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March l5, 1938. 2,111,115 H. J. GIBBS ET Al.WIRE TYING MACHINE Filed Aug. 11, 193e ’ 5 Sheets-Sheet l //7 @j THOMAS A, BmeHAM ,BY W. BINGHAM ` D‘AvJD " ATTORNEY arch 15, 1938'. H. J. GIBBS ET A». '2,111,115 WIRE TYING MACHINE Filed Aug. ll, 1936 5 Sheets-Sheet 2 E 76 mvgmoRs A f' 96 @i HAROLD J. Glßßs THOMAS A." BINGHAM D'Avm W. BWGHAM BY ATTORI/viv March l5, 1938. H. J. Glass ET A1. ZÄMÄÜ WIRE TYING MACHINE FiledAug. 11, 1936 5 Sheets-Sheet 3,y A ’r ‘NVENTORS HAROLD J.. GIBBS THOMAS A. BINGHAM DAVID W. BINGHAM Bq M@ @Mob ATToR/yrfy Emi-1938. l ` ' H. .1 Glass Er AL WIRE TYING > MACHINE Filed Aug. 11, 1936 @1% ¿nlug y ' l 5 sheets-Sheet 4 MENTORS HAROLD J. 6:31155l THOMAS A. BINGHAM DAVIUW. BINGHAM 'Bv M Arran/wy' ^ March l5, 1938. H. J. GIBBS ET AL 2,111,115 WIRE TYING MACHINE Filed Aug. ll, 1936 5 Sheets-Sheet 5 Il ìNVENTORS HAROLD J. GIBBS THOMAS A. BWGHAM DAVID \/\/. BINGHAM' 2,111,115 Patented Mar. 15, 1938 UNITED STATES PATENT OFFICE 2,111,115 WIRE TYING MAoiuNE Harold John Gibbs, Thomas Alexander Bingham, and David William Bingham, Melbourne, Aus tralia, assignors to Gerrard Wire Tying Ma chines Company Proprietary Limited, West Melbourne, Australia Application August 11, 1936, Serial No. 95,448 In Australia August 16, 1935 . Y v 26 Claims. (Cl. 140-93) ’ This invention relates to wire tying machines fected by positively actuated means devoid of of» the kind wherein wire led round a case or the springs or other extraneous members liable to like to be bound is tensioned and the overlapped ends or portions of the wire are secured together si. by twisting one around the other. breakage or disorder; to provide power operating . The general object of the invention is to pro- vide a wire tying machine adapted for, and equipped with hand ‘or power operating mecha nism whereby Wire binding operations may be performed eiiìciently and rapidly with a minimum of manual attention, the various functions of the machine being carried out automatically in proper sequence, thus permitting a high rate of output. More specific objects of the invention are: to provide a power operated wire tying machine adapted to be brought into action by a clutch device which is readily operable manually by an operator incidental to his placing wire in opera 20 tive position through the machine and around mechanism from which driving energy is sup plied tothe machine and also to means synchro Ul' nized with the operation of the machine so as to 'eli‘ect relative movement between the case or the like and the machine at the completion of binding operations to thereby facilitate delivery or replacement of the case or the like; to provide counterbalanced supporting means for the ma chine, case moving means and power operating mechanism whereby the machine is rendered more convenient in operation and control and is capable of giving a relatively high rate of output. ' The foregoing and various other objects and features of the invention and the advantages arising therefrom will however be more readily appreciated from the following description of one 20 a case or the like; to provide a wire tying ma practical embodiment, it being understood that chine in which relatively small and detachable parts such as springs, pawls, latches and the like various modifications, additions and/or reñne ments may be incorporated without departing are eliminated or reduced to a minimum; to pro vide a wire tying machine in which the functions of tensioning, twisting and cutting the wire are from the spirit and scope of the invention as brought about by and during continuous turn ing of a main shaft in one direction, and pref erably during one complete revolution of the shaft, until the parts arrive in positions ready to repeat the cycle of operations; to provide im proved wire tension means in which the wire is sub-jected to equal amounts of tension at oppo site sides of the twisting means and in which the tension action is purely linear or straight line and is effected by a force whichis constant and uniform for the entire tensioning action; to provide ample compensation for the tension means in order to avoid overstrain and fracture 40 of the wire by spring means of such form and dimensions as will effectively withstand stresses and fatigue due to constant use and in which the stresses are evenly distributed throughout the spring means; to provide means by which the amount or degree of tension may be inñ nitely varied by a simple adjusting operation; to provide a wire tying machine capable of ready adjustment to give variation in the number of twists imparted to the wire to provide a ma 50 chine which ensures that the portions of the wires extending between the opposite twist portions will lie iiat in side by side attitude upon the case or -box being bound; to pro-vide a machine in which cutting of the wire takes place after 55 completion of the twisting operation and is ef deñned by the appended claims. 