US2339589A - Method of and apparatus for winding rotors - Google Patents

Description

Jan. 18, 1944. "H, CpSTEARNSJ 2,339,589

METHOD OF AND APPARATUS FbR WINDING RQTORS H Filed May '7. 1942 s eets-shag 1 Jan. 18,1944. H. c. STEARNS 5 1 9 METHOD OF AND APPARATUS FOR WINDING ROTORS F iled May 7. 1942 2 Sheets-sheaf. 2-

Patented l- I III I I' 'OFAND Jim-um ma f 1 7" I wmnnvc nozro y v MM, chime-m,

I nets Development, lua -Chicago. 111., a oor'no 3- 5 Mutation miq lontsennno'. 442183;;

I I sever-unsure; oi the drawings: a .v 'Iheprimarv I I II I I I I Fig.1 is aside .elevational view ol'the appa-- I y minovel apparatus fortr'inding in 5 "ratus oimy inventlonwith portions'broken away v 'A-rurther obiectfot the inven i n-1H P Q o ti @116" 1 'a"nove'l method'of 'windinzarmatures; j he. 2 is an end elevational view otthe appastill a further object of] theinvention-isle}? mu with, portions broken aw y= and,certain providefa novel method. otjand; apparatus for}. otherportlonshein'gh'shownrln lectic I I W f "111g. 3Ii s a topplan view on enlarged'scale,

showlngthe manner in ohthe wire'is-lald into I jturesin which thewireis laid intothe slots ioi' Manyraotorshavepreventedfthe use unme- 1 chanloztl means tor the Vinding-otarmatures i'or' 1 A further object: 01' the invention is to provide volt'ajgeirvhigmtrequenoy xenerators; such'as -'a novel method of and apparatus for the '2; I or armatures wherein thedanzer of scraplnati ni I v Jurlnz, breaking, or in any way the ,hS,V1I lg atermlnalvoltaze well overa-thouaan'd, I,

resistance of the wire during windine'is 1- '1 and-utilizingiabout ,800 turns of #36 enamel wire; "I nated;

r Another object 01' the inventlonisto' provlde. inche in diameter,

V the method of my invention which m .b ;pog1. ach individual armatu re :inQa Jis' fixture tive inac ion and simple and f -P 1 m" vawher-eby the endsld'tmmm can 13m! t- ;-=Gertain objects otthe invention 11 11: the protha h o withln which -vislon's oi spec fic mechanical movement-where; Ito belaid is substantially an arc oLthe 'eylinder' by a plurality orannatures-are caused to o1 rotation' denned by' the ends orthe' slotsms hr wn acertain'oycleot mechanicalmovementsthe-armature is rotating. The in ordenthatallot said armaturesmaybe s'imul which'the wire is laid down is obviously Bubsta'n- "d. I 3 1 j I tlallyoubical. Flanges areusedtozuide'th'ewlre With 'tl i'Ie j-l'orexoing and other objects in'vie'yv into the slots. r I ,whichjwillappear asthe description proceednthe' I m said prior methods acceleration and delinvention' consists of. certain novel features'ol ce'lemtion or the wire is causeddurinziithe'wind- :co nstruction.' arrangement and comblnationuot In: of the same with resultant'stretching and out in the appended claims, it being understood 4o quentlyacomplete breaking of the wire. In these,

procedure of'the method may bemade without" I from being weakened; Furthermore. 101- each departing from the spirit or sacrinoing any o't'the, slceln wound, a new setting oi the fixture or jig advantages'ot the invention. r ,45: upon which the;armatureis'mounted,'includinga I 'Forfthepurpose' oftacilitating'anvunderstandcomplete removal of the armatureis usually in; of my invention; Iihaveillustrated in the ac-, quireda Also, an attendant is required to operate companying drawings a preferred embodiment of and watch over each. armature windinzdevice. the apparatusthereot' iroma'n inspection or Inprder to maintain any prosramoi' economical I which, when considered in connection with the productionthe-speed-oi' the windingmustbehigh; I 7

construction, assembly,- operation and prae tiee, In my inventioma large number of armatures and many oi its advfantages should be readily; j maybe placed upon a suitable fixture and wires understood and appr'eeiated. I a

