US2969888A

US2969888A - Winding machine

Info

Publication number: US2969888A
Application number: US693747A
Authority: US
Inventors: Theodore A Whiting
Original assignee: Leesona Corp
Current assignee: Leesona Corp
Priority date: 1957-10-31
Filing date: 1957-10-31
Publication date: 1961-01-31
Anticipated expiration: 1978-01-31

Description

Jan. 31, 1961 T. A. WHITING 2,969,888

WINDING MACHINE Filed Oct. :51, 1957 10 Sheets-Sheet 1 INVENTOR. THEODORE A. WHITING ATTORNEY T. A. WHITING WINDING MACHINE Jan. 31, 1961 10 Sheets-Sheet 2 Filed Oct. 31, 1957 INVEN TOR. THEODORE A. WHITING ATTORNEY Jan. 31, 1961 T. A. WHlTlNG 2,969,888

WINDING MACHINE N [N VEN TOR. THEODORE A. WRITING ATTORNEY T. A. WHITING WINDING, MACHINE Jan. 31, 196E l0 Sheets-Sheet 4 Filed 001;. 31, 1957 ATTORNEY T. A. WHITING WINDING MACHINE Jan. 31, 1961 10 Sheets-Sheet 5 Filed Oct. 51, 1957 INVEN TOR. THEODORE A. WHITING ATTORNEY Jan. 31, 1961 T. A. WHlTlNG 2,969,888

WINDING MACHINE I Filed Oct. 51, 1957 10 Sheets-Sheet 6 IN VEN TOR. THEODORE A. WHITING ATTORNEY T. A. WHITING WINDING MACHINE Jan. 31, 1961 10 Sheets-Sheet 7 Filed Oct. 31, 1957 THEODORE A. WRITING nronuzv v T. A. WHlTlNG WINDING MACHINE Jan. 31, 1961 10 sheets-sheet 8 Filed Oct. 31, 1957 INVENTOR. THEODORE A. WHITING ATTORNEY Jan. 31, 1961 T. A. WHlTlNG WINDING MACHINE 10 Sheets-Sheet 9 Filed Oct. 31, 1957 INVENTOR. THEODORE A. WHITING ATTORNEY T- A. WHITING WINDING MACHINE Jan. 31, 1961 10 Sheets-Sheet 10 Filed Oct. 31, 1957 INVEN TOR. THEODORE A. WHITING ATTORNEY United States Fatent C WINDmG MACHINE Theodore A. Whiting, Warren, R.I., assignor to Leesona Corporation, a corporation of Massachusetts Filed Oct. 31, 1957, Ser. No. 693,747

8 Claims. (Cl. 216-33) The present invention relates to a machine for winding electrical coils and more particularly relates to a machine for winding such coils from a ribbon of thin sheet-like conductive material.

It has been suggested that electrical coils for certain uses as, for example magnet coils, be wound from ribbons of thin sheet-like conductive material as, for example, aluminum foil, having a thickness in the order of from .0002 to .004 inch. Such coils are more desirable than coils wound from wire in many applications because they are easy to connect electrically, are more compact and are less expensive than wire coils.

Winding such coils from ribbons of thin sheet-like conductive material, hereinafter sometimes called foil coils, has heretofore presented certain problems and has required a large amount of skilled hand labor due to the fact that it is necessary to secure the end of the conductive ribbon to an electrically conductive core member at the start of the winding cycle, insulate the layers of ribbon from each other, tape the finished coil to prevent it from unwinding and insulate the free end of the ribbon.

One object of the present invention is to provide a machine for winding a coil from a ribbon of thin conductive material and insulating the layers of such coil from each other.

. Another object of the present invention is to provide a machine for winding foil coils having means for taping a finished coil to prevent it from unwinding.

Another object of the present invention is to provide a machine for winding foil coils having means for insulating the free end of foil.

Another object of the present invention is to provide a machine for winding foil coils having means for taping a finished coil and insulating the free end of foil.

Another object of the present invention is to provide a machine for winding foil coils, insulating the layers of foil in such coil from each other and having means for cutting said foil and the insulating material at the completion of the winding cycle.

