US3027920A - Wire bending apparatus - Google Patents

Wire bending apparatus Download PDF

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US3027920A
US3027920A US648859A US64885957A US3027920A US 3027920 A US3027920 A US 3027920A US 648859 A US648859 A US 648859A US 64885957 A US64885957 A US 64885957A US 3027920 A US3027920 A US 3027920A
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wire
bending
piston
arm
arms
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US648859A
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Matthew H Payne
Byard D Simpson
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CEDAR RAPIDS BLOCK Co
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CEDAR RAPIDS BLOCK CO
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21FWORKING OR PROCESSING OF METAL WIRE
    • B21F27/00Making wire network, i.e. wire nets
    • B21F27/12Making special types or portions of network by methods or means specially adapted therefor
    • B21F27/20Making special types or portions of network by methods or means specially adapted therefor of plaster-carrying network

Description

M. H. PAYNE ETAI.5 3,027,920
WIRE BENDING APPARATUS April 3, 1962 Filed March 27. 1957 6 Shees-Sheetl 1 April 3, 1962 M. H. PAYNE ETAL 3,027,920
WIRE BENDING APPARATUS M. H. PAYNE ETAL WIRE BENDING APPARATUS April 3, 1962 6 Sheets-Sheet 3 Filed March 27, 1957 Win-! April 3, 1962 M. H. PAYNE ETAL WIRE BENDING APPARATUS 6 Sheets-Sheet 4 Filed March 27, 1957 April 3, 1962 M. H. PAYNE ETAL 3,027,920
WIRE BENDING APPARATUS Filed March 2'?, 1957 6 Sheets-Sheet 5 INVENTORS.
@ar/d dwf@ 207/@ April 3, 1962 M. H. PAYNE ETAL WIRE BENDING APPARATUS 6 Sheets-Sheet 6 Filed March 27. 1957 www United States atent thee 3,027,920 WIRE BENDING APPARATUS Matthew H. Payne and Byard D. Simpson, Chicago, Ill.,
assignors to Cedar Rapids Block C0., a corporation of This invention relates to a bending apparatus, and more particularly to a machine for bending wire.
The wire bending apparatus of the instant invention is generally similar to the wire bending apparatus of the copending application of Lloyd Talbot and Byard D. Simpson, Serial No. 343,636, led March 20, 1953, and now issued as Patent No. 2,792,852, and comprises an improvement thereof.
A feature of the present invention is the provision of a bending machine having new and improved means for relaxing of decreasing slightly the amount of tiexnre of the bending arms subsequent to a bending operation, for improved ease in removing the bent wire from the bending arms.
Another feature is the provision of means for adjustably associating the means for bending the arms with the frame and bending arms for effecting improved ease in adjustment and operation of the bending arms.
A further feature of the invention is the provision of new and improved means for moving the wire longitudinally through the machine, comprising a piston operated jaw means operably associated with related machine operating means.
Still another feature of the invention is the provision of new and improved means for removing the bent wire from the bending arms which is operably coordinated with the gripping and bending means.
A yet further feature of the invention is the provision of new and improved means for delivering discrete portions of the bent wire, comprising a delivery table and a new and improved pivotally movable arm means associated therewith,
Other features and advantages of this invention will be apparent from the following description taken in connection with the accompanying drawings wherein:
FIG. l is a schematic plan view of a wire bending machine embodying the invention;
FIG. 2 is a schematic side elevation thereof',
FIG. 3 is an enlarged, fragmentary plan view of a completed wire device formed in the machine;
FIG. 4 is an enlarged, fragmentary plan View of the bending apparatus of the machine;
FIG. 5 is an enlarged, fragmentary plan view of a portion of the bending arm means;
FIG. 6 is an enlarged, fragmentary side elevation of the means for relaxing the bending arms;
FIG. 7 is an enlarged, fragmentary sectional view taken approximately along the line 77 of FIG. 4;
FIG. 8 is an enlarged, fragmentary vertical section taken approximately along the line 8-8 of FIG. 4 showing the bumper means on the bending arm piston cylinder;
FIG. 9 is a view similar to that of FIG. 8 showing another form of bumper construction;
FIG. 10 is an enlarged transverse section taken approximately along the line 14)-16 of FIG. 4;
FIG. l1 is a fragmentary, isometric View of the means for moving the wires laterally relative to the bending means;
FIG. 12 is an end elevation of the delivery means;
FIG. 13 is a horizontal section taken approximately along the line 13-13 of FIG. 12;
FIG. 14 is an enlarged side elevation of the gripper mechanism, with portions broken away;
FIG. 15 is an end elevation thereof;
FIG. 16 is a vertical 4section taken approximately along the line 16-16 of FIG. 14; and
FIG. 17 is a schematic, electro-mechanical diagram of the operating means of the machine.
