US2061654A

US2061654A - Machine for making valve stem bases

Info

Publication number: US2061654A
Application number: US64210A
Authority: US
Inventors: William F Goff; Ewald F Tobold
Original assignee: Dill Manufacturing Co
Current assignee: Dill Manufacturing Co
Priority date: 1936-02-17
Filing date: 1936-02-17
Publication date: 1936-11-24
Anticipated expiration: 1953-11-24

Description

N 24, 1936. W. F. GQFF ET AL 2,061,654

MACHINE FOR MAKING VALVE SEEM BASES Filed Feb. 17, 1936 2 Sheets-Sheet 1 ZNVENTOR. Mum/w F Gar/=- 'BY K m-4.0 F 725040 (21 ATTORNEYS Nov. 24, 1936. W. F. GOFF ET Al.

MACHINE FOR MAKING VALVE STEM BASES Filed Feb. 17, 1936 2 Sheets-Sheet 2 INVENTOR. MLL/AM F Gar- 54440 E 765040 i E ATTW Patented Nov. 24, 1936 UNITED STATEg PATENT OFFIQE William F. Goff, Akron, and Ewald F. Tobold,

Cleveland, Ohio, assignors to The Dill Manufaturing Company, Cleveland, Ohio, a corporation of Ohio Application February 1'7, 1936, Serial No. 64,210

Claims.

This invention relates to a machine for fashioning or wrapping a cord base on the inner end of a valve stem such as is employed with pneumatic tires for motor vehicles or other inflatable articles.

An object of the invention is to provide a machine of the character specified above which will efficiently fashion or wrap a cord base on the end of a valve stem and which is semi-automatic in its operation.

A further object is to provide a machine of the character specified which is of simple construction and which is capable of fashioning or wrapping a cord base on the inner end of a valve stem quickly and efiiciently.

Another object is to provide a machine of the character specified wherein the turns of the cord of the cord base about the inner end of the valve stem progress from a point intermediate the ends of the stem to the inner end thereof.

Further and additional objects and advantages not specifically referred to above will become apparent hereinafter during the detailed description of an embodiment of the invention, which is illustrated in the accompanying drawings, wherein Fig. 1 is a vertical sectional view through the machine and shows a valve stem in position therein to have a cord base fashioned or wrapped on its inner end;

Fig. 2 is a diagrammatic plan and sectional view taken substantially on line 2-2 of Fig. 1 looking in the direction of the arrows and showing the relationship between certain of the operative parts of the machine;

Fig. 3 is a sectional view taken substantially on line 3-3 of Fig. 1, looking in the direction of the arrows;

Fig. 4 is a view illustrating the manner in which the cord base is fashioned or wrapped on the inner end of the valve stem and shows the condition of the base and the operation of fashioning the same substantially half way completed, and

Fig. 5 is a perspective view of a valve stem with the completed cord base fashioned or wrapped thereon.

The cord base and the method of wrapping or fashioning the same on the inner end of the valve stem is fully disclosed in the copending application of A. E. Bronson and William F. Goff, Serial No. 56,220, filed December 26, 1935, and the machine of the present invention constitutes one means by which such base can be fashioned and the method carried out semi-automatically and mechanically.

The machine comprises spaced parallel frame members I!) and H suitably interconnected and interbraced in their spaced parallel relationship by transverse members, such as the member l2 shown in Fig. 1. A shaft I3 is rotatably supported in the frame member it and is provided with collars l4 and l5 secured to the shaft on opposite sides of the frame member In to prevent endwise movement of the shaft. The outer end of the shaft l3 has fixed thereto a pulley I5, while the inner end of the shaft has fixed thereto a bevel gear H. The shaft I3 can be driven from any suitable source of power by a belt extending around the pulley it although it should be understood that motive power can be transmitted to the. shaft E3 in any other desirable manner. Intermediate the collar l4 and the frame member I a disk i8 is mounted on the shaft l3 and is keyed thereto to rotate therewith. The disk i8 is provided with a headed pin i9 located adjacent the circumference of the disk and having its head arranged on the inner side of the disk. The pin l9, when the shaft l3 and the disk 3 are rotating, engages in the slots of Geneva wheels and 2|. The Geneva wheels 29 and 21 are each provided with four radially extending slots 20!. and Zia spaced 90 apart. The Geneva wheel 28 is keyed to a shaft 22 rotatably supported in the frame members l0 and H and located to one side and forwardly of the shaft 13, as viewed in Fig. 2. The Geneva wheel 2| is rotatably mounted on a stub shaft 23 carried by the frame member l0 and has fixed thereto a gear 2 3 of substantially the same diameter as the Geneva wheel and arranged on the inner face thereof. The purpose of the gear 24 will later be explained. The Geneva wheels 20 and 2! are so arranged that the slots 20a. and Ma. respectively lie with respect to each other at the commencement of the operative cycle at angles other than 90, as clearly shown in Fig. 2, for a purpose later to become apparent.

