US1557259A

US1557259A - Device and method for assembling armatures

Info

Publication number: US1557259A
Application number: US382089A
Authority: US
Inventors: George H Leland; Robert H Ahlers
Original assignee: Dayton Engineering Laboratories Co
Current assignee: Dayton Engineering Laboratories Co
Priority date: 1920-05-17
Filing date: 1920-05-17
Publication date: 1925-10-13
Anticipated expiration: 1942-10-13

Description

Qct. 13, G. H. LELAND ET AL DEVICE AND METHOD FOR ASSEMBLING ARMATURES Filed May 17, 192 5 Sheets-Sheet 1 Mfisses [2702 722775 hula wad flfizfzgg Z MMJMJ/ma' Oct. 13,1925.

. G. H. LELAND ET AL.

DEVICE AND METHOD FOR ASSEMBLING ARMATURES Filed May 17, 1920 5 Sheets-Sheet 5 w 4 M 1 ifffi,

G. H. LELAND ET AL DEVICE AND METHOD FOR ASSEMBLING ARMATURES Oct. 13, 1925 Filed May 17, 1920 5 Sheets-Sheet 4 L A D N A L E L H G 5 2 9 1 3.. 1 M

DEVICE AND METHOD FOR ASSEMBLING ARMATURES Filed May 17, 1920 5 Sheets-Sheet 5 Patented Oct. l3, 1925.

UNITED STATES PATENT OFFICE.

GEORGE E. LELAND AND ROBERT H. AHLERS, OF DAYTON, OHIO, ASSIGNORS TO THE DAYTON ENGINEERING LABORATORIES COMPANY, OF DAYTON, OHIO, A. CORPORA- T1011 01' OHIO.

DEVICE IETHOID FOB A$SEMBLING ABMATUBIB.

Application flle'd Kay 17, 1920. Serial No. 882,080.

To all whom it may concern:

Be it known that we, GEORGE H. IJELAND and ROBERT H. AHLERS, citizens of the United States of America, residing at Dayton, county of Montgomery "and State of Ohio, have invented certain new and useful Improvements in Devices and Methods for Assembling Armatures, of which the following is a full, clear, and exact description.

This invention relates to the manufacture of armatures and more particularly to the art of securing a plurality of wires in the open slot of an armature core.

The principal objects of the present invention are to provide a method and apparatus for insertingmicarta, paper, or other strips in theopening in an armature slot to hold a plurality of wires in the latter whereb the cost of manufacturingthe cores is re need and greater uniformity in the product is secured.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawing,-wherein a preferred embodiment of the present invention is clearly shown. 7

Referring to the drawings:

Fig. 1 is a perspective view of the device used in assembling armatures;

Fig. 2 is a perspective view of a retainer strip to be inserted in the armature slots by the device shown in Fig. 1;

Fig. 3 is a perspective View of a removable magazine'container forming a part of the device;

Fig. 4 is a plan view of the device shown in Fig. 1;

Fig. dis a side elevation of the device shown in Fig. '1;

Fig. 6 is a sectional view taken along the line 6-6 of Fig. 4;

Fig. 7 is a view similar to Fig. 5, the parts being shown in their respective positions immediately after the operation of inserting the retainer strip in the armature slot has been completed;

Fig. .8 is an enlarged front view of the device; I

Fi 9 is'a view showing the device entering t e armature slot, a portion of the device being shown in elevation while a portion of the armature core includin one slot is shown.in section.. '1 'his viewlustrates the device forcing the armature windings down into the core and having its knife inserted between the periphery ofthe core and the surrounding insulating lining material;

Fig. 10 is a view similar to Fig. 9, the device, however, being shown in part section taken along the line 1010 in Fig. 7 and illustrates the step of folding the cut edges of the insulating lining material against the windings in the slot;

Fig. 11 is a fragmentary sectional view of a portion of the armature core showing the retainer strip inserted in the armature slot between the turned down edges of the insu-c lating material and the restricted edges of said slot;

Fig. 12 is a side elevation view showing the device being forced into the armature slot by means of a power controlled hook, a part of the armature being broken away. The device is shown in a position where the forcing down operation, cutting operation and folding operation have been in progress and the strip inserting operation about to start;

Fig. 13 is a view similar to Fig. 12 and shows the position of the different elements at the completion of the operations;

Fig. 14 is a sectional view taken on the line,14-14= of Fig. 12;

Fig. 15 is a side view of a modified form of the device; and

Fig. 16 is a side elevational view partly in section of the device shown in Fig. 15, the

device bein in extended position in Fig. 16.