25 Referring to the drawings which form part of this specification: Figure 1 is a side elevation showing a power operated machine with supporting means and case ejecting mechanism according to the in 30 vention. Figure 2 is a plan of Figure 1 in which certain parts are broken away for convenience of illus tration. Figure 3 is a front view of the machine on a larger scale. Figure 4 is a plan of the machine. Figure 5 is an elevation of the main shaft with associated parts in section. Figure 6 is a cross section on an enlarged scale on line VI-VI of Figure 5. Figure 7 is a right hand end View of the ma chine. ' Figure 8 is a left hand end view of the ma chine. Figures 9, l0 and ll are side views of the twist ing means and cam devices associated therewith and illustrating the “overthrow” and automatic return action of the twisting means. Figure 12 isla front elevation of a power grip 50 per. Figure 13 is a plan of Figure 12. Figure 14 is a cross section of line XIV-XIV of Figure 13. Figures 15 and 16 are developed views of the 2 2,111,115 left and right hand cams, respectively, of the main shaft. Figure 17 is a front view of the twisting means, with a bearing cap removed. Figure 18 is a section on line XVIII-XVIII of throughout the springs. Consequently by making the springs of adequate dimensions, for example, gripper. Figure 23 is a cross section on line A--A Fig~ ure 4. Figure 24 is a cross section on line B-B Fig ure 4. Figure 25 is a cross section on line C-C Fig ure 4. A machine in accordance with the invention has a suitable base plate 2 capable of resting upon a case or other object to be bound. Bearing brackets 3 with detachable caps 4 may upstand from the base at appropriate positions adjacent 35 40 45 tension operation will be distributed uniformly Figure 19 is an end View of the left hand cutter and actuating means. Figure 20 is a fragmentary left hand end view showing clutch operating means for connecting a lay shaft to a power operated shaft and means Figure 22 is a perspective view of the left hand 30 wire which avoids excessive tension eifort being applied to the wire. It will be evident that any stresses imposed upon these springs during the Figure 1'7 including the bearing cap. for suddenly arresting rotation of the main shaft of the machine. Figure 21 is an elevation of the lay shaft with 15 associated parts in section. 20 pensating action during the tensioning of the to the front edge of the base to support a shaft ß, hereinafter referred to as the main shaft, from a single revolution of which all essential func tions, i. e., tensioning, twisting and cutting of the wire, are derived. Left hand and right hand wire gripping de vices indicated generally by the numerals 'l and ii are provided one at each side of the twisting device, and these two grippers are adapted to be moved away from each other with a straight line motion to tension the wire. For this purpose the grippers may be mounted upon slides 3, i l , guid ed by pairs of guide rods l2, I3 aiiixed to the base 2. The tension slides are provided with rollers I4 for (2o-operating with two cam members i6, il, on the main shaft by which the gripper car rying slides are moved in unison to tension the wire. Each said cam member is preferably in the nature of a cylindrical collar connected to the shaft by splines i8 enabling the collar to move axially along the shaft. Each collar is provided around its periphery with a channel or cam track of about one and a half to two inches in diameter, and of appropriate cross section and length, they will effectively withstand repeated use and re 10 main free of fatigue. Inñnitely variable ad justment of the amount of tension may be ob tained by adjusting the nuts 28. The right hand gripping device is preferably so arranged as to grip the Wire with power de 15 rived from operation of the associated tension cam ll. For this purpose the track engaging roller lé for cam il, as best seen in Figures 12, 13, and 14 may be mounted about a stem 3l up standing from one end of a gripper lever 32 in 20 termediately pivoted, as by pin 33, to tension sli-de li and having at its front end a gripper 3ft disposed adjacent an anvil 3G which may be formed by a replaceable member detachably se cured to a lug :il` at the front of the slide Il. 25 Pivotal movement of lever 32 and gripper 34 may be limited by flanges 3S upstanding from the slide at the sides of the lever. With such an arrange ment it will be seen that there may be a certain degree of lag in the outward movement of slide 30 El relative to its cam IT such lag being taken up by swinging movement of the gripper lever 32 in a direction to swing the gripper 311 to the left so that it more tightly grips the wire. This grip is so efficient that it may not be necessary 35 for the 4gripper to be serrated, or if serrated, the serrations need only be of comparatively slight depth and devoid of sharp edges. The co-acting face of anvil 35 may if desired be similarly ser rated. 40 Such gripping means will not deform, bend or bite into the wire which is important for the reason that the gripped portion will after com pleting of the cycle of operations form part of the twisted portion in the next cycle of operations 45 and, being unweakened, will effectively stand the tensioning and twisting operations. The left hand gripping device may be similar to to the right hand device but as the portion of the wire held by the left hand device is dis 50 carded after cutting it is not so important. Thus a simpler gripping device as seen in Figure 22 the sides of which are engaged by the roller on the respective slide. The track T of each cam member is endless and as best seen in Figures l5 55 and 16 has commencing from the neutral point N a spiral portion I9 which produces outward move may be employed at the left hand side of the machine. This device comprises