US2963051A - Apparatus for winding wire around terminals - Google Patents

Description

Dec. 6, 1960 Filed Dec. 20, 1957 w. P. SHAW ET AL 2,963,051

APPARATUS FOR WINDING WIRE AROUND TERMINALS 6 She ets-Sheet 1 INVENTORS Wwbterl? J'lzww M Robert L. Jm iqe BY/JW/ ATTORNEYS 1960 w. P. SHAW ErAL 2,963,051

APPARATUS FOR WINDING WIRE AROUND TERMINALS Filed D60. 20, 1957 6 Sheets-Sheet 2 INVENTORS 'WaZZ'erP. Slum! afl Raberfil. Jzugqe BY I 7? ATTORNEYS Dgc. 6, 1960 w. P. SHAW EI'AL APPARATUS FOR WINDING WIRE AROUND TERMINALS Filed Dec. 20, 1957 6 Sheets-Sheet 3 ATTORNEYS Dec; 6, 1960 w. P. SHAW ETAL APPARATUS FOR WINDING WIRE AROUND TERMINALS Filed Dec. 20, 1957 6 Sheets-Sheet 4 INVENTORS WaZter P. Shaw W Robert L. Jmg e 2 lg ATTORNEYS Dec. 6, 1960 w. P. SHAW ET AL APPARATUS FOR WINDING WIRE AROUND TERMINALS Filed Dec. 20, 1957 6 Sheets-Sheet 5 1N VENTORS Wwwer P. Shaw a RoberfiL. Jud qe BY/JW I! WRNEYS Dec. 6, 1960 w. P. SHAW ETAL APPARATUS FOR WINDING WIRE AROUND TERMINALS Filed Dec. 20, 1957 6 Sheets-Sheet 6 INVENTORS A Walter}? Shaw W RpbertLJuQqe BY ,ai m

ATTORNEYS United States Patent APPARATUS FOR WINDING WIRE AROUND TERMINALS Walter P. Shaw, Wappingers Falls, and Robert L. Judge,

Poughkeepsie, N.Y., assignors to International Business Machines Corporation, New York, N.Y., a corporation of New York Filed Dec. 20, 1957, Ser. No. 704,146

15 Claims. (Cl. 140-93) This invention relates to improvements in an apparatus for winding filaments around binding posts or terminals, and more particularly to an apparatus for simultaneously winding a plurality of wires around a plurality of corresponding terminals, one for each wire, which are stag gered in different planes, and then breaking the wires at the terminals.

In some operations, for example, the making of core matrix planes for electronic computers, it is necessary to wrap each of a plurality of wires about a corresponding terminal and these terminals may be staggered in several ditterent planes. In the past, the operation of winding the wires, which are threaded through the magnetic cores f the core matrix, about terminals projecting from a core frame around the edges of the core matrix'has been a manual operation, and the wires have been'wrapped around the terminals by hand and then broken or cutoff at the terminal.

There are known devices in the nature of a hand drill or the like for winding or wrapping conductors around terminals. These devices consist of a portable drill-type body having a rotary eccentric which receives the wire and then rotates the wire around the terminal to wind the wire thereon. Whilethe known devices for winding conductors around terminals are apparently suitable for their intended purpose they could not be adapted to the delicate and tedious manual operation of wrapping a plurality of terminals staggered in separate planes, such as the terminals which project from the edges of a core plane frame.

It is therefore an object of this invention to provide an improved apparatus for simultaneously wrapping a group of wires about a group of corresponding terminals which are staggered in different planes.

It is also an object of this invention to provide an apparatus for simultaneously winding a plurality of conductors about a plurality of corresponding terminals and then breaking the conductors at the terminals after a predetermined number of turns of the wire have been made on each terminal.

It is an additional object of this invention to provide a device wherein the conductors are moved in an orbit around the terminals and this orbit is relatively close to the edges of the terminal, thereby providing only a small projecting end when the wire breaks adjacent the terminal which end does not project unduly and does not require additional bending around the terminal.