Another object of the present invention is to provide a machine for winding foil coils and having means for applying two lengths of adhesive tape to a wound coil to prevent it from unwinding and to insulate the free end of foil.

Another object of the present invention is to provide a machine for winding foil coils, applying two lengths of adhesive tape to a wound coil to prevent it from unwinding and to insulate the free end thereof and having means for cutting one length of said adhesive tape.

Another object of the present invention is to provide a machine for winding foil coils quickly and inexpensively and with a minimum of skilled hand labor.

Other objects of the invention will in part be obvious and will in part appear hereinafter.

The invention accordingly comprises the apparatus possessing the construction combination of elements ice following detailed disclosure, and the scope of the application of which will be indicated in the claims.

For a fuller understanding of the nature and objects of the invention, reference should be had to the following detailed description taken in connection with the accompanying drawings wherein:

Figure 1 is a front elevation of a winding machine embodying the present invention and showing the movable carriage thereof located at its uppermost position{ Fig. 2 is a side elevation of the Winding machine of Fig. 1;

Fig. 3 is a detail view showing the two cams formed in the end plates and the positions of the cam followers during different stages of the winding and taping cycle;

Fig. 4 is a sectional view taken on the line IV-IV of Fig. 1 and looking in the direction of the arrows but showing the movable carriage located in the position it assumes at the start of a winding cycle;

Figs. 5, 6, 7, 8 and 9 are sectional views similar to Fig. 4 but showing the movable carriage in difierent positions it assumes during the winding and taping cycle;

Fig. 10 is an enlarged fragmentary view showing the no-back brake employed to prevent reverse movement of the foil and insulating material;

Fig. 11 is an enlarged fragmentary view showing the upper and lower suction tube support plates;

Fig. 12 is an enlarged side elevation of a foil coil manufactured on the machine of the present invention; and

Fig. 13 is an enlarged cross sectional view of the coil of Fig. 12.

The foil coil wound by the machine comprising the present invention does not comprise part of the present and arrangement of parts which are exemplified in the Y invention but is illustrated in Figs. 12 and 13 so that the operation of the winding machine can be better understood. The coil 1 includes a tubular core member C formed from conducting material as, for example, aluminum. A ribbon of thin sheet-like conducting material F, preferably aluminum foil which may have a thickness from .0002 to .004 of an inch is secured at one of its ends to the periphery of core C. A ribbon of sheet-like insulating material I, preferably having a thickness in the range of .00025 to .004 inch, is positioned on top of foil F and its end also secured to the core C. Insulating ribbon I preferably is a polyethylene terephthalate but also may be formed from craft paper or any other convenient thin insulating material. The superimposed ribbons of foil and insulation are wound on core C until the desired number of turns have been placed thereon whereupon the ribbon of insulation is cut. An insulating tape T1, having a pressure sensitive adhesive on one surface thereof is stuck to the periphery of the wound coil and is wrapped at least approximately 270 therearound and then extends over the free end of the foil F to insulate one surface thereof. A second piece of insulating tape T2 is stuck to the periphery of the coil and the outer surface of tape T1 and is wrapped around substantially of the periphery of the coil in the opposite direction from that taken by tape T1 to complete the insulation of the outer surface of the coil. Tape T2, when it meets the end of foil F is stuck to the surface thereof opposite tape T1 to thereby complete the insulation of said foil end which projects from the body of the coil and acts as a lead for connecting said coil in a circuit.

The coil winding machine of the present invention comprises means for rotating a tubular core member to wind a foil ribbon and a superimposed ribbon of insu lating material thereon. A movable carriage is provided to bring the foil and insulating ribbonstogether from sources of supply and to place them in superimposed relation and to guide them onto the rotating tubular core member. The movable carriage member carries two supplies of insulating tape having a pressure sensitive adhesive on one surface thereof and the carriage is provided with means for bringing the pressure sensitive coatings on the insulating tapes into contact witha wound coil to facilitate taping the periphery thereof and insulating the free end which extends therefrom as a lead. Cammeans are provided which cooperate with the movable carriage for moving the adhesive surface-of the insulating tapes into contact with the periphery of the wound coil and for cutting the foil, the superimposed insulation and one adhesive insulating tape at various Qpredetermined positions in the movement of the carriage.

