US2333570A - Automatic winding machine - Google Patents

Description

Nov. 2, 1943. H. F. HILD AUTOMATIC WINDING MACHINE Filed March 15, 1939 5 Sheets-Sheet 1 w PM R O T N E V m ATTORNEYS Nov. 2, 1943.

H. F. HlLD AUTOMATIC WINDING MACHINE Filed March 15, 1939 5 Sheets-Sheet 2 Nov. 2, 1943. H. F. HILD 2,333,570

AUTOMATIC WINDING MACHINE Filed March 15, 1939 5 Sheets-Sheet 3 INVENTOR *mmmM ATTORNEYS Nov. 2, 1943. H. F. HILD AUTOMATIC wnmme mcumn' 5 Sheets-Shee t 4 Filed March 15, 1939 sic mm w \NVENTOR M A411 BY H z ,EMQW ATTORNEYS Nov. 2, 1943. H. F. HILD 7 2,333,570

AUTOMAT IC WINDING MACHINE Filed March 15, 1939 5 Sheets-Sheet 5 INVENTOR ATTORN EY Patented Nov. 2, 1943 UNITED- su'rom'rrc wmnmc mourns Henry Frank Hild, Plainileld, N. 3., asslgnor to Condenser Corporation of America, South Plainiield, N. 3., a corporation of New York Application March 15, 1939, Serial No. 281,958

20 Claims.

This invention, relates to winding machines for winding into condenser rolls alternate strips of foil and insulation and has for its principal objects to simplify the winding of such rolls, minimize waste of materials and increase the rate of production.

It has heretofore been the practice in the winding of foil and paper or other insulator strips into condenser rolls, for the operator to cut the strips when the condenser roll is completed and to tear away the end portion of the foil strip to insure that no part oi the foil strips shall extend beyond the ends of the covering paper strips; for if any part of the foil did extend beyond the ends of the insulation there would be danger of the foil strips touching each other and thus short-circuiting the condenser. This has entailed loss of time and of the foil material. According to this invention this loss is eliminated by automatically perforating the foil and pulling the foil apart at the perforations before the insulating strips are cut. and then cutting the insulating strips at a point between the severed foil ends.

Further objects and advantages of the invention will become apparent from the following detailed description considered in reference to the following drawings of which,

Fig. 1 illustrates a side view of the winding apparatus;

Fig. 2 illustrates a top view of the apparatus;

Fig. 3 illustrates a sectional detail of Fig. 1 taken at line 3-3 oi Fig. 2, showing the foil perforating apparatus;

Fig. 4 is another sectional detail of the apparatus shown in Fig. 3 illustrating a different position of the mandrels;

' Fig. 5 shows a mandrel pin;

Fig. 6 is an enlarged view showing the separation of the foil strips'during the operation of the machine;

Figs. 7, 8 and 9 show details of parts of the perforating mechanism;

Fig. 10 is a rear elevation view of the clutch and drive portion of Fig. 2;

Fig. 11 is a sectional view taken at line I l-ll of Fig. 2; and

Fig. 12 is another sectional viewtaken at line l2-l2 of Fig. 2.

The drawings ill machine into which the foil perforating and separating mechanism according to this invention is incorporated.

The winding machine comprises a frame It supporting a vertical panel H which supports eight pins I: to It, inclusive, carrying rotatable spindles l2 to is, respectively, which support rolls of foil and insulating material such as paper. Rolls i, 2, 3 and 4 are paper or insulating rolls and rolls l and 3| are foil rolls. At the opposite trate a condenser winding end of frame Hi from the panel there is fastened a stud 2| on which is journaled a hand wheel 22 which acts as a rotatable mandrel support.

A head 32 on this stud holds the hand wheel.

in place. The hand wheel is provided with three radial arms 23, 24 and 25, each of which carries a hub 38, 21' and 23', respectively, in which are Journaled bushings, 21 and 23, respectively', through which protrudes grooved mandrels 29. 30 and 3i, respectively, fixed to their respective bushings. (See Figs. 3 and 4.) Each of the bushings is free to rotate within its hub or bearing 28', 21 or 23 (see Fig. 2) and at the back end of each bushing there is fastened 1s a pinion (I40, I40 and I4!" respectively) and also a collar provided with a driving pin 33 (shown in Fig. 2). A mandrel pin 34 having a head 35, shown in Fig. 5, is adapted by placing it in the groove in each mandrel to hold the assembled strips of foil and paper in layers between the pinand groove to cause them to wind up into the condenser roll when the mandrel is rotated, as shown in Fig. 3.

