US2742851A

US2742851A - Machine for tying wire coils

Info

Publication number: US2742851A
Application number: US337851A
Authority: US
Inventors: George R Fryer
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-02-19
Filing date: 1953-02-19
Publication date: 1956-04-24
Anticipated expiration: 1973-04-24

Description

April 24, 1956 G. R. FRYER v MACHINE FOR TYING WIRE COILS 3 Sheets-Sheet l j nventor (Ittornegs Filed Feb. 19. 1955 April 24, 1956 G. R. FRYER MACHINE FOR TYING WIRE coILs 5 Sheets-Sheet 2 Flled Feb. 19, 1953 Cittornegs April 24, 1956 Filed Feb. 19, 1953 G. R. FRYER MACHINE Foa TYING WIRE coILs g ff.

3 Sheets-Sheet 3 nventor Gttornegs States .Patent 2,742,851 .K MACHINE FOR TYING WIRE COILS l i l George R. Fryer, Ansonia, Conn. y

Application February 19, 1953, Serial No. 337,851 I i 12 Claims. (cl. 10o- 4) This invention relates to a machine for tying wire coils, bundles of rods, pipe, wood and any similar articles, and has for an object to provide a simple and effective device for automatically tying these articles to prevent their loosening and uncoiling during subsequent handling operations.

With the foregoing and other objects in view, I have devised the construction illustrated in the accompanying drawing forming a part of this specification. It is, how# ever, to be understood the invention is not limited tothe specific details of construction and arrangement shown, butmay embody various changes and modifications within the scope of the invention.

In these drawings:

Fig. 1 is a partial front elevation and partial section of the device showing the parts in the position they occupy while the 'tying wire is being fed around the coil;

v Fig. y2 is 'a top plan view of the device; Fig. 3 is a bottom plan view;

Fig. 4 is a detail partial side view and section;

. Fig. Sis a wiring diagram;

Fig. 6' is a detail view of a guide for the wire;

Fig. 7y is a partial side elevation and partial section of portion-s of the device to illustrate its operation;

Figs. 8, 9 and 10 are views showing various steps in the tying operation;`

:. Fig. l1 is a plan view of a tied coil of wire;

Fig. l2 is'a plan view of one of the spinner arms, and Fig. 13'is a longitudinal section thereof.

'.-As'a wire leaves a drawing machine or rolling mill it is wound into a coil on the drum of a coiler. After the wire vis coiled the coil is carried onto a platform or a conveyor twhere one or more men wrap a tying wire around itfand twist its ends at one or more positions on the coil. Thisiisl a hand operation and takes considerable time and is expensive, and the men may or may not do a good job. This tying wire is `to keep the coil from unwinding as it is later-handled( It is an object of this device to put on this tying wire automatically to thus eliminate the hand operations and `do a better job. The tying of a wire coil as1described in this specification and claims is used fmerely 'as' an example'of one specific use of the device, as it is adapted for tying numerous other articles.V A coil of this'wire is indicated at 1, and as shown in Fig. 11 it is tied at `opposite sides by the tying wires 2 wrapped around the coil and their free ends twisted together. This device wraps the Wire around the coil and twists the free ends to complete the tying operation. If the coil 1 is tied on one side only, one of these devices will be used,

but if it is tied on both sides two of these devices wouldy table 4 to which the coil 1 is transferred from the coiler, either by a conveyor orgby hand, to a position over this device for the tying operation. On the top ofthe base or frame 3 are two pairs of pivot lugs 5 to which the right and left hand yokes -6 and7 are pivoted at 8. Each yoke has a lug 9 to which is pivoted at 10 a head or clevis 11 on a piston rod 12 in an air cylinder 13, each cylinder being pivoted at 14 between a pair of angleshaped depending trunnion brackets 15 mounted on the undersideof the frame or base 3, these piston rods passing through openings 16 in the frame. The yokes 6 and 7 each comprise an upright lower portion and quarter cylindrical upper