In assem ling armatures, it has been the practice, after the laminations of the core have been secured to the armature shaft, to face the core teeth and to line the core slots with a continuous strip of insulating material which covers the interior surfaces of the slots and the periphery of' the core. Thenthe windings are inserted in their respective slots. The operator then forces the turned down against the windings in the slots. The next operation completes the assembling of the armature by inserting a retainer strip, which in: the form shown consists of stiff insulating material, in the slots on top of the turned down ed es of the lining material, for preventing tie windings fl ing out, due to centrifugal force when t e armature is in operation.

From the aforegoing description it can be clearly seen that this method is slow, necessitates a series of 0 erations requiring a separate tool for eacii operation, and that between the operations of driving the windings together and inserting the retaining strip the windings loosen and increase the difliculty of inserting the strip.

Referring more particularly to the Figs. 1, 4, 5, 6 and 7, the device is shown comprising a relatively movable portion whichv may be termed the pilot member and a relatively stationary portion which may be.

termed the housing member.

If order to simplify the description and thus permit a clearer understanding of the construction of the device, the pilot member will first be fully described.-

The pilot member is designated by the numeral 20 and comprises a guide portion 21, provided with web and flange portions, 22 and 23 respectively. At the forward extremity, the guide, web and

flange portions

21, 22 and 23, are rounded off in order to facilitate their introduction into the slots of the armature as will be fully explained hereinafter. As is shown in Figs. 8 and 9, the under surface of flange portion 23 is concaved for purposes to be set forth.

In the web portion 22, and adjacent to the forward extremity thereof, there is rovided a transverse slot 24 (see Fig. 6) a apted to receive a knife 25. This knife-25 has two angularly arranged cutting surfaces 26,'the apex of the angle between these two cutting surfaces being adapted to abut against the forward end wall of the slot 24. The body portion of the knife 25 is rounded off as at 27 in order to permit the knife to be swung into position in the slot. A vertical set screw 28, is adapted to be screwed into the guide portion 21, of the pilot member 20, the screw being of such length as to ermit its lower end to enga with the kni e 25 in the slot 24, to secure y hold said knife in. the esired position; A in 29 passing transversely through the guide portion 21, and having portions thereof projecting on each side of said guide portion is also held -in position by the screw 28 passing therethrough.

Another pin 30, is provided in the top of said guide portion 21 and is so located as to act as a stop for certain movable parts explained hereinafter.

Adjacent to the slot 24, a notch 31.is provided which spaces the web 22 and the flange 23 froma web 22" and a flange 23, aligned respectively with web 22 and flange 23. This notch 31 is so formed as to have a face 32 substantially perpendicular to flange 23 at its forward side while the opposite face is inclined as at 33 to gather or fold the edges of an insulating paper over the windings. The web portion 22 between the notch 31 and theforward extremity of the guide 21 is of smaller transverse dimensions than the web portion 22" on the opposite side of said notch. This web portion 22 is provided with flange portion 23 for only a part of its length, some of the flange portion being cut away to provide a receptacle for the retainer strip as will be explained later and to permit the withdrawal of the pilot or guide bar radially from the slot.

By referring particularly to Fig. 6, the pilot member 20 is shown having an enlarged body portion 34. Adjacent to the pilot member and in said body portion there is provided a chamber 35, adapted to receive the retainer strip magazine 36.

A recess 37 is formed in the body portion 34, at each endof the chamber 35. Each of these recesses contains a latch member 38 fulcrumed on the pin 39 and held in normal or looking position by the coil spring 40. These latch members 38 are adapted to hold the retainer strip magazine 36 in position within the chamber 35.

