Patent GB-190405162-A (GB)
Title: Improvements in Machines for Making Certain Kinds of Wire Links for Forming Wire Mesh Work for Mattresses and the like.
Inventor: LONGFIELD CHARLES
Filed: 1904-03-02
Granted: 1905-01-12
Abstract: 5162. Longfield, C., and Parker, C., [trading as Longfield & Parker]. March 2. Making parts of upholstery; bending ; shearing.-Relates to machines for making V-shaped wire links, of the kind described in Specification No. 10,191, A.D. 1902, [Abridgment Class Furniture &c.], for forming mattresses and the like. The wire8,after passing through a straightening-mechanism, is fed forward by a gripper which is reciprocated by a connecting- rod attached to an adjustable crank disc. This disc is carried by a shaft which is driven by mitre-wheels from the main shaft 2. A gripper 15 holds the wire during the return of the feeding-gripper. The wire passes between a block 37 and a peg 16 carried by a slide 17, shown in plan in Fig. 4. The peg is given a vertical reciprocating motion through a hole in the slide 17 by a lever pivoted to the machine frame below the slide and actuated by a cam on the shaft 2. The slide 17 is reciprocated h o r izontally by a cam 98 on the shaft 2, against which it is held by a spring. The peg 16 bends the link into the form of a V, as shown in Fig. 1, by carrying it between two bending-tools 27, 28, which may be grooved at the ends to hold the wire in position. The bending-tools are carried by levers 29, 30 pivoted to the machine frame and connected at their ends by a spring 36. When the slide 17 moves forward, a block 33 attached to it engages two arms 34, 35 fixed to the levers 29, 30. The outer ends of these levers are thus forced apart and the bending-tools are brought together so as to bend the wire. The length of wire to form the link is cut off by a tool 40 carried by a pivoted lever 41, which is actuated by a cam 44. The cutting-tool works against the face of a block 46, through a small hole in which the wire passes. The ends of the wire then rest on an anvil 49 formed with a rabbeted part which is at a lower level than the rest. Two mandrels 52, 53 move towards each other over the wire and descend, so as to bend the ends of the wire up at right-angles. Each mandrel can slide horizontally in a bearing 54 attached to a slide 55 which can move vertically in guides. The mandrel is moved horizontally by a pivoted lever 68, one end of which engages a collar 66 on the mandrel, while the other is actuated by a cam 71. The mandrel is depressed vertically, against the action of a spring, by a lever 58 actuated by a cam 65. The eyes at the ends of the link are then completed by two bending-tools carried by levers 78. Each lever 78 carries a tool 76, Fig. 9, and is pivoted to a slide 80 which is reciprocated by a cam 88 acting through a lever 87 and rod 85 against the action of a spring 90. As the slide 80 advances, a roller 81 on the end of the lever 78 rides up an incline 82 so that the tool 76 receives a compound movement, which completes the loop. The tools 76 are formed with inclines on their adjacent faces so that the loops are formed in the same planes as the arms of the link. The bending-tools and the mandrels 52, 53 are now withdrawn, the peg 16 descends, and the finished link is knocked off the machine by a vertical arm jointed to a horizontal slide which is connected with the feeding-gripper. To enable the machine to make links of different lengths, or links having one arm longer than the other, the brackets carrying the mandrels and the bending-tools can be adjusted on the bed of the machine at right-angles to the shaft 2. The levers which carry the tools engage with the cams on the shaft 2 through rollers which are adjustable along the levers. Two blocks 102, 103, fixed on the bed of the machine, support the wire before it is gripped by the bending-tools 27, 28.