free end portions

17 and 18 respectively which come together at their free ends at the top, and one of them, as the portion 17, may have a V-shaped free edge 19 to seat in a correspondingly shaped groove or recess in the free end of portion 18 when they come to gether, as shown in Fig. 2, to keep them in alignment. One of the members carries a switch 20 including an operating member 21 so positioned as to be operated by the other member when the two

members

17 and 18 come together, for a purpose Lpresently to be described. These members come together around one side of the coil of wire 1, in this case the top side, as shown in Figs. 1 and 7, as a part of the tying operation. These two -yoke members 6 and 7 are normally retracted in the dotted line position, as shown in Fig. 7, below the table 4 and-may be moved upwardly through a slot or opening 22 provided in this table. As the free 'ends of the yokes are below the top of the table they do not interfere with the movement of the coil 1 onto this table. Located in a recess in 'this table is a plate 23 normally held a short distance above the level of the table by a suitable spring or other resilient means 23a, and when depressed voperating a special momentary contact switch 24 for a purpose presently to be described.

The pistons in the two cylinders 13 are operated by air pressure and are vcontrolled by a solenoid valve V25 shown in Fig. 3 and the wiring diagram of Fig. 5, with flexible pipe or

hose connections

26 and 27 leading to the upper and lower ends respectively of the cylinders 13. yThere is a suitable supply connection 28 to this valve as well as an exhaust connection 29. Operation of this valve, as will presently be described, to supply air pressure to the lower ends of the cylinders` 13,' will force their pistons and piston rods 12 upwardly to swing the yokes 6 and 7 upwardly from the dotted line positions of Fig. 7 to the upright full line positions of Fig. 7 `and Figs. l and 2, to bring the curved upper end portions 17 and 18to a position about one side of the coil of wire 1, and conversely feeding air from the valve 25' to the Vupper ends of these cylinders will force their pistonsdownwardly and swing the yokes 6 and 7 outwardly and downwardly in opposite directions from their fullflinevpositions of. Figs. l and 7 to the retracted or dotted position of Fig. 7. The

connections

26 and 27 to ,the cylinders are either eXible pipe or hose connections because of the swingingy movements of these cylinders 13 about their pivots 14. Y

Mounted on the under side of the base or frame 3 is a feeding means for feeding the tying wire to the tying position about the coil of wire 1. --Thisj comprises a block; 30 mounted on the under side of base 3 by` any suitabley means,v such, for example, as the screws v31, and mounted in this block are wire feed wheels or

' rolls

32 and 33 located above a guide tube 34 throughk which the binding wire 35 is fed from a suitable supply coil (not shown). This wire passes up through the tube 34, between the two

lrolls

32 and 33, through guide passage 36 in the block, and through a hardened cut-oit quilll 37.mounted,in the frame, and atfone side of this quill there is a cut-oli knife 38 pivoted on the frame at 3,9 (Fig. 2) and normally held in retracted position at one side of the passage in the quill 37 by a spring 40. The yoke 7 is provided with a lug 41 (Fig. 1) so positioned that when this yoke is swung to the retracted or dotted line position of Fig. 7, this lug will hit the outer edge 42 of the cutot`f blade 38 and force it across the exit or upper end of the guide quill 37 and cooperate therewith to cut olf the wire. The feed wheels or

rolls

32 and 33 are 4operated by the electric motor 71 through a reducing gear box 72 to which it is connected by the coupling 73. The output shaft from this reducing gear box is shown at 74 connected by the couplings 75 to the feed wheel 33. These wheels may be of any suitable type, the wheel or roll 33 being shownI as provided with a knurled or roughened gripping surface 33a, while the wheel 32 is provided with guide groove 32a. The motor 71 and the reducing gearbox 72 are mounted on the frame or base 3 by any suitable means, such, for example, as the depending bracket 76.