Referring now to the drawing, the coil winding machine embodying the present invention is supported on a bed or table supported by

pedestals

12 and 14. A *windinghead '16 contains a spindle '17 suitably journaled and driven by a variable speed motor, not shown, mounted in head end pedestal 12. This motor is controlled by foot treadle 18 to obtainany desired starting and winding speed. A tailstock 20 is adjustable mounted on bed 10 and has a suitably journaled spindle 22 for mounting winding arbor 26 "between said spindles for rotation Ithereby. Spindle 17 is provided with hand wheel 23 for rotating said spindle manuallyif it is so desired.

Means are provided between, and to the rear of, spindles 17 and 22 for guiding a strip of foil and a strip of sheet insulation to winding arbor 26 to wind a coil on core C carried thereby and 'for applying strips of pressure sensitive adhesive tape to wound coils, in a mancarriage is pivoted.

Carriage 32 is a rigid frame comprising the generally triangular shaped

side plates

42 and 44 which are fixed at their apex 46 to shaft 48 adjacent the inner surfaces of end plates 28 and respectively. Shaft 48 is rotatably journaed in

end plates

28 and 30 adjacent bed 10 and approximately midway between their front and rear "edges.

spaced traverse rods or bars 50, 52'and 54 adjacent their upper edges and to spaced

traverse rods

56, 58 and 60

Side plates

42 and 44 are fixedly connected to located beneath

rods

50, 52 and 54 respectively to provide a rigid frame capable of pivoting about shaft 48.

Carriage operating lever 62 is secured to the upper portion of side plate 44 by means of studs 64 and 66 and projects above said side plate'and end plate 30. A latch 68 is pivotally mounted on stud 64 for selective latch ng engagement under the influence of spring 70, in notches "72, 74 formed in quadrant 76 which is secured to the outer surface of end plate 30 and which projects thereabove. Notches 72 and 74 are so located on quadrant 76 that carriage 32 can be heldin the correct position for winding coils and for dofiing wound coils and threading the machine preparatory to starting a new winding cycle.

The machine of the present invention is adapted to simultaneously wind a plurality'of coils along arbor 26. However, inasmuch as the mechanisms involved in carriage 32 for each winding position are identical, only one such mechanism will be described in detail herein.

Rods

56, 58 and 60 in addition to forming part "of carriage 32 also support and guide a'ribbon of .metallic "foil F, or the like, and

rods

50, 52 and 54'support and guide a ribbon of sheet insulating material 1. Rolls of "foil 78 and insulating material 80 are supported atthe rear of the winding machine in any convenient manner. -Spaced plates '86 and 88 are adjustablymounted on

rods

50,52 and.54 to ,prevent lateral movement ofthe ribbon :ated by the pivotal .movement of said carriage. taping means includes support members for holding two a I of insulating material, and guide

plates

90 and 92 are adjustably mounted on

rods

56, 58 and 60 beneath 86 and 88 to prevent lateral movement of foil ribbon F. A brake 94 is eccentrically mounted for rotation about stud 96 fixed to guide plate 90 and is so positioned that it will bear on rod 58. A similar brake 98 is eccentrically mounted on guide plate 86 to bear on rod 52.

Brakes

94 and 98 are preferably formed from a material having a high coefficient of friction as, for example, rubber and function as 'no-back brakes to permit foil ribbon F and insulation ribbon I to be drawn from

rolls

78 and 80 towards the coil winding on arbor 26 but to prevent any reverse movement thereof.

The apparatus described thus far can be utilized to wind coils of foil ribbon but is not capable of finishing those coils when wound by taping and functions in the following manner. Carriage 32 is pivoted forwardly until latch 68 engages in notch 72, the position illustrated in Fig. 5. .The foil ribbon .F is drawn from .theroll 78, :over .

rods

60, 58 and 56 and under no-back brake 94 and is secured to electrically conductive core C carried on arbor 26. The insulation ribbon I .is drawn from roll 80, over

rods

54, 52 and and under .no-back brake 93 and is also secured to .core C. Inasmuch as insulation ribbon I is over foil ribbon F-said ribbon .F

a coil thereon while

guide plates

90, 92, 86 and 88 and

forward rods

56 and 50 direct foil F and insulation I thereto. Once the coil is completed it must be taped to prevent it from unwinding and the end of foil ribbon 'F extending therefrom must be insulated. This, of course, can be donemanually, but such operations are slow and "costly. The mechanism hereinafter described performs those operations rapidly and economically as a function of the apparatus.