Adjacent to the lower forward end of the chamber 35 and adjacent the inner end of the web portion 22, there is tovided a detent 42, slidabl arrange n a recess 41 formed in the dy 34. This detent has a cylindrical upper guide portion 43, see Fig. 5, and a rectangular lower portion 44. The bottom of this rectangular lower portion 44 is slightly inclined as at 45 for purposes hereinafter described. \Vhere the cylindrical and rectangular tions of the detent 42 'conjoin a shou der is formed which engages with astop 46 secured to the web portion 22 in any suitable manner to retain the detent in the recess 41. A- coil spring 41' tends to normally hold the detent in a depressed position to engage a retaining strip carried by the housing member.

The body portion 34 is provided with a slot 47, and a in 48 extends across slot 47 and is attached to one end of a spring 49 (Fig. 6).

Holes. 50, are provided to reduce the weight of the body 34. I

Body 34' hasa reduced shank portion 51 on which is mounted handle 52 secured thereto by means of the screw 53.

Referring to Figs. 3 and 6, the retainer strip magazine 36 comprises a receptacle 53 which is adapted to holda plurality of I insulating material. A cover plate is secured to the cover plate of the magazine 36,

is adapted to engage, to hold the plate 57 in a position near the said cover plate to facilitate the loading of said magazine with retainer strips. A pair of oppositely disposed sprin blades 60 tend to force the plate 57 an consequently the stack of retainer strips downwardly in the magazine as shown in Fi s. 3 and 6.

In Fig. 6, t e guide portion 21 of the pilot 20 may be made up of two

separate pieces

21 and 21, held to ther by means of a series of screws 21". e main object of this method of construction is to eliminate the necessity of discarding the entire piece if for any reason the guide member 21 or its associated parts are damaged during the use of the device. 7 Due to abnormal strains these parts may be damaged and if so, the construction illustrated in Fig. 6 will permit replacing the portion21 thus making the entire device again usable.

The stationary element. associated with the heretofore described elements will not be described.

By referring to the Figs. 1, 4, 5, 6, 7

\ and 8, the numeral 75 designates the relativel stationary element. of the device, whic will be termed the housing. This housing consists of two

side walls

76 and 77, and upper and

lower plates

78 and 79 respectively. The plate 78, securing the two side Walls together at their upper edges, is cut away to permit the removal of the retainer strip magazine 36 without disassembling any portion of the device. The plate 78 engages with the upper surface of the body portion 34 thus forming a bearing for this body portion. A channel 78 is formed in theunder surface of plate 78 in order to provide a clearance over the cover plate of the magazine 36 when the device is in operation.

In order to provide an upper bearing at the forward extremity of the

side walls

76 and 77, a plate 82 is provided, said plate being secured to the edges of both or formed integral with one and secured to the other upper edge .of either of the said

side walls

76 and 77. This plate 82 is channelled as at 83 to fit the contour of the guide. portion 21, ofthe pilot'20. l

I As has been mentioned heretofore, ,the' housing 5 is provided witha'bottom or lower late 79 secured to the lower edges of the si e

walls

76 and 77, said lower plate being of such length, that its forward edge 80 comes into close proximity to the inclined side of the rectangular portion 44 of detent 42, when the movable element of the device is shifted to the extreme right hand portion relative to the housing as is shown in Fig. 7. A longitudinal channel 81 is formed in the inner surface of the plate 79 and extends from the forward edge of said plate 79 rearwardly to a line 81 where the channel is narrowed and thence 'rearwardly to a line 81 which is slightly beyond the point where the detent 42 is located relative to the housing 75 when the different parts of the device are in the posinel beingsubstantially equal to the thichness of a retainer strip 54. From line 81 to line 81*, the channel 81 is less' in width than retainer strip 54, but greater in width than detent- 42 (Fig. 14) to permit the detent to drop into the channel at a point in back of the retainer strip.

By forming the channel 81 wider than the web 23, a relatively wide retainer strip may be employed which may be wedged tightly into the armature slot in the space provided by the progressive wedging of the windings away from the under cutshoulders at the neck of the slot.