With these and other objects in view, the invention contemplates a device with a pair of jaws having a plurality of wire-receiving tubes carried thereby for receiving a number of wires positioned in a single plane. The jaws may be separated to move every other wire received 2,963,051 Patented Dec. 6, 1960 into a separate plane thereby positioning the wire-receiving tubes and the wires adjacent a group of staggered terminals which are to be wrapped. The wire which is inserted through the tubes in the jaws is clamped and a slack-forming device may then be used to form the same amount of slack in each wire. An eccentric mechanism is provided to rotate both jaws in unison and this ,will transcribe the wire-receiving tubes in an orbit about the terminals. The terminals are usually rectangular in cross section and the orbit transcribed is an elliptical orbit for the purpose of keeping the body of the wire as close to the edge of the terminal as possible. Since the wires have been clamped near their ends, when the predetermined amount of slack has been exhausted and the jaw movement is continued the wire will break in its orbit near the edge of the terminal.

Other objects and advantages of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated, of applying that principle.

In the drawings:

Fig. 1 is a top plan view of a preferred embodiment of the device positioned adjacent a core matrix frame having terminals on the edges thereof to be wound.

Fig. 2 is a side elevation view with the core matrix frame and support assembly shown partly in section.

Fig. 3 is a sectional front elevation view taken along Fig. 8 is a fragmentary sectional view taken along line 8-8 of Fig. 4.

Fig. 9 is a schematic perspective view showing the orbit of each of the wires around the body of the adjacent terminals.

Referring to the drawings, reference numeral 10 represents the wire-wrapping apparatus as a whole. The apparatus is adapted to receive a plurality of wires or conductors 12 which are positioned in a single plane and wrap or Wind these wires around a plurality of terminals staggered in two different planes. As shown in Fig. 8, the terminals 14 of the upper row and the terminals 15 of the lower row are alternately staggered.

The wires or conductors 12 may pass through a core matrix plane 16. This core matrix plane is of a type.

used in electronic computers and has a plurality of annular magnetic cores 18 positioned as shown in Fig. l and Fig. 2 in a core-supporting assembly 20. For a more detailed description of the core matrix plane, the

core-supporting assembly, and the threading of the cores,

reference may be had to the copending application en-.

titled Perforated Article Threading Device, Serial No. 613,985, filed October 4, 1956, and assigned to the assigned to the assignee of this invention.

As fully shown and described in the application referred to above, the magnetic cores 18 are supported in a fixture or supporting assembly 20 and the wires 12,

which may be contained in tubular needles (not shown in this application) are threaded therethrough. These wires are terminated at each edge of the core plane by winding them around terminals projecting from a core plane frame 22. Until the advent of applicants invention this step of winding the wires around the terminals in the core plane frame constituted a manual operation. The instant invention provides a means for automating this manual operation and, as such, embodies an apparatus which is attached to the core-supporting assembly 20 adjacent the core frame 22 to receive the wires 12 and to then wind the wires about the terminals 14 and 15 which are staggered in separate planes and which project from the edge of the frame 22. The core plane frame 22 contains V-shaped grooves 24 on its top surface and these grooves are positioned in the line of each wire 12 as it is threaded through the core matrix.

Supporting means 26 for the wire-wrapping apparatus are provided in fixed relationship to the core plane frame 22, Fig. 2. The supporting means 26 includes a. pro jecting member 28 secured to the core-supporting assembly by screw means 30. A pair of upright supports 32, Fig. 3, are attached to each side of member 28 by suitable screws 36 extending through slots 34 in members 32. These slots extend in a vertical direction so that the members 32 and consequently the entire wirewrapping apparatus may be vertically positioned to place the wire-receiving portions of the apparatus adjacent the grooves 24 where the wires 12 will be received.

An elongated journal block 37 is rigidly secured to the uprights 32 by suitable screws 39. Slidably movable on a face of the journal block 37 is an inner movable plate 38 having projections 40 on the face thereof adjacent block 37. The projections cooperate with grooves 41 such that plate 38 may move relative to fixed journal block 37 in a vertical direction. Attached to the outer face of plate 38 is an outer plate 42 and this plate has horizontal projections 43 on the inner face thereof cooperating with horizontal slots 44 in the outer face of plate 38. The horizontal projection and slot arrangement allows the outer plate 42 to move in the horizontal direction relative to plate 38 and this movement may be superimposed upon the movement of inner plate 38 in a vertical direction.

