US2516734A - Apparatus for winding wire on an annular body - Google Patents

Description

July 25, 1950 H. J. VAN DEN BERGE ET AL 2,516,734

APPARATUS FOR WINDING WIRE ON AN ANNULAR BODY Filed Feb. 6, 1947 H. J. VAN DEN BERGE& C- G.SCHRAMEYER INVENTORS AGENT Patented July 25, 1950 UNITED STATES 2,516,734 APPARATUS FOR WINDING Winner; AN ANNUL BQDX H ndrik an van den rardg s Sehrameyer,

Berge and .COI' JQ Einflhqvgn, Netherlands,

assignors to Hartford N ation'aLBank and Trust Company, Hartford,

Conn, as :trustee epp iee iqnlli bru ry 47, Serial 0,7 6,88

, In theNcther n-ds 16, 19.954

' Sectionl, "Public" Law 693, AugustB, 1946 Patent expi s Meylfirififie .ifilaims,

well known windin eppere us .f r w ndin wire on an annular body e cpnstit ennnlerchute driven 219 395 113 p netes the wire stock fart pf thisan is removable to permitcf rtheehi te duced in o the space encl sed by the-r 1; body. After-introduction of this hute the 113' moved portion is again insertedend ,t-he'length oiwire required forthe erreneeline tot e sin l winding :.on1the annular body :is then Wound 9.11. he .ennuiar chute from, an independents- 1911115 reel, The ,end of this wire sseenred toe p int intended'for'this purpose of the nnuler :lQQdv-te be-wound. Byi-rotation ,of-this annular chute'and the body to be woundabout their. respective agres, the winding ispl-eeed. in position. 'Whenthe body to be wound is ready the supp y 'OfvWiI'e on the annular chute should be completely; used in order to'perm-i-t of the .ehute being openedpand' the wound body being removed. {For each Wi din therequired length of wire must eonsequently -be wound again on the annular chute and this sip? preciabiav prolongs the duration of the manufnc, wture'inthe mass-production of wound annular bodies such as Pupin .eoiis, annniarxibodies, Wilifi wound control resistances or the like, According to theinvention, the manufacture of such windings is considerablysimpiified-by-the fact that'tthe stock of wire'is .constituted'bye. reel adapted to rotate about a spindle fastened to e ring-segment shaped carrier driven in e circular :path, this reel being provided 'withmeansofcon- 'sta-ntlykeeping the Wire taut between this reel and the body to be wound.

'Winding anannular stock beforehand with measured length of Wire can thus be omitted, as, without difiicuity, the stock reel may nomp'rise a quantity of wire for a plurality of bodies to he wound, since, when an annular body is wound, the wire can be broken on and the Wound body can he removed throughthe opening "between the ends of the ring segment.

The next body to be :wound is insertedythezbeginning of the wire is again secured to e, point in,-

tended for this purpose and the winding machine I:

is again put intoeperation. The gapbetween the :ment is also possible, if use is madeiof at "least two driving members which are spaced apart a greater distance than the gap between the ends :ofthe segment. Whenthe stock reel is empty,it need noti-be rewound ion'a machine, but-a full-reel 155 :ph ngnthe example of 100 microns and Jess.

e -einetter oisoiirse, the eter ofi-e hee ed nthecerrie s i ,ited by he-shee he i ,er nrofiie bedy to-he WDBLIQ; T in Wires, s h; fer e ample, as re: sistsncev :for wind ng th -ermine resistance hedies 1 owe e be e r nged, W th ut di culty, on reels having a-dqiemetei-Qf-ID millimeters endless- During the winding of the wire ,aheut the an? er body he snenle r elis li ts tlyr teti 1D stile "he-1 63 5 1 51 3 i the eer er during eviiie the enemy reel szmov ng ewey a n he E n of i nu led ne olu on a s ightly mu ga n b w un 'uun in. upply e epprn e me the hed to be weunsi. In. de thetthe Wi e in pEQ -TIO enneier bed ten t e af resa ar p ed or he p teetthe ien t of wi e be ween the. ree -end hhdv 9 T138 wound These s prn s. eli h a .Qn trneted 1 n e greetest't e t t be est the se ies i eeheb e o s he -reve auti nci the qiientlv eff,

1 the.seeendhe se eiut en wound by th stretched shr ne.- rom-1 t ue ztusmiviewneintt ese meens er-ev ry .p

" p rtieulercentre memb i mev be emitted i mi ht be looked use-nest e e-Wheel: thetier putting -the' irietiene1uten. so on on e net ,brnhtvpuimt-thewi dine'w eifi d he'efozreseit did e0 de hveeushew reel the @Shllldi? 9i elseturned against the action of the electric field and the electric current. Such a coupling may operate smoothly, but has the disadvantage of requiring particular members for the supply of current to the electric motor seated on the rotary carrier.