Power means is provided for driving the mandrels. This comprises a power driven pulley 33 (Fig. 2) fastened to a clutch member 31, the pulley and clutch member being free to rotate on a shaft 33 which is journaled in the frame it. Shaft 33 has threads 39 for a; substantial distance at one end, and at the opposite end has attached to it a beveled gear 40'. A clutch member 3'l' attached to the shaft 38 is adapted to engage with clutch member 31 to that when the member 31' is moved sideways into engagement at with the other clutch member 31 the entire shaft and beveled gear 40 is rotated. For the purpose of engaging the clutch members there is provided a lever 9 which when operated turns a bell crank 8 against a dog 'I fastened to the clutch 0 Journal bearing arm 1i, thereby moving the' members 31', ll, 12 and III to the left (Fig. 2). As shown in Fig. 2, there is also journaled to the vertical wall of frame in another shaft 4i having at one end a beveled gear 42 in engagement with beveled gear 40, and at the opposite end a collar 43 with a driving pin 44 which when the hand wheel 22 is in the position of Figs. 1 to 3, engages the driving pin 33 of the mandrel bushing collar with which it is in engagement; being thereby enabled to drivethat mandrel and wind the foil and paper strips into the con.- denser roll.

There is provided in accordance with this invention an automatic foil strip perforater 43 (shown in section in- Figs. 3 and 4) which perforates the foil strip at the proper point so that the foil strip severs when tension is applied'at both sides of the perforation, followed by the cutting of the paper strip in the manner herein- 30 after described. The perforator 46 comprises two .endblocksllandllioinedatthetopandbottom bybars48and88. Thisdevice 48Isheldby anarm48'attachedtoblock48,apin 'I8fixed totheframe I8beingpassedthroughaholein arm48'; andthe arm88'isfixedtothe pin I8 by set screw I8. Extending between the end blocks are two rotatable pins 8| and 88 (see the sectional view of Fig. 8) each having held between its ends 'a plate 88 and 84, respectively, each plate having perforating teeth 88 attached to protrude into holes 88 of perforation plates 81 and 88, respectively, fixed between the end blocks '81 and 48. Fig. 7 shows a detail of the assembly of plates 88 and 84 and their pins. Fig. 8 illustrates a detail of fixed plate 81 and Fig. 9 shows fixed plate 88. Pin 8| has fastened to one end a lever 88 and pin 88 similarly has fastened to it a lever 88 immediately under and in sliding enmoment with lever 88. Lever "has fastened to it an arm 8| carrying flexible en g plates 8| which extend horizontally and are adapted to be operated automatically to rotate pins II and 88 and thin deprss teeth "into holes 88 to perforate the foil strips at the proper time almg the line of the perforated teeth. @AsshowninFlgs.1,2,3and4,thereisattachedtothehead 82 ofthestud 8| abs-r88 having at one end a knife blade 84 which functions to out the paper strips after the foil has been perforated and broken apart.

For determining the amount of paper and foil strip permitted to be wound on the mandrel before the perforating and cutting of the strips, there is provided a mechanism (shown in Fig. 2) for counting the revolutions of the mandrel. This is the mechanism shown in Weiss Patent 2,166,852 issued July 18, 1839. This comprises a half nut 88 slidably pivoted at one side thereof on a rod I2 and the threaded shaft 88 so that when this half nut is in engagement withthe rotating tates mandrel 8|.

byaconnectingrodll'witharatchetpawl.

which pivots a't pin 88. On the spindles I8 and II towhicharefixedthefoil rolls 88 and 8| there are fastened ratchet wheels 81 and 88, respectively, adapted to be engaged by the pawl teeth 88 and 88, respectively. The arrangement is such that when the hand wheel 82 is rotated the hub 81' moves out of engagement with the portion 88 of rod 88, allowing the spring 82 to pull the pawl teeth 88 and 88 into engagement with the respective ratchet wheels 81 and 88, thus stopping the rotation of the foilrolls. Then when the next hub 28' on the hand wheel pushes member 88, the pawls are disengaged. allowing the foil rolls to rotate again.