Mounted above the base or frame 3 and under the open space between the two yokes 6 and 7 is the spinner 43. This spinner comprises two

arms

44 and 45 pivoted together at 46 on the forked head 47 of a spinner bar or shaft 48 mounted to rotate in the ball bearings 49 and to project below them in a guide block or bearing bracket is mounted another supporting bracket 53 for a spinning cylinder 54 enclosing a piston (not shown), and the piston rod 55 of this cylinder is connected by the tie plate 56` to the outer end of the rack 52, as shown at 56a. This tie plate has an extension forming a cam plate 57 provided with an inclinded cam surface 58, and secured i to the other end of the rack 52, asiindicated at 59, is a second cam platel 60 having an inclinded cam surface 61 (Fig. 1).' Mounted in each spinner arm, as shown more in detail in Figs. l2 and 13, is a clamping rod 62, each provided with a transverse opening 63 normally in alignment with the wire guide openings 64 in

thc spinner arms

44 and 45 adjacent their outer ends. Each rod 62 has at its opposite end an inclined cam surface 65, and these cam surfaces engage the opposite sides of a head 66 on a push rod 67, the upper surface of this head being rounded as indicated at 68, to engage the cam surfaces 65. The rod 67 is mounted to slide up and down in the spinner shaft 48, and it projects from the lower end of this shaft into alignment with the path of movement of the two

cam surfaces

58 and 61 carried by the reciprocating rack 52. Mounted in each

spinner arm

44 and 45 is a coil spring 69 about each of the rods 62, acting against the enlargement 70 on the rod so as to tend to force cach of these rods inwardly and hold the cam surfaces 65 against the curved surface 68. When the rod 67 is in the upper position the head 66 acting on the inclined surfaces 65 pushes the rods 62 outwardly against the action of the springs 69 so that the openings 63 in the rods 62 are in alignment with theA openings 64 in the respective spinner arms, and therefore in this position the tire wire is free to go through them, but when the push rod 67 s allowed to fall, the two clamping rods 62 are forced inwardly toward the pivot 46 of the spinner arms by the springs 69. This shifts the openings63 in the clamping rods 62 inwardly partly out of alignment with the openings 64 in the spinner arms and will clamp the opposite ends of the wire 35 against the sides of the openings 64, as shown in Fig. 13, and thus will firmly grip the free ends of this wire.

The

spinner arms

44 and 45 are free to swing upwardly about the pivot 46, but their downward movement is limited by the shoulder 77 on the head 47 when they are in substantially the horizontal position, and they are normally held in this position by the coil springs 78 secured one to the under side of each arm and the head 47, as shown in Figs. l, 8 and 9. The operation of the piston in the spinner cylinder 54 is controlled by the four-way plunger-operated valve 79 mounted on the base 3. This is a standard type of valve including a projecting plunger 80 operating a slidable valve element controlling the supply of air to the opposite ends of the cylinder 54 to shift the piston therein in opposite directions in a well known manner, the movable valve member being normally retracted and held in the retracted position by a suitable spring 81. The pipe connections from this valve to the upper and lower ends of the cylinder 54 are shown at 82 and 83 respectively (but broken to simplify the drawing) and the supply connection is shown at 84 and the exhaust connection at 85.

Mounted on the base 3 immediately below the right hand arm 45 of the spinner is a control switch 86 (Figs. l and 5) provided with an inclined trip plate 87 in alignnient with the wire guide passage 64 at the free end of this arm, so that as the free end of the wire indicated at 35a passes down through this opening it will engage this plate 87 and trip the switch, for a purpose presently to be described. As the plate 87 is inclined the free end of the wire when it is forced against it will be bent laterally, as shown in Fig. l, and will wedge the end of the wire against the side of the opening 64 in the spinner arm 45, and will grip or temporarily hold it, for a purpose presently to be described.