The shaft 22 inwardly of the frame member l I has fixed thereto a large gear 25 which meshes with a pinion 26 fixed to the inner end of a short shaft 2? rotatably mounted in the frame member ll and lying substantially in line with the shafts l3 and 23, as clearly shown in Fig. 2.

The outer end of the shaft 2i has fixed thereto a bevel gear 28 which meshes with a similar bevel gear 29 fixed to the end of a shaft 30 that is rotatably supported in suitable bearing brackets 3i and 32 extending outwardly from the frame member ii, the shaft 39 being held against endwise movement by the sleeve of the gear 29 and by collars em and 32a keyed to the shaft and engaging the ends of the brackets 35 and 32, respectively.

It will be seen that during each revolution of the shaft E3 in the direction indicated by the arrow in either Fig. l or Fig. 2, the pin 19 of the disk 28 will engage in one of the slots 20a. of the Geneva wheel 28 and impart a quarter of a revolution to the Geneva wheel, shaft 22 and gear 25. The ratio between the gear 25 and the pinion 28 is such that for each quarter revolution of the gear 25 the pinion will make a complete revolution, as will also the gears 28 and 29 and the shaft 33. It will thus be observed that during each revolution of the shaft l3 there will be a complete revolution of the shaft 30 through the mechanism just referred to, but that such complete revolution of the shaft 30 is completed a substantial time prior to the completion of the revolution of the shaft i3.

Adjacent the bracket 32 and to the right thereof, as viewed in Fig. 1, a locking disk 33 is keyed to the shaft 30 to rotate therewith and said disk is provided in its periphery with a conical recess 33a, later to be referred to. The left hand end of the shaft 3!], as viewed in Fig. 1, extends into a recess 34a formed in the end of an elongated work holding member 35 which, at its opposite end, is provided with a recess 34b to receive and hold a valve stem 35. The latter end of the member 3 that is the left hand end as viewed in Fig. 1, is provided with an enlarged cylindrical head 340 having a plurality of circumferentially spaced axially extending openings in which are slidably mounted pins 36, the left hand ends of which project to the left of the head 35c and are provided with cylindrical grooves 36a, while the opposite ends of the pins, as viewed in the drawings, extend toward the right away from the head 3&0 and have formed at their tips shoulders or heads 36b. Springs 3'! surround the pins and abut at their opposite ends the heads 34c and 361). It should be noted that the pins 36 are arranged concentrically with respect to the recess 3% and although sixteen of the pins have been illustrated herein, various numbers could be employed as desired.

A spring 30a surrounds the shaft 30 between the right hand end of the member 3% and the collar 32a and tends to urge the member 3% toward the left, as viewed in Fig. 1. A member 38 is keyed to the member 34 adjacent its right hand end and is provided on its periphery with ratchet teeth 33a. The