Both

side walls

76 and 77 are provided with ears 82 oppositely disposed. These ears are so positioned that a screw 83 passing through both, is adapted to pass through the slot 47 also. This screw is held in position in the ears by means of a nut 84, said screw acting as anchorage for one end of the spring 49, the other end of which is anchored to a pin 48. carried by the body 34.

Having described the construction of the device and its component parts, the mode of operation of the same will now be set forth. I The retainer strip magazine 36 is first filled, after removing same fro-m the chamber 35 in body portion 34. The magazine can be removed by depressing the latch members 38. As the springs 60 normally tend to push the plate 57 out of the receptacle 53, the said platemay be drawn into the said receptacle by means of the rod 55 to provide space for the stack of retainer strips to be inserted. In order to facilitate this-loading or inserting of the retainer strip pack, a

55 will be held .in this loading position, thereby preventing the springs 60 from forc- ;ing the stack of retainer strips out cf the receptacle 53 during the loading operation. After loading, the; magazine 36 is placed within the, chamber 35 in which position the latches 38 will firmly hold it. Then the catch 59 is withdrawn from engagement with the slot 58, permitting the springs 60 to push the plate 57 against the stack of retainer strips and the lower strip against the inner surface of the lower plate 7 9 of housing 75.

An armature core non-conducting wrapping 94 which usually covers its periphery and lines the armature slots. l/Vindings 95 are located in the slots in any suitable manner.

The operator now inserts'the nose of the pilot 20 in one of the arn'iature slots, so that the flange portion 23 thereof'enters the wire retaining portion 91 of the slot and the web portion 22 enters the restricted neck portion 92 see Fig. 9. Longitudinal pressure is now exerted by the operator, on the handle 52, causing the pilot 20 to further enter the slot, thereby forcing the knife element 25 carried by said pilot, within the space between the lining material 94 and the periphery of the core.

Further movement of the pilot in the slot will now cause the an ular cutting surfaces 26 of the knife 25 to force the lining material inwardly toward their respective sides of the web portion 22, cutting said lining material at the peripheral edges of the restricted neck 92 of the slot and progressively compacting the winding throughout the length of the slot to provide a space for the leading end of the retainer strip. Thepres sure. of the web of the pilot against the paper holds-the latter stationary during the cutting operation. This web also acts as a guide for the cutting and wedging' tools. As shown in Fig. 9, the transverse thickness of the web portion 22 is of such a dimension as to permit it to pass readily between the layers of lining material at the sides of said neck 92. The web portion 22 at the inclined surface 33, is thicker transversely than the web portion 22 conjoining the erpendicular surface 32, so that when sai inclined surface 33 is moved inwardly into the slot, it will engage with the sheared off edges of the lining material in the neck 92, turning them down in such a manner that the following flange 23 will fold said edges down against the windings in the slot as is clearly shown in Fig. 10. By referring also to Fig'."12, the positions of the various elements of the device relative to the armature,

at this stage of the assembly operation, are

shown. The lower edge 80 of the housing 75 engages the side wall of the armature to,

cause a relative movement between the housing and the member 21 and feed a retaining 1 strip into the space provided by the wedging member.

As the pilot 20 is moved still further into the armature slot, the flange 23 will form a pathway between the lining material and 90 is provided with a the restricted neck portion 92 of said slot, into which the retainer strip 54 will be inserted. This strip 54 is held in this position by having its forward end, which, as can be seen in Flg. 2 is pointed, fit in a corres ondingly shaped cut awa portion in the ange 23, while its rear en is engaged by the detent 42 and by the edge of channel 81 at line 81. The manner in which this retainer strip 54 is held in position relative to the web portion 22", substantially causes it to form a continuance of the flange portion 23, thereby tending to cause said strip to follow the flange portion 23 into the space in the armature slot above the cut edge portions of the lining 94 as shown in Fig. 11.

In order that this device may be used for completing the assembly of a series of armature slots without the necessity of manually loading or placing a retainer strip in position preliminary to each operation, there is provided a magazine 36, which as has been set forth in some of the preceding paragraphs, is adapted to carry a supply of retainer strips for a series of operations.- It has also been mentioned and is clearly shown in Fig. 6 that the bottom strip in the stack included in. the magazine rests upon the inner surface of the lower plate 79 of the housing 75 due to the pressure of the springs 60 on the plate 57 resting on the top of the stack of retainer strips.