According to one embodiment of the invention the aforesaid disadvantages can be avoided in that part of the supply reel contacts at any time with a stretched rope which is stationary relatively to the carrier of this reel and concentric to the circular part of the carrier. By the supply reel travelling along the circular path traversed by the carrier, this reel is driven, so to speak, by the rope moving relatively past it and that in such manner that this movement results in the wire being always wound up. During the first half-revolution of the carrier the rope slips over the periphery of the reel moving in the opposite direction, the winding wire thus remaining constantly under tension.-

The friction between this rope and the reel is very even throughout the path of the reel, so that the occurrence of shocks in the winding wire is avoided. The magnitude of this friction is' adjustable by varying the tensile stress in the rope. In addition, this fiex takes very little room, sothat the space available for the supply reel in the inner profile of the body to be wound is practically not restricted.

In order that the invention may be clearly understood and readily carried into effect, it will now be set out more fully with reference to the accompanying drawing, in which one form of construction is shown by way of example.

Fig. 1 is a front view of a winding machine according to the invention.

Figs. 2 and 3 are sectional views of several parts of this winding machine.

The winding machine consists of a vertically arranged base plate Hi, to which a circular plate is fastened by means of a plurality of bolts I3. The circumference of this plate is profiled in such manner that inter alia between this plate and the base plate It a circular groove having a rectangular cross-sectional profile I5 is formed. A flange of a ring segment H5 is adapted to move in this groove. This ring segment l6 serves as a movable carrier for the supply reel I! which is provided with the Winding wire. This supply reel is'seated on a spindle l8 secured to the carrier l6.

' The base plate Ill and the circular plate l4 fastened to it comprise a rectangular hole H which extends inwardly from the periphery of the base plate and whose size is sufiiciently large foraccommodating the biggest body to be wound.

The ring segment extends through an angle exceeding 180", so that it is held in the groove I5 rotatably but nevertheless unremovably. The angle is smaller than 360, so that between the two ends I!) of this segment an opening of the same order of magnitude as the height of the aforesaid recess H is left. This opening serves for the insertion into the ring segment "5 of an annular body |2 that may be entirely closed, in

such manner that during the movement of the 4 I The two gear-wheels 2| and 22 are spaced apart a greater distance than the shortest spacing between the endsurfaces [9 of the'segment, so as to permit one of the gear-wheels 2| and 22 always engaging the ring segment and ensuring the drive of this segment.

' The ring segment i6 supports not only the supply reel I! already mentioned but also a guide roller 23 for the winding wire, said roller being secured to a spindle 24 which is also fixed to the segment It. When the ring segment is caused to rotate by means of the two gear-wheels 2| and 22, the stock reel IT as well as the guide roller 23 will move periodically through the space enclosed by the annular body 2 to be wound and their path will be closed again outside this body. The winding wire 25 whose end is secured beforehand to a point of the body I2, will, owing to this movement in a plane through the cylinder axis of the annular body [2, be wound about the annular body l2. The ring I 2 is supported, however, upon an arm 26 adapted to rotate about an axis 21 parallel to or coinciding with the axis of the annular body l2. During the winding operation this aim is constantly rotated by means of a gear-wheel 28 and a toothed rack 29 engaging it, so that as a result the wire 25 is wound helically about the body l2.

-During tlie rotary movement of the ring segment IS the distance between the wound section oftbe body |2 and the guide roller 23 or the supply reel ll respectively, is periodically increased and decreased. Owing to this relative movement of the stock reel or the guide roller, respectively, and the body to be wound a length of winding wire must periodicallybe uncoiled and then a length, if slightly smaller, must be rewound. For this purpose a separate drive of the stock reel I1 is required and this drive must be active in any case while the wire is being wound on the reel. For the sake of simplicity a rewinding device is chosen which constantly tends to cause the stock reel to be rewound, but which by the intermediary of a slip coupling also allows of the reel being uncoiled. The means for accomplishing this end comprises a rope 3| arranged in an annular groove 30 of plate M. This rope is secured at one end to a fixed point 32 of the base plate I!) and at the other end is subjected to the tensile stress of a retracting spring 33 variable in length. This rope is over a substantial part of its length concentrically arranged to the ring segment IS; in addition it is led through a groove 34 of the stock reel |1 specially provided for this purpose and through a groove 35 of the guide roller 23. During the movement of the ring segment l6 and the stock reel H and guide roller 23 fastened to it, this rope which is stationary relatively to the moving ring will cause the stock reel and the guide roller to rotate in a direction opposite to the one in which the ring segment moves. The winding wire 25 is wound on the stock reel in such manner that during the movement of the ring segment I6 this wire is wound on the stock reel in the direction indicated. During a half-revolution, when wire is to be uncoiled, the rope 3| slips over the grooves 34 and 35 of the stock reel and guide roller respectively; as soon, however, as the wire has reached the maximum length and the stock reel moves again in the direction of the body |2 the wire will be rewound at once, without any slack being produced in the wire.