. Referring-to the drawings in which thesame ll through appropriate guides and led to the armatures produced by my pulley I 'I and belt theplatform ll provided a cam I II or the like journalled in appropriate brackets ll and adapted to 2| of the segment cam Spacedv along the of bearings 23 each carrying a vertically arranged 1 'ooilet 24 the upper end of which is in the form of a collar 25 overlyint dinary gear 25' bearing 23. To the bottom end of each of the collets 24 a pinion gear ll is keyed or in other manner fixed for rotation with the collet 24. Between each pair of collets 24 a stub shaft II is attached to the platform ll. A, spur gear 21 is attached to the bottom of each 'of the shafts 28 meshing with the gears 25. Instead of an orbeing attached to the bottom of .the end collet shown at the right in Fig. l, a

armatures are each rotated simultaneously in the opposite direction .from the previous rotation laying the wire across the opposite end of i to thereby complete a each of the armatures single turn. The fixture through the same ber of turns has is then once more moved been applied between the two given slots of each armature. when a skein, i. e., the given number of turns, has been applied, the lead wires are pulled from the slots and fas-'- tened temporarily, and each of the armatures is moved in its holder, relativeto the socket a slight amount to permit the wire to be laid into the next given pair of slots. This. is continued until the entire armature inthe 'group of armstures being wound is completely wound. It will be clearly apparent that the time required to wind one armature or the entire group willpbe substantially the same. Obviously only on attendant is needed to watch the entire group and the rate of production is-so great that the speed of winding need be low, permitting a higher quality product and lessening the possibility offaults occurring. Since there is no scraping or cracking of the enamel on the wire, due to the constant tension improved method is very high in comparison with aramtures made by armatures made by prior methods heretofore used. f I

Referring now to the specific details or m invention, the apparatus used to practice same, the reference character Iii designates generally a bench or the like with which my improvedapparatus is adapted to be associated. The bench maybe supported as shown by any appropriate braces H or the like. At one edge of the bench and on each end thereof may be provided uprights I! having slots or V-shaped guides 13 therein for example within which the opposite ends I! of a platform as said platform is moved upand down, said up and down movement being limited by the ends of the guides i3. Journalled in. said braces II is therein, the efficiency of the arms- H are adapted to be guided.

cycle until the required num-L master pinion 28 is so attached. The master gear 28 is considerably longer than the gears 28' for a purpose presently to be described.

' From the. above description it is seen that when the master gear 28.is rotated, each gear 25' and consequently each collet 24 will also rotate an identical amount through the connection of the spur gears 21, and in the same direction.

The gear 28 is adapted to cause each of the colletsto alternately rotate a given number of degrees in opposite directions. The number of degrees of rotation of the collets 24 is the same as the number of degrees between the two armature slots in which the turns of wire are being tures 2! consists of a laminated I 30, provided with a plurality of winding laid as generally explained above.

As shown in the drawings, each of the armasalient pole core slots 3| between the poles 32 extending parallel, to the axis of rotation of the armature 28. Each armature 29 includes a shaft 33 and a commutator it, properly fixed, spaced and insulated by means of'various sleeves, washers, etc.. the arrangement of which is of no moment so far as this invention is cbncerned. Each of the armatures 20 is attached t a collet as, having its shaft is disthe inner passage of the collet and held therein by means of a set screw 30. A flange 31 is providedton the end of the collet 3! so that when same is inserted into the upper end of the collet 2f, the flange will engage and overlie the collar 25 of the collet 24. Obviously the collet 24 acts as a socket for receiving the collet 35. holding same by means of the set screws 30.

Until the armatures 29 are completely wound they are each attached to one of the above described collets or sleeves 35 which is adapted to fit into the center bore of the collet 24. As the collets 24 are rotated alternately clockwise and posed within counter-clockwise, the armatures 29 are rotated a cam shaft i8. Said shaft leis rotated by any appropriate means ride upon the arcuate edge 22 one of which is keyed to each end of the shaft i8 opposite the rollers Obviously as the cams 22 rotate, theplatform i4 will-be raised each time the surface 2| enases the follower la and will be lowered immediately that the surface 2| has been traversed by said follower.

platform II are a plurality the upper endfof the therewith. After each skein has been wound, the I screw 38 is loosened and the sleeve" moved an amount'relative to the collet 24 equal in degrees to the number of degrees between respective poles 32. Any indicating means or measuring means maybe used for this purpose. For example, a

notch system is an ideal arrangement.