There is also provided a stationary mutilated gear I fastened on fixed stud 2 I whose teeth are cut away approximately 120 degrees as shown in Figs. 3 and 4 which gear is in engagement with two of the pinion gears I88, I48 and I48" rigidly fastened to the bushings 88, I! and 28 of mandrel shafts 28, 88 and 8|, respectively. when hand wheel 22 is rotated in a counterclockwise direction pinion gear I48" engages gear I and ro- The first teeth of gear I are so positioned that the pinion gears do not engage it and are free to rotate while in the winding position.-

To facilitate the feeding of the strips of foil to the mandrel there is provided a feeding mechanism comprising idler wheels I88 and I8I (see Figs. 1 and 2), the wheel I88 being held in fric-' tional engagement with the foil roll 88 and paper roll 2 and the other wheel |8| being held in fricshaft it travels to the right (with reference to Fig. 2) untilitstrikesastopflflxedtoabarfl. Bar

81 has at its end a dog 81' which strikes a catch 88 adapted to engage a head I8 located at the end of shaft 88. Head I8 is rigidly fastened to bar If, the other end of the bar beingattached to the Journal bearing arm II, which moves clutch 81'. When the stop, 88 is engaged by the travelinghalfnut88thecatch88isliftedfromhead I8 causing the latter to spring to the right (with reference to Fig. 2) by action of compression spring 18, and thus disengage the clutch members 81 and 81' so that the mandrel which is being driven new steps. At the same time, due to the disengagement of the under surface of head It from over member I8 on bar I8, spring I4 is permitted to lift bar II, which lifts the half nut out of engagement with the threads 88, pivoting it on bar 12 and permitthig the half nut to return home by the action of hairpin spring I8. When the half nut is almost back in its initial position thebar88 attachedtothehalfnutstrikesthe cushion plates 8|" attached to the arm 8| of the perforating mechanism, in passing, because the halfnutisnowtiltedtoward arm 8| bybarI8 to permit this striking. The striking of plate 8| rotates the shafts 8| and 82 to produce a line ofperforations in the foil strips which are under the teeth. These shafts 8| and 82 then drop back to the unperforating position by the weight of arms 88 and 88.

Thereisprovidedabrakingfor braking the rotation of the foil rolls 88 and 8|.

This apparatus (shown in Fig. 1) comprises a rod 88 pivotedatpinfltotheframeandconnected tional engagement with the foil roll 8| and the paper roll 4. The top wheel is lournaled at the end of an arm I 82, the opposite end of this am being pivoted on lever arm I88, one end of this latter lever I88 being pivoted at the spindle of the paper roll 2 and the other end having a weight I84 for causing the idler wheel to rest firmly on the rolls 88 and 2. By this arrangement the idler wheelis always maintained at the same definite frictional engagement with each of rolls 88 and 8.

The lower idler wheel I8| is similarly iournaled on the lower end of arm I88, the upper end of which is pivoted-on the end of a lever arm I88 journaled on the spindle of roll 4. end of this latter lever I88 carries a weight I 81 which always pulls the idler wheel up against the two rolls 4 and 8|.

When the insulating strips are pulled the idler wheels I88 and |8| rotate and tend to rotate the foil rolls with which the idlers are in engagement. This arrangement facilitates the feeding of the foil strips by causing the rotation of the foil rolls 88 and 8| when theratchet pawls 88 and 88 are not engaged. This foil feeding arrangement is described and claimed in greater detail in x3, and also threads the paper strips I82, I88, I88