A crank shaft 46 is rotatably journaled in block 37 and has two eccentric portions 48 and 49 adjacent the end thereof. An end plate 50 secured by screw 51 to the end of the crank shaft and a collar 52 secured by suitable set screws 53 prevent the crank shaft from moving axially in the journal block. The crank shaft 46 may be turned by means of a suitable handle 54 which is rigidly secured to the other end of the shaft by handle set screws 55. Inner plate member 38 has a generally horizontal elongated slot 56 therein and outer plate member 42 has a generally vertical elongated slot 58 therein, Figs. 5 and 6. A suitable antifriction bearing 60 is provided on the eccentric portion 49 of the crank shaft and fits within slot 56, and a similar bearing 62 on eccentric portion 48 of the crank shaft cooperates with the edges of slot 58. The arrangement including the two outer plates 38 and 42 and the slots 56 and 58 for journaling the bearings 60 and 62 attached to the eccentric portions 48 and 49 of the crank shaft 46 allows the outer member 42 to be transcribed in an elliptical orbit. As the crank shaft 46 is rotated the eccentric portion 48 of the crank shaft causes the bearing 60 to bear against the edges of the slot 56 and move the plate 38 in a vertical direction. Superimposed upon this reciprocating vertical movement of plate 38 is a reciprocating horizontal movement of plate 42. This is caused by the rotating eccentric portion 49 of crank shaft 46 which causes bearing 62 riding in slot 58 to move member 42 back and forth in a horizontal direction. Since member 42 is attached to member 38 this horizontal movement will be superimposed upon a vertical movement and the distance of these two movements will be equal to the major and minor axes of an ellipse. The two eccentrics and their cooperating parts provide an elliptical motion of plate 42.

A wire-wrapping device having wire-receiving means may be moved in an elliptical orbit, to wrap the wires around the terminals, because it is carried by the orbitally movable plate 42. This plate has upper extensions 64 which carry an upper jaw 66 of the wire-wrapping device rigidly secured thereto by suitable screw means 67, Fig. 4. A lower jaw 68 is carried by the upper jaw 66 and is attached thereto by means of screws 70. Springs 72 are positioned around the body of the screws 70 and provide a bias to continuously urge the lower jaw into engagement with the upper jaw. The lower jaw may be separated from the upper jaw against the bias of the springs by a pair of separating cams 74 pivoted at 75 in the upper jaw 66 and having handles 76. In moving these handles from a vertical to a horizontal position as shown in Fig. 3, the cam portions 74 act upon the top surface of the lower jaw 68 to force this jaw downwardly against the bias of spring 72. The jaws 66 and 68 each have a plurality of spaced teeth 78 and 80, respectively, thereon. These teeth are positioned to intermesh when the jaws are closed and the handles 76 of the separating cams are in a vertical position. Each tooth 78 on upper jaw 66 carries a wire-receiving tube 82 having a flared end and each tooth 80 on the lower jaw 68 also carries a similar tube 84. These tubes provide the means for receiving the threading needles (not shown) and the wires 12 after the wires are threaded through the core matrix. When the jaws 66 and 68 are closed and their teeth intermeshed, the wire-receiving tubes 82 and 84 will all be positioned in a single plane and this plane may be adjusted to coincide with the plane of the wires 12; therefore, when the jaws are closed the wire-receiving tubes are in a position to receive the wires to be wound or wrapped around the terminals 14 and 15.

In moving the handles 76 from a vertical to a horiz'ontal position, the separating cam 74 separates the jaws and moves the wires in tubes 84 to a position in a plane adjacent the terminals 15 while the wires in tubes 82 remain adjacent terminals 14.

The wire-receiving tubes 82 and 84 will move with the same motion as plate 42, as the jaws are attached through inter-connections to this plate, therefore, since plate 42 transcribes a small elliptical orbit, the ends of tubes 82 and 84 will also transcribe an identical elliptical orbit 124. See Figs. 8 and 9.