Means for applying tape to the periphery of foil coil 1 and its lead are carried by carriage 32 and are actu- The supplies of tape having a pressure sensitive adhesive on one face thereof on oppositesides .ofthe ribbon of foil F as it extends from its supply to the coil 1. The means also includes holding members associated with the sup plies of adhesive tape for holding the free ends thereof while the coil -1 is being wound and for moving those ends into contact with the periphery of the coil after it has been wound to commence the taping operation 'and to guide the adhesive tape onto the periphery of *the coil and along the lead extending therefrom.

'Both the tapes Ti and T2 preferably comprise polyethylene terephthalate, but can be of any convenient'im sulatrng material, having a coating of any convenient pressure sensitive adhesive as, for example, :such as is 106 to'th-ereby mount said plates on said tube. The ends of tube 106 are fixedly secured to one end of links 108 which are pivotally journaled at their opposite end on rod 56. Atubular member 100 is secured betweenplates 103 at the forward corner thereof. A plurality of perforations 201 pass through the wall of tube 100 adjacent the mid-point and on the lower side-thereof. The interior of tube 106 is connected to theinterior oftubular mem her 100 by means of two flexible tubes 206 the ends of whichfit over nipples 20S and 207 which pass through the walls of tubular member 100 and tube 106 respectively. It will be understood that the ends of tubular member 100 are closed by any suitable means as for example by means of the bolts 101 employed to secure said tubular member to the plates 103. The ends of tube 106 are closed by means of bolts 111 threaded into the ends of said tube and which have studs 113 extending axially therefrom over the uppermost surface of

end plates

28 and 30 and cam surfaces 34 formed thereon. Inasmuch as tubes 206 are flexible plates 103 and tubular member 100 can pivot on tube 106 to a limited extent permitted by the bending of said tubes 206. To limit the counterclockwise pivoting movement of said plates 103 and tubular member 100, as viewed in Figs. 2-9, a plate 124 having a laterally extending car 123 formed thereon is fixed to the front of tube 106 adjacent one side plate 103 by means of the collars 120 and screws 121 with said ear extending under plate 103 in supporting relation thereto. Inasmuch as studs 113 contact cam surface 34 it will be seen that as carriage 32 is pivoted forwardly and rearwardly tube 106 will be raised and lowered in accordance with the configuration of said cam 34 causing plates 103, roll of adhesive tape 180 and tubular member 100 to pivot around rod 56 on link 108. As carriage 32 is pivoted forwardly as viewed in Fig. 1 or counterclockwise, as viewed in Figs. 2 through 9, studs 113 will ride down the forwardly inclined portion 37 of cam surface 34 until they reach the lowermost point thereon, 113c in Fig. 3, after which continued forward movement of carriage 32 will cause them to be lifted by the upwardly inclined portion 35 of said cam 34 until they assume the position 113b in Fig. 3. When studs 113 are in position 113b, tubular member 100 is above and in front of the coil winding on arbor 26, see Fig. 5. After a coil has been wound on arbor 26 carriage 32 is pivoted rearwardly causing studs 113 to move down cam surface 35 to position 113a causing tubular member 100 to be lowered into contact with the periphery of a coil wound on arbor 26, see Fig. 6. Continued rearward movement of carriage 32 causes tubular member 100 to move along the length of foil extending from the wound coil whereby it and the holding means for tape T2 are supported thereby, in a manner to be explained more in detail hereinafter, until such time as studs 113 once again engage the surface of cam 34.

