US2298923A - Machine for winding coiled sections - Google Patents

Description

0d. 13, .1942. BEEBE 2,298,923

MACHINE FOR WINDING COILED SECTIONS Filed July 18,-1936 4 Sheets-Sweet 1 INVENTOR ATTORNEY R. ,H. BEEBE MACHINE FOR WINDING COILED SECTIONS Filed July 18, 1936 Oct. 13, 1942.

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INVEFFQR A. 6. 35:15:

. ATTORNEY Oct. 13, 1942. R. H. BEEBE 2,298,923

MACHINE FOR WINDING COILED SECTIONS Filed July 18, 1936 4 Sheets-Sheet 3 w z I I II I AINVIENTOR R 1% 55555 ATTORNEY 0t.13,1942. .R, H BE- 2 2,298,923

MACHINE FOR WINDING COILED SECTIONS Filed July 18, 1936 4 Sheets-Sheet 4 I INVENTOR IEH. 5555:

ATTORNEY Patented Oct. 13, 1942 MACHINE FOR WINDING COILED SECTIONS Raymond H. Beebe, Glen by mesne assignments, to Westinghouse Electrio and Manufacturing Ridge, N. J., assignor,

Company, East Pittsburgh, Pa., a corporation of Pennsylvania 7 Application Iuly 18, 1936, Serial No. 9 1,315 7 11 Claims. (01. 153-64) This invention relates to a machine for winding a helically wound wire into a secondary helix and more particularly to the manufacture of what are termed coiled-coil filaments for incandescent electric lamps.

In my Patent No. 2,013,432 issued September 3, 1935, and assigned to the present assignee, a machine is shown and described in which a primary helically wound coil is formed into a secondary coil by means which operate to successively separate the turns of the primary coil to produce a continuous coiled coil. The present invention utilizes the method set forth in the above mentioned patent but provides a machine so constructed and arranged as to produce coiledcoil filaments having straight terminals; that is, terminals which are formed from the primary coil. 1

In the manufacture of incandescent electric lamps, it is the practice to provide what is termed a lamp mount consisting of a glass pedestal or flare tube from which lead wires extend. The filament is secured to the lead wires by welding the terminals of the filament to the leads. For this purpose it is necessary to provide a length of filament with straight ends. In the case of the ordinary helical filament, the straight ends or terminals are solid wire whereas in the case of a coiled-coil filament the straight ends or ter minals consist of short lengths of the primary coil. l

It is, therefore, an object of the pr t mvni.

tion to provide a simple and efiicient machine for producing coiled-coil filaments with straight terminals.

Another object of the invention is to provide a machine for coiling a helically wound wire into a secondary coil having straight terminal portions disposed in a definite angular relation to a coiled portion.

A further object of the invention is to provide a machine for winding a primary coil into a secondary coil with straight terminals formed from the primary coil.

A still further object of the invention is to provide a machine so constructed and arranged as to wind a helically coiled section into a, helical coil, and for automatically removing the coil from the coiling means.

Other objects and advantages of the invention will be more clearly understood by reference to the following description, together withv the accompanying drawings in which:

Fig. 1 is a plan view of a machine constructed in accordance with the present invention;

Fig-2 is a side elevational view of the machine shown in. Fig. 1;

Fig. 3 is an enlarged end view of the coil-winding mechanism, taken on line III- IlI of Fig. 1, looking in the direction of the arrows;

Fig. 4 is a fragmentary perspective View of an arbor for holding a primary coil during formation into a secondary coil; 7

Fig. 5 is a view taken on line V-V. in Fig. 1, looking in the direction of the arrows;

Fig. 6 is a detail cross sectional View of means for holding a section of coil during a coil-winding operation and V v Fig. 7 shows a finished coiled-coil as mounted on a lamp stem.

In the selected embodiment of the invention, a machine is provided intowhich are fed helically coiledsections A (seeFigs. 1' and 3), called primary coils, which sections are wound into a secondary coil Bhavingstraight terminals C and D.

.The straight'terminals are portions of the helically-wound primary coil and, as shown in Fig. '7, these terminals are secured-by welding or clamping to lead wires E and F of a lamp stem G.

