Patent GB-348071-A (GB)
Title: Improvements in or relating to apparatus for the supply of nails or like fasteners
IPC: A43D71/00
Filed: 1930-02-06
Abstract: 348,071. Boot-making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. and MINETT, W. T., Union Works, Belgrave Road, Leicester. Feb. 6, 1930, Nos. 3973 and 5637. [Class 17 (i).] Heels, machines for.-Relates to machines for attaching heels arranged to drive attaching fasteners from inside the shoes into the heels and having power-operated means for delivering gangs of fasteners to position to be so driven, and consists in the provision of means preventing delivery of a second set of fasteners to the jack before the preceding set has been driven. As applied to the machine described in Specification 339,935, [Class 17 (i , Boots and shoes, Apparatus for making &c.], a locking device is provided ensuring that the heel measuring device and the nail drivers must be operated before a second set of nails are supplied. A nail distributing and delivering device of the kind described in Specification 23356/04, [Class 17, Boots &c.], picks off nails one by one from a raceway 14, Fig. 1, and finally deposits a predetermined number of nails as a gang into a nail transferrer 20 automatically moved by power as required between the underside of a block 15 at the lower end of a gang of nail ducts 16 and the upper end of the jack 18. The transferrer 20 is carried by a bar 22 sliding in a guideway and formed with a rack gearing with a pinion 35, Fig. 2, against which is pressed a friction disc 39 rotating with a shaft 28 on which is splined a double clutch 33 having upper and lower saw teeth engaging respectively the hubs of upper and lower bevel wheels geared together and rotated by a worm 26 from the shaft of the nail distributing mechanism. The position of the clutch 33 is determined by a rod 41, the lower end of which has a collar with a step 59 co-operating with a finger 47 pivoted to a control lever 46 operated by a pin 64 on a rod 65 actuated by the heel measuring treadle. A cam 40, Fig. 6, on the shaft 28 is driven in one direction only by a freewheel mounting. The rock shaft 45, forming the pivot for the level 46 carries an arm 60, Fig. 5, positioned under an arm 62 to which is pivoted a link 63 operating the clutch trip of the driving means of the nail distributing mechanism. The other end of the arm 60 is stepped to co-operate with a bell-crank lever 73. Normally, descent of the rod 65, at the conclusion of heel measuring, actuates the rod 63 to start the nail distributing mechanism. At this time, the gear wheel 29 is clutched to the shaft 28. As the shaft commences to move, the cam 40 pushes the finger 47 outward from under the step 59, the rod 41, however, remaining elevated by the top of the cam disc. The pinion 35 is rotated until a stop 53 on the bar 22 contacts with an adjustable stop 55 and the nails are dropped into the driver holes in the horn. At the conclusion of one rotation of the shaft 28, the rod 41 drops into a recess 50 in the cam 40 and the transferrer 20 is returned. Should a second actuation of the treadle be necessary, for properly seating the heel on the shoe, the arm 60 is prevented rising by the sleeve 73. The driving mechanism is clutched by pressure on a handle 17. During the power driving, a rod 70, Fig. 5, rises, removing the lever 73 from the upper to the lower step thus, freeing the arm 60 and allowing the finger 47 to again engage the step 59, returning these parts to starting position. In a modification, the control lever 46 may be operated by hand instead of by the rod 65. Both heel measuring and fastener driving mechanisms may then be operated, if desired, without a nail gang being automatically supplied. Specifications 23031/11 and 316,187, [both in Class 17 (i), Boots and shoes, Apparatus for making &c.], also are referred to. According to the earlier Provisional Specification, the heel crank lever 73 may have a third arm and cooperate with a pair of spring-pressed blocks sliding in perpendicular guideways to lock the nail delivery mechanism against a second actuation, the third arm having a pin co-operating with a latching finger to set the assembly in nail-delivering position.