a jaw 3l fixed between lugs 3S outstanding from slide 9 and dis- . ment of the respective slide, and which merges at one end into a purely circumferential portion 2l which holds the respective slide in its outward 60 position while the tensioned wire is being twisted, 39 may have a groove 4l in its face 42 which is curved so that when the leading end of the wire has been inserted between the jaws and is then posed opposite an eccentrically pivoted jaw 39 also disposed between lugs 38. The pivoted jaw and a return portion 22 which may curve or ex bent or curved to the right along the groove 4I tend spirally to neutral point N so as to cause the respective slide to return to its inward position the pivoted jaw will effectively grip the wire against the stationary jaw. The adjacent faces after completion of the twisting action. Such re of the two jaws may be serrated to assist the 65 turn action may be assisted if so desired by spring means (not shown). Each cam or collar I3, il may have an axial recess 23 extending for a suitable distance from its inner end to accommodate a coiled spring 24 70 which encircles the main shaft 6 between a face or shoulder 26 terminating said recess and an ad justable enlargement 2l' such as a washer or disc backed by a nut 28 engaging a screw threaded portion 2S of the main shaft. The two springs 75 associated with the cam members provide a com gripping action. 65 The twisting means may comprise a slotted twister pinion 46 or known or suitable form pro -vided with hollow outstanding trunnions 4"! (see Figures 17 and 18) fitting in slotted sleeves 48 partly accommodated in recesses 49 in the front 70 of the base 2 and retained in position by projec tions 50 of a bearing cap 5l attached to bearing brackets 3. A segmental driving gear 52 on the main shaft 6 meshes under certain conditions with a smaller 75 3 2,111,115 'completely toothed- gear 53 una ylay spindle 54> tion that itsslot is aligned with the wireway of the machine. After this reverse movement of the lay spindle and twister pinion has been com which also carries another completely toothed and larger gear 56 meshing with the twister pleted, the second cam 59 and associated parts are again locked in position by the col-operation of the major semi-circular face 58e of the ñrst pinion. rI‘he lay spindle 54 may be journalled in erl bearing sleeves 5l partially accommodated by recesses in bearing brackets 3 and by the bearing cam and the concave face 59h of the second face, cap 5l. v The segmental driving gear 52 may have a cam V5i! at one side which co-operates with a cam 59 on lay spindle 54 in such manner-'that until vsuch time as the major `semi-circular face 58o' recedes from the concave face 59h as pre viously described. the latter and consequently the twister‘pinion are prevented from rotation at all periods other than when twisting is taking place, the segmental gear during such periods passing idly by its' as sociated driven gear 53. After completing the 15 required number of twistsv the twister pinionis further revolved through a ksn'iall arc, still being driven by the gears.- Then the camsf58§ 59, cause the twister pinion. to turn in reversethrough a appropriate number ofv teeth, such change being the only one necessary to adapt the machine for three, four or more twists. Cutting devices, one at the outer side of each wire receiving jaw 6l, may be brought into oper ation automatically after completion of the twist ing operation. ~These cutters are preferably de 20 void of springs and arranged to be positively corresponding »arc so that the slot of the pinion 20 is aligned with the wire-way o-f the machine. This “overthrow” of the twister pinion and auto operated, both on their active and return move matic reverse movement ensures thatthe over ments, from the main shaft 6. For this purpose the main shaft may have two cutter cams, reach advantageously in the form of a collar 63 with lapped untwisted portionsY of the. wire will lie flat in side by side> formation upon the box or case when the machine is freed from the tied wire binding. 30 Y v a cam track 63a in a side face for accommodat » ing a roller 64 on a pin 66 projecting fro-m a plate 61 pivoted about a pin' 69 to the base of the ma chine, the plate carrying a cutter blade 69 lo Various cam arrangements ~may be adopted to produce the before mentioned actions. Ac cording to the illustrated form (see Figures 9, 10,' and 11) the segmental gear 52 is toothed vfor about cated-adjacent the respective wire receiving jaw. 30' By arranging for the cutters to come into opera one half .of its periphery and the cam. 58` vof this gear has a semi-circular face .58ay concen tion after the completion of the twisting action, instead of during the operation, it is'ensured tric and coterminous with the toothed portionof the main gear. This semi-circular face may merge at one end by an approximately tangential face 58h into an end of a larger diameter,.and- slightly less than semi-circular face 53C which is joined at its other end to the face 58a by a short somewhat radial face'58d. The other -cam 40 59 has a face 59a which is circular with the ex ception of a concave chordal portion 59h, the curvature of which conforms to the curvature of the larger diameter semi-circular face 58o of cam 53. ' ‘ -. . At the commencement of each cycle oi' opera tions', the untoothed portion .of the segmental gear is> adjacent the associated gear 53 while'the concave chordal face 5927 ofthe second cam is in engagement with the major semi-circular face . 