The coiled sections A may be made by any desired method as, for example, on a mandrelless coiling machine; or may be mandrel-wound, the mandrel having been removed by the usual method. The coiled sections A may vary in diameter, and may be of different lengths, depending on the rating of the lamp or other device in which the coil is to be used as a resistance element. Y

Primary coiled sections fed to the presentmachine are of a. definite length for a given type of lamp and may be delivered from a hopper by automatic feeding means (not shown). In the present machine the coiled sections are supplied by hand feeding.

A machine constructed'in accordance with the present invention may comprise a supporting frame" l0 including a base plate ll. At one end of the base plate and secured thereto by bolts is a motor I4 which, in the selected embodiment of the invention, constitutes" the source of, power. The motor is provided with a pulley and'motion is translated to what may be termed a main driving shaft 16 by means of a belt I1 and a pulley l8 secured to the shaft l6 which latteris'journaled in-a bearing l9. This bearingalso serves. inconjunction-with one endof the shaft l.6, as

55, a bearing for an oscillatory yoke-2i in the form.

of a rectangular frame in which one end of a shaft 22 is journaled.

The shaft 22 is disposed transverse to the shaft I6, and bevel gears 23 and 24 on shafts I6 and 22 respectively serve to transmit motion from shaft I6 to shaft 22. The shaft 22 is also journaled in bearings 20 on a bearing bracket 2| integral with the yoke 2|, which latter is rockable about shaft I6 and pin 22'. One end of the shaft 22 may thus be lifted, and by reason of the miter gears 23 and 24, the said shaft 22 is maintained in operative relation with shaft I6, for purposes to be describedlater.

The foregoing detailed description includes the mechanism necessary for effecting anoperation of the machine, and it is believed that the various mechanical elements and their operation will be more readily understood by a general description giving the essential elements and their operation.

A coiled section A is fed into the machine-at a loading table 26. The section A is in the form of a helical coil of a definite length ready'to be shaped into a secondary coil B of a definite length, such as that shown in Fig. '7, having straight ends C'and- D.

The coiled section A is moved into position beneath what is termed an impeller or'separator 3| mounted at one end of shaft 22, as more clear- I,

1y shown in Fig. 3. This impeller is provided with a plurality of radial propeller-like or screwtype blades 32 which, when the impeller is ro= tated. pass between successive turns of the coiled section and spread them. This spreading causes the coiled section to take the form of a' secondary coil;

As shown in Figs. 3 and l, theimpeller rotates in a groove 33' at one endof an arbor 34 (see Fig. 5) which arbor is'supported in a bearing and is adjustablysecured by set screw 45'. The arbor extends through and'is spaced from a sleeve in a bearing 46'. Thepurpose of the sleeve Will be described later; At thefree end of the arbor and adjacent to'the groove 33 is a cradle 48 in which the coiled section rests during the secondary coil-winding operation. The cradle is provided with a notch 49 to allow clearance from the impeller. When a coiled section or primary coil is moved into position to be'again coiled, it rests in the cradle and one end of the section engages a stop 50; so positioned as to bring the impeller over the section at a point a given number of turns from the end of the section; thus leaving a portion D, which is straight, to be used to clamp the coiled-coil to a lead wire of a lamp.

As shown in Fig. 3, the impeller 3| is so positioned that each blade moves across the primary coil and between the turns thereof. The direction of movement of a blade as it passes between the turns, is in a plane substantially coincident with a plane intermediate and parallel to the turns between which the impeller. blade passes. The blades have sharp or knife-like edges and serve as wedges to spread the turns.

It will be understood that as the secondary coil begins to form, the uncoiled or straight end, as for example end D, must move about the axis of the secondary coil. It is necessary, obviously, to remove this straight end from the cradle 48 and for this purpose a guide blade 6|] is provided. As the secondary coil starts to form, the straight end D of the coiled section is guided from the cradle by the guide blade 6050 that asthe coiled section is coiled the straight end rotatesas the secondary coil isformed.