VIn the exemplary embodiment of the invention shown in the drawings, a wire bending machine is seen to comprise a wire feed means generally designated 10, a knurling device 11, a bending mechanism generally designated 12, a welding mechanism generally designated 13, and a delivery means generally designated 14 including a cutting mechanism 15 for separating the continuous bent wire into discrete portions and a pusher means 16 for moving the discrete portions onto suitable transfer means.
In the illustrated machine, three separate wires 17,
18 and 19 are operated upon by the machine to form a j mortar reinforcing device 2i), such as seen in FIG. 3. welding means 13, which serves to secure wire 18 to each of wires 17 and 19, and cutting means 15 are similar to the welding and cutting means of the Talbot and Simpson application, referred to above, and no further description need be given here. The bending means 12 and pusher means 16 comprise improved modifications of the bending and delivery means of the Talbot and Simpson application, and the improvements therein are. set forth more specifically here following.
Wires 17, 18 and 19 are fed from their respective.
supply spools which are mounted on suitable pedestals, such as pedestals 21 and 22. At the in-feed end of the machine is the knurling means 11 which knurls the Wires asdesired for improved gripping action with the mortar. While center wire 1S may be left unknurled, it is preferred that it, as well as the outer wire 17 and 19, be driven by the knurling means. Thus, each of the wires is fed longitudinally at a substantially constant rate. During the bending and welding operations o n the wires, however, the wire portions in the bending and welding means must be stopped. Thus, a take-up loop in each of the wires, such as take-up loop 19' as seen in FIG. 2, must be provided to accommodate thisv difference in the movement of different portions of the continuous wires.
The means for moving the wires discontinuously in t the machine may best be seen in FIGS. 4, 14, 15 and 16v and comprises a push rod 23 movably mounted on the frame 24 of the machine and reciprocated by means of a suitable piston device 25 (FIG. l) secured to the frame. Extending across the machine at the in-feed end of the bending means is a carrier 26 carrying at one end 26a a support 27 having a removable plate 27a on which central wire 18 may rest.
Means for clamping the wire xedly against plate 27a to move the wire longitudinally with carrier 26 when the push rod 23 is moved, comprises a jaw member 28 pivotally mounted on support 27 by means of a post 29. As best seen in FIG. 14, the jaw is movable alternatively between a wire-released position (shown in full lines) and a wire engaged position (shown in broken lines). The means for effecting this alternative disposition is shown to comprise a piston means 30` having a housing 30a pivotally carried on the support 27 by means of a post 36h. The movable piston 30C Within housing 30a is provided with a piston rod Sild projecting outwardly from the housing and having its outer end pivotally connected to jaw member 28. Biasing means in the form of a spring 30e mounted within the housing acts against the piston to urge the rod inwardly of the housing and pivot the jaw member to the wire released position. A hydraulic supply line 30j serves to deliver hydraulic pressurized uid to the piston to overcome the spring and urge the apaaaao rod outwardly through the housing and the jaw'member into the wire engaging position.
To allow for ready replacement of wearing parts, plate 27a may be removably secured to support 27 by means of screws Zib, and the support itself may be secured to the carrier end 26a by means of screws 2Gb and clamping plates 26C. Further, jaw member 28 may be provided with a removable wire engaging portion 23a secured to the jaw member by means of a screw 2gb and txedly retained in proper position by means of a set Screw 28e. To
retain the jaw member laterally within a carrier recess 26d, a retaining plate 31 is secured across the recess by means of screws 31a.