To assist in guiding the wire, the inner surfaces or edges of the two yokes 6 and 7 are each provided with a guide channel 88 for the wire, and when the yokes are in the upright or closed position, as shown in Fig. l, the upper free ends of these channels are in alignment and their lower ends are over and in alignment with the openings 64 at the outer ends of the

spinner arms

44 and 45, and to insure that these openings in these arms are in alignment with the lower ends of the guide channels 88, when in this position, an adjustable stop 89,` as shown in Fig. 3, is provided at the outer end of the piston rod 55 of the spinner cylinder 54 mounted in a suitable lug or bracket 90 on the under side of the base 3. This is mounted for adjustment so that when the end of the rod 55 engages it it is stopped in the correct position to bring the guide openings 54 in the spinner arms; into alignment with its lower entrance ends to the wire guide channels 88 in the yokes 6 and 7, and this adjustable stop may be secured in any adjustable position by a suitable lock nut 91. The rod 55 and rack 52 are shown in their retracted positions in Fig. 3. i

On the open side of each of the guide channels 88, particularly on the open side of the upright portion of the channel in the right hand yoke 6, is provided retaining or guide means to keep the free end of the wire in the channel as it is fed through this channel by the wire feed means, and particularly is this desirable on the right hand yoke 6 because the free end of the wire is bent as it passes around the curved free end portions` 17 and 18 of the yokes and would tend to come out of the channel 88 of the yoke 6. The guide or retaining means comprises an angularly shaped sheet metal member 92 one side of which 93 overlaps the open side of the channel 88, and the other flange or side 94 overlaps a side wall of the yoke and is free to slide and pivot outwardly on supporting pins 95 against springs 96 which hold the device in the normal position over the channel 88, as shown in Figs. l and 6. The upper end of the inner flange 93 is inclined as shown at 97 over the channel 88 so that as the yoke swings outwardly to the retracted position, to withdraw the yoke from the wire, the wire engages this inclined edge 97 and swings or slides the guide 92 outwardly away from the channel and frees the wire to permit it to pass out of the channel. If desired, the same device may be used on the other yoke 7, as shown in Fig. l, but it is not as necessary onthis yoke as on yoke 6.' i

The operation is as follows:

The device may be located in any desired position, but normally would be located under or over a conveyor table near the supply of the articles to be tied, with the yokes 6 and 7 in the retracted lower or dotted line positions a's shown in Fig. 7. As the coil of wire 1 is shifted and comes up to the bench, either by a conveyor or by hand, to the normal position to be secured by the wires 2, it depresses the plate 23 and trips the momentary contactswitch 24, as indicated in Fig. 5. This closes the circuit through the electric relay 98, and a secondary or sustaining circuit 99 controlled by switch 86 holds this relay closed. This relay energizes the solenoid in the solenoid valve 25 to thus supply air pressure to the lower ends of the cylinders 13 and force the pistons in these cylinders upwardly.` As these pistons move upwardly they swing the two yokes 6 and 7 upwardly to the full line positions of Figs. 1 and 7 to bring their upper

curved end portions

17 and 18 around the coil of wire 1. As the free ends of the two yokes come together they operate the switch 20 and this starts the wire feed motor 71 operating. This motor through the feed rolls 32 and 33 feeds the wire 35 from a supply coil (not shown) up through the tube 34 and quill 37, and through the opening 64 in the left hand spinner arm 44. The wire continues up through the guide channel 88 of the left hand yoke 7 around over the coil of wire 1 and down through the guide channel 88 in the right hand yoke 6, and through the opening 64 in the other spinner arm 45, and as it passes down through this opening it hits the plate 87 of the switch 86 and is bent laterally as indicated at 35a in Fig. 1 to wedge this free portion of the wire against the side of the opening 64 in the spinner arm 45. Also as this free end of the wire hits the vplate 87 -it trips the switch 86 and opens the sustaining circuit to the relay 98. This opens the circuit to the wire feed motor 71 and the feed of the wire is stopped. It also deenergizes the solenoid controlled airv valve 25 which permits air to enter the upper ends of the cylinders 13 and exhaust from the lower ends of these cylinders. This air forces the piston rods 12 downwardly and swings the two yokes 6 and 7 outwardly and downwardly to the retracted Vdotted line position of Fig.l7. In this movement the wire 35 is retained about the coil 1, the guides 92 yielding to permit the wire to remain about the wire coil and pass outwardly from the guide grooves 88 while the yokes move outwardly, the free end of the wire being retained by the laterally bent end portion 35a in the right hand spinner arm 45, and the opposite portion of the wire being still retained in the guide quill 37. As the yokes reach their outer or lower positions the lug y41 on the yoke 7 engages the outer side 42 of the cut- Y off blade 38 and swings its cutting edge across the end of the cut-oil? quill 37 to cooperate therewith to cut the wire. At thesame time, the yoke 7 engages the plunger 80 of the four-way valve 79, as shown in dotted lines Fig. 1, and forces this plunger downwardly to supply air to the upper end of the spinner cylinder 54, as Viewed in Fig. 3, the piston rod 55 and rack 52 being shown in the retracted position in this figure. This forces the piston downwardly as viewed in Fig. 3, carrying with it the rod 55 and the rack 52, and as soon as the rack starts to move it carries with it the cam plate 60, shifting the cam surface 61 on this plate from under the plunger rod 67, permitting this rod to drop and release the two clamping rods 62 in the spinner arms. This permits the springs 69 to shift these rods 62 to clamp the wire in the openings 64 in the two arms, as shown in Fig. 13. Also, continued movement of the rack 52 operating through the pinion gear 51 rotates the shaft 48 and the