members

38 and 34 are each provided with a radially extending bore arranged in alignment with each other with the bore in the member 3 3 slidably carrying a shoe 39 that frictionally engages the shaft 30 and. is held in such frictional engagement by means of a spring 39a arranged in the bores and abutting at its outer end an adjustable nut 39b screwed into a counter-bore formed in the member 38 in alignment with the bore therein. It will thus be seen that the member 38 and the member 34'; are frictionally connected to the shaft 30 to rotate therewith, but when the shaft 36 is held against rotation these members can be rotated independently thereof inasmuch as a slippage occurs therebetween. The member $8 is provided at its left hand end, as viewed in the drawings, with an axially extending headed pin 381) which engages with the cam dllb on one face of a cam member lii independently rotatably mounted on the member 34 but normally rotating with the member due to the frictional driving connection affected therebetv/een by means of a spring pressed friction shoe 49a engaging the periphery of the member 3 and. similar to the shoe 39 previously described. The cam member 4i is provided on its opposite faces with a cam ilb which engages the pin 381;, as previously explained and with a cam H30 which engages the heads 3% of the pins 36 carried by the member 34. The cam member 40 is held against endwise movement by suitable stop members ii located on opposite sides of the cam member and carried by the frame member H. The periphery of the cam member lil has formed therein a conical recess 30d adapted to cooperate with a locking pin, later to be referred to, wherefore when the pin engages in the recess the cam member will be held against rotation while, due to the slippage of the friction shoe 46a the member 3 3 will be free to rotate within the cam member.

The gear I? on the inner end of the shaft [3 meshes with a gear 4! fixed to the end of a rotatable shaft 612 mounted in suitable supports 43 and 4-; carried by the frame member it. On the opposite end of the shaft 42 from the gear ii a cam 55 is fixed to the shaft, to rotate therewith, while intermediate said cam 45 and support 53 a similar cam 6 fixed to the shaft to rotate a one to one ratio so as to rotate at the same speed.

The cam 5 which, as has been stated, is similar to the cam 46, see Fig. 3, has its periphery in engagement with a plunger :8 slidably carried in the frame member H and provided with a conical head adapted to seat in the conical recess 40d of the cam member ill when the inner end of the pin is in engagement with the high point of the cam iii to lock the cam member 40 against rotation. A spring ts surrounds the plunger 48 and acts to cause the inner end of the plunger to follow the periphery of the cam.

The cam 16 has its periphery in engagement with the inner end of a lever 50 that is pivotally connected intermediate its ends to a bracket carried by the frame member ii, and said lever 50 extends through an elongated opening in the frame member I i to the opposite side thereof from the bracket and is free to be rocked in its pivotal movement within the opening, see Fig. 3. outer end of the lever 5:! has pivotally connected thereto a pawl ti which engages with the ratchet teeth 38a on the member 38 to index the latter at a predetermined time in the operative cycle. A spring 52 anchored at its opposite ends to the frame member H and to the outer end of the lever 50 maintains the inner end of the lever in engagement with the periphery of the cam 46.

The cam M which, as has been stated, is similar to the cam i5, see Fig. 3, has its periphery in engagement with a plunger 53 extending through the frame member 5 l and having at its outer end a conical head adapted to seat in the conical recess 33a of the member 33 to lock the shaft 30 against rotation. A spring 5 3 surrounds the plunger 53 and maintains the inner end of the plunger in contact with the periphery of the cam.

The earns 45, G6 and 47 although identical are so positioned on the shaft @2 in assembling the machine that the cams 45 and t? will act at the The same time to move the

plungers

48 and 53, respectively, upwardly so that the heads of the plungers engaged in the recesses Md and 33a and lock the cam member ii] and the member 33 and shaft 30 against rotation. The cam member 45 is so positioned relative to the cams 55 and ill that its high point comes into engagement with the lever 55 to rock the latter and index the member 38 just after the high points of the cams 45 and 41 have engaged the inner ends of the plungers t8 and 53 and forced the same upwardly, the interval, however, being so slight that the cams may be said to act substantially simultaneously.

When the high point of the cam 55 engages the inner end of the lever 59 said lever is locked against the action of the spring 52 and in a direc tion such that the pawl 5! in engagement with the ratchet teeth 38a of the member 38 imparts a rotational or indexing movement to said member equal to one ratchet tooth space.