58e of the ñrst cam as in Figure 9 whereby the second cam and lay spindle 54 are prevented from rotation without however impeding rota tion of the ñrst cam. During this stage the `wire is being tensioned and the twister pinion 46 is of course idle. As the .tension action isv com pleted the segmental gear` commences to mesh with gear 53 while the smaller semi-circular face 58a of the ñrst cam 58 comes opposite the concave -face 59h of the second cam 60 59, as in Figure 10 thus freeing the second cam, the lay spindle 54 and the twister Apin ion for rotation. The overlapped wires-which pass through slotted wire receiving jawsV 6l at opposite sides of thetwisting device, are thus 65 twisted together by the positive 4drive from the main shaft through the gear train 52,53, 56 to the twister pinion which continues until the toothed portion of the segmental gear recedes from gear 53. As this commences to take place, 70 the substantially tangential vface 58h of the first cam engages the concave face 59h of the second cam and causes the latter and consequently the lay spindle and twister pinion to be turned slight’ ly in the reverse direction; as in FigureV 11 thus returning'the twister pinion 46 into such a posi ' The number of twists effected by the twister pinion may be readily varied by selection of a segmental gear`52 and driven gear 53 having an that the torsional stresses are prevented from being concentrated at the outer ends of the two twisted portions and, owing to the distribution of such stresses, the wire is not weakened at any one point. Furthermore, the cut ends of the wire will not project outwardly but will lie snug ly against o-r contiguous with the adjacent por 40 tions of the wire and also lie flat upon the top of the box. The main shaft 6 may be adapted for manual operation or may be driven from any suitable source of power. In a preferred arrangement it 45 receives _ its drive from an electric motor ll through the medium of variable reduction gear ing, located in casing l2, a constantly rotated shaft i3 and a clutch device 14 winch is adapted to be thrown in by the operator, and to be auto 50 matically thrown out as the shaft 6 completes each revolution. The main shaft 6 may therefore be provided at its right hand end with a freely mounted spul` gear 16 meshing with a companion gear 'il rotat 55 able about a lay shaft 'i8 and fast with a bevel wheel 19 which meshes with a bevel pinion 8| con nected to the constantly rotated power driven shaft 13 which extends rearwardly of the ma chine. The lay shaft ‘i8 extends parallel with 60 and tothe rear of the main shaft and is sup ported by bearings 82 upstanding from base 2 and provided with detachable caps 83. According to one form, the clutch device 'i4 comprises a key member 85 (Figs. 5 and 6) adapt ed to be projected by a Vspring 85 through a radial slot 8l in the main shaft into any one of a num. ber of recesses 88 formed in the interior of the freely mounted spur gear '56. A lever 99 may be pivoted to lugs 9| outstanding from a bearing 70 bracket 92 supporting the power operated shaft 'i3 and may be acted upon by a spring plunger 93 tending to maintain the lever in normal posi tion. A forked end of lever 89 may be connected Y to asleeve 94 which is slidable lengthwise on the 75 4 2,111,115 main shaft and has an internal spiral cam face provided to cushion downward swinging of the 96 adapted to co-operate with the aforesaid key rear part of the see-saw frame. member 84. The clutch 14 is thrown into operation man ually by suitable means .conveniently located at To permit of rapid and easy separation of the machine from the driving motor, the power driven shaft 13 may have squared end portions the front of the machine and which may com prise a, horizontal rocker spindle 91 journalled and a collar |26 of a spring loaded clutch |21 in bearings 98 carried by certain of the bearing caps 4 and 83 and provided at each end with 10 upstanding arms 99 bridged by a horizontaloper ating bar or rod |0|. At its right hand end the rocket spindle carries a cam member |02 having a cam face |03 aligned with a roller |04 disposed between a forked projection |06 of lever 89. 15 Upon the operator pushing the bar |0| down wardly and rearwardly (against the influence of a spring pressed plunger |00 acting against a projection 99a of one of the arms 99 as in Fig ure 25) the cam face |03 causes lever 89 to turn about its pivot so that sleeve 94 by its movement along the main shaft enables key 84 to be spring projected to the key engaged in the first recess 88 of the freely mounted gear 16 which comes opposite to the key, whereby the main shaft 6 25 becomes coupled to the power driven shaft 13. Soon after the main shaft 6 commences to rotate the wide part of the sleeve cam face 96 comes opposite the head of the key member 84 so that the sleeve 94 due to spring plunger 93 and lever 30 89 moves lengthwise on the shaft over the key 84 whereby the latter is gradually depressed by the spiral cam face 96 with the result that the main shaft after making one complete revolution is disconnected from the power driven shaft. 