Tube 106 is connected to a vacuum pump, not shown, by means of flexible tube 204 so that a partial vacuum can be maintained inside said tube 106 and tubular member 100. The end of tape from roll 180 is threaded under guide bar 136 and beneath tubular member 100 so that the back or non-adhesive surface of said tape is in contact with the perforations 201 in said tubular member to permit the vacuum maintained in said member100 to hold the end of tape T1 against the periphery of said member 100.

' A second supply of adhesive tape T2, similar to tape T1, in the form of roll 148 is rotatably mounted between a pair of generally triangular shaped side plates 128 having their upper most apexes pivotally journaled o-n rod 56 to permit swinging movement of said plates and said supply 148 of tape. Plates 128 are spaced a predetermined distance apart by combined spacer and guide bar 149 and shaft 166 which is removably secured to and extends between the lowermost apexes of said plates 128. The roll of tape 148 is held in alignment with coil core C, insulation 1 and foil F by means of collar 160 which is adjustably secured on shaft 166 and against which one side of the core 150 of roll 148 is pressed by helical spring 158 which is compressed between said core and a second adjustable collar 162. In addition to accurately locating roll 148 on shaft 166 collar 160 and spring 158 comprise means for applying a predetermined tension to the tape T2 as it is drawn from said ro-ll. Obviously, the resistance of roll 148 to unwinding can be increased or decreased by moving collar 162 toward or away from collar 160. A similar arrangement (not shown) is employed on shaft 152 to accurately locate roll 180 of tape T1 and to impart a predetermined tension thereto. Tube 126, carrying spacing collars 125, is fixed across the third or intermediate apex of plates 128 and is provided with a plurality of perforations 176, similar to the perforations 201 in tubular member 100, in the uppermost portion of its wall and intermediate said plates 128. The ends of tube 126 are plugged by bolts 139 threaded into the ends of said tube and which have studs 140 which extend outwardly therefrom and received in the cam grooves 38 and 40 formed in the inner surfaces of

end plates

28 and 30 respectively. Cam grooves 38 and 40 are identical except for being opposite in hand and are eight-sided closed grooves or tracks in which the studs 140 travel in a generally clockwise direction, as viewed in Fig. 3, as carriage 32 is pivoted forwardly and rearwardly.

The end of tape T2 is drawn from roll 148, passed under guide bar 149 and around tube 126 and passed over the perforations 176. The interior of tube 126 is connected to a vacuum pump, not shown, by means of flexible tube 167 to thereby maintain a partial vacuum inside of tube 126. The vacuum maintained inside tube 126 creates a suction in perforations 176 that holds the end of tape T2 on the periphery of said tube.

At the start of a winding cycle carriage 32 is moved to the rear until such time as latch 68 engages rearmost notch 74 and when in this position the

cam following studs

113 and 140 will occupy the positions with respect to their respective cams as is disclosed at 113a and 140a in Fig. 3 and the apparatus as a whole will as sume the position illustrated in Fig. 4. When said cam following studs are in this position arbor 26 carrying a coil core C is positioned between the