As this secondary coil issues from the cradle, it is supported by a removable mandrel 63 straddled by the upper and lower sections of the guide blade 60 which curve in opposite directions. When the coil is complete a straight section, as for example section C, is left in the cradle to provide terminal C for attachment to a lead wire. This finally formed straight end is removed from the cradle by means of an arm 54 on a sleeve 55 rotatable about the arbor 34 and mounted in bushing 54' in bearing 46.

The arm 54 lifts the straight end C from the cradle and the mandrel 63 is withdrawn from the coil, causing it to drop onto a chute 66 by means of which it is guided into a suitable receptacle. Mechanism for withdrawing the mandrel will be described later.

The foregoing description gives the operation of the mechanism which operation is caused by power derived from the motor I 4 which transmits motion to shaft I6. The bevel' drive, including gears 23 and 24, effects a rotation of theimpeller shaft 22:

The-shaft 22 also carriesa cam 67 which operates an actuating arm 68 pivoted at 69. One end II of the arm 68 is provided with a set screw I2 which engages one end I3 of an arm I4 pivoted at 15; The other end of thearm 14 carries the gripper member 62 to engage the coiled-section, and a spring 16 having one end secured to-the end 13 and the other end, secured to a post 'I'I, holds end 13 of the arm I4- against the set screw or adjustable stop 12. Thus the end II of the actuating arm 68 is moved upwardly and an opposite'end I8 ofthe arm 68 is held against the cam 61'.

The cam 61 rotates Withthe impeller shaft and is so formed that at the proper intervals'the actuating arm rocks to lift the gripper member 62 and permit the coiled section to'advance. The action of the gripper member and the operation of the impeller in cooperation therewith will be more fully described later.

After the impeller has operated to produce a secondary coil of the desired length, the impeller shaft 22 is liftedand at the same time the gripper member 62 is also lifted. This is accomplished by acam 8| on ashaft 82. This shaft is journaled in bearings 83 and 84 and also carries a cam 85, barrel cam 86 and a gear wheel 81. The gear wheel is disposed in mesh with an idler gear 88 carried on an adjustable bracket arm 89. The idler serves to change the direction of rotation, and is disposed in mesh with gear 9| on a stub shaft 92.

The gear chain just described is driven by gear wheel 98' on the main drive-shaft I6 which, as hereinbefore described, is driven from motor I4 and rotary motion is thus transmitted to shaft 82 to actuate the cam 8|. This cam engages a cam follower 93. at one end of a projection extending from bearing bracket 2|. which is integral with the yoke or frame 2|. The bracket 2| carries the impeller shaft and, as cam 8| rotates, the bracket and shaft with-the impeller are lifted. Inasmuch as the end I8 of the actuating arm 68 bears on the cam 6 'I, mounted on the impeller shaft 22,.the arm 68 will be rocked about its pivot, causing end I of the arm topress upon the end I3 of the gripper arm I4, causing the end carrying the gripper member to be raised and lowered to alternatelygrip' and release the coiled section. F

The cam 61 is so'formedandarran'ged that as a blade of theimpeller'leavesthe space between the turns of the primary coil and the wedging force of the blade tends to move the coil endwise, the gripper member 62 is lifted and the coil moves to position to receive the next blade between the next turns of the coil. Thus the coil is automatically advanced.

When the secondary coil has been made, the final or straight end, as for example end C, is still in the cradle 48 while the finished part of the coil is supported by mandrel 63. It then becomes necessary to lift the said end or straight portion of the coil from the cradle and for this purpose the arm 50 is provided. As hereinbefore pointed out, the arm is integral with a sleeve 55 and, as shown in Figs. 1 and 5, this sleeve is provided with a gear wheel 95 in mesh with a gear segment 95. The segment isgat one end of a rocker arm 91 (see Figs. 1 and 2) integral with a hub 98, secured to a sleeve 99 on a stub shaft IOI. Another hub I02 secured to the sleeve is provided with an arm I03, provided with a roller I04 positioned to be engaged by the cam 85, which serves to rock the segment and thus to rotate the sleeve 55 to cause stripper arm 54 to lift the straight portion C of the coil from the cradle 40. A spring I02 having one end secured to an arm I03 extending from arm I03, and the other end secured to the frame of bearing 89, causes the arm I03 to reverse the action of the segment 95 to return arm 54 to its starting position.