The means for gripping and moving outer wires 17 and 19A comprise similar jaw member devices carried on a carrier 32 associated with the piston device 25 between the welding means 13 and the `cutting means 15. Each of the jaw member devices is similar, except that the retaining plates of the devices (not shown) on carrier 32 are open adjacent the `wire supporting plate 27a (as the retaining plate would otherwise interfere with the bent wire extending from each of the outer wires and secured thereto in the Welding means). A in the wire released position, push rod 23 may be moved rearwardly (toward the infeed end of the machine), moving carriers 26 and 32 tol a position where they are disposed properly for next engaging the wire.
The jaw members 28 and piston means 25y are arranged to'move the wires intermittently approximately one-half of the time. The remaining portion of the time, the wire portionsv in the machine are retained longitudinally fixed while the bending and welding operation occurs. To take up'the'slack portion of the wire inthe knurling meansv (such as loop'19) 'which accumulates in `the knurling device 11 during the time the wires are held stationary in themachine, piston device moves carriers 26 and 32'in a forward direction (to the left, as seen in FIGS. l and 4) preferably at a rate substantially greater than the rate at which the wires are moved by the knurling means 11. A By correlating the relative speeds' properly, acondition may be obtained wherein'the slack accumulating inH the knurling device is repeatedlyeliminated without altering thespeed of the knurling device, although in prac'- tice some slight adjustment thereof may be required from time to time.`
Referring now more specically to FIGS. 4 Vthrough 1l, bending means 13 is seen to be mounted on a platev33 secured to frame 24 and including an upstandingbearing means 34A rotatably supporting a shaft 35 carrying yat its upper endone end of a bending arm 36. The otherend of'the arm" 36 is pivotally connected at 37 to a second bending arm 38 rotatably supported Iat its other end by a shaft 39. The shaft 39 is mounted in a movable slideV 40 held in an undercut slideway 41.
For retaining the wire 18 removably on arms 36 and 38i`respectively, arm 36 is provided with a pair of guide blocks 42 and 43 mounted at one end of the arm and another pair of guide blocks 44 and 45 mounted at the other end of the arm adjacent pivot 37. Arm 33 is provided with a pair of guide blocks 46 and 47 mounted at theend adjacent pivot 37 and a second pair of guide blocks 48 and 49 mounted adjacent shaft 39.
Wire 18 is yfed -to the arms when they are in the linearly aligned position of FIG. 4 and extends between the respective elements of the guide block pairs. A means 50 for operating or pivoting the arms to bend wire 18 thereon comprises a power plate or lever 56a secured at one end to the end of arm 38 adjacent shaft 39. A piston rod 51 secured to a piston 52 reciprocably carried in a piston cylinder 53 is pivotally connected at 5012 to the power plate Stia. As the piston 52 is moved to the left (as seen in FIG. 4), rod 51 acts through power plate 50a to pivot arm 38 clockwise about shaft 39 and arm 36 counterclocldtwise: about vpivot 35A. Shaft 39 is concurrently moved'to the left by means of slide 49 being moved When jaw member 2S is` through slideway 41 until the bending arms are disposed` in a wire bending position, as seen in dotted lines in FIG. 4.
In order to bend properly the wire l8 to the final desired shape, as seen in FIG. 3, it is necessary, because of the natural resilience of the wire, to overbend the wire slightly. The instant invention comprehends a novel means for effecting this overbending. To this end, piston cylinder 53 is pivotally secured at end 53a to a bar 54 which is clamped to an arm 55 pivotally secured at one end 55a to the frame 24 of the machine. A retaining plate 56 is secured in overlying relationship to the bar 54 by means of suitable bolts 56a which xedly secure the retaining plate to the arm 55. Pivotal movement of arm 55 about end 55a is effected by means of a piston device 57 pivotally secured to the machine frame and having an operating rod 57a pivotally connected to the free end 55h of arm 55. When piston device 57 is actuated, it draws arm end 5511 counterclockwise (as seen in FIG. 4) until bar 55 strikes a stop 58 adjustably retained on the machine frame by means of bolts Sba and 56h (FIG. 7). Piston device 57 is biased to dispose rod 57a in the position of FIG. 4 when the device is not actuated, thereby spacing rod 55 from stop 58'and positioning piston cylinder 53 slightly to the left of the stops, as seen in FIG. 7.