spindles

17 and 22 preparatory to starting a winding cycle. Latch 68 is released and carriagev 32 is pivoted rearwardly to move follower 140 rearwardly along the lengths 33 of earns 38 and 40, until said followers 140 drop down the length 31. The rearward wall of vertical length 31 serves as a stop preventing further rearward movement of carriage 32. At this point carriage 32 is pivoted forwardly causing follower 140 to move forwardly along the substantially horizontal length 27 and downwardly in length 21 and follower 113 to move forwardly along the surface of cam 34. Carriage 32 reaches the end of its forward movement when followers 140 arrive at the junction of lengths 21 and 15. When this point is reached carriage 32 is pivoted rearwardly until latch 68 engages in forward notch 72 in quadrant 76. This slight rearward movement of carriage 32 causes followers 140 to move forwardly and upwardly a slight distance in the cam length 15 to the position designated 1411b in Fig. 3 and illustrated as a whole in Fig. 5. When cam follower 140 occupies the position 14Gb cam follower 113, which controls the tubular member 100, has moved to the position 11311. When the two cam followers are in these last mentioned positions tube 126 and tubular member are spaced apart approximately their maximum distance and inasmuch as said tube 126 and tubular member 100 carry the ends of tapes T1 and T2 said tapes are spaced approximately their maximum distance apart. When carriage 32 is in this position the end of foil F is secured to coil core C and the end of insulation I is also secured to said coil core. Treadle 18 is actuated to cause arbor 26 to rotate to wind a coil upon core C. When the coil has been wound carriage 32 is moved rearwardly to cause follower to move upwardly in cam track 15 and cam follower 113 to move rearwardly and downwardly upon the cam surface 35. During this latter rearward movement of carriage 32 insulation I is out either manually by the operator or by means to be explained more fully hereinafterwhich are actuated by such movement of said carriage. When cam follower 113 reaches the position 113c (see also Fig. 6) the adhesive surface of tape T1 is brought into contact with the periphery of the newly wound coil carried by arbor 26 and carriage 32 is held .ports tubular member menses in that position While said arbor and coil "are rotated at least approximately 270 by means of hand wheel 23 to Fig. 7) when tube 126 presses the adhesive surface of tape T2 into contact with the periphery of the wound coil and over the end of tape T1 which is adhered thereto. Continued rearward movement of carriage 32 causes tape T1 to be drawn along the uppermost surface of foil F as it extends between the wound coil and guide bar 56 and causes cam followers 140 to move upwardly in cam groove length 38 to position 140a (see also Fig. 8) to thereby lift tube 126 from the periphery of the coil to the underside of foil F to thereby draw tape T2 from the periphery of the coil to the underside of foil F to press said tape against said foil and to support tubular member 100. Continued rearward movement of carriage 32 causes cam followers 140 to move rearwardly along the cam grooves 38 until said followers reach the location 149a. During this latter movement tube 126 presses tape T2 against the under side of foil F and sup- 10'8 whereby the lead extending from the coil is insulated. At the end of this latter movement cam followers 113 contact cam surfaces 39 to lift tubular member 101i away from foil F and followers 14% enter cam groove 13 to lower tube 126 away from said foil. At this point tapes T1 and T2 and foil F are cut, either manually or in a manner to be explained hereinafter, carriage 32 is moved rearwardly until

followers

113 and 149 assume the positions 113a and 149a respectively', the position they were in at the start of the cycle, arbor 26 and the coil thereon are removed from the ap paratus and the above described cycle started again. It will be understood that once tape T2 has contacted the undersurface of foil F the coil is rotated substantially 90 to cause the length of tape extending from the periphery of the coil to the undersurface of the foil to be folded between said coil and the lead formed by the extending length of foil.

The means for cutting insulation I comprises a pair of resiliently

flexible blades

210 and 214 which are moved relative to each other and which cooperate with each other to shear said insulation at a predetermined time in the operating cycle. Blade 214 is formed by one end of the generally C-shaped member 225 which is fixedly secured to the tube 106 by screw 107 so that the end of blade 214 depends from the rear of said tube. Member 214 is preferably formed from a thin sheet of spring steel so that the ends thereof can flex slightly during the cutting operation. Blade 210 is fixedly secured to "the underside of rod 59, and depends therefrom. by means of knife bar 2&9 and screws 212. As hereinbefore explained, the vertical movement of tube 106 relative to carriage 32, and rod 59, is controlled by cam 34.

Blades

210 and 214 are of such length that the edge of one will engage the face of the other adjacent its edge and slide off said face to shear the ribbon of insulation I as carriage 32 is moved rearwardly from the position 1131; to the position 1130. It will be recalled that the insulation I passes over bar i) as it runs to the coil on arbor 26 and thus located between the two

blades

210 and 214.