When the said straight portion has been lifted out of the cradle, the coil is wholly supported on the mandrel 63. This mandrel is then removed by means comprising a pivoted arm I96 pivoted at I01, see Fig. 1. One end of the arm is provided with rollers I08 disposed in the slot of the barrel cam 86 on shaft 82. The other end of the arm is provided with a pair of fingers I09 and H having pins to project between collars III on shank I I2 of mandrel 63, whereby a movement of the arm I about its pivot causes an endwise movement of the mandrel to strip off the coil for deposit on chute 56, and a continued movement of the cam causes the mandrel to be again positioned to receive another coiled section.

The present machine may be put into oper ation by starting the motor I4. When the im peller shaft has lifted, the gripper member 52 is also lifted. A primary coiled section of a given length is then inserted into the machine until one end D of the section engages the stop 50. When in this position, the impeller moves into operation with the primary coil and the gripper member engages the inner end of the coiled section.

It will be noted that the impeller starts by engaging the primary coil a given number of turns from the end, leaving this end portion D of the primary coil straight.

As the blade of the impeller passes between the turns of the primary coil and while the blade is still between the turns, the gripper member is lifted, thus permitting the impeller blade to advance the coil for the introduction of the next blade to advance the coil for the introduction of the next blade between the succeeeding turns of the coil.

As the impeller operates, the primary coil is formed into a secondary coil. The repeated and successive frictional engagement between the impeller blades and the primary coil has a tendency to rotate the uncoiled portion of the primary coil. The gripper member 62, therefore, serves to hold the primary coil against rotation so that each impeller blade will pass between the turns in a straight line along. the. primary coil. It will be understood that. any appreciable rotation of the primary coil during the secondary winding operation would cause a variation in the shape of the resulting secondary coil.

The impeller operates to produce the secondary coil B of a given number of turns and at the completion of the predetermined length of the secondary coiled section, the cam 8| lifts the impeller as well as'the gripper member 52, and the coil is released. As above pointed out, the final straight end C of. the coil lies in the cradle and is lifted therefrom. by the arm 54. The finished coil is supported on the mandrel 63 which then retracts by reason of the cam causing the coil to drop into guide chute I55. Asthe machine operates, the. arm 54 returns to its initial position and the mandrel is moved to receiveanother coil. While the impeller and the gripper members are elevated, another primary coilis inserted into the machine, the impeller and the gripper members are lowered, and the above operations are repeated.

Although a preferred embodiment of the invention is shown and described herein, it is to be understood that modifications may be made therein without departing from the spirit and scope of the invention as set forth in the appended claims.

I claim: I

1. A machine for winding a primary helicallycoiled section into a secondary helically-coiled section comprising cradle means for supporting said primary coil, secondary coil forming means, means for moving said coil-forming mean into operative relation with said primary coil to form a secondary coil, an arm normally underlying a portion of said primary section, means operating after the formation of a predetermined number of turns to remove said secondary coil-forming means, and means for rotating said arm to raise said primary section and release said secondary coil from said cradle means.

2. A machine for winding a primary helical section into a secondary helically-coiled section comprising means for supporting said primary coil, secondary coil-forming means, means for moving said last mentioned means into coilwinding position, a mandrel for receiving said secondary coil, means operating after the formation of a predetermined number of turns to remove said coil-forming means from coil-winding position an arm normally underlying the rear primary extension of said secondary coil for rotating the latter on said mandre1 to release it from the primary coil support, and means for withdrawing said mandrel to discharge said secondary coil.

3. A machine for winding a primary helically coiled section into a secondary helical coil having straight terminals comprising an arbor having a slot, a secondary coil-forming member movable in said slot, means for supporting a primary coil across said slot with a portion at one end of said section extending beyond said slot, means for operating said coil-forming means to cause a secondary coil to issue from said slot continuous with said extending portion, a guide blade spaced from and supported independently of said arbor and presenting a helically curved surface for defleeting said extending portion of said coil from said arbor as the secondary coil forms, and means for terminating the coil-winding operation a given distance from the otherend of said primary coil to leave a portion of the primary coil at the other end or said section, said portions constituting straight-terminals at opposit ends of said secondary coil.