Now in order to replace the retainerstrip 54, held in position in the receptacle in pilot 20, with a strip from the magazine after the first one has been inserted in the armature slot, the housing 75 is provided with an edge or surface 80, which, as is shown in Figs. 12 and 13 is adapted to engage with the edge of the core of the armature thereby causin relative movement between the pilot an body portion 20, and the housing portion 75 of the device. This relative movement between these elements will cause the lowest retainer strip in the pack included in the magazine to slide along the lower plate 79 until the limit of travel is reached as shown in Figs. 7 and 13, when said lowest retainer strip will be forced down into the channel 81 formed in the forward portion of lower plate 79.

When the position of the assembling device relative to the armature is as shown in Fig. 13, the operation of forcing down the windings into the core, of cutting and foldin the core lining, and of insertin the retainer strip will have been complete Now if the tool be moved u wardly in the direction 'of arrow 120 in ig. 13, the retainer strip will remain in the armature core. The

edge 80 being free of the armature core, the spring 49 Wlll be released from distended position and will cause the parts of the assembling tool to return to normal position, shown in Figs. 1, 4, 5 and 6. This return ber 21 nan-2,2

of these elements to normal position will cause a reverse relative movement betweensaid elements from that described thereby causing the detent 42 to ride or slide over the upper surface of the strip 54 in the channel 81. Due to the fact that one end of said strip 54 abuts against the edge 81" of the channel 81, said strip 54 cannot move backwardly out of the channel 81, but the detent 42 may slide over strip 54- since detent 42 is provided with an inclined face 45 on its rearward side which causes detent 42 to be forced up into'the recess 41 against the pressure f spring 41".

From the aforegoing description it can be seen that each cycle of operations will tend tojinsert a retainer stri into the armature slot, while at the same time another retainer strip will be automatically removed from the stack in the magazine and placed in posltion to be inserted in the next adjacent armature slot during the following cycle of operation.

As has been described, the operation of the device is brought about by the operator exerting longitudinal pressure on the handle 52. However, in the Figs. 12 and 13 there is shown mechanical means for transmitting power to cause the pilot 20 to enter and pass through the armature slot. This mechanical means includes cylinder 100, utilizing any suitable means of power to actuate a piston (not shown) which is connected with a rod 101. This rod is provided at its outer end with a fulcrum pin 102 to which is anchored a'hook element 103 adapted to engage the pin 29 secured to the pilot member 20. A spring 104 carried by the rod 101 is adapted to hold the hook element 103 in engagement with the pin 29. Any suitable control may be utilized to direct pressure on the piston (not shown) in cylinder, whereby the rod 101 may be moved backwardly and forwardly to. eifect'the operation of the assembling device. Obviously the hinged hook 103 may be swung away from the pin 29 to release the tool.

The armature may be rigidly held in posi' tion by means of any suitable device correctly located relative to the power cylinder.

In the modified form shown in Figs. 15 and 16, the stationary member corresponding to member 75 of the first form is provided with a hollow handle 130 into which slides a hollow extension 131 of the member 21 corresponding to member 21 of the first form. Spring 85* is attached by pin 83 to handle 130 and by pin 48 to mem- For convenience in manufacture the part 135 carrying

members

38, 39 and 40 is not constructed integrally with member 21 but is formed as a separate part and secured to member 21 by screws 136.

The compacting of the windings in the slots is effected more uniformly and in a formed in a small fraction of the time required heretofore in fact it has been found that when a strip is in operative position on the tool the wedging, cutting and strip plac ing operations may be performed on the smaller armatures such as are employed in gas engine starting and lighting systems in less than a second.

\Vhile the forms of mechanisms herein shown and described constitute preferred forms of embodiments of the invention, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

\Vhat we claim is:

1. The method of inserting a retaining strip in each of a series of longitudinal slots in an armature core, which includes rotating the core to bring a slot to a predetermined position; moving a wire compacting tool longitudinally through a slot in said position to compress wires in the slot, removing the tool from the opposite end of the slot; and placing a retaining strip in each of the slots while the wires are in compact relation.