spinner arms

44 and 45. As these arms are now firmly gripping the free ends of the wire which is lying over the coil of wire 1, as shown in Fig. 8, rotation of these arms overlaps the free ends of the wire and draws and wraps it about the coil 1, as shown in Figs. 9 and 10.

6 As the ends of the wire shorten up during this twisting operation the

spinner arms

44 and 45 are free to move upwardly about the pivot 46 against the action of the springs 78. When the rack 52 reaches the end of its inward movement and has completed the twisting of the free ends of the wire, asindicated in Fig. l0, the inclined surface 58 on the cam 57 engages the lower end of the plunger rod 67 and shifts it upwardly so thatlthe curved surface on its head acting against the inclined surfaces 65 on the inner ends of the clamping rods 62 shift these rods outwardly to release the free ends of the wire 35, and the

spinner arms

44 and 45, being released, -are immediately returned by their springs 78 to their horizontal position. The operation of drawing and tying the wire about the coil of wire 1 is now completed, and the yokes 6 and 7 are in their retracted or lower positions preparatory to another tying operation. Removal of the coil lfrom the plate 23 releases this plate so that it is in position to trip the momentary contact switch 24 to repeat these operations when the next coil is brought to the tying position. However, the rack 52 has not yet been retracted to the position shown in Fig. 3, but as soon as the switch 24 is tripped for the next operation to operate the relay and energize the solenoid valve 25 and start the cylinders 13 operating to swing the yokes upwardly to the tying position, release of the plunger 80 of the Valve 79 will immediately permit this valve to be shifted by the spring 81 to exhaust air the lower end of this cylinder to shift the rack 52 outwardly, and by the time the yokes 6 and 7 have reached their closed or full line position and before operation of the switch 2i) to start the wire feed motor and the wire feed operated thereby, the rack 52 has been shifted back t0 its retracted position, as shown in full lines Fig. 3, and the

spinner arms

44 and 45 have been returned to their normal or retracted position with their wire guide openings 64 in alignment with the lower end of the guide channels 88 in the yokes, and imposition for the next feeding of the wire to repeat the tying operation as de.- scribed.

Having thus set forth the nature of my invention, I claim:

1. A machine for tying wire coils and the like cornprising a pair of opposed pivoted yokes each including a curved portion to embrace one side of a wire coil, means for shifting the yokes between a retracted open position away from the coil and a closed position about the coil, each yoke being provided with an open wire guide channel in its inner face, means for feeding a tie wire through the channel about the coil, control means for the-wire feeding means operated by closing movement of the yokes to start the feeding means, control means operated by the free end of the wire as it reaches a given position to stop operation of the feeding means, spinner means including means to grip the ends of the wire about the coil, and means for rotating the gripping means to draw the wire about the coil and twist its free ends together.