A hollow spindle 55 is rotatably supported on a. shaft 56 fixedly mounted in the frame member In and extending across the machine to the outer side of the frame member H. The spindle 55 adjacent the frame member l l is provided with an enlarged head 57 having at its outer end a circumferential flange Ella engaging the outer side of the frame member I [I while on the inner end of the head 51 a plate 58 is fixed thereto by means of a nut 59 screwed on the spindle and a pin 6!) extending through the plate and into the head and preventing relative rotation between the head and plate, said plate 58 engaging the inner side of the frame member El, and together with the circumferential flange lil'a on the outer end of the head preventing endwise movement of the spindle while allowing rotation thereof. The shaft 56 is provided with a circumferential flange El engaging the inner side of the frame member I 0, while a nut 62 screwed on the end of the shaft cooperates with the flange iii to clamp the shaft in fixed position in the frame member iii.

A gear 53 is keyed to the spindle 55 and meshes with the gear 25 associated with the Geneva wheel M. The ratio between the gear b3 and the gear 26 is such that for each complete revolution of the shaft i3 and each quarter of a revolution of the gear 24 and Geneva wheel 2i the gear 55 and the spindle 55 make two complete revolutions. Reference to Fig. 2 will clearly show that the spindle makes two revolutions for each revolution of the shaft it but that the revolutions of the spindle take place during one quarter of the complete revolution of the shaft l3.

A table 6 is fixed to the spindle 55 and revolves therewith and said table is provided with a pin or fixed shaft 65 upon which a spool of cord 66 is mounted. The free end of the cord 66 passes through a guiding member Bl fixed to the spindle 55 and revolving therewith and having a springpressed plunger 68 to maintain tension on the cord. The cord passes through a guiding sleeve 59 and through aligned openings in the plate 58 and the head 5'l of the spindle, as clearly illustrated in Fig. 1, and thence over to adjacent the pins 36.

The frame member H on its outer side is provided with a fixed pin or shaft Hi on which is mounted a spool of cord '6 i, which has its free end extending through a guiding and tensioning member '52 mounted on the outer side of the frame member iii and similar to the member 57!. The free end of the cord ll passes through a bore or passage formed in the shaft 56 and extends to the outer side of the frame memberv i l, whence it can be secured to the end of the valve stem 55 carried by the member 36. g

The operation of the machine is as follows:

With the member S lin its most left-hand position, at which time the left-hand end of the shaft 30 is at its maximum distance from the inner end of the recess Ma and the pin 38b of the member 38 engages the cam it?) at its lowest point, a valve stem 35 is positioned in the recess 34b of the member 34 and the cord H is passed through the shaft 55 and its free end tied around the valve stem adjacent but spaced from the end of the latter, as indicated at Na in Fig. 1. The free end of the cord 65 is passed through the head 5? of the spindle 55 and back of the cord H, such free end either being held by the operator or being tied to a convenient part of the machine. At this time it will be understood that the

plungers

48 and 53 are withdrawn from engagement with the members 4E! and 33 and that the lever 50 is in engagement with a low point on the cam 55.

It will be further understood that the pin l9 on the disk i3 is in such position that it is ready to enter one of the slots Zia of the Geneva Wheel 2 i, as shown in Fig. 2. The machine now being set in operation, the rotation of the shaft is in the direction of the arrows rotates the disk i8 and the pin E9 carried thereby enters the slot Zia in the Geneva wheel iii and imparts a quarter turn thereto and to the gear 2 in the direction indicated by the arrow in Fig. 2.

As previously explained, the ratio between the gear 2d and the gear 53 is such that the latter will make two complete revolutions for each quarter turn of the former, so that it will be seen the spindle 55 will be given two complete revolutions since the gear 63 is keyed thereto. The two complete revolutions of the spindle 55 wraps or turns the extending free end of the cord 58 twice around the cord 'l I, as will be clearly understood, it being remembered that the table 65 and the guiding and tensioning member 6? rotate with the spindle. When the pin i9 leaves the slot 2 la in the Geneva wheel 2i, there is a short moment when neither the shaft 30 nor the spindle 55 is driven, as india quarter turn in the direction indicated by the arrow in Fig. 2. At this time the Geneva wheel 29 and, of course, the spindle 55 are idle. The quarter turn imparted to the Geneva wheel 2Q also rotates the gear 25 fixed on the shaft 22 through a quarter turn, and since said gear is in mesh with the gear 25 and the latter makes one complete revolution for each quarter revolution of the gear 25, the bevel gears 28 and 29 will each be rotated one turn, as will the shaft 30, and due to the frictional driving connection between the shaft 35, and the member 34 the latter will also rotate one turn, it being noted that the member 38 moves with the member 34 as it is keyed thereto and that the pawl 5i will merely click over the ratchet tooth 38a.