After the wires 12 are fed or threaded through'the wire-receiving tubes 82 and 84 they may be rigidly clamped by a suitable clamping device 86, Fig. 4. This clamping device consists of a lower clamp portion 88 having rubber 89 on the clamping surface thereof, and an upper clamp portion 90 also having rubber 91 on the clamping surface. A pair of side members 93 are secured by suitable screws 95 to the lower clamping portion 88 and the upper extension 64 on plate 42. The upper movable clamping portion 90 is actuated by a clamping shaft 92 having a handle 94 thereon. The central portion of this shaft is eccentric at 96 to the end portions 97 which are journaled in elongated horizontal slots 98 in the side members 93 to allow the shaft 92 to move in a horizontal direction when the eccentric portion is actuating the clamp, Fig. 7. The clamping shaft 92 is connected to the upper clamping portion 90 by a pair of connecting extensions 100 which surround the eccentric portion 96 of the shaft. The upper clamping portion 90 is guided along projections extending inwardly from the side members 93 by four guide plates 104 which are attached to the clamping portion 90 by screws 102. Due to the eccentricity 96 of the shaft 92, as the handle 94 is moved the upper clamping member 90 will be moved vertically to clamp or unclamp any wires extending between the rubber portions 89 and 91 as shown in Fig. 4.

slide-bearing portion 115 of a top plate 117. Each top plate is suitably secured by screws 119 to the side members 93 and extending portions 64 of movable plate 42. Springs 118 are positioned around the upright guides 114 to bias the slack-forming bar upwardly to a nonuse position. Joining the two guides at the top is a top handle connection 116, shown in Fig. 3.' A stop portion 120.

which is an extension of the lower clamping portion 88 functions as a stop for adjustable set screws 122 threaded into slack-forming bar 108 and extending from the lower edge thereof. As the bar 108 is pushed downwardly, each wire 12 fits within a corresponding slot 110 or 112 depending on whether the wire was received through tube 82 in the upper jaw 66 or tube 84 in the lower jaw 68. This is shown in Fig. 4 and it will be seen that the difference in the depth of the grooves is necessary in order to form the same amount of slack in each of the wires regardless of which plane it is in. Referring to Fig. 4, the amount of slack in the upper wire received through tube 82 is equal to the length of wire a-j-b-j-cd. The amount of slack formed in the wire received through the tube 84 in the lower jaw 88 is equal to the length of wire x+y+zw. The purpose of having the same predetermined amount of slack in each wire is to provide the same number 'of turns around each terminal. Since the amount of slack must be equal, the slots in wire-forming bar 108 must be proportioned accordingly. The wires when wound around the terminals will exhaust their slack at the same moment thereby breaking and leaving the same amount of Wire wrapped on the terminals. The amount of slack formed may be adjusted by means of the adjustable stop screws 122.

The complete operation of the apparatus of this invention will now be described. The jaws 66 and 68 of the wire-wrapping apparatus 10 are closed so that the teeththereon will be interrneshed. The device is attached to the core frame supporting assembly 20 and adjusted in a vertical position by means of screws 36 extending through slots 34 to place the ends of the tubes 82 and 84, which are positioned in a single plane, adjacent the wire-receiving grooves 24 in the core frame 22. The wire or conductors 12 may be threaded through the cores 18 and the grooves 24 into thetubes 82 and 84 by means of hollow tubular needles as fully disclosed in aforementioned copending application Serial No. 613,985. After the hollow needles carrying the wires are fed to the front edge of the clamping assembly 86, the wires are fed on through the needles to a position between the clamping surfaces 89 and 91. The clamping handle 94 may be rotated downwardly to move the top clamp portion 90 downwardly to clamp all of the wires 12. The hollow tubular needles may then be retracted. Any slack in the wires at this time may be removed by any suitable means, such as by manipulating the movable carriage and wire supply reel brakes of the threading device disclosed in aforesaid application Serial No. 613,985. After any slack is removed from the wires the wire supply brake may be released to allow the wire to be withdrawn from the supply reels in equal amounts as Will be exp ained hereinafter.

'The handles-76 of the jaw separating cams 74 are moved from 'a vertical to a horizontal position to separatethe jaws 66 and 68 and therefore position the'tubes 84 of the teeth 80 in the lower jaw 68 adjacent the terminals in the lower row or plane of terminals. The next step in the operation is that of forming the slack in the wires 12 by means of the slack-forming device 106. This is accomplished by pushing down on handle connection 116 to move the slack-forming bar 108 downwardly until stopcation Serial No. 613,985. The handle 54 of the crank shaft 46 may then be rotated to cause member 42 and therefore the Wire-receiving tubes 82 and 84 to transcribe a small elliptical orbit 124 about each of the terminals 14 and 15. This motion moves the ends of the tubes 82 Y and 84 in the same elliptical orbit about the body of the terminals thereby carrying the body of the wires 12 about the terminals and winding the wires 12 on the terminals a predetermined number of turns. See Fig. 9. After the slack has been exhausted, and since both ends of the 1 wire are clamped, the wire will break at the terminals.