The other end of G-shaped member 225 forms blade 218 which cooperates with blade 220 to shear the foil ribbon F as carriage 32 is pivoted rearwardly from position 13 to position 113a. Blade 220, preferably made from a thin sheet of spring steel is fixedly secured to shaft 222. Shaft 222 is rotatably journaled between the side plates 128 with the left hand end thereof,- as viewed in Fig. 1, extending beyond side plate 42 and adjacent to end plate 28. Finger 224 having the cam surface 223 formed on its upper edge is fixed to the left hand end of shaft 222. Cam surface 223 is adapted to en- 'g'a'ge pin 226 projecting from the inner surface'of end plate 28 as carriage 32 pivots re'a'rwardly to rotate shaft 222 in acloc kwise direction, as viewed in'Fig. 9. Clockwise rotation ofsh'aft 222 swings blade 220 upwardly against the side of blade 218 causing blade 218 to slide across the edge of blade 220 to shear foil ribbon F. It will be recalled that "fail ribbon F extends from bar 56 to the winding coil and therefore is positioned

b'etween blades

218 and 220. Helical spring 217, located upon shaft 222, adjacent side plate 128 has one 'ofits ends secured to said side plate and its other end secured clines downwardly and to the rear thereof. Bar 230 is secured at its ends to the upper ends of arms 232 and 234 which are pivotally journaled at their lower ends on tube 106. Helical springs 236 and 238 are carried by tube 1% adjacent arms 232 and 234 respectively and urge said arms in a clockwise direction as viewed in Fig. 2 to press knife 228 against the surface of guard 240. Guard 249, which functions to shield knife 228 to pre' vent the operator from accidental cuts and also protects said knife from damage, is mounted on, and is located between plates 103.

When carriage 32 is in position 113a bar 230 is manilal-ly depressed to press the point of knife 228 against the surface of tape T1 to pierce that tape. Once the point of knife 228 has penetrated tape T 1 a slight rotation of the wound coil by means of hand wheel 23 draws said tape past said knife and causes the tape to be severed.

After insulation I, foil F and tape T1 have been cut the operator cuts tape T2 by any convenient means as, for example, a knife or scissors. It will, however, be obvious to those skilled in the art that means can be provided to cut tape T2. For example, a knife or blades similar to those disclosed hereinabove can be located on carriage 32 to cut tape T2.

The machine of the present invention operates in the following manner. With carriage 32 in position 113a arbor 26 and core C are inserted between

spindles

17 and 22. Carriage 32 is then pivoted forward to position 113!) and foil F and insulation I are attached to core C and treadle 18 is depressed to rotate arbor 26 to wind a coil on core C. After the coil is wound carriage 32 is pivoted rearwardl-y until tubular member presses tape Tl into contact with the periphery of said coil position 1130 and 1400, Fig. 3 and Fig. 6). During this

latter movement blades

210 and 214 sever insulation I. Carriage 32 is held stationary in the position illustrated in Fig, 6 and arbor 26 is rotated at least about 270 to wind a partial turn of tape T1 around said coil. After this has been accomplished carriage 32 is pivoted rearwardly to position 113a. During this latter movement the carriage passes throughpositions 113 and 114d, e and which correspond to Figs. 7, 8 and 9' respectively. At position 1130., d, Fig. 7, tubular member 126 presses tape T2 against the periphery of the coil. As carriage 32 moves from this latter position to position 113 143i, tapes T1 and T2 are drawn along the foil lead extending from the coil, position 113e, 140e, Fig. 8, and as carriage 32 approaches position 113 140 Fig. 9,

blades

218 and 220 cut foil F. With carriage 32 at position 113, knife 228 is swung downwardly to pierce tape T1 and arbor 26 is rotated about 90 to draw tape T1 past knife 228 to sever said tape a short distance ahead of the end of coil F and to also fold the length of tape T2 extending from the periphery of the coil' to the-lead between said coil and lead. The operator then cuts tape T2 and swings carriage 32 rearwardly to the starting position 113a and removes arbor 26 and the completed coil.

Since certain changes may be made in the above apparatus without departing from the scope of the invention herein involved, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

What is claimed is:

l. A machine for winding electrical coils from ribbons of conductive material comprising a rotatable spindle for rotating a core member about its longitudinal axis to wind a coil thereon, a pair of spaced side plates adjacent said axis, a carriage pivotally mounted between said side plates for pivotal movement toward and away from said axis, means for holding a supply of conductive ribbon, guide means on said carriage for directing a ribbon of conductive material drawn from the supply thereof onto said core, means carried by said carriage for holding a supply of tape having an adhesive on one face thereof, suction means carried by said carriage and movable relative thereto for holding the end of said tape, said end holding means being adapted to hold the end of said tape with its surface parallel to the axis of said core and in radial alignment with a coil wound thereon, and means carried by one of said side plates and engaged by part of said carriage as it is pivoted for moving said suction means from a position to one side of said ribbon as it extends between said guide and said coil wound on said core to a position wherein it presses the adhesive side of said tape against the periphery of said coil for application to said periphery circumferentially thereof.