2. The method of inserting a retaining strip in each of a series of longitudinal slots in an armature core, which includes intermittently rotating the core to bring the slots successively to a predetermined position; insorting a wedging tool at one end of a slot in said position; moving the tool through the slot by power operated meansoperating from the. opposite end of the slot; and feeding a retaining strip intothe recess progressively with the movement of the wedging tool therein.

3. The method of completing an armature having an open slotted core, which includes lining the slots with insulating material, in applying windings, and compacting said windings in the slots concomitantly with the cutting off of the insulating material lining the slots.

4. The method of completing an armature having an open slotted core, which comprises lining the slots with insulating material, in applying windings, and compacting said windings in the slots concomitantly with the inserting of a retainer strip between the windings and the edges of the slots.

5. The method of completing an armature having an open slotted core, which comprises lining the slots with insulating material,

applyin windings, and shearing the lining materia? adjacent the openings in the slots,

concomitantly with the turning down of said :heared edges against the windings in said ots.

6. The method of completing an armature having an open slotted core which includes lining the slots with insulating material, applying windings, and shearin the lining material adjacent the edges of t e slots, concomitantly with the inserting of a retainer strip in said slots between the windings and the ed es of the slots.

7. T e method of completing an armature having an open slotted core which includes lining the slots with insulating material, applying windings, and forcing said windin 5 together in the slots concomitantly with t e shearing of the lining material at the edges of the slots, while at the same time turning said sheared edges down against the windings in the slots.

8. The method of completing'an armature having an open slotted core which includes lining the slots with insulating material, applying windings, and forcing said windings together in the slots concomitantly with the shearing of the lining material at the edges of the slots, while at the same time inserting retainer stri s into the slots between the windings an the edges of the slots.

- 9. The method of completing an armature having an open slotted core which includes lining the slots with insulating material, ap plying windings, while concomitantly compacting'said windings in the slots, shearing the lining material at the edges of the slots,

turning said sheared edges of the lining material down against the windings and inserting a retainer strip into the slots between the windings, and the edges of said slots.

10. The method of completing an armature having an open slotted core which includes lining the slots wit-h insulating material, applying windings while concomitantly shearing the lining material at the edges of the slots, and turning said sheared edges of the lining material down against the windings, and inserting a retainer strip into the slots between the windings and the edges of said slots.

11. The method f completing an armature having an open slotted core which includeslining the slots with insulating material, applying windings, and turning the edges of the lining material down against the windings concomitantly with the inserting of a retainer strip into the slots between the turned down ed s of the lining material and the edges of t e slots.

' 12. In an apparatus for compacting a plurality of flexible members in an armature recess formed in part by an undercut shoulder, the combination of a wedging member adapted to hear at its op osite sides against the undercut shoulder and the flexible members; and means for feeding the wedging member into the recess.

13. An apparatus of the class described comprising means for compacting a plurality of wires in an armature recess; and means movable therewith for inserting the leading end of a retaining member into the recess over the compacted wires.

14. An apparatus for securing a plurality of flexible members in a bottle shaped armature recess and comprising means movable longitudinally through the recess for ressing the wires away from the neck of t e recess; and means for feeding a retaining member into the recess progressively with the pressing of the wires.

15. In a tool the combination of a member adapted to be moved longitudinally in a recess in an armature and to be guided by the walls thereof; and a cutting tool guided by said member for cutting insulating material adjacent the opening into the armature recess.

16. An apparatus for securing wires in an armature slot and comprising means for inserting a retaining strip in an armature slot; and means for supplying retaining strips to said first named means.

17. An apparatus comprising mechanism movable longitudinally in an armature slot to compress wires therein to form a space for receiving a retaining member; means for inserting a retaining member in said space; and means for supplyin the retaining members to said last named means.

18. An apparatus comprising means for progressively cutting insulating material adjacent the month of an armature slot; and means for progressively pressing the severed end portions of the said material onto a plurality of wiresin the slot.

19. In a device for assembling armatures having an open slotted core lined with insulating material and supporting windings, the combination with a guide element to be inserted in the slots and adapted to compact the windings in the slots; of means guided by said guide element for shearing the lining material adjacent the openings in said slots.