The purpose of moving the ends of the tubes 82 and 84 in elliptical orbits is to break the wires as close to the body of the terminal as possible, and since the body of the terminal is rectangular in cross section, an elliptical orbit provides a shorter end sticking up from the body of the terminal than would a circular orbit. However, for a terminal having square cross section a circular orbit would be better adapted to achieve this result.

The wires break when the tubes continue to move after the slack is dissipated since the tension set up in the wires exceeds their breaking point.

Although thev preferred embodiment disclosed above is adapted to be positioned adjacent a core-supporting assembly on the side thereof opposite the core-threading device disclosed in aforesaid application Serial No. 613,-

985, it is within the contemplated scope of this invention to incorporate this wire-winding device in the threading device by utilizing the same principles disclosed here- 1n.

While there has been shown and described the fundamental novel features of the invention as applied to a preferred embodiment, it will be understood that various omissions and substitutions and changes in forming details of the device illustrated and its method of operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the spirit and scope of the following claims.

What is claimed is:

1. A wire-wrapping apparatus for wrapping a plurality of conductors about a plurality of terminals, said apparatus comrising: a fixture-supporting base; a pair of relatively movable jaws attached to said base, each of said jaws having a plurality of conductor-receiving openings therein for receiving Wire from behind each of the terminals; means mounting said jaws for simultaneous ellipitical orbital movement with respect to said base, whereby conductors received through said openings may be Wound around terminals positioned adjacent said jaws such that the terminals are inside the orbital movement transcribed by the openings, clamping means mounted on said jaws for clamping the conductors received through said openings, and conductor slack-forming means located intermediate said clamping means and said jaws and carried by said jaws for forming a predetermined amount of slack in the conductors to be wound around the terminals wherebywhen' said slack is exhaustedsaid conductors will break at said terminals. v.

2. A wire-wrapping apparatus for receiving'a gang of wire-receiving members mounted thereon and each having 7 a plurality of wire-receiving openings therein, one of said members being movable relative to the other and in one position i-placing all the wire-receiving openings of the members in the plane of the received wires, while in another position placing some of the wire-receiving openings of the members in at least one difierent plane thereby positioning each of said wire-receiving openings adjacent its corresponding terminal; and further means mounted on said supporting member mounting said wirereceiving members for orbital movement as a unit to orbitally move each of said wire-receiving openings about its corresponding terminals.

3. An apparatus as defined in claim 2 further comprising: clamping means carried by said wire-receiving members for clamping the wires received through said openmgs.

4. An apparatus as defined in claim 3 wherein each of the wire-receiving members have a plurality of interspaced intermeshing teeth thereon, said teeth having tubes therein providing the wire-receiving openings,

5. An apparatus as defined in claim 4 wherein said means mounting said wire-receiving members for orbital movement, includes a crank shaft with eccentric means thereon for causing elliptical orbital movement, said shaft being rotatably supported in said supporting member.

6. An apparatus as defined in claim 3 further comprising: slack forming means to form a predetermined amount of slack in each of said wires between said openings and said clamping means, whereby when said wires are wound around said terminals until said slack is exhausted each terminal will have the same number of turns of wire wound therearound, said slack forming means being positioned between said wire-receiving members and said clamping means, and said slack forming means being carried by said wire-receiving members.

7. A wire wrapping apparatus for simultaneously wrapping a group of wires positioned side-by-side in a single plane about a group of terminals which are staggered in different planes, said apparatus comprising: a supporting fixture, a pair of wire-receiving jaws carried by said fiixture, said jaws having a plurality of wire-receiving openings therein for receiving wires from behind said terminals, one of said jaws being movable with respect to the other from a position with all of said openings in a single plane corresponding to the position of the group of wires to another position with all of said openings adjacent said terminals staggered in ditierent planes; and means mounted on said supporting fixture for simultaneously moving said jaws in an orbit to wrap said wires around said terminals.

8. An apparatus as defined in claim 7 further comprising: a cam and lever operated clamping mechanism for clamping the wires received through said wire-receiving openings, said clamping mechanism being carried by said jaws on the side thereof opposite said terminals.