and!" through device 48, the paper I82 passing over platen, paper I88 and I 84 passing under plate 81, ahd paper I88 passing under plate 88, as shown in Figs. 3 and 4. These layers of strips are then run past the groove of mandrel 8| and the mandrel pin 84 is inserted in the groove and into the end of bushing 88 to hold them.- The The Opposite outer end of the mandrel fits into the space 35' of the mandrel pin head 35. (See Fig. 5.) The starting lever 9 connected with member 1|, is then operated to engage the clutch members ll and 31' and to depress bar 15 by the riding of head 10 on bevel 18" to the top of member I! on bar 15. The shafts 38 and 4| and mandrel 3| are rotated, thus rolling the condenser. The half nut 85, which prior to the rotation of shaft 38 was in its initial position shown in Fig. 2, moves to the right on the rotating shaft 38, and at the end of a predetermined number of mandrel turns the half nut 85 strikes the stop 88, movins bar 61 to the right and thus lifting catch 88 from head 10 and causing this head on the clutch member 31' attached thereto to spring to the right away from the other clutch member 3!. This stops the revolution of the mandrel and simultaneously causes bar 15 to lift half nut 85 from the worm, causing the half nut to spring to the left so that immediately the perforator arm BI is struck by bar 80, causing the two foil strips we and IN to be perforated by the perforating members. Immediately after the perforating operation the perforating plates move back to their initial position due to the weight of arms 59 and 8d. The operator then grasps the hand wheel at the same time operating catch I10 to retract pin ill from an indentation in the hand wheel, and rotates the hand wheel counterclock-wise (with reference to Fig. l) for 120 degrees to bring the next mandrel 30 into operating relation with the shaft 4| where it is held in position by pin I'll.

After the hand wheel 22 starts to turn, the pinion gear I40" engages gear Itl thus rotating mandrel 3| further, and the perforated foil is pulled and driven to the winding position of the next mandrel. Hub 21 then leaves engagement with bar 96, and the spring 82 rotates the lever 94 in the clockwise direction about its pivot 85 so that the pawl teeth 85 and to engage respectively with ratchet wheels 81 and 88 that are fastened rigidly on the foil spindles. Thus, when the operator has rotated the hand wheel partway, for example, about 60 of the 120 degrees rotation to the next mandrel position, the foil spindles are stopped from further rotation by the brake, and the foil being thereby stopped from further feeding, breaks along the line of perforations which have just been made. As the hand wheel continues to rotate to the full 120 degrees the paper strips continue to be pulled so that they will lay over the next succeeding mandrel, and the broken foil ends separate several inches within the paper strips. Fig. 4 shows the turned position of the hand wheel at the instant the foils are breakin apart at I80. As the operator continues to operate the hand wheel to the full 120 degrees the ends of the foils I and IM, severed at the perforations, pull further apart, assuming the position shown in Fig. 6; and during this turning of the hand wheel the mandrel which has just been wound continues to rotate in the winding direction by the meshing of the pinion I40" with stationary gear |4| so as to continue to roll up the severed strips of foil and the uncut insulating strips. At the end of the 120 degrees travel the insulating strips engage the stationary cutter as, as shown in Fig. 6, which cutter is adapted to cut the paper about midway between the severed ends of the foilstrips. A label may then be pasted over the roll tohold the strips on the wound mandrel.

Terminals may then be attached to the foils of the wound condensers. If the foil rolls 90 and 9| be positioned at their spindles so that the edge of one foil strip extends beyond the edge of the paper strips, and the opposite edge of the other foil strip extends beyond the opposite edge of the paper strips, the condenser roll will be formed with the foil edges protruding from the two ends of the roll, so that conducting terminals may readily be soldered to these. protruding foils.

Since the insulating and foil strips will extend over the next mandrel 30 at the end of the degrees rotation, it is only necessary in order to start the next condenser roll, to place the mandrel pin in a groove in mandrel 30 prior to the cutting of the paper strips. Then after the cutting the roll on mandrel so is wound up in the same way as described for the mandrel 3|, because mandrel at is now in operating relation with shaft 4|.

It will be noted that when the mandrel 30 is coming up to the winding position while the hand wheel is being turned, its driving pin 38 engages with a movable spring latch cam 200 which rotates with pin 83 to the top of the hand wheel so that when the pin leaves the camming surface it has positioned the mandrel with the groove upward, ready to receive the foil and insulating strips for the succeeding mandrel winding. Just before the mandrel reaches the operating position in relation to its driving shaft 4| the latch 20o drops back to the position shown in Fig. 1, ready to operate on the driving pin of the next mandrel when the hand wheel is again rotated.