2. A machine for tying wire coils and the like comprising a pair of opposed pivoted yokes each including a curved portion to embrace one side of va wire coil, means for shifting the yokes between a retracted open position away from the coil and a closed position about the coil, each yoke being provided with an open wire guide channel in its inner face, means for feeding a tie wire through the channel about the coil, spinner means including a shaft, a pair of arms pivoted on the shaft and extending in opposite directions therefrom, means adjacent the free ends of the arms to grip the free ends of the wire about the coil, and means for rotating the shaft and arms tov overlap the ends of the wire and twist them together.

y3. A machine for tying wire coils and the like comprising a base, a pair of opposed Vyokes each including a curved portion to embrace one side of a wire coil, means pivotally mounting the yokes on the base to swing to and from the coil embracing position, each yoke being provided with an open sided wire guide channel in its inner edge, spinner means comprising a rotatable shaft, a pair of arms pivotally mounted on the shaft and extending in opposite directions therefrom, each arm being provided with wire gripping means adjacent its free end normally in alignment with opposite ends of the guide channel, means for feeding a wire through the channel about the coil with its free end portions in the gripping means, and means for rotating the shaft and arms to overlap the ends of the wire and twist them together.

4. A machine for tying wire coils and the like comprising a base, a pair of opposed yokes each including a curved portion to embrace one side of a wire coil, means pivotally mounting the yokes on the base to swing to and from the coil embracing position, each yoke being provided with an open sided wire guide channel in its inner edge, spinner means comprising a rotatable shaft, gripping means on the shaft to grip the free ends of a wire in said channel, means for feeding a wire through said channel to position the wire about the coil with its free end in said gripping means, control means operated by the free end of the wire as it reaches a given position to stop operation of the wire feeding means, and means for rotating the shaft to overlap the ends of the wire and twist them together.

5. A machine for tying wire coils and the like comprising a base, a pair of opposed yokes each including a curved portion to embrace one side of a wire coil, means pivotally mounting the yokes on the base to swing to and from the coil embracing position, each yoke being provided with an open sided wire guide channel in its inner edge and having open ends at the inner ends of the yokes, a spinner means comprising a rotatable shaft, a pair of arms pivotally mounted on the shaft and extending in opposite directions therefrom, each arm being provided with a wire gripping means adjacent its outer end normally in alignment with the open ends of the channel, means for feeding a wire through one gripping means and then through the channel to position it about the coil and its free end into the other gripping means, means to swing the yokes to the open position away from the coil after the wire is so positioned, and means for then rotating the shaft and the arms to overlap the ends of the wire and twist them together.

6. A machine for tying wire coils and the like comprising a base, a pair of opposed yokes each including a curved portion to embrace one side of a wire coil, means pivotally mounting the yokes on the base to swing to and from the coil embracing position, each yoke being provided with an open sided wire guide channel in its inner edge, spinner means comprising a rotatable shaft, a pair of arms pivotally mounted on the shaft and extending in opposite directions therefrom, each arm being provided with releasable wire gripping means adjacent its free end normally in alignment with the opposite ends of the guide channel, means for releasing the gripping means and retaining them in the released position, means for feeding a wire through the gripping means while in the released position and through the channel to position it about the coil, means to then operate the gripping means to grip the ends of the wire, means to rotate the shaft and arms whilegripping the wire to overlap its ends and twist them together, and means operated by the shaft rotating means to then release the gripping means.

7. A machine for tying wire coils and the like comprising a base, a pair of opposed yokes each including a curved free end portion to embrace one side of the coil, means pivotally mounting the yokes on one side of the base to swing to and from the coil embracing position, each yoke being provided with an open sided guide channel linits inner edge, air pressure cylinders mounted on the opposite side of the base and including pistons connected to the yokes for operating them, spinner means including a rotatable shaft, a pair of arms pivoted to the shaft and extending laterally therefrom in opposite directions, the arms being provided with openings adjacent their free ends in alignment with the entrance to the channels in the yokes when the yokes are in the closed position about the coil, shiftable wire gripping means adapted to grip the wire in said openings, feeding means mounted on the base to feed a wire through the opening in one arm, pass it about the coil in the channels in the yokes and through the opening in the other arm, movable means connected with the shaft to rotate the shaft to wrap the ends of the wire around each other and twist them together, means controlled by the initial movement of said latter means to shift the gripping means in the arms to grip the free ends of the wire, and means operated by the final movement of the shaft operating means to release the wire gripping means.