It will also be remembered that due to the frictional driving connection between the member 34 and the cam member it) the latter will rotate one turn with the member 3a. The complete revolution of the member 35 results in the cord H being wrapped around the most outwardly extending pin 35, that is, the pin which has its inner end in engagement with the high point of the cam 58c, and

Wheel 28 and driving movement to the shaft 38 ceases, it being remembered that the spindle 55 is also idle at this time. The indexing period, as indicated by the curved arrow line marked indexing time in Fig. 2, commences simultaneously with the ceasing of the driving movement to the shaft 39 and the high points of the cams and ll force the plungers i8 and 53 outwardly and bring the conical heads thereof into the conical recesses in the cam member ll] and the member 33, respectively. The plunger l8 thus locks the cam member 4i against rotation while the plunger 53 looks the shaft 38 against rotation. As the Jam member it and the shaft are locked, the high point of the cam 45 comes into engagement with the lever 59 and rocks the same in a direction such that the pawl indexes the member the distance of one ratchet tooth, and since said member 38 is keyed to the member the latter is also indexed a distance of one ratchet tooth or the di tance between adjacent pins It will be understood that, during the indexing of the member 38 and the member a slippage takes place between the member 34 and the shaft 39 and the cam member which are only frictionally operatively connected thereto. The in.- dexing of the member (it brings the next pin 36 into position so that its inner end is in engagement with the high point of the cam itc on the cam member id and the opposite end of such pin is now in the most outward position with respect to the corresponding ends of the other pins. It will be understood that the purpose of having the lefthand end of said pin in its most outward position is to enable the cord ii to be wrapped around it and the valve stem without contacting the corresponding ends of the other pins 35 which have their right-hand ends in engagement with the low points on the cam lee.

The indexing of the member .38 progressively moves the pin 3% along the cam 4% from the lowermost point of the cam toward the highest point thereof, with the result that the member 34 and the member 38 are moved slightly toward the right, as viewed in the drawings, and against the action of the spring 300.. As soon as the indexing has been completed, the conical heads on the plungers $8 and 53 move out or" the conical recesses Md and 33a while the pin it on the disk it enters another of the slots 25a of the Geneva wheel 2i to impart to the disk and to the gear 24 a quarter turn to again wrap the cord 8E3 twice around the cord H as has been previously explained.

From now on the operation is repeated automatically in the same sequence until the cord H has been wrapped around each of the pins 36 and the valve stem to provide a plurality of radially extending loops and the cord has made two turns around the cord ll adjacent each of the pins 36, that is, around the outer end of each loop.

It will be seen that due to the indexing of th member 33 the pin 36b carried thereby gradually travels from the low point of the cam 4-51; to the high point thereof and moves the member it axially toward the right as viewed in Fig. the result being that the turns of the cord ii about the valve stem gradually progress from the illustrated position in Fig. 1 toward the end of the valve stem. When the operation has been completed, the machine is stopped, cord 56 severed adjacent the head and the ends thereof tied a knot, as indicated at "lid in Fig. 5.

Similarly, the end of the cord ii is severed adjacent the head 57 and the end thereof which is connected to the base is looped around the valve stem and tied as indicated at lib. The operator now removes the valve stem from the member 34 and the outer ends of the loops of the cord base which have been fashioned on the stem from the pins 36. The character of the base and the manner in which it is applied to a tire tube is clearly illustrated and described in the abovementioned co-pending application of A. E. Bronson and William F. Golf, Serial No. 56,220, and need not be further referred to herein.

