Patent GB-361323-A (GB)
Title: Improvements in and relating to machines for winding dynamo electric machines
IPC: H02K15/085
Filed: 1930-08-18
Abstract: 361,323. Coil winding apparatus. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Kayser, A.; 1020, West Jefferson Street, Fort Wayne, Indiana, U.S.A.) Aug. 18, 1930, No. 24681. Convention date, Aug. 16, 1929. [Class 35.] For winding internally a slotted element such as a dynamo-electric machine stator, a rotating arm forms the wire into loops which are then carried by a reciprocating member into the bore of the stator and passed into the slots. The arm 20 is carried on a disc 79 supported so as to rotate freely and actuated by a link 72, Fig. 2, the other end of which is carried on a block 75 sliding in a slot 74 in a rotary disc 70 and guided by a cam groove 69 in a fixed disc 68. The link 72 may be replaced by a rack device. The groove 69 is so formed that the arm 20 stops its rotation while the wire 16 is being carried into the bore of the stator A and makes a slight reverse movement while the wire is being laid into the slots. The wire is carried into the stator by means of a shuttle 101, Fig. 6, sliding on an arbour 92 projecting into the bore of the stator. As the arm 20 carries the wire across the shuttle it slips from a horn 108 on to a roller 105 and is then engaged by rollers 109 carried on pivoted arms 110 and guided by grooves 100 until it is delivered into the slots of the stator, Fig. 9. When a sufficient number of coils have been laid in one pair of slots the arbour 92 is withdrawn from the bore of the stator. For this purpose it is mounted on a block 95 sliding in a frame 96 which can move vertically, the block and the frame being moved by fluid pressure acting on pistons in cylinders 91, 98. The shuttle is actuated by a rocking lever 102 engaging with a slot 103 on the shuttle. To allow for a number or sets of coils of different widths being wound on the same pole a number of, in this case three, arbours are mounted on a disc pivoted to the block 95. The arbours are of widths corresponding to the width of the coil to be wound and are brought into action successively. To enable these operations to be carried out the machine is stopped when one set of coils has been wound by tappets 55, Fig. 5, operating a slide 60 to release a spring- pressed rod 58<A> which actuates a clutch and brake. A hand-operated valve 129 then admits pressure fluid to the cylinders 91, 98 to move the block 95 .carrying the arbours. The movement of the block operates a handle 126b through a spring tappet 126c and through a gear 126 and quadrant 125, Fig, 20. raises a pawl 124 and closes contacts 127 to start a motor 115 which rotates the disc carrying the arbours and also a cam 123 on which the pawl 124 bears until the next arbour is in position, when the pawl falls into a notch in the cam, opening the .contacts 127 and stopping the motor 115. The valve 129 is then operated to put the arbour in position within the stator and the machine restarted by a pedal 22. The motor 115 also operates a cam 146 which moves the disc 68 to adjust the reverse movement of the arm 20 for coils of different widths. The wire passes from a reel 15 through a porcelain bush 181 on the end of a rotating arm 179 mounted on a hollow shaft 177, Fig. 21, and through the hollow shaft to a pulley 185, which can be braked, by a strap 187 and spring 188 and thence to a tension arm 19, Fig. 5. The arm 179 is balanced by an arm 180 carrying an adjustable weight 190 and the shaft 177 can be braked by a weighted strap 184 acting on a friction pulley 182. The tension arm 19 is operated by a piston in a cylinder 19b and is automatically released when the shuttle is changed to allow a fresh length of wire to be drawn off when starting a new coil. From the arm 19 the wire passes through a longitudinal passage in a hollow shaft 30 carrying the disc 70. The shaft 30, Fig. 4, encloses a fixed shaft 31 supporting the stator A and to allow the wire to pass, the shaft 31 is secured by a transversely sliding key 166, Fig. 15, which is operated by a cam so that its lower end engages with a slot 168 in the fixed outer ring 169 when the wire is at the upper part of its travel and its upper end engages when the wire is at the lower part. Different forms of arbour are described, including one arranged to leave a space between the coil and the end of the stator to allow for contraction and expansion.