4'. A machine for winding a primary coiled section into a secondary coiled section having straight terminals comprising, means for starting a secondary'coil-winding operation in one direction a given distance from on end of said primary coil, means for terminating said coil-winding operation a given distance from the other end of said primary coil, a mandrel for receiving said secondary coil, an arm underlying said other end portion of said primary coil for turning said secondary section free of the forming mechanism, and means for stripping said coil from said mandrel.

5. A machine forwinding'a primary coiled section into a secondary coiled section having a straight terminal comprising, means for supporting said primary coiled section, mean starting a secondary coil-winding operation in one direction on said supporting means a. given distance from one end of said primary coil to leave a straight portion, means operable after the. for mation of a predetermined number of secondary turns to terminate said coil-winding operation, and a rotatable arm normallyunderlying the rear end portion of said secondary coil to release said coil from said supporting means.

6. A machine for winding a primary coiled section into a secondary coil having a straight terminal comprising, means for starting a secondary coil-winding operation in onedirection a given distance from one end of" said primary coiled section to leave a straight portion, means operable after the formation of a predetermined numberof secondary turnsto terminatesaid coilwinding operation, a reciprocable mandrel to re,- ceive said secondary coil, and means synchronized. with said coil winding means for reciprocating said. mandrel to discharge said coil from said machine.

7. A machine of the class described comprising a loading table, means for feeding primary helical coils therealong, means for supporting a primary helical. coil therebeyond, separator means movable transverse to the longitudinal axis of and between the successive turns of said coil for separating the turn thereof to produce a secondary coil, holding means to secur said primary coil against endwise movement as said separator means moves between the turns, means for releasing said holding means, a removable mandrel for supporting said secondary coil, and a guide blade extending from said loading table for axially deflecting the forward end portion of said secondary coil as it forms on said mandrel.

8. A machine of the class described comprising means for supporting a primary helical coil, separator means movable transverse to the longitudinal axis of and between the successive turns of said coil for separating the turns thereof to produce a secondary coil, holding means to secure said primary coil against endwise movement as said separator means moves between the turns, means for momentarily releasing said holding means during movement of said separator means between said turns, and a movable arm normally underlying the rear end portion 01 the formed secondary coil to rotate and release itfrom said supporting means.

9. A machine for winding a primary helically coiled section into a secondary helical coil having terminal portions, the axes of which are straight, comprising an arbor formed with a cradl and a slot, a secondary-coil-forming impeller rotatable in said slot, means for feeding a primary coil to said cradle to be acted upon by said impeller, a sleeve rotatable about said arbor and having an arm normally underlying a portion of said primary coil, means for operating said impeller, starting on a portion spaced from an end of said primary coil, to cause a secondary coil to issue from said cradle, a mandrel for receiving said secondary coil as it forms, means for terminating the operation of said impeller, a given distance from the other end of said primary coil, to leave a portion of the primary coil disposed over said arm, means for rotating said sleeve to cause the arm to remove the coil from said cradle, and means for withdrawing said mandrel to release said coil from said machine.

10. A machine for winding a primary helically coiled section into a secondary helical coil comprising a cradle, a secondary-coil-forming impeller, means for feeding a primary coil to said cradle to be acted upon by said impeller, a sleeve rotatable about said cradle and havin an arm normally underlying a portion of said primary coil, means for operating said impeller to cause a secondary coil to issue from said cradle, means for terminating the operation of said impeller to leave a portion of the primary coil disposed over said arm, and means for rotating said sleeve to cause the arm to remove the coil from said cradle.

11. A machine for winding a primary helically coiled section into a secondary helical coil comprising a cradle, a secondary coil-forming impeller, means for feeding a primary coil to said cradle to be acted upon by said impeller, means for operating said impeller to cause a secondary coil to issue from said cradle, a mandrel for receiving the issuing coil, a blade comprising upper and lower section curved in opposite directions and straddling said mandrel, to be engaged by the issuing end portion of said secondary coil to guide the latter axially from said machine, means for terminating the operation of said impeller, and means for releasing said coil from said machine.

RAYMOND H. BEEBE.

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