GB894013A - Improvements in or relating to wire coiling machines - Google Patents

Abstract

894,013. Coiling. GENERAL ELECTRIC CO. Ltd. March 14, 1960 [March 12, 1959], No. 8611/59. Class 83 (4). A machine for coiling a wire on a mandrel to form a filament is characterized in that the wire is guided to the mandrel during coiling at an angle thereto and after coiling the wire guide is moved so that the wire end extends parallel to the mandrel. Wire 4 from a reel 3 passes through a tube 5 to be held by jaws 21 on a support 7 on carriage 6. The carriage is then moved towards a chuck 13, the jaws 22 on which are then closed to grip the end of the wire, a lever 12 carrying one of the jaws 21 is then pivoted away from an anvil 11 carrying the other jaw 21 so that the wire passes around a peg 17 on the lever 12 and extends therefrom towards a mandrel 14 at an angle of approximately 80 degrees to the mandrel axis. The mandrel 14 is then advanced through a hole in one of the jaws 22 of the chuck 13 to and through a hole 15 in the anvil 11. The chuck 13 is then rotated and the carriage 6 moved away therefrom so that the wire passes over the peg 17 and a rounded edge on the anvil 11 on to the mandrel 14 to be coiled thereon. During coiling an electric current is passed through the wire from the peg 17 to the mandrel 14 to set the turns. At the completion of the coiling the chuck 13 is stopped and the lever 12 is swung back into its original position to bend the wire back against the anvil 11 until it lies parallel to the mandrel 14. The lever 12 is then swung back slightly to release the wire from the jaws 21 and the carriage 6 is retracted to cause the mandrel 14. to be withdrawn from the hole 15 in the anvil 11. The lever 12 then grips the wire again, Fig. 6, and a pair of cutters 23 sever the wire between the coil 24 and the anvil 11. The mandrel 14 is then withdrawn and the jaws 22 opened to drop the coil. To ensure that the ends of the coil are in alignment with one another or are offset by a specified amount around the circumference of the coil compensating means are provided to rotate the coiling head support 7 through a predetermined and adjustable angle during coiling. Said means comprises, Fig. 7, a rotatable arm 30 driven by the mechanism which moves the carriage 6 and linked to a curved lever 25 pivoted at 27. The lever 27 moves, through adjustable link means 28, 31, an arm 32 in a shaft 33 geared to a wheel 10 which turns the coiling head support 7.