By reason of the automatic perforating and severing of the foil and cutting of the paper strips, the labor heretofore involved of tearing out the ends of the foil to insure that they lie well within the ends of the paper is eliminated; and also the wastage of foil heretofore attendant upon tearing out parts of it is eliminated. By the use of the foil perforator in connection with the brake for the foil roll, it has been found that the output of a machine can be greatly increased. It will also be noted that by reason of the fact that the a foil is perforated and not cut it is not thrown out of line when severed, as due to the perforation the foil severs at the perforation without moving out of line.

I claim:

1. A foil-severing mechanism in combination with a machine for winding foil and insulating strips into condenser rolls of the type comprising a drive shaft, an engageable clutch through which said shaft is adapted to be driven from a source of power, a mandrel support having journaled therein a plurality of mandrels, said support being rotatable for placing said mandrels successively in driving relation with said drive shaft, a lever for engaging said clutch to start the mandrel winding, and a device for automatically disengaging said clutch upon the expiration of a predetermined number of mandrel revolutions, said severing mechanism comprising: foil perforating teeth positioned adjacent the foil traveling to the mandrel, an arm for operating the teeth and a lever operable upon disengagement of said clutch to operate said arm and thus produce a. line of perforations across the foil, an interlocking means adapted to interlock with the mandrel by movement of said rotatable mandrel support, said interlocking means when interlocked with the mandrel being adapted to prevent rotation of the mandrel in the unwinding direction, a braking means operated by movement of said mandrel support to retard the foil strips at the side of the perforations remote from the mandrel against traveling toward the mandrel when said mandrel support is turned to move the wound mandrels 'out of driving relation with the drive shaft, so that the foil strips are pulled apart at the perforations and the torn ends separate during the turning, thereby permitting severing of the insulating strips between the separated foil ends.

2. In a foil and insulating: strip winding machine comprising a movable frame a winding mandrel mounted on said frame and rotatable relatively thereto, a power drive for said mandrel, a plurality of spindles for holding rolls of foil and insulating strips to be wound into a roll on the mandrel, and means for automatically stopping the rotation of the mandrel after a predetermined number of turns is wound thereon: a perforating device through which the foil strips are passed in traveling from the foil rolls to the mandrel, said perforating device having movable perforating teeth for perforating the foil, a lever automatically operated upon the stoppi 8 of the rotation for moving the teeth to perforate the foil strips, and a brake which when set holds the foil rolls from further rotation, said movable frame associated with the mandrel acting to set the brake and operate on the mandrel side of the perforations to pull the foil strips andizhereby sever the foil at the perforations.

3. The method of making condenser rolls which comprises winding on a mandrel alternate interleaved strips of insulating material and conducting material, stopping the rotation of the mandrel after the desired number of turns has been wound, perforating the conducting strips along a line ClOSSil'lg said conducting strips, at a position outside the mandrel winding, moving the mandrel in a direction to pull the strips in the general direction they were traveling while the mandrel was rotating while holding the mandrel against rotation in the unwinding direction, then holding those parts of the conducting strips asaas'ro automatically disengages said clutch when a predetermined number of turns of foil and insulating strips is wound on said mandrel from mils, said movable frame being operable to pull from the rolls, after a winding is made on the mandrel, sufficient additional length of the strips to reach the winding positon of the mandrel for the succeeding winding after the strips are severed at a position between the wound mandrel and the rolls, said severing mechanism comprising: foil perforating teeth positioned adjacent the foil strip traveling from the foil roll to the mandrel, an arm operative to move said teeth into perforating engagement with the foil strip, a lever moved upon the disengagement of said clutch to operate said arm and thus produce a line of perforations across the foil strip, an interlocking means adapted to interlock with the mandrel by movement of said movable frame, which when interlocked with the mandrel, prevents rotation of the mandrel in the unwinding direction, a brake operated during movement of said movable frame to hold the foil roll against which are at the side of the perforations remote I denser roll: a winding mandrel on which the strips are wound, said mandrel having a pinion attached to it, a turns-counter operated means for automatically stopping the winding of the roll on the mandrel after a number of turns is wound, a perforator for perforating the foil after the turns are wound, a movable frame on which further rotation in the direction of feeding to the mandrel so that the foil pulls apart at the perforations and the parted ends separate for a distance, thereby permitting severing of the insulating strips between the separated foil ends.

