Patent GB-903497-A (GB)
Title: Improvements in or relating to methods of securing a wire to a soldering tag, and tools and machines for carrying out such methods
IPC: H04Q1/16
Filed: 1959-11-06
Abstract: 903,497. Assembling electrical components to circuit boards; bending. TELEFONAKTIEBOLAGET L. M. ERICSSON. Nov. 6, 1959 [Nov. 10, 1958], No. 37769/59. Classes 83 (2) and 83 (4). [Also in Group XXXVI] A method of securing a wire to a soldering tag for use in the production of electrical equipment, comprises bending the free end of a wire, to be secured, into a curve by means of a tool, displacing by means of the tool the curved portion, so formed. into a position above the soldering tag, and securing said portion to the soldering tag by deforming said portion by means of the tool. The wire shaping tool comprises two pivoted members 30 and 31 and an intermediate reciprocable slide member 38. The member 30 has a longitudinally projecting ridge 34 which co-operates with the channelshaped member 31 to bend a cable placed between the members into a U-shaped configuration and to strip a portion of the insulation from the end of the cable. Figs. 3 and 4 show a pair of tools arranged side by side so that cutting edges 43 on the members 31 co-operate to form a shearing adjunct. The lower part of the member 31 is provided with a wedge-shaped portion 39 for separating the soldering tag to which the wire is to be soldered from adjacent tags. A groove 40 and guiding lugs 41 and 42 correctly position the bent wire and tag relative to one another in the plane of the tag. After the members 30 and 31 have bent the wire and removed the insulation the slide member 38 is lowered to push the bent wire on to a soldering tag 20 and a projecting end 54 on the slide engages the wire adjacent the bent portion and rotates the latter until it is vertically disposed, whereupon notched blades 51 and 52 on the slide engage the bared end of the wire and squeeze the wire around the tag as shown in Fig. 9. At the same time the notches on the blades push back the insulation from the wire loop in readiness for the final soldering operation. A machine for automatically carrying out the method comprises posts 1 for supporting parallel track rods 2 for slides 3 which carry a bar 4 on which are slidably mounted a support 65 for a vertically reciprocable wire setter 17 and a wire guide 15 and a support 5 carrying tools 6a and 6b. A frame 9 is provided for accommodating a relay set 10, the soldering tags 20 of which are to be connected to the tags 19 of a block 11 supported beneath the tools. Channels 12, 13 and 14 attached to the frame 9 and extending from the block to the relay set receive the wire from the wire feed 61 which is rotatable about a shaft 16. In operation, one end of the wire is held in the tool 6a, the wire extending below the wire setter 17 and through the carrier 15 to the spool 7. The tool is lowered to secure the wire on the tag 19 as hereinbefore described and simultaneously the wire setter 17 pushes the wire into an opening 18 in the channel 12. The wire guide is moved along the channel 12 towards the channel 13, whereupon the wire is seized and pushed into the channel 13 by a wire setter 21 and the tools are displaced diagonally towards the relay 10. The orifice of the wire guide follows the movement of the support 65 but is maintained above the axis of the channel 13 in order to lay the wire in said channel until channel 14 is reached, whereupon the guide stops. The tool holder 5 is aligned above the relay 10 and an electromagnetic feeler 55 locates the required tag. The wire guide is moved along the channel 14 and is arrested above the channel inlet 81, the wire being supported by guiding means 56 on the wire feed 61 and a grab hook 57. The wire guide is then swung to a position 15a so that the wire is seized by the tools which are lowered to cut, bend and strip the wire. The wire setter moves downwardly and pushes the wire into the opening 81 in the channel 14 whilst the tool 6a completes its downward movement and secures the wire to the tag 20. The tool 6b retains the end of the wire in a prepared condition so that by rotating the tools through 180 degrees by means of a control device 66 whereby the tools change places relatively to the machine and returning the wire guide to its initial position the end of the wire can be brought to a soldering tag and a new operation commenced.