In order to rotate the master gear 28 back and forth I have provided asimple mechanism to transmit the motion from the shaft I8. I provide a large gear 29 engaging with the master gear 28 and capable of maintaining its engagement therewith at all times. In other words, the gear 39 is rather thin in comparison with the gear 20 and is Joumalled upon a shaft 40 fixed relative to the bench [0. As the platform I is raised and lowered, the gear 28 will move relative to the gear 39 axially-thereof. Because of the great thickness or length of the master gear 28 the teeth of the gear 39 slide along same while meshingtherewith and consequently armatures 28 can be rotated whether the platform II is up or down,

Referring now to Fig. 2, I have provided a second and smaller segment cam ll keyed or in other appropriate manner aflixedto the shaft i8 and gaged by a stirrup 42 having one end 48 I rotatively mounted on a ilxed v thereby, while having the opposite end 4! formed which it has opposite wall of the stirrup,

-wires into the Thereare as many a complete revolution for each assault and of the shaft "is lever shaft 44 and pivoted as a rider engaging within a notch 40 or the like provided in th face of thegear'fl. :As the cam 4| rotates, each time one of the straight sides 41 thereof engages the inside wall of the stirrup 42 the stirrup is pivotally moved in one'direction.

The stirrup 42 will remain in the position to been moved during the entire time that the curved surface 48 engages the side wall of the stirrup. When ,the cam 4| has its other straight side brought into engagement with the the stirrup will be swung in the opposite direction, in which position it will remain during the surface 48 is in engagement with the second inner wall of the stirrup 42. This cycle will be repeated as longas the device is in operation.

In this manner the rider 45 will describe an arc centered on the shaft 40, and since the end engages the notch or slot 49 ofthe gear 39 said gear will rotate alternately in opposite directions -a given number of degrees. The connection between the freeend 4! of the stirrup lever 42 and the gear 99 may take the form of a ball and socket rider, universal joint, or any of various time that the curved about whereby the "wire fiber paper may be rotating pulley system orgear or chain and sprocket device may be used. I have shown a -Vpulley ll Sgtaohed to the shaft 91 and operated by the In insulating the skeins'of wire which are laid the slots from the rotor 39 usual inserts of used. However, I prefer coating the entire rotor 29 witha film of a liquid insulating material such as varnish or enamel and baking the same to a tough insulating film. This method is described in my copending application. By its use the paper inserts are eliminated.

My improved apparatus may be readily adapted for the winding of armatures having skewed rotors. Thus by substituting an appropriately shaped cam for-the cam 4|, the necessary compound movement of the collets 24 may be brought may be wound within the skewed slots of the rotor in the same manner slider arrangements the exact details thereof being of no great importance. The main purpose is to translate the motion of the shaft I 9 to the armatures 29 so that the movement of the arma- 1 tures will be timed with respect to the raising and lowering of the platform l4 by the cams 22 which are, of course, attached to the same shaft I 8. Various other mechanical connections between gear 39 and shaft II should suggest themselves to those skilled in the art. a

The armatures are adapted to be wound with wire 49 fed thereto by an appropriate needle 90 which is mounted upon the bench ill by means of the bracket 5| The needle is adapted to lay the may be made to extendinto said slots. While I have shown the needle stationary, obviously same could be made with appropriate pable of causing it to move a slight amount outwardly or the like with each turn or so of the slots 3i and, hence extends or mechanism ca- 5 within the purview of my wire in order to cause the wire to be laid evenly.