6. A mechanism adapted to sever a foil strip which is wound with insulating strips into a condenser in a winding machine having a winding mandrel supported on a movable frame which when in its winding position may be driven from .a source of power through an engageable clutch,

Jacent the foil strip travelling from the foil roll to the mandrel, an arm operative to move said teeth into perforating engagement with the foil strip, a lever moved upon the disengagement of said clutch to operate said arm and thus produce a line of perforations across the foil strip, gear 7 means movable into engagement by movement of the mandrel is mounted for moving the mandrel in a direction'to pull the strips in the general direction in which said strips were traveling to the mandrel during the winding, a fixed gear for engaging the pinion on the mandrel during said movement of the movable frame for producing further mandrel rotation, a brake operating on the foil at the side of the perforations remote from the mandrel for tensioning the foil to part it at the perforations, and a knife for severing the insulating strips at a position between the separated severed ends of the foil.

5. Mechanism adapted to sever a foil strip which is wound with insulating strips into a condenser in a winding machine having a winding mandrel supported on a movable frame and driven from a source of power through an ensaid movable frame to rotate the mandrel in the direction to continue the winding of the strips thereon, a brake operated during movement of said movable frame to hold the foil roll against further rotation in the direction of feeding to the mandrel so that the foil strip severs at the perforations and the severed ends separate for a distance, thereby permitting severing of the insulating strips between the separated foil ends.

'7. In a foil and insulating strip winding machine comprising a winding mandrel supported on a movable frame, a power drive, a releasable clutch through which the mandrel is driven from said drive. a plurality of spindles for holding rolls of foil and insulating strips to be wound into a roll on the mandrel, and means for automatically disengaging the clutch after a predetermined number of turns is wound on the mandrel: a perforating device through which the foil strips are passed in travelling from the foil rolls to the mandrel, said perforating device having movable perforating teeth for making a line of gageable clutch, a turns-counting device which perforationsacrossthefomalever operatedupon release" of the clutch for moving the teeth to perforate the foil stripe, a brake whichwhen set holds the foil strips at'the side of the perforations remote from the mandrel from further feeding toward the mandrel, said movable frame being adapted to move the mandrel to pull the foil strips from the mandrel side of the perforations and to set the brake and thereby sever the foil at the perforations.

8. In a winding machine for winding a plurality of interleaved foil and insulating strips from supply rolls to form a condenser: a movable frame having mounted on it a mandrel on which the strips are rolled, means for stopping the rotation of the mandrel, a foil perforatcr, an arm which automatically operates the perforator when the mandrel rotation is stopped to produce a line ofperforations across the foil before the part of the foil thus perforated reaches the condenser roll, said movable frame carrying said mandrel being operable on the part of the foil which is on the side of the perforations nearer the mandrel to pull the perforated-part some distance beyond the perforator, a device operated during motion of said frame for rotating the mandrel in the direction to continue the rolling ofthe condenser, and a brake operated during motion of said frame for holding the foil at the side of the perforations remote from the mandrel.

9. In a foil and insulating strip winding machine comprising a movable frame, a winding mandrel mounted on said frame, a power drive for said mandrel, a plurality of spindles for holding rolls of foil and insulating strips to be wound into a roll on the mandrel, and means for automatically stopping the rotation of the mandrel after a predetermined number of turns is wound thereon: a perforating device through which the foil strips are passed in traveling from the foil rolls to the mandrel, said perforating device having movable perforating teeth for perforating the foil, means automatically operated upon the stopping of the rotation for moving the teeth to perforate the foil strips, a brake which when set holds the foil rolls from further rotation,

said brake being operated by movement of said movable frame so that the foil strips are pulled by movement of the frame from the mandrel side of the perforations against the force of the brake, to sever the foil at the perforations.