35 If desired, the sleeve 94 may have a second cam face |01 co-operating with a projection |08 on the main shaft 6 to prevent the lever 09 from being held by an operator in such a position as would prevent the automatic tripping of the 40 clutch at the completion of a single revolution of the main shaft. The machine, the power driving mechanism, and means for effecting relative movement be tween the machine and a. case at the completion 45 of a binding operation, are preferably mounted upon a tiltable or see-saw frame o-r support so that the machine normally assumes a position with its base 2 slightly clear of the case. This facilitates positioning of cases or the like beneath 50 the machine preparatory to wire binding opera tions, the normal operations of placing wire around the case and through the machine and the subsequent tensioning of the wire causing the machine to rest securely upon the upper face of 55 the case. For this purpose, a pair of bars || | (Figures 1 and 2) may be secured at their front ends to the machine base and at their rear ends to a plate | | 2 upon which the electric motor 1| l and reduc 60 tion gearing are mounted. Intermediately of their length the frame bars may have bearings H3 for an axle ||4 supported by a head piece ||0 vertically adjustable upon a pillar or stand H1. This stand, which is shown as comprising 65 a T-section bar, may have a toothed rack || 8 engaged by a worm pinion ||9 supported in the head piece | I6 and operable by the cranked end |20 of spindle |2I. The see-saw frame may be counterbalanced as 70 by a spring |22 connected at its upper end to plate ||2 and at its lower end to a bar |23 de pending from the head piece. A buffer device, comprising for example a spring |24 supported beneath the rear end of plate ||2 from a rear ‘ ward projection ||6a of head piece IIB, may be 13a respectively fitting into the bevel pinion 8| that connects shaft 13 to the power driving unit. Relative movement between the machine and a bound case at the completion of a binding 10 operation is preferably effected by case pushing mechanism actuated by lay shaft 18, which is brought into action automatically as the main shaft 6 of the machine completes each revolution. Accordingly the left hand end of the main shaft 15 6 may have a cam like striker |28 adapted as the main shaft is nearing the end of each revolution to engage a roller |29 supported from a spindle |3| adapted to slide lengthwise in bearings |32, whereby the spindle is moved to the left against 20 the influence of spring |33. At its other end the spindle may be connected by lever |34 (Fig. 23) to a sleeve |35 of a clutch device |36 adapted to couple the power driven gear 11 to the lay shaft 18 and to automatically trip itself as the lay shaft 25 completes a revolution. Clutch device | 36 may be identical in all material respects with clutch device 14 previously referred to and illustrated in Figs. 5 and 6 and wherein sleeve 94 is the counter part> of sleeve |35 of the lay shaft clutch device. 30 In order to ensure that clutch 141s tripped be fore clutch |36 connects the lay shaft 18 to the power driven shaft 13, and also to definitely arrest rotation of main shaft 6 with the slot of the twister pinion correctly aligned with the wireway 35 of the machine, the main shaft is shown at its left hand end' with a disc |31 with a peripheral hump |38 disposed in the path of a roller |39 (Figs. 8 and 20) on the free vend of an arm |40 pivoted to the base 2 and urged towards the disc 40 |31 by a spring pressed plunger |4|. The rela tively steep end of hump |38 comes adjacent roll er |39 just before main shaft 6 completes each revolution, whereby the ñnal stage of rotation of shaft 6 is effected or assisted by the spring pressed arm |40, and the roller immediately snaps home behind the st_eep part of the hump |38 into a de pression |42 of disc |31 so as to' prevent any back lash or inadvertent turning of shaft 6. The lay shaft may have a disc |43 with eccen 50 tric pin |44 to which is connected the forward end of a rod |46 connected at its rear end, as by the screw threads |41 and nuts |48 to a block |49 held by a screw |5| between two legs of a case pushing member |52. Member |52 is pivotally 55 connected intermediately of its height to the see saw frame, as by means of a pivot pin |53 sup ported by a bar |54 bridging the bearings ||3, and provided at its lower end with a pad or the like |56 adapted to engage the rear end of a case 60 |51 being bound. It will be evident that upon throwing in of the clutch |36 the lay shaft 18 will make one complete revolution before being trip ped during which period the connections between the lay shaft and the case pusher member |52 will 65 cause the lower end of the latter to swing for wardly and push the case forwardly so as to free the bound wire from the machine and allow the latter to rise clear of the case. _ The amount of swinging movement of the case 70 pusher |52 may be readily adjusted by means of the nuts |48 and also by means of the adjusting holes |58 in the pusher member for the screw |5| . A brake device comprising a brake band |59 with screw adjusted spring influenced tension 75. 