20. In a device for assembling armatures having an open slot-ted core lined with insulating material and supporting windin the combination with a guide element toil inserted in the slots and adapted to compact the windings in the slots; of means guided by said guide element for inserting .a retainer stri in the slots between the windings and t e edges of said slots.

21. In a device for assembling armatures i 22. In acde'vice for assembling armatures having anopen slotted core lined with insul'ating material and supporting windings,

of means guided by ide element for cutting the lining also guided by the ing aretainer strip etween the turned down edges of the sheared lining material and the edges of the slots.

28. In adevice for assembling armatures having 'a' n 'open slotted'core lined with insulating material and supporting windings,

. the combination with a guide element to be inserted in the slots an thewindings against the bottom ortions of adapted to press the slots; of means guided by sai uide element for cuttin the lining material at the edges of said s ots; and means guided by said guide element for turning down the sheared edges of the lining material against the windings in the slots.

y 24:. In a device'for assembling armatures having an open slotted core lined with insulating material and supporting windings, the combination with a guide element to be inserted in the slots and adapted to force the windings against a slot wall, of means guided by said guide element for shearin the lining material at the edges of said slots; and means guided by said guide element for inserting a retainer stri. in the slots between the winding and t e edges of said slots.

25. In a device for assembling armatures having an open slotted 'core lined with insulating material and supporting windings, the combination with a guide element to be inserted in the slots and adapted to compactthe windings; of means uided by said guide element for shearin means guided by said guide element for turning down the sheared edges of the lining material against the windings in the slots; and means guided by said guide element for inserting a retainer strip in'the slots between the windings and the edges of said slots.

26. In a device for assembling armatures having an open s otted core lined with insulating material and supporting windin the combination with a guide element to ll inserted in the slots; of means for shearing the lining material atthe edges of said slots; means guided by the guide element for turning the sheared edges of the lining said guide element for turning guided t e lining .material adjacent the edges 0 said slots;

material down against the windings'in the slots; and means also guided by the guidmg. element for inserting a. retainer strip in the slots between the turned down edges of the lining material and the edges of the s ots'.

27. In a device for assembling armatures having an open slotted core lined with insulating material and supporting windings, the combination with a guide element to be inserted in the slots; of-means ided by dawn the sheared edges of thelining material against the windingsin'theslots; and means also by the guide element for inserting a retainer stripbetween the tumedidown edges of the shearedli g material and the edges of the slots.

28; In a devicei ]for assembling armatures' having cores provided with bottle shaped slots-comprising a large winding retaining portion and a restricted. neck portion, said core being wrapped with and said slots being lined with a strip of insulation material, the combinationwith a pilot having flange and web portions adapted to enter retaining neck portions of the slots res ectively; of a knife carried by the pilot and adapted to shear the lining material in the slots and so arranged as to be inserted beneath the lining material around the core previous to the insertion of the pilot member into the slots.

29. In a device for assembling armatures having bottle shaped slots with a. large winding retaining portion and a restricted neck portion lined with insulating material extending outside the slots; the combination with a pilot having flange and web portions, the flange being adapted to enter the large winding retaining portion of the slot to force the windings down into the slot, the web portion being adapted to enter the restricted neck portion of the slot to act as a guide and to force the lining material therein against the sides of the said re-' stricted neck portion; of a knife carried by the pilot and adapted to cam the lining material toward the web portion of the pilot and cut it off. i

30. In a device for assembling armatures having cores proided with bottle shaped slots comprising a large winding retaining portion and a restricted neck portion, said core being'wra'pped with and said slots being lined with a strip of insulating material; the combination with a pilot having flange and web portions adapted to enter the retaining and neck portions of the slots respectively, of a knife having an angular cutting port on. and a body portion and adapted to be inserted in a slot in the web tremity of said slot, while the body portion is rigidly held in position by means of a screw provided in the pilot, thereby tending to hold said knife in a correctl alined' position relative to the'pilot, for facilitating the shearing of the lining material.

31. In a device for assembling armatures havingcores provided with bottle shaped slots comprisinga large windingretainin portion and a restricted neck portion, sai

holding said windings in the slots.