8. A machine for tying wire coils and the like comprising a pair of opposed pivoted yokes each including a curved portion to embrace one side of a wire coil, means for shifting the yokes between a retracted open position away 'from the coil and a closed position about the coil, each yoke being provided with an open wire guide channel in its inner face, means for feeding a tie wire through the channels about the coil, a retaining plate over the open side of the channel in one yoke and yieldable as the yoke is shifted away from the coil to permit the wire to pass from the channel and remain about the coil, resilient means tending to return the plate to its normal position over the channel, control means for the wire feeding means operated by closing movement of the yokes to start the feeding means, control means operated by the free end of the wire as it reaches a given position to stop operation of the feeding means, spinner means including means to grip the ends of the wire about the coil, means for rotating the gripping means to overlap the ends of the wire and twist them together, and control means for the spinner means operated by movement of the yokes to the retracted position.

9. A machine for tying wire coils and the like comprising a pair of opposed pivoted yokes each including a curved portion to embrace one side of a wire coil, means for shifting the yokes between a retracted open position away from the coil and a closed position about the coil, each yoke being provided with an open wire guide channel in its inner face, electrically operated means for feeding a tie wire through the channels about the coil, a switch carried by one yoke and operated by the other as they come together about the coil to control operation of said feeding means, air pressure cylinders including pistons for operating the yokes, electrically operated control means for said cylinders, spinner means including means to grip the ends of the wire about the coils and normally in position at the open ends of said channels when the yokes are in the closed position, a switch controlling said electrically operated means for the cylinders located at the open end of one channel to be tripped by the free end of the wire as it is projected from this channel, means to rotate the spinner means to wrap the ends of the wires about each other and twist them ytogether including an air pressure cylinder, and a valve for controlling said latter cylinder located to be operated by one of the yokes as it reaches its retracted position.

l0. A machine for tying wire coils and the like comprising a pair of opposed pivoted yokes each including a curved free end portion to be positioned about one side of the coil, each yoke being provided with an open wire guide channel in its inner edge, means for shifting the yokes to and from the closed position about the coil, means for feeding a wire to the channels of the closed yokes, control means for the feeding means operated by closing movement of the yokes to start the feeding means, control means operated by the Free end of the wire as it leaves the channels to stop operation ofthe feeding means, spinner means including means to grip the free ends of the wires, means for rotating the spinner means to overlap the free ends of the wires to twist them together, and control means for the spinner operating means controlled by movement of one of the yokes to its open position.

11. A machine for tying wire coils and the like comprising a pair of opposed pivoted yokes each including a curved portion to embrace one side of a wire coil, means for shifting the yokes between a retracted open position away from the coil and a closed position about the coil, said yokes being provided with guide means to direct a tie wire about the coil when the yokes `are in the closed position, means for feeding a tie wire through said guide means to place it about the coil, spinner means including means to grip the ends of the wire about the coil, means for rotating the gripping means to overlap the ends of the wire and twist them together, and means for controlling the wire gripping means operated by the means for rotating said gripping means.

12. A machine for tying wire coils and the like comprising a pair of opposed pivoted yokes each including a curved portion to embrace one side of a wire coil, means for shifting the yokes between a retracted open position away from the coil and a closed position about the coil, said yokes being provided with guide means to direct a tie wire about the coil when the yokes are in `:he closed position, feeding means for passing a tie wire through said guide means to place it about the coil, spinner means including a shaft, a pair of arms pivoted on the shaft and extending in opposite directions therefrom, means adjacent the free ends of the arms to grip the free ends or" the wire about the coil, and means for rotating the shaft and arms to overlap the ends of the wire and twist them together.

References Cited in the tile of this patent UNITED STATES PATENTS 74,407 Myers Feb. 1l, 1868 1,261,589 Mogan et al. Apr. 2, 1918 2,655,097 Fous et al. Oct. 13, 1953 FOREIGN PATENTS 470,138 Germany Ian. 9, 1929