GB334955A - Improvements in or relating to coil-winding machines - Google Patents

Abstract

334,955. Macadie, H. S., and Automatic Coil Winder & Electrical Equipment Co., Ltd. June 14, 1929. Coils, machines for making.-In a machine for winding coils, usually of enamelled or covered wire, wherein sheets of paper or other insulating material are fed between the layers of wire, the length of the sheets is automatically increased by means controlled according to the diameter of the coil as it increases during winding. Wire from one. or more supply reels passes over spring controlled tension arms to a traverse guide 50, Fig. 2, to the coil 27 which is mounted on an adjustable spindle 24 driven by an electric motor 22 which also drives, through variable friction gearing 32 - - 34, a traverse screw 31 having oppositely threaded portions 46, 47 alternately engaged by half-nuts carried at the ends of a bar rocked at the end of each traverse by a pusher rod 42, which engages adjustable abutments 48, 49 on a guide bar 35, and on which is a spring controlled abutment co-operating with a pointed cam member to effect the engagement of the half-nuts. The traverse assembly is reciprocated on guide bars 35, 36. The paper &c. is fed from a roll on a spindle 67 under a guide bar 72, between a bar 73 and an upper spring plate 74 constituting restraining means, to a conveyer 75 comprising rubber belts 78 on rollers 79, 80, the shaft 81 of the roller 80 being driven by the pulleys and a belt 84, from the shaft of the traverse screw 31. Guide plates 97, 98 are adjustably mounted at the sides of the conveyer. At the forward end of the conveyer the paper passes under a presser roller 93, frictionally driven from the conveyer acting through the paper, and over guide fingers 88 adjustably mounted between the belts 78, and is pressed on the coil 27 by a plate 95 pivotally mounted with a spring 96. The coil presses down on a sponge-rubber tyred roller 102 on a spindle 104 mounted on one arm of a bell-crank lever 105, 107, having a spring washer &c., at the pivot, to maintain the roller in the position of greatest displacement when winding non- cylindrical coils. The arm 107 carries a stud 110 adjustable along the arm and holding a screwed rod 111, &c., for adjustment of a chain 112 connected to a rotary control member comprising a cam 113, a pulley 114 and an abutment 115, Fig. 8, all fixed on a spindle 116. The cam 113 controls the time of cutting the paper, severing being effected by a knife 128 pivoted at 129, Fig. 2, co-operating with a stationary blade 148 beneath the paper, above which is a spring plate 149 to maintain the paper against the blade 148. The knife 128 is held on a bracket 151 having jaws embracing an eccentric 152 intermittently driven bv a ratchet wheel 155 on the countershaft 81 engaging a pawl 153 pivoted at 154'on the eccentric and pressed into engagement by a spring 156. During the rotation of the eccentric the tail 158 of the pawl engages one arm 159 of a bell-crank lever 159, 160, Fig. 7, thereby stopping the knife which is re-started by displacing the lever against pressure from a spring 161. This is effected by an arm 163, on a rod 167 in guides 168 on a slide 170, the arm being moved by a Bowden wire 139 connected to a disc 137 on the traverse assembly. The disc is turned by a pusher bar 138, Fig. 7, engaging the abutments 48, 49. A bracket 169 on the slide 170 engages the cam 113 thus positioning the slide and controlling the time of starting the knife eccentric. As the knife 128 rises after cutting the paper, it engages one end of a lever 130, Fig. 12, the other end of which presses down an arm 123 carrying a spindle 120 of a contact wheel 121 having a spring 133 and an arm 122 with teeth 135 at its end. The wheel 121 is maintained pressed against the paper on the conveyer 75 by a spring detent 127. The conveyer thus feeds the paper forward and rotates the wheel 121 and the arm 122 until the teeth 135 engage those of a wheel 134 on the shaft 81 which thereupon forces the arm 122 endwise to move the spindle 120 and wheel 121 away from the paper where it is held by the detent 127. The spring 133 then returns the wheel 121 with the arm 122 back until the latter engages the abutment 115. Thus the length of paper fed forward depends on the setting of the abutment 115, which is controlled by the roller 102 contacting with the coil. The machine may be arranged to feed the paper between alternate pairs of layers of wire. Specification 322,999, [Class 120 (ii), Spinning, twisting &c.], is referred to.