5 2,111,115 means |60 may co-operate with a disc I6! on the lay shaft in order to prevent the lay shaft from turning beyond one complete revolution during each cycle of operations. The gears 16, 11, 19- and 8| may be protected by guard |65 as best seen in Figs. 3, 4, 24 and 25, and the front of the guard may be in substantial lon gitudinal alignment with the wireway of the ma chine and the gripping members 134, 36, of the 10 right hand gripping device 8 to thereby act as a guide facilitating the insertion of the trailing end of a wire between members 34 and 35. Having now described our invention what we claim as new and desire to secure by Letters Pat 15 ent is 1. In a wire tying machine, a shaft, wire ten sioning means comprising cam members capable of lengthwise movement on said shaft, means yieldingly opposing such lengthwise movement in 20 one direction, a wire twisting device, two slides operatively associated with the respective cam members for gripping wire at opposite sides of said wire twisting device, whereby upon continu ous turning of said shaft the wire is tensioned by 25 a substantially straight line motion and for sub stantially equal amounts at each side of the twist ing device. 2. In a wire tying machine the combination claimed in claim 1 wherein each cam member 30 consists of a collar having a peripheral cam` track adapted to co-operate with a member of the respective slide, and has an associated coiled spring encircling said shaft and bearing at one end against said cam collar and at its other end 35 against a stationary abutment. 3. In a wire tying machine having a wire way extending at the front thereof, wire twisting means, a shaft, wire tensioning means, compris ing two cam members mounted upon said shaft 40 with ability for lengthwise movement thereon, spring means o-pposing such lengthwise move ment in one direction, two slides operatively asso ciated with' the respective cams and adapted to be guided for movement lengthwise of the wire and the slotted pinion at the termination of the twisting action. 6. In a wire tying machine, the combination claimed in claim 3 in combination 'with means vfor actuating said wire twisting means comprising a segmental toothed gear and a cam nfast on said shaft, a lay spindle parallel with said shaft, said spindle having a ñrst toothed gear aligned with said segmental gear, a second toothed gear adapt ed to mesh with a slotted pinion of said wire 10 twisting means, and a cam co-operating with said cam fast on said shaft, said last mentioned cam having an approximately semi-circular face concentric and'coterminous with the toothed por tion of said segmental gear, a tangential face 15 connecting said semi-circular face at one end to an end of a larger diameter` and slightly less than semi-circular face which is connected at its other 'end to the other endof said first mentioned semi-'circular face by a substantially radial face, 20 the companion cam on said lay spindle being circular with the exception o'f a chordal portion of concave curvature complementary to that of said second mentioned semi-circular face of the cam that is fast on said shaft. ì 25 7. In a_ wire tying machine, the combination claimed in claim 3 in combination with wire cutters located >one at each side of said wire twisting means between same and the respective tension slides, and cam means on said shaft timed 30 for actuating said cutters upon completion of the wire twisting' action. 8. In a wire tying machine having a wire way, wire tensioning means comprising two cam mem bers mounted upon a shaft,>two slides operatively 35 associated with the respective cams and adapted to be guided for movement lengthwise of the wire way of~ the machine, a wire twisting device, and gripping devices on the respective slides for grip ping Wire at opposite sides of said wire twisting device, whereby uponcontinuous turning of said shaft the wire is tensioned b-y a substantially ' straight line motion and for substantially equal amounts at each side of the twisting device, at least one of said gripping devices being adapted to tive slides for gripping wire at opposite sides of grip the wire with power derived from operation of an associated cam member and without de said wire twisting means, whereby upon continu forming, bending or biting into the wire, said ous turning of said shaft the wire is tensioned by gripping device comprising an anvil on one of a substantially straight line motion and for sub said slides, a lever pivoted to said slide and pro 250 stantially equal amounts at each side of the twist vided at one side of the pivot with a pin coop ing means. ' 4. In a wire tying machine the combination as v erating with a` track of one of said cam members, and provided at the other side of said pivot claimed in claim 3 wherein each cam has an end less cam track having a partly spiral portion with a gripper cooperating with the anvil on said which produces outward or tensioning movement slide. 9. In a wire tying machine having a wire way, of the associated slide, a circumferential portion which functions to hold the slide stationary while wire tensioning, wire twisting and wire cutting the tensioned wire is being twisted, and a return devices, a main shaft extending parallel with the portion which unites said iirst mentioned two wire way of the machine, and direct operative 60 portions and permits or causes the slide to return connections between said devices and said shaft to its normal position after the tensioned wire whereby said devices are automatically actuated to tension, twist and cut the wire during a single has been twisted. revolution of the shaft which results in said de 5. In a wire tying machine, the combination claimed in claim 3 in combination with' means vices being returned into their normal positions 65 ready to repeat the cycle oi operations. 