Patent GB-189712880-A (GB)
Title: Improvements in Machines for Inserting Metallic Fastenings into Work, chiefly Designed for Use in the Manufacture of Boots and Shoes.
Inventor: GODDU LOUIS HENRY
Filed: 1897-05-25
Granted: 1897-07-10
Abstract: 12,880. Goddu, L. H. May 25. Nailing; screw nails, making. Relates to a machine for inserting screws formed from a continuous screw - threaded wire into boot soles or other work, and for cutting off such screws. A reel of screwed wire is mounted at the top of a hollow spindle a<8> rapidly rotated by belt or other gearing, the wire being drawn downwards through the spindle for insertion in the work by means of specially-designed feed-rolls actuated by ratchet mechanism a<32>, which is operated by a pinion and rack a<44> which slides vertically on the spindle by the action of a pair of levers b, b<1>. The reel of wire is enclosed in a guard consisting of a bonnet - shaped hood h<13> pivoted to the framing. The wire, after being screwed into the work, is cut off by a pair of spring-opened shear blades carried by two levers mounted below the spindle in such a way that they both move in the same horizontal plane. These levers have wedge-shaped ends, and are operated by a pair of rollers b<95> forced between them. These rollers are carried by a lever b<50> actuated by a cam b<55>, and returned to its normal position by a spring b<7O>. The horn or work-support, not shown, is mounted so that it can be rotated for adjustment and can also be adjusted vertically ; it is carried by a vertical shaft, the lower end of which is connected to a controlling or measuring device by which the length of wire inserted into the work is automatically governed by the thickness of the work. This device consists of a lever jointed to the lower end of the horn shaft, and connected by a vertical link to another lever provided with a bevelled lug, which forms an abutment to limit the motion of the wire-feed levers b, b. Thus, the thickness of the work on the horn, which is pressed upwards by a spring, will determine the amount of elevation of the horn shaft, and consequently the position of the lug or abutment which governs the distance through which the levers b, b<1> can lower the rack a<44> operating the feed-rolls. The levers b, b<1> are operated to feed the wire by means of a cam b<17> and are returned by a spring, and the cam shaft is operated by worm gear b<22> from the wire-feed spindle. The mechanism for feeding the work consists of a bar f below the shear levers serrated to push the work forward, and caused to slide horizontally by a rack and pinion f<2> at its rear end operated by a lever f which is moved by a cam c<9> on the cam-shaft. Preparatory to the feeding of the work, the horn is automatically lowered by means qf ratchet mechanism operated by a cam on the cam shaft, and arranged in connection with the levers described above as governing the wire feed by the motion of the horn. To stop the feed of the wire when desired, a hand-lever is provided at one side of the machine fitted with a brake for holding it in any position to which it may be moved. This lever actuates a latch arrangement adapted to engage with a lug on the wire-feed lever b and hold the latter out of engagement with its operating-cam. The machine is preferably driven by belt gearing, and Fig. 2<a> shows a section of the belt-shifting fork which is preferably used. The forks are carried on an arm h<40> which, by a handle, can be turned on the pivot h<42>, and is held in either of its two positions by a spring plunger engaging notches h<45> in the pivot pin.