9. An apparatus as defined in claim 8 wherein said moving means includes a shaft with a hand crank on one end and eccentric means on the shaft cooperating with said wire-receiving jaws for causing said jaws and the openings therein to transcribe an elliptical orbit.

10. An apparatus as defined in claim 8 further comprising slack forming means for selectively forming a desired amount of slack in said wire, said means selectively forming slack in said wires being positioned between said clamping mechanism and said wire-receiving openings.

11. An apparatus as defined in claim 10 wherein said slack forming means includes a slack forming bar with a plurality of grooves therein, each of said grooves corresponding to each of said wires and being of sufiicient depth to provide the same total amount of slack for each wire.

12. A wire-wrapping apparatus for wrapping a plurality of wires received in a single plane about the same number of corresponding terminal-s, alternately staggered in two two wire-receiving jaws movably mounted on said supporting member, said jaws having intermeshing teeth and each of said teeth carrying a wire-receiving tube therein positioned such that said tube ends .may be aligned with single line of wires when said teeth are meshed; a cam device for moving one of said jaws with respect to the other of said jaws to position said tube ends in two planes and thereby position the end of each wire-receiving tube adjacent the body of its corresponding terminal; a handle operated crankshaft journaled in said supporting member and having eccentric means thereon operatively connected with said jaws to cause said jaws to simultaneously transcribe an elliptical orbit to move each of said wire-receiving tubes about its adjacent corresponding terminal; a cam operated clamp carried by said jaws for clamping wires receive through said tubes, and a grooved bar slack former supported by said jaws between said clamp and said jaws for selectively forming a predetermined amount of slack in each wire such that each wire so formed has the same amount of slack regardless of which tube it was received through.

13. An apparatus for receiving a plurality of wires from a single plane adjacent the apparatus and wrapping these wires about a plurality of projecting terminals facing the device and staggered in more than one plane and then breaking the wires at the terminals, said apparatus comprising; a supporting member, at least two wire-receiving jaws having a plurality of wire-receiving openings therein, said jaws being movable relative to each other such that in one position of the jaws, all of the wire-receiving openings thereof are in a single plane while in another position of the jaws, some of the wirereceiving openings are in one plane while others are in another plane, means mounting the jaws on said supporting member for orbital movement as a unit to move each of the wire-receiving openings in an orbit, clamping means positioned behind the jaws on the side thereof oppos.te the projecting terminals for clamping the wires received through the openings in the jaws, and a slackforming device for selectively forming slack in the con-.

ductors received through the wire-receiving openings, the slack-forming device being positioned between the clamping means and the wire-receiving openings of the jaws.

14. A wire-wrapping apparatus for wrapping a plurality of wires received in a single plane about the same number of corresponding terminals, the terminals being alternately staggered in two planes, the apparatus comprising; a supporting base, two wire-receiving jaws movably mounted on the supporting base, the jaws including intermeshing teeth with each tooth carrying a wire-receiving tube positioned therein such that the tube ends may be aligned with the single plane of wires when the teeth are meshed, means for moving one of the jaws with respect to the other to position the wire-receiving tubes in two planes and thereby position the end of each wire-receiving tube adjacent the body of a corresponding staggered terminal, means journaling said jaws for orbital movement as a unit whereby the end of each of said tubes transcribes an orbit adjacent its corresponding terminal, a clamp positioned behind the jaws on the side thereof opposite said extending tubes, and a slack former positioned between the clamp and the jaws for selectively forming a predetermined amount of slack in each wire such that each wire has the same amount of slack, regardless of which tube it was received through after the jaws have been separated.

15. A wire-wrapping device for wrapping a plurality of wires about a plurality of terminals, comprising; a supporting base, wire receiving jaw means adapted to be positioned to face the terminals, said jaws having a plurality of wire-receiving passages extending therethrough for receiving wires from behind the terminals, means journalling the jaw means on the base for movement in an elliptical orbit to transcribe the wire-receiving passages about the terminals, a clamp positioned on the side wound 'on each terminal and the wires will break at the of the jaws opposite the terminals for clamping the wires terminals.

received through the wire receiving passages and a slack iormer positioned between the clamp and the jlirw mean; References Cited in the file of this patent or forming a predetermined amount of slac in eac 5 wire, whereby when the jaw means are traversed in the UNITED STATES PATENTS elliptical orbit a predetermined number of turns will be 2,855,159 Mallina Oct. 7, 1958

Images