32. In a device for assembling armatures having cores provided with bottle shaped slots comprising a large winding retaining portion and a restricted neck ortion, said core being wrapped with and sa1d slotsbeing lined with a strip of insulating material; of a pilot having flange and web portions adapted to enter the retaining and neck portions of the slots respectively; and a retainer stri receptacle formed in the pilot in direct a inement with the flange portion thereof, said receptacle being 'ada ted to contain a retainer strip slightly wi er than the saidflange portion, and capable of being inserted in the armature slots directly in the path-of the said flange portion of the pilot to hold the windings in position in the slots. v

33. In a device for assembling armatures having cores provided with bottle shaped slots lined with insulating material and containing windings; the combination with a pilot member including means for forcing the windings down into the slots, cutting means for shearing the lining material in the slots; means for folding said sheared paper down against the windings, and means or inserting a retainer strip in said slots; ,of a magazine formed in a continuation of the pilot member and adapted to contain a plurality of retainer strips; and means for shifting one of these retainer strips from the magazine and inserting said strip in the arma- .ture slots; indetermmed sequence of operation.

7 34. In a device for assembling armatures having cores provided with bottle shaped slots lined with insulating material and containing windings: the combination with a pilot member including means for forcing the wind ngs down into the slots, cutting means for shearin the lining material in' the slots; means or folding said sheared aper down against the windings, or inserting a retainer strip insaid slots;

adapted to hol or picking and means of a magazine formed in a continuation of plurality of retainer strips; a stationary ousing in which the pilot member is ada ted to move longitudinally; a resilient e ement connectin the housin and pilot and positionand means associated with the pilot up one of the retainer strips in the magazine and causing it to be laced in position in the rece tacle forme in the pilot for inserting t e strip in the armatureslots.

35. In a device for assembling armatures having cores lprovided with bottle shaped slots lined wit insulating material and containing windings; the combination with a pilot including shearing, paper turning and retainerstri inserting devices; a magazine capable of ing inserted and held in a pocket formed in an extension of the pilot, said magazine being adapted to carry a supply o'f retainer strips; a housing in which the pilot is adapted to move lon itudinally, said housing bean providedwit a hollow handle (portion, w 11s the op site end is provide with buffer edges a apted to engage with the edge of the commutator core when a retainer strip is being inserted; a receptable formed in the housin and into which a retainer strip is adapted to be inserted when the magazine and housin are in relatively abnormal position; a late element positioned in the pilot and adapted to slide over the retainer strip until the pilot and housing elements are in relativ'el normal position'when said latch drops bind the retainer strip to hold it in position in a receptacle formed in the pilot member; and a resilient element connected between the pilot and housing elements to bring these two elements into normal relative position when one slot of the armature is com letely assembled, and thereby adjust the device for the next assembly operation.

36. In a device for assembling armatures having open slotted cores containing windings, the combination with to insert a reta'i r stri a magazine retain stri a pilot adapted in the slots; of container assoeach in re atively normal ciated with said pilot an held in position therein by means of spring controlled latches, and adapted to automatically supply a retainer strip for each cycle of operation of the ilot.

37. In a evice for assembling armatures havin open slotted cores containing windings, t e combination with a pilot adapted to insert a retainer strip in the slots; of a magazine retainer container associated 'with the pilot, said magazine having resilient means for causing a retainer strip to be brought into position capable of being inserted in the armatuflakslot at each forward movementof the pilot.

38. In a device for assembling armatures having open slotted cores contaming windings, the combination with, a pilot adapted to insert a. retainer strip in the slots; of a magazine retainer strip container associated m the pilot and adapted to contain a plurality of retainer strips to be inserted in the armature slots; of a plate in said magazine adapted'to force the retainer strips in a downwardly direction through the influence of resilient elements when said magazine is in position in the pilot, and adjustable means for holdin said plate in position against the to o the magazine for overcoming the e ect of the resilient elements associated therewith, to facilitate the loadin of the magazine with retainer strips.

11 testimony whereof we hereto aifix our signatures.

GEORGE H. LELAND. ROBT. H. AHLERS.