' However, that is-a mere refinement and not shown is guidedthrougha hanger herein. The wire 49 52 supported on the bench I! from the spool 53. spools I3 as there are arma-' ture units being wound. The spools may be disposed upon the bench H or ranged to rotate on its shaft while at the same time being rotated on an axis perpendicular to the spool shaft. The obvious purpose of this is to prevent the wire 49 from twisting while the armatures 29 are being wound. The spool, be-

generally shown at 56 is provided to maintain the tension in the wire 49. The bracket has a shaft 51 which is rotatively mounted in the bearing 59 supported by the bracket 99. The free may even be ar'- ranged on a separate support. Each spool is artween a predetermined-pair of slots of a rotor which comprises feeding a wire strand to a' feed straight slots. v It should be obvious that the apparatus desame apparatus hereinabove despectto the windinsof rotors with and with the scribed with r scribed herein is more or less representative and that the mechanical expedients used are not intended to be exclusive. For example, the manner of mounting the respective armature units could be'varied in many ways; the rotation of 'the collets 24 may be accomplished by means of belts or 'chains; the translation of the various motions may be accomplished by other means and diiferenttypes of cams'and followers; and

the mounting of the spools may be different than that shown. I

It isbelieved that my invention, its mode of construction, assembly and practice, and many of its advantages should be readily understood from the foregoingwithout further description, and it .should'also be manifest that while a'preferred embodiment of the invention has been shown and described for illustrative purposes, the structural details are nevertheless capable of wide variation the appended claims.

- whet I claim and desire to secure by Letters l Patent of the United States is: u

1. The method of winding a skein of wire bepoint adjacent the rotor and laying the wire upon the rotor, then moving the rotor in a er-- tical direction to lay the wire then turning the rotor into the first slot,

a vertical direction to. slot, then turning the rotor to lay the wire across the opposite end of the rotor to carry the strand; back to the starting point to complete a turn, I

then repeating the cycle of movements until the desired number of turns of wire have been laid in the slots, simultaneously twisting the wire a completerevolution for each turn of wire laid to cause same to lay evenly.

2. A device for winding a skein of wire between,

a pair: of slots of a rotor comprising a wire feed guide, a supporting platform adapted in be moved in a vertical direction, means on said platform for disposing a rotor thereon with its axis perpendicular to said platform, said rotor being disposed adjacent said guide, a shaft adaptedto be driven, means associated with said shaft for the difficulties of adjusting invention as defined in I to lay the wire strand acrossthe end thereof, then moving the rotor in lay the wire in the second upon said rotor.

periodically lifting and lowering said platform,

and means coupled to said shaft for periodically turning said rotor first in'one direction and then form being movable mun of the rotors, and

4 each rotor being rotativeLv mounted upon said platforms. each of said guides being-adjacent in another, said last mentioned means being 'timed'to rotate the rotor in one direction after the platform has been lifted, and in the opposite direction after the platform has been lowered,

thereby executing a cycle of motion capable of 4 causing a wire strand laid onto said rotor by said wire feed guide tube wound in a complete turn 3. A device for winding a in a vertical direction, means on said platform for disposing a rotor thereon with its axis perpendicular to said platform, said rotorbeing disposed adjacent said guide, a shaft adapted to be driven, means associated with said shaft for periodically lifting and lowering said platform, and means coupled to said shaft for periodically turning said rotor first in one direction and thenin another, said last mentioned means being timed to rotate the rotor in one direction after the platform has been lifted, and in the opposite direction after the platform has been lowered, therebyexecuting a cycle of motion capable of causing a wire strand laid onto said rotor by said wire feed guide, to be wound in a complete turn upon said rotor, the upward movementcausing the wire strand to be laid in one slot, the subsequent rotary movement causing the wire strand to be laid across the end to the second slot,'the subseskein of wire between I a pair of slots of a rotor comprising a' wire feed guide, a supporting platform adapted to be moved a rotor and adapted to lay a wire upon said rotor, means for moving said platform in a vertical direction, and means for simultaneously turning each ofsaid rotors a given amount, said moving and turning means being timed so that r each of said rotors is translated through a cycle of movements'past its respective guide whereby a turn of wire is laid upon each rotor at each cycle, said moving and turning means including a cam mechanism periodically lifting and lowering the platform, and a second cam mechanism driving a chain of gears, each rotor bein associated with one of said gears, and a single driver for both of said mechanisms.

