Patent GB-1356801-A (GB)
Title: Multiple coil-winder
IPC: H01F41/06
Filed: 1971-05-24
Abstract: 1356801 Coil winding apparatus G CAMARDELLA.24 May 1971 [23 May 1970] 16536/ 71 Heading D1J A multiple coil-winder comprises a rotatable table 40, Fig. 1, driven by a main motor 6, a plurality of rotatable mandrels 99 each mounted on the periphery of the table 40 and each drivable by the main motor 6 through a respective disengageable clutch 17, Fig. 6, each mandrel 99 having a wire guide 94 mounted on the table 40 for reciprocal movement parallel to the mandrel axis for delivering wire from a supply spool 65 to a coil core mounted on the mandrel 99, a control device 72 for controlling both the movement of the wireguides 94 and the engagement of each of the said clutches 17, and a support 111 for supply spools 65, the spool support 111 being rotatable co-axially with the table 40 by the main motor 6. Motor 6 drives a variable speed transmission 49 that is manually adjustable via a control handle 50. Transmission 49 has an output shaft 58 that drives (a) gear box 60 to give an intermittent motion to bevel gear 59 driving the table 40; (b) a sun gear 61 that is rotated at constant speed and rotates a creel support 111 for the supply packages 65, 66 and associated tension means 67, 68. The speed of the creel support 111 is equal to the average speed of the table 40. Clutch control of mandrels. The mandrels 13 are mounted on shafts 15, Fig. 6, and each shaft 15 passes through a clutch assembly under the control of electromagnets 18 and 20. The clutches and the mandrels are carried by the table 40. The electromagnets 18 and 20 are energized via concentric slip rings (82, 83), Fig. 8 (not shown), carried by a disc 81 rigid with the shaft 2. Each electromagnet is, however, controlled by a micro-switch, these micro-switches being operated by cam means (85, 85'), Fig. 5 (not shown) carried by the control device 72. The intensity of the current supplied to each electromagnet is controlled by a rheostat.  High speed drive to the mandrels 13. When a magnet 18 is energized a pinion 14 locks with its associated shaft 15, the pinion 14 being continually driven by a wheel 10. Fig. 2 shows how eight of twenty four mandrels 13 are driven by four wheels 10 via a belt 11 and a crown gear 7a. Crown gear 7a is driven by a motor 6 through gearing giving a high speed of rotation to the mandrels 13. Low speed drive to mandrels 13. When a magnet 20 is energied, and the associated magnet 18 is de-energized, a sprocket wheel 25 locks with the shaft 15. Fig. 3 shows how eight of twenty four sprocket wheels 25 are driven by a single sun sprocket wheel 35 via a belt 36. Sprocket wheel 35 is driven by a continuously rotating motor 32, Fig. 1, to give a low speed of rotation to any mandrel driven thereby. The current through the electromagnet 20 for the "slow" speed clutch is variable to control the maximum torque which the clutch will transmit to the shaft 15. This enables the slip in the clutch 20 to be set such that the time taken for the speed of the shaft 15 to drop from "high" to "slow" speed can be adjusted.  Sequence of speeds. Each mandrel 13 commences its winding operation with its associated high speed drive engaged by magnet 18. This drive is maintained until the table 40 has nearly completed one revolution whereupon the high speed drive is disengaged and the low speed drive is engaged by magnet 20. After a short delay magnet 20 is de-energized and the mandrel 13 is brought to a halt by de-energizing a magnet 41, Fig. 6, to permit a spring 42a to push a pin 42 into a slot 27 in a disc 26 rigid with shaft 15. Supplementary turns. When a mandrel 13 has been brought to a halt it may be desirable, whilst the table 40 moves said mandrel through further operating stations, for the mandrel to rotate through one or more turns (for example to effect taping). For such purposes, the electromagnet is energized for a brief instant to retract the pin 42 and free the disc 26. Thereupon clutch 18 rotates the shaft 15 for one or more revolutions until it is again stopped by engagement of the pin 42 in slot 27.  Counting. Each shaft 15 has a revolution counter (46), Fig. 6a (not shown), allowing a visual checking at intervals of the number of turns wound on a coil. The counter is reset to zero by engagement of a lever 47, Fig. 6, with a lug 48, Fig. 1, on the winding frame. Traverse. The traversing apparatus for each mandrel 13 includes a pulley 94, Fig. 1, that is rocked back and forth by a guide 91 sliding on a column 90. For this purpose there is provided alongside the column 90 another column 100 on which a slide 101 is guided The slide 101 has a finger 102 that: is spring biassed against a saw-tooth cam 78 common to all the mandrels. An arm 104, pivoted at 105, couples the sliding guide 91 to slide 101. The cam 78 is oscillated relatively to the table 40 by means that makes allowance for the fact that the table 40 is advancing in steps, the allowance being such that table 40 rotates at constant speed relative to the cam 78. The cam 78 has a movable sector (92), Fig. 5 (not shown), to determine the instant at which a winding shall terminate, e.g. to prevent the end of the wire winding of a coil being at some intermediate position between the ends of the coil.  Traverse length. By adjusting the location of the pivot point 105 of the arm 104 the traverse length can be adjusted.