10. In a winding machine for winding a. plurality of interleaved foil and insulating strips from supply rolls to form a condenser: a movable frame, a rotatable mandrel mounted on said frame on which the strips are rolled, means for stopping the rotation of the mandrel, a foil perforator, a device which automatically operates the perforator when the mandrel rotation is stopped to produce a lineof perforations across the foil before the part of the foil thus perforated reaches the condenser ,groll, said frame when moved operating on the part of the foil which is at the side of theperforations nearer the mandrel to pull the perforated part some distance beyond the perforator, a device operated during motion of said frame for rotating the mandrel in the direction to continue the rolling of the condenser, and a brake operated during motion of said frame for holding the foil at the side of the perforations remote from the mandrel.

11. In a machine for winding a succession of condenser rolls, a plurality of rotatable mandrels mounted on a support which is movable to successive positions to place the mandrels succesassacrb sively in operating relation with a mandrel drive, means for leading a plurality of conducting and insulating strips in interleaved relation to the mandrel which is related tothe drive, a device for perforating the conducting strips after turns have been wound on the driven mandrel, abrake operable to retard the movement of the conducting stripe toward the driven mandrel from the side of the perforations remote from the mandrel, the counterclockwise movement of the man-'- drel support from one mandrel position to the next serving to operate the brake and being in a direction to pull the strips over the succeeding mandrel moved into relation with'the drive by said movement and to part and separate the parted conducting strip ends at a place between the two last-mentioned mandrels, a device for continuing the rolling up of the strips on the wound mandrel when the mandrel support is thus moved, a device for clamping the strips to said succeeding mandrel, a knife for cutting the insulating strips at a position between the said two last-mentioned mandrels and between the separated conducting strip ends, whereupon said succeeding mandrel can be driven and the roll on the first-mentioned mandrel completed and removed from its mandrel.

12. In a machine for winding a succession of condenser rolls, a plurality of rotatable mandrels mounted on a support which is movable to successive positions to place the mandrels successively in operating relation with a mandrel drive, means for leading a plurality of conducting and insulating strips in interleaved relation to the mandrel which is related to the drive, a device for perforating the conducting strips after turns have been wound on the driven mandrel, a brake operable to retard the movement of th conducting strips toward the driven mandrel from the side of the perforations remote from the mandrel, the movement of the mandrel support from one position to the'next serving to operate the brake and being in a direction to pull the strips over the succeeding mandrel moved into relation with the drive by said movement and to part and separate the parted conducting strip ends at a place between the two last-mentioned mandrels, an interlocking means adapted to interlock with the mandrel by movement of said support to prevent rotation of the mandrel in the unwinding direction, a device for clamping the strips to said succeeding mandrel, a knife for cutting the insulating strips at a position between the said two last-mentioned mandrels and between the separated conducting strip ends, whereupon said succeeding mandrel can be driven and the roll on the first-mentioned mandrel completed and removed from its mandrel.

13. Apparatus according to claim 12 in which said mandrels are spaced apart on the support by a distance at least as great as said separation of the conducting strips so that said separation lies between said mandrels when the insulating strips are cut,

14. In a machine for winding a succession of condenser rolls, a plurality of rotatable mandrels mounted on a frame which is movable to successive positions to place the mandrels successively in operating relation with a mandrel drive, means for leading a plurality of conducting and insulating strips in interleaved relation to the mandrel which is related to the drive, a device for parting the conducting strips after turns have been wound on the driven mandrel, means for retarding the movement of the conducting strips toremote from the mandrel, the movement of the frame from one position to the next being in a direction to pull the strips over the succeeding mandrel moved into relation with the drive by said movement and to separate the parted conducting strip ends at a place between the two last-mentioned mandrels, an interlocking means adapted to interlock with the mandrel by movement'of said support to prevent rotation. of the mandrel in the unwinding direction, a device for clamping the strips to said succeeding mandrel, whereby the insulating strips may be cut at a position between the two last-mentioned mandrels and between the separated conducting strip ends and the succeeding mandrel then driven and the roll on the first-mentioned mandrel completed and removed from its mandrel.