65 for actuating said wire twisting means compris 10, In a wire tying machine having a wire way,` ing a segmental toothed gear and a cam fast on said shaft, a lay spindle, said spindle having a wire tensioning, wire twisting, and wire cutting ñrst toothed gear aligned with said segmental devices, a main shaft extending parallel with the gear, a second toothed gear adapted to mesh with wire way of the machine, direct operative con 70 70 a slotted pinion of said wire twisting means, and nections between said devices and said shaft 45 way of the machine, and devices on the respec a cam ,co-operating with said cam fast on said shaft, said two latter cams being so formed as to lock the lay spindle against rotation except ,l when the wire twisting action is taking place, 75 and to cause reverse rotation of said lay spindle whereby said devices are automatically actuated to tension, twist and cut the wire during a single revolution of the shaft which results in said devices being returned into their normal posi tions ready to repeat the cycle of operations, and 75 6 2,111,115 mechanism adapted, upon completion of each cycle of tensioning, twisting and cutting opera tions, to effect relative movement between the of said frame having a driving shaft extending forwardly to said wire tying machine, and mech anism adapted to be actuated by said driving machine and a case or the like that has been shaft for effecting relative movement between bound, in order to disengage the binding wire from the machine and facilitate the removal or' replacement of the bound case in relation to the machine. 11. In a wire tying machine, the combination claimed in claim 10, and including means for driv ing said main shaft and said mechanism for effecting relative movement between the bound case and the machine from a common source of power, and means for automatically transferring 15 the drive from said main shaft to said mechanism upon completion of said cycle of wire tensioning, twisting and cutting operations. 12, In a wire tying machine, the combination claimed in claim 10 and including a lay shaft for 20 actuating said mechanism for moving a` case relative to the machine, a constantly rotating power driven shaft, manually operable means for operatively connecting said main shaft to said power driven shaft so that the main shaft takes V25 the drive for a predetermined period at theV expiry of which it is automatically disconnected from the power driven shaft, and means adapted - to automatically connect said lay shaft to said power driven shaft at or about the time that 30 said main shaft is disconnected from said power driven shaft. 13. In a wire tying machine, the combination claimed in claim 10 and including a lay shaft for actuating said mechanism for moving a case rela 35 tive to the machine, a constantly rotating power driven shaft, a clutch manually operable to con nect said main shaft to the power driven shaft and adapted to automatically trip itself to there by free the main shaft from the power driven 40 shaft after the wirev has been tensioned, twisted and cut, and a second clutch, operable through the agency of said main shaft at or about the time that the latter is freed from the power driven shaft, for connecting said lay shaft to said power 45 driven shaft, said second clutch being adapted to trip itself to thereby free the lay shaft from the power driven shaft after said case moving mech anism has performed its function. 14. Improvements in and relating to wire tying 50 machines, comprising wire tensioning, wire twist ing and wire cutting devices, a main shaft, op erative connections between said shaft and said chine and a case that has been bound, power 20 driving mechanism including a constantly ro tating driving shaft, a manually operable clutch for coupling said driving shaft to said main shaft, means for automatically tripping said clutch as the main shaft completes a revolution, a clutch 25 for coupling said driving shaft to said lay shaft, means operated by said main shaft as it completes each revolution for actuating said last mentioned clutch to couple said main and lay shafts, and 30 means for automatically tripping said last men tioned clutch after the case moving mecha nism has performed its function. 17. Improvements in and relating to wire tying machines as claimed in claim 10 wherein the ma- ' chine, power driving means therefor, and mech anism for effecting relative movement between the machine and a case or the like that has been bound are mounted upon a tiltable or see-saw frame so that the machine normally assumes a 40 position with its base slightly clear of the case. 18. Improvements in and relating to wire tying machines as claimed in claim 16 wherein the ma chine, power driving means therefor, and mech anism for effecting relative movement between the 45 machine and a case or the like that has been bound are mounted upon a tiltable or see-saw frame so that the machine normally assumes a position with its base slightly clear of the case. 19. Improvements in and relating to wire ty 50 ing machines as` claimed in claim 10 wherein the machine, ’ power driving means therefor, and> wire tensioning, twisting and cutting devices, mechanism for effecting relative movement be mechanism for effecting movement between the tween the machine and a case or the like that has been bound are mounted upon a tiltable or see saw frame so that the machine normally assumes 55 machine and a case that has been bound, a lay shaft for actuating said mechanism, a constantly rotating power driven shaft, a clutch manually operable to connect said main shaft to the power driven shaft and adapted to automatically trip 60 itself to thereby'free the main shaft from the power driven shaft after the wire has been ten sioned, twisted and cut, and a second clutch, op erable through the agency of said main shaft at or about the time that the latter is freed from the 65 power driven shaft, for connecting said lay shaft to said power driven shaft, said second clutch 70 said machine and a case or the like after com pletion of the wire binding functions of the ma chine. 