The force with which the wire must be wound up varies with the thickness and the rigidity of the material of the wire 25. This force is variable by changing the tension of the spring 33, so that the winding machine can be rendered suitable for differing forms of wire. The part of the rope which is not located in the grooves 34 and 35 of the two rollers, lies in the circular groove 30 provided in the periphery of the circular plate 14. In order to prevent an interruption of the drive the rope 3i is located in the groove 30 for more than a complete turn. Similarly to the grooves 34 and 35, groove 30 has therefore a width which is slightly greater than double the thickness of the rope 3|. By soaking this rope with oil, the friction with the rollers ll and 23 can be rendered very even, so that this winding machine permits the use of wire having a thickness of 20 microns.

The stock reel H has a given wire-wound width, so that the point from which the wire leaves this reel varies as the reel is uncoiled. Such a shifting of the wire would involve that the point at which this wire reaches the section to be wound is not a fixed one. For a correct guiding of the wire, provision is therefor made of the guide roller 23 whose circumference is provided with a V-like profile. The uncoiling wire always remains in the apex of the V, no matter from what point of the stock reel the wire comes. This guide roller 23 is also driven from the rope 3| in order that the acceleration forces which inevitably occur during the change of the direction of rotation of this roller when changing from the periodical winding to the periodical uncoiling of the wire may not be detrimental to this wire. It is also possible to have this guide roller 23 acted upon by a separate carrier, for example, by a carrier which concentrically to the carrier shown is located in or outsid the latter.

In this case the drive of this roller may either be omitted completely or be effected by separate means in an appropriate manner.

What we claim is:

1. In a wire winding machine of the type including a wire supply reel, an annular body to be wound, and rotating carrier means for moving said reel in a circular path through said annular body, in combination a wire tensioning means comprising an elongate flexible member stationary with respect to said carrier and arranged substantially concentric with the same, part of said member being arranged in contact with the wire supply reel in a position enabling it to rotate said reel around its axis in a direction opposite to the direction of its travel on said carrier, for taking up slack wire during the period when said reel moves toward said annular body.

2. In a wire winding machine of the type including a wire supply reel, an annular body to be wound, rotating carrier means for moving said reel in a circular path through said annular body, and a stationary support for said carrier, in combination a wire tensioning means comprising a rope stationary with respect to said carrier, a circular groove on said carrier support adapted for receiving said rope in substantially concentric arrangement with said carrier, one end of said rope being attached to a fixed point on the frame of said machine, the other end of said rope being resiliently held on said frame, and an intermediate portion of said rope being arranged in contact with the wire supply reel in a position enabling it to rotate said reel around its axis in a direction opposite to the direction of its travel on said carrier, for taking up slack wir during the period when the reel moves toward said annular body.

(ill

3. In a wire winding machine of the type including a wire supply reel, a guide reel associated therewith, an annular body to be wound, notching carrier means for moving said reels in a circular path through said annular body and a stationary support for said carrier, in combination a wire tensioning means comprising a rope stationary with respect to said carrier, a circular groove on said carrier support adapted for receiving said rop in substantially concentric arrangement with said carrier, one end of said rope being attached to a fixed point of the frame of said machine, the other end of said rope being resiliently held on said frame, and an intermediate portion of said rope being arranged in contact with the wire supply reel and with the guide reel in a position enabling it to rotate said reels around their respective axis in a direction opposite to the direction of their travel on said carrier, for taking up slack wire during the period when the reels move toward said annular body.

4. In a wire winding machine of the typ including a wire supply reel, a guide reel associated therewith, an annular body to be wound, rotating carrier means for moving said reels in a circular path through said annular body, and a stationary support for said carrier, in combination a wire tensioning means comprising a rope stationary with respect to said carrier, adjustable spring means mounted on the frame of the machine for attaching thereto one end of said rope, the other end thereof being secured to a fixed point on said frame, a circular groove on said carrier support adapted for receiving a portion of said rope in substantially concentric arrangement with said carrier, a circular groove each in said wire supply reel and said guide reel for receiving other portions of the rope thereby enabling it to rotate the said reels around their respective axis in a direction opposit to the direction of their travel on said carrier, for taking up slack wire during the period when the reels move toward said annular body.

5. In a wire winding machine of the type including a wire supply reel, an annular body to be wound, rotating carrier means for moving said reel in a circular path through said annular body, in combination a wire tensioning means comprising an elongate flexible member stationary with respect to said carrier, adjustable spring means mounted to the frame of the machine for attaching thereto one end of said flexible member, the other end thereof being attached to a fixed point of said frame, part of said flexible member being arranged substantially concentric with said carrier means, another part of said member being arranged in contact with the wire supply reel in a position enabling said member REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,140,729 Welton May 25, 1915 1,484,409 Pierce Feb. 19, 1924 1,500,984

Derry July 8, 1924

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