15. In a winding machine for winding a plurality of interleaved foil andinsulating strips from supply rolls to forms. condenser: a movable frame carrying a mandrel on which the strips are rolled, a foil perforator, means for automati'cally operating the perforator to produce a line of perforations across the foil before the.

part of the foil thus perforated reaches the condenser roll, said movable frame being operable with the rotating mandrel to pull the part of the foil in advance of the perforation so as to part and sever the foil along the line of perforations while the foil is being retarded at a point in back of the perforations by a braking device operated during the motion of said frame. 1 I

16. In a winding machine for winding a plurality of interleaved foil and insulating strips from supply rolls to form a condenser: a movable frame carrying a mandrel on which the strips are rolled, means for measuring the foil and insulating strips wound on the mandrel, a foil perforator, means which automatically operate the perforator to produce a line of perforations across ward the driven mandrel from the parted side from supply rolls to form a condenser: a rotatable mandrel driven from a source of power through an engageable clutch, control means ad- Justable to predetermine the amount of said strips to be wound to disengage said clutch, said control means comprising a half nut slidable in one direction on a threaded revolving shaft driven from the source of power and returnable to starting position, a measuring rod, a device for stopping of the half nut at any fixed point of its travel in one direction on said measuring rod. means set in operation by said stopping device to disengage the clutch from the driven shaft and reverse the direction of travel of said half nut and means operable by said half nut in returning to its original starting position to operate a foil perforator mechanism to produce a line-of perforations across the foil, means acting. to tension the foil against the pull of the winding mandrel so as to sever and separate the perforated foil along the line of perforations. and means to cut the insulating strips between the separated ends of the foil.

19. In a condenser winding machine a rotatable mandrel for winding up interleaved foil and insulating strips driven from a source of power through an engageable clutch, a movable frame the foil before the part of the foil thus perforated reaches the condenser roll, said movable frame being operable with the rotating mandrel to pull the foil was to part and sever the foil along the perforations while the foil is being retarded by a braking device operated during the motion of said frame, and having cutting means movable frame, means for cutting said insulating strips, an automatic clutch mechanism operable after predetermined lengths of foil and insulating strips have been wound, perforating means arranged between the foil supply rolls and the insulating strip cutting means which operate to perforate the foil; the movable frame being adapted to pull on the side of the foil in advance of the perforations, means operating on the foil supply rolls to retard the advance of the foil while underthe action of the movable frame so that the foil separates at the perforations; said strip cutting means being aiiixed to the movable frame to cut the insulating strips between the separated ends of the foil and means mounted on the movable frame for rotating said mandrelto wind up the severed ends of the strips.

18. In a winding machine for winding a plurod, a device for stopping the travel of the half rality of interleaved foil st ip on which said mandrel is mounted, control means connected to the source of power for disengaging the clutch when definite lengths of foil and insulating strips have been wound, said means controlling the operation of a lever for operating foil perforators to perforate the foil at that time, said movableframe being operable with the rotating mandrel to pull the foil, a brake for preventing further feeding of the foil while said movable frame is in motion so that the foil strips sever and separate at the perforations, means aiilxed to the movable frame for severing the insulating strips and means for rotating the mandrel after the severance of the foil and the insulating strips to wind the trailing ends of the strips onto the mandrel.

'20. A foil measuring and severing mechanism in combination with a machine for winding foil and-insulating strips into condenser rolls of a type comprising a rotatable mandrel supported on a movable frame and driven from a source of power through an engageable clutch, said foil measuring and severing mechanism comprising a half nut slidable on a threaded revolving shaft driven from the source of power. a measuring nut at a p edetermined point, means set in motion by said stopping device to disengage said clutch, means to return the half nut to its original position, a foil perforator actuated by a lever on the-return of said half nut to produce a line of perforations across the foil, an interlocking means adapted to interlock with the mandrel by movement of the movable frame, said interlocking means when interlocked with the mandrel being adapted to prevent rotation of the mandrel in the unwinding direction, a brake operable upon the movement of'said frame to retard the feeding of the foil toward the driven mandrel, so'

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