16. Improvements in and relating to wire tying machines comprising wire tensioning, wire twist ing and wire cutting devices, a main shaft, direct operative connections between. said devices and said shaft whereby said devices are automatical ly actuated to tension, twist and cut the wire dur ing a single revolution of said shaft which re sults in said devices being returned to their nor mal positions ready to repeat said cycle of op erations, a lay shaft, means operable by said lay shaft upon completion of each said cycle of operations to effect movement between the ma a position with its base slightly clear of the case. the machine being attached to the front part of the frame and a power unit being mounted upon the rear part of the frame, the frame being piv 60 oted intermediately of its length to a support, and means to counterbalance the frame in a substan tially horizontal attitude. 20. VImprovements in and relating to wire tying machines as claimed in claim 16 wherein the ma being adapted to trip» itself to thereby free the chine, power driving means therefor, and mecha nism for effecting relative movement between the lay shaft from the power driven shaft after said case moving mechanism has performed its machine andk a case or the like that has been function. frame so that the machine _normally assumes a 70 ’ 15. Improvements in and relating tol wire tying machines comprising a frame tiltably mounted intermediate of its length to a support, a wire tying machine attached to the front of said frame, a power driving mechanism mounted on the rear bound are mounted upon a tiltable or see-saw position with its base slightly clear of the case, the machine being attached to the front part of the frame, and a power unit being attached to the rear part of the frame, the frame being pivoted intermediately of its length to a support and 7 2,111,115 means to counterbalance the frame in a substan tially horizontal attitude. 21. Improvements in and relating to wire tying machines as claimed in claim 15 wherein said support is adjustable vertically upon a stand. 22. In a wire tying machine, the combination claimed in claim 10 and including a lay shaft for actuating said mechanism for moving a- case rela tive to the machine, a constantly rotating power driven, shaft, manually operable means for oper atively connecting said main shaft to said power driven shaft so that the main shaft takes the drive for a predetermined period at the expiry of which it is automatically disconnected from the power driven shaft, and means adapted to automatically connect said lay shaft to said power driven shaft at or about the time that said main shaft is dis connected from said power driven shaft, said mechanism for effecting relative movement ben tween the machine and a case comprising an ec centric on said lay shaft, a rod extending from Said eccentric and connected to a pivoted mem ber adapted to engage the rear end of a case and push it forwardly at the completion of binding 25 operations. 23. In a wire tying machine, wire tensioning means comprising a shaft, a pair of opposed cam members mounted to rotate ín unison about said shaft while capable of lengthwise movement 30 thereon, means yieldingly opposing lengthwise movement of said cam members in one direction, slide members actuated by rotation of said cam members to move in a straight path lengthwise of the Wire way of the machine, and wire grippers on said slides adapted to grip the wire in substan tially horizontal and vertical alignment with said wire Way. » 24. In a wire tying machine, the combination claimed in claim 23 and including a rotary wire twisting device driven in synchronism with said cams by a gear train including gears on a lay spindle, and means whereby said twisting device 10 is held against rotation while tensioning is taking place and whereby said slides are held against movement while twisting is taking place. 25. In a wire tying machine, the combination claimed in claim 23 and including wire cutting 15 devices adapted to be actuated in synchronism with said tensioning cams by additional cams ro tating with the first mentioned cams. 26. In a wire tying machine comprising wire tensioning, wire twisting and wire cutting devices, 20 a main shaft and operative connections of a di rect character, devoid of clutches or other inter mediate coupling means, between said shaft and said devices, whereby the latter are, during con tinuous turning of said shaft in one direction, brought into operation in the sequence named, and by the end of such turning are returned to their original or normal positions ready to repeat the cycle of operations. 30 H. J. GIBBS., T. A. BINGI-IAM D. W. BINGHAM.