2. A machine for Winding electrical coils from ribbons of conductive material comprising a rotatable spindle for rotating a core member about its longitudinal axis to wind a coil thereon, a pair of spaced side plates adjacent said axis, a carriage pivotally mounted between said side plates for pivotal movement toward and away from said axis, means for holding a supply of conductive ribbon, guide means on said carriage for directing a ribbon of conductive material drawn from the supply thereof onto said core, means carried by said carriage for holding a supply of tape having an adhesive on one face thereof, suction means carried by said carriage and movable relative thereto for holding the end of said tape, said end holding means being adapted to hold the end of said tape with its surface parallel to the axis of said core and in radial alignment with a coil wound thereon, and means carried by one of said side plates and engaged by part of said carriage as it is pivoted for moving said suction means from a position to one side of said ribbon as it extends between said guide and said coil wound on said core first to a position wherein it presses the adhesive side of said tape against the periphery of said coil for application to said periphery circumferentially thereof and subsequently moves it adjacent and along said ribbon.

3. A machine for winding electrical coils from ribbons of conductive material comprising a rotatable spindle for rotatinf a core member about its longitudinal axis to wind a coil thereon, a pair of spaced side plates adjacent said axis, a carriage pivotally mounted between said side plates for pivotal movement toward and away from said axis, means for holding a supply of conductive ribbon, guide means on said carriage for directing a ribbon of conductive material drawn from the supply thereof onto said core, means carried by said carriage for holding a supply of tape having an adhesive on one face thereof, suction means carried by said carriage and movable relative thereto for holding the end of said tape, means carried by said carriage for holding a second supply of tape having an adhesive on one face thereof, suction means carried by said carriage and movable relative thereto for holding the end of said second tape, said end holding means being adapted to hold the ends of said tape with their surfaces parallel to the axis of said core and in radial alignment with a coil wound thereon and means carried by one of said side plates and engaged by part of said carriage as it is pivoted for moving said suction means from positions spaced from the opposite sides of said ribbon as it extends between said guide and said coil wound on said core to positions wherein they press the adhesive sides of said tapes against the periphery of said coil for application to said periphery circumferentially thereof.

4. A machine for winding electrical coils from ribbons of conductive material comprising a rotatable spindle for rotating a core member about its longitudinal axis to wind a coil thereon, a pair of spaced side plates adjacent said axis, a carriage pivotally mounted between said side plates for pivotal movement toward and away from said axis, means for holding a supply of conduc-. tive ribbon, guide means on said carriage for directing a ribbon of conductive material drawn from the supply thereof onto said core, means carried by said carriage for holding a supply of tape having an adhesive on one face thereof, suction means carried by said carriage and movable relative thereto for holding the end of said tape, means carried by said carriage for holding a second supply of tape having an adhesive on one face thereof, suction means carried by said carriage and movable relative thereto for holding the end of said second tape, said end holding means being adapted to hold the ends of said tape with their surfaces parallel to the axis of said core and in radial alignment with a coil wound thereon, and means carried by one of said side plates and engaged by part of said carriage as it is pivoted for moving said suction means from positions spaced from the opp0- site sides of said ribbon as it extends between said guide and said coil wound on said core first to positions wherein they press the adhesive sides of said tapes against the periphery of said coil for application to said periphery circumferentially thereof and subsequently moves them adjacent and along opposite sides of said ribbon.

5. A machine for winding electrical coils as set forth in claim 1 wherein said means carried by said side plate is a cam.

6. A machine for winding electrical coils as set forth in claim 2 wherein said means carried by said side plate is a cam.

7. A machine for winding electrical coils as set forth in claim 3 wherein said means carried by said side plate is a cam.

8. A machine for winding electrical coils as set forth in claim 4 wherein said means carried by said side plate is a cam.

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