The travel of piston 52 through cylinder 53 is controlled by the abutment of the piston with the end 53h of the piston cylinder through which rod 51 extends. When the piston is disposed at this limit of its travel, the arms 36 and 38 are bent to the maximum and are, in fact, pivoted slightly beyond the position wherein the desired bending of wire 18 occurs. With the piston held against cylinder end 53h, piston device 57 is actuated to move the piston cylinder 53 to the right, as seen in FIG. 4, and, consequently, to move piston 52 within the cylinder slightly to the right, thereby decreasing slightly the amount of pivoting of the bending arms. This functioning is herein referred to as relaxing The specific amount of such relaxing effected is Such that the natural resiliency of the Wire is accommodated, and the wire being formed lies loosely in the guide blocks, whereby it may be easily withdrawn by elevation therefrom.
The wire bending means as disclosed may be utilized for bending wires to produce modified forms of configurations other than that illustrated in FIG. 3. To this end, different bending arms having different lengths may be provided. To limit properly the return movement of piston rod 51, a bumper 53a associated with front end 53h of the piston cylinder 53 is made removable by means of screws 53d to allow the use of different length front ends. Such a modified front end 53e is shown in FIG. 9 as installed on the cylinder. Further, to provide for adjustable positioning of cylinder 53 relative to machine frame 24, the connection of end 53a to bar 54 ismade adjustable by providing a plurality of holes 54a in bar 54 for cooperation with dowel pin 54h retained by retaining plate 56.
The means provided for carrying the wire in the bending means and elevating it subsequent to the completion of the bending operation, comprises a movable frame generally designated 59, which is generally similar to the frame of the Talbot and Simpson application, referred to above. To provide improved correlation of this wire carrying means'with the longitudinal Wire moving means, however, frame 59 is moved vertically relative to machine frame 24 by suitable piston means 60 and 61 through respective piston rods 62 and 63 which are secured at their upper ends to the frame 59. Associated with one ofthe piston rods, illustratively rod 63, is a cam 64 arranged to actuate a pair of switches 65 and 66 associated therewith. Piston means 60 and 6l are arranged to be actuated during the time piston device 25 is actuated to move Athe carriers 26 and 32 toward the infeed end of the machine. The means for eecting this coordinated functioning is described in greater detail in subsequent description of the machine control means.
To elfect an overbend of the wire 18 at pivot shaft 35, a novel bending block structure is provided comprising a finger 67 which is adjustably positioned on a support member 68 rotatably mounted on shaft 35. Support member 68 is pivotally connected to a support member 69 pivotally connected to a second arm 70 iixedly secured to bending arm 38. Thus, as the bending arms are pivoted to the wire bending position, support member 68 is pivoted clockwise about shaft 35 to bring finger 67 into contact with wire 18 and overbend the wire slightly at this point. The degree of overbend achieved during this operation may be `adjusted by positioning a screw 71 through an upstanding flange 72 on support member 68, which screw bears against finger 67 and positions it properly about a retaining screw 73 securing the finger fixedly to the support member.
As discussed briefly above, the completed wire device 29 is fed continuously from the bending and welding portions of the machine to the delivery means 14 where it is cut into discrete portions by the cutting mechanism 15. As best seen in FIGS. l2 and 13, a new and improved pusher means 16 is provided for effecting delivery of the discrete devices to a suitable transfer means shown fragmentarily at 74. Mounted on the lower end of an upright 76 carrying a table top 77 on which the formed wire devices rest, is a pivot member 75. Pivotally carried by member 75 is a pusher arm device comprising a first arm 78 extending generally horizontally `from pivot 75, a second arm 79 fixedly associated with the first arm to extend angularly upwardly from pivot 75 to a point slightly above one side of table top 77, and a third arm 80 extending from the upper end of the second arm to lie generally horizontally a small distance above table top 77. Suitable means 81 and 82 are secured to the outer end of arm 80 for engaging a wire device 29 on the table top and to effect movement thereof as an incident to movement of arm 80 across the table top.
The means for effecting operation of the pusher arms comprises an extensible mechanism` herein disclosed as a piston member 83 having its cylinder `83a pivotally secured at 83b to an arm 84 fixed-ly secured to upright 76 at a point above pivot 75. Piston rod 83C is pivotally secured at 83d to the outer end of rod 78 whereby longitudinal movement of piston rod 83e elects a pivotal movement of arm 78 about pivot 75.
The limits of travel of the pusher arm structure are controlled by a stop member 85 comprising an arm 85a fixedly secured to support 76 at a point