55, Fig. 9. A work support 64 and presser feet 65 are provided to hold the work in position. Edge-gauges 68 are provided and the work support may be set by pinion and ratchet connection with movement by fine increments, through gearing controlled by a knob 76, Fig. 4. The arrangement of the double-acting toggle is such that the punching devices are first operated by a short stroke of the hammer which is then fully withdrawn so as to clear the setting devices which are then shifted into register. Full retraction of the punching devices also enables a movable section of a raceway to be brought up. The setting device is then operated and the hammer sligbtly retracted, so as to relieve pressure on the eyelets, but remain in contact in order that, on a pivotal movement of the head, the work may be fed on. The hammers are then fully retracted to clear the punching devices which are then once more shifted into position. Feeding work automaticaly.-After the eyeleting operation, the setting devices remain in contact with the eyelets and the work is fed by a pivotal movement of the head 33 about the pin 57 by means of an arm 77 engaged by a swivelled block 78 on the head 33, Fig. 9. The arm 77 is connected to a bell-crank lever 84 operated by cams on the shaft 27. Regulatable mechanism of the type described in Specification 18530/99, [Class 43, Fastenings, Dress], is used for transmitting the movements of the lever 84 to the arm 77. Links 85, 86 connect the lever 84 and the arm 77 and are connected at a pivot 87. The position of the pivot 87 may be varied so as to vary the length of the oscillation of the arm 77 by means comprising levers and pivots controlled by a regulator set by stop pins in a stationary sector. The degree of movement of the work and the spacing of the eyelets may thus be varied. Hoppers and delivery raceways.-The raceway, Fig. 18, comprises two divisions 116, 117 spaced by blocks 118, which receive dowel studs 120 on the frame 20. The raceway is detachably secured in position by interconnected spring latches 121 pivoted to the frame and engaging the spacing blocks 118. The movable section of the raceway is pivoted to the upper section by coaxial pins, the lower pin being fixed to a block 130 and thus communicating motion to the movable section by means of a tongue 134 on the pin engaging a groove in a head 135 of a rock-shaft 136 mounted in a boss 137 on the frame 20. In mounting the raceway the tongue 134 automatically slips into this groove. The rock-shaft 136 is oscillated by an arm 138 driven by a link from a bell-crank lever reciprocated from the cam shaft 27. The upper sections of the divisions 116, 117 diverge and are oppositely inclined so that eyelets are fed equally in parallel reverse positions from a hopper 115. The hopper 115 is funnel-shape and comprises flat oppositely inclined and convergent bottom walls whereto are screwed lower ends of annular walls 149. The eyelets are swept by two brushes, one on each bottom wall, into notches 156 communicating with the divisions of the raceway. The brushes are rotated alternately by links 162 driving pawl and ratchet gearing 153. The links 162 are operated from the lower hammer 96 by links 158, 159 and a bell-crank lever 160. The upper end of each link is provided with a stud having an annular groove so as to facilitate connection with a detent carried by a leaf spring attached to a pawl carrier in the ratchet gearing 153. The leaf spring is formed with a finger-piece for retracting the detent to release the stud.