Patent GB-208771-A (GB)
Title: Improvements in or relating to fastener-inserting machines
IPC: A43D44/00
Filed: 1922-09-25
Abstract: 208,771. British United Shoe Machinery Co., Ltd., Barclay, W. R., and Keall, F. B. Sept. 25, 1922. Rands, attaching.-In a fastener-inserting machine of the kind used in attaching tapersection rands to heel lifts &c. and provided with work-slashing mechanism as described in Specification 7409/11 means are provided for using headed fasteners, and for making automatically in the rand a succession of slashes with a frequency different from that of the successive insertion of fastenings. As applied, to a machine having fastener-inserting mechanism of the type described in Specification 17129/93 the main shaft 4 is driven from the driving-shaft 3 at half the speed thereof. The pulley 5 may be coupled to the shaft 3 by a clutch of the type shown in Specification 720C/07, [Class 80, Mechanism &c.]. Fixed on the main shaft 4 is an eccentric 6 which, through a connecting-rod 7, controls the clutch tripping lever8 in such a manner that if the lever 8 is released directly after it has been actuated to close the clutch, the clutch will be opened only after the shaft 3 has made two revolutions. The slashing knife 9 is fixed on an arm 10 mounted on a vertically-adjustable, rotatable shaft 11. The arm 10 is connected by a link 20 to a two-part arm 21 pivotally mounted on a shaft 22. The lower part of the arm 21 is urged by a spring 24 into engagement with a groove in a block 26 fixed to one arm 27 of a cam lever, the other arm 28 of which carries a roll 29 in engagement with a cam groove 30 on the shaft 3, but is normally held away from the block 26 by a plate 25 on the lever 8. When the lever 8 is depressed the knife is oscillated at each revolution of the shaft 3. The rand is guided to the tacking mechanism by an inclined face 32 on a block 31 co-operating with an inclined face 36 on a knife guard 35. The knife-slash extends forwardly and upwardly in the rand in the direction of feed. The guard 35 is normally urged towards the guide 31 by a spring, and withdrawn positively, upon release of the treadle, through a rod 138 and bell-crank lever. A rotary worktable 37 is keyed to a sleeve 39 on which is fixed a spiral gear 42 driven by a second gear 43. A shoulder on the shaft 38 of the work-table rests on a collar 44 pivoted to a lever 45 which carries a roll 46 held in engagement with a cam 47 by a spring 48. An adjusting screw 49 or other quick adjustment supporting the rear end of the lever 45 permits vertical adjustment of the work-table. The cam 47 is fixed on a shaft 50 connected by an arm 51 and rod 52 to a treadle. A stud 54 on the arm 51 enters a slot in an adjustable link 55 connected to the lever 8. The lever 45 has at its rear end ratchet teeth 56 which may be engaged by a pawl 57 mounted on a spring- pressed arm 58 and connected by a link 61 to the arm 8. When the treadle is depressed the table is raised against the tack throat 53 by the cam 47 and lever 45, the link 55 then operates the arm 8 to close the clutch and the arm 8 operates the pawl 57 to augment the pressure on the lever 45 and work-table 37. The tacking mechanism is now operative and further depression of the treadle and arm 8 releases the lower part of the arm 21 so that it engages the block 26 and slashing is also performed. A feed wheel 64 is mounted on a shaft 65 having at its rear end ratchet teeth engaged by a pawl which is oscillated from the shaft 3 by a cam lever 70 and suitable links. A bevel gear 73 on the shaft 65 meshes with a bevel gear 74 on the shaft 76 to rotate the work table through the spiral gears 42, 43.