7. A machin for winding a plurality of rotors having winding slots, and placing a skein of 4 wire upon each rotor between two predetermined l platform movable and adapted to be guided upwardly and downwardlm; a plurality of rotatable socket devices spaced along said platform and each adapted to have slots, comprising a a rotor removably mounted therein, a plurality .of wire. feed guides arranged each adjacent one of said rotors and adapted to lay a strand of wire upon said rotor, a drive shaft for operating said machine, a" cam mechanism coupled with saidshaft-for alternately lifting and lowering said platform .a given amount.uand a second mechanism coupled with said shaft for rotatquent downward movement causing the wire" strand to be laid into the secondslot, and the final reverse rotary movement causing the wire strand to be laid across the. second end of the rotor completing a turn.

4. A rotor winding machine comprising a plurality of wire feed guides, a platform mounting a plurality of rotors upon their axes, said platform being movable axially of the rotors, and

turn of wire is laid upon each rotor at each.

cycle.

5. A rotor winding machine comprising a plurality of wire feed guides, a platform mounting a plurality of rotors upon their axes, said platform being movable axially ofthe rotors, and

each rotorbeing rotativelymounted upon. said platforms, each of said guides being adjacent a rotor andadapted to lay ,a wire upon said rotor, means for moving said platformin a vertical direction, and means for simultaneously turning each of said rotors a given amount, said moving ing each of said socket devices alternately in' opposite directions an amountequal to the num- I .ber of degrees. between the two slots within which the wire is to be laid, said mechanisms being timed to cause the'rotors to be translated in a cycle of movements past the wire feed guide whereby the wire will be laid upon the rotor and wound between the two slots, each cycle serving to lay one turn of wire upon each rotor.

8. A machine for winding a plurality of rotors having winding slots, and placing a slrein of wire upon each rotor between two predetermined slots, comprising a platform movable and adapted to be guided upwardly and down- ,wardly, a plurality of rotatable socket devices spaced along said platform'and'e'ach'adapted to have a rotor removably mounted therein,'a plurality of wire feed guides arranged each ad-' jacent one of said rotors and'adapted to lay a strand of wire upon said rotor, a drive shaft for operating said machine, a cam mechanism I coupled with said shaft for alternately lifting in opposite directions an amount equal to theand turning means being timed sothat each of said rotors is translated through a cycle of movements past its respectiveguide wherebya turn of wire is laid upon eachrotorfat' each cycle, said moving. and turning 'means' including ,a cam mechanism periodicallyglifting 'and lowering the platform, ands-second cam mechanism driving a chain of; gears-, each rotor being associated withjone of saidgealja f I 6. A rotor winding machine co'mpri ng a plurality of wire feed guides, a platform mounting l a plurality of rotorsupontheir axes, said platand lowering said platform a given amount, and

- a second mechanism coupled withsaid shaft for I rotating each of said socket devices alternately number of degrees between the two slots within which the wire is to be laid, said mechanisms.

being timed to cause the rotors to be translated in a cycle of movements past the wire feed guide whereby the wire will be laid upon the rotor and wound between the two slots, each cycle serving to lay one turn of wire upon each rotor, and means for untwisting said wire while said wire is being laid.

9. A machine for winding a plurality of rotors having. winding slots, and placing a skein of wire upon each-rotor between two predetermined slots, comprising a platform movable and adapted to be guided upwardly and downwardly,

- a plurality of rotatable socket devices spaced along said platform and each adapted to have a rotor removably mounted therein, a plurality of assoQeocj A of movements past the wire feed guide whereby 7 wire feed guides arranged each adjacent one ofthe wire will be laid upon the rotor and wound said rotors and adapted to lay'a strand of wire upon said rotor, a drive shaft for operating said 'machine, a cam mechanism coupled with said shaft for alternately lifting and lowering said platform a given'amount, and a second mechanism coupled with said shait for rotating each of said socket devices alternately in opposite dircctionsan amount equal to the number oi degrees between the two slots within which the between the two slots, each cycle serving to lay one turn of wire upon each'rotor, and a plurality oi reel holding mechanisms forv supportins reels of wire being led to said guides, and,

means operated by said shaft causing said reel holding mechanisms to rotate said reels through 360 for each turn placed upon the rotors thereby 10 preventing the twisting of. said wire while same wire is to be laid, said mechanisms being time'd to cause the rotors to bc in} cycle is being wound upon said rotors. -'HARRYC.S'IEARNS.-

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