It will be seen that a machine embodying the present invention constitutes an efficient and semi-automatic means for fashioning the cord base directly on the end of the valve stem. It will be further noted that such a machine is composed of a relatively few number of parts, may be readily assembled and operated, and will enable valve stems to be economically manufactured.

Although a preferred embodiment of the invention has been illustrated and described herein, it should be understood that the invention is susceptible of various modifications and adaptations within the scope of the appended claims.

Having thus described my invention, I claim:

1. A machine for fashioning a cord base directly on the end of a valve stem comprising means for forming a plurality of radially extending cord loops having their inner ends Wrapped about the valve stem, and means for interconnecting the outer ends of said loops with a circumferentially extending cord turned a plurality of times about the outer end of each loop.

2. A machine for fashioning a cord base directly on the end of a valve stem comprising means for forming from a continuous cord a plurality of radially extending loops having their inner ends wrapped about the valve stem, and means for interconnecting the outer ends of said loops with a circumferentially extending continuous cord turned a plurality of times about the outer end of each loop.

3. A machine for fashioning a cord base directly on the end of a valve stem comprising a valve stem holding member having a plurality of circumferentially spaced pins arranged concentrically with respect to the stern, means for intermittently rotating said member through a complete revolution to successively wrap a cord about the valve stem and each of said pins to form a plurality of radially extending loops, and means for indexing said member one pin space intermediate each rotation of the member.

2. A machine for fashioning a cord base directly on the end of a valve stem comprising a valve stem holding member having a plurality of circumferentially spaced pins arranged concentrically with respect to the stem, means for interm ttently rotating said member through a complete revolution to successively wrap a cord about the valve stem and each of said pins to form a plurality of radially extending loops, means for indexing said member one pin space intermediate each rotation thereof, and means for gradually moving said member axially endwise during the operation of the machine.

5. A machine for fashioning a cord base directly on the end of a valve stem comprising valve stem holding member having a plurality of circumferentially spaced pins arranged concentrically with respect to the stem, means for intermittently rotating said member through a,

complete revolution to successively wrap a cord about the valve stem and each of said pins to form a plurality of radially extending loops, means for turning a second cord a plurality of times about each loop adjacent each pin, and means for indexing said member one pin space intermediate each rotation thereof.

6. A machine for fashioning a cord base directly on the end of a valve stem comprising a valve stem holding member having a plurality of circumferentially spaced slidable pins arranged concentrically with respect to the stem, means for projecting one of said pins beyond the end of said member farther than the remainder of said pins, means for intermittently rotating said member through a complete revolution to successively wrap a cord about the valve stem and each of said pins to form a plurality of radially extending loops, and means for indexing said member one pin space intermediate each rotation thereof to progressively cause each pin to be projected beyond the end of the member farther than the other pins.

7. A machine for fashioning a cord base directly on the end of a valve stem comprising a valve stem holding member having a plurality of circumferentially spaced slidable pins arranged concentrically with respect to the stem, means for projecting one of the pins beyond the end of said member farther than the remainder of the pins, means for intermittently rotating said member through a complete revolution to successively wrap a cord about the valve stem and each of said pins, means for indexing said member one pin space intermediate each rotation thereof to progressively bring each pin into position where it will be projected the farthest beyond the end of the member, and means for gradually moving said member endwise during the operation of the machine.

8. A machine for fashioning a cord base directly on the end of a valve stem comprising a valve stem holding member having a plurality of circumferentially spaced slidable pins arranged concentrically with respect to the stem, means for projecting one of said pins beyond the end of the member farther than the remainder of the pins, means for intermittently rotating said member through a complete revolution to successively wrap a cord about the valve stem and each of said pins to form a plurality of radially extending loops, means for turning a second cord a plurality of times about each loop adjacent each pin, and means for indexing said member one pin space intermediate each rotation thereof to progressively bring the pins into a position where each pin will project farther beyond the end of the member than do the remainder of the pins.

9. A machine for fashioning a cord base directly on the end of a valve stem comprising a valve stem holding member having a plurality of circumferentially spaced slidable pins arranged concentrically with respect to the stem, means for projecting one of said pins farther beyond the end of said member than the remainder of the pins, means for intermittently rotating said member through a complete revolution to successively wrap a cord about the valve stem and each of said pins to form a plurality of radially extending loops, means for turning a second cord a plurality of times about each loop adjacent each pin, means for indexing said member one pin space intermediate each rotation of the member and each operation of said last named means to progressively move the pins into position where each will be projected farther than the other pins, and means for gradually moving said member endwise during the operation of the machine.

10. A machine for fashioning a cord base directly on the end of a valve stem comprising a valve stem holding member having a plurality of circumferentially spaced slidable pins arranged concentrically with respect to the stem, a cam normally rotatable with said member but capable of rotation relative thereto engaging the ends of said pins and acting to project the opposite end of one of said pins axially beyond said member a greater distance than the ends of the remainder of the pins are projected, means for intermittently rotating said member and cam through a complete revolution to successively wrap a cord about the valve stem and each of said pins to form a plurality of radially extending loops, and means for indexing said member relative to said cam and intermediate each rotation of the member and cam one pin space to progressively project each pin a greater distance than the remainder of the pins.

11. A machine for fashioning a cord base directly on the end of a valve stem comprising a valve stem holding member having a plurality of circumferentially spaced pins arranged concentrically with respect to the stem, means for intermittently rotating said member through a complete revolution to successively wrap a cord about the valve stem and each of said pins, means for indexing said member one pin space intermediate each rotation thereof, and means for gradually moving said member endwise during the operation of the machine and including a cam, and a cooperating abutment carried by said member and rotatable therewith.

12. A machine for fashioning a cord base directly on the end of a valve stem comprising a valve stem holding member having a plurality of circumferentially spaced pins arranged concentrically with respect to the stem, means for intermittently rotating said member through a complete revolution to successively wrap a cord about the valve stem and each of said pins, means for indexing said member one pin space intermediate each rotation thereof and including a pawl and a ratchet rotatable with said member, and means for gradually moving said member endwise during the operation of the machine and including a cam, and an abutment rotatable with said member.

13. A machine for fashioning a cord base directly on the end of a valve stem comprising a valve stem holding member having a plurality of circumferentially spaced pins arranged concentrically with respect to the stem, means for intermittently rotating said member through a complete revolution to successively wrap a cord about the valve stem and each of said pins to form a plurality of radially extending loops, means for turning a second cord a plurality of times about each loop adjacent each pin, means for indexing said member one pin space intermediate each rotation thereof and when said last named means is inoperative, and means for gradually moving said member endwise during the operation of the machine and including a cam, and a cooperating abutment carried by said memher and rotatable therewith.

14. A machine for fashioning a cord base directly on the end of a valve stem comprising a valve stem holding member having a plurality of circumferentially spaced pins arranged concentrically with respect to the stem, means for intermittently rotating said member through a complete revolution to successively wrap a cord about the valve stem and each of said pins to form a plurality of radially extending loops, means for turning a second cord a plurality of times about each loop adjacent each pin, means for indexing said member one pin space intermediate each rotation thereof and when said last named means is inoperative and including a pawl and a ratchet rotatable with said member, and means for gradually moving said member endwise during the operation of the machine and including a cam and an abutment rotatable with said member.

15. A machine for fashioning a cord base directly on the end of a valve stem comprising a valve stem holding member having a plurality of circumferentially spaced slidable pins arranged concentrically with respect to the stem, means for projecting one of said pins farther beyond the end of said member than the remainder of the pins and including a cam normally rotatable with said member but capable of rotation relative thereto and engaging the ends of said pins, means for intermittently rotating said member through a complete revolution to successively wrap a cord about the valve stem and each of said pins to form a plurality of radially extending loops, means for turning a second cord a plurality of times about each loop adjacent each pin, means for indexing said member relative to said cam one pin space intermediate each rotation of the member and when said last named means is idle to progressively move the pins into position where each will be projected farther than the other pins, said indexing means including a pawl and a ratchet rotatable with said member, and means for gradually moving said member endwise during the operation of the machine and including a cam and an abutment rotatable with said member.

WILLIAM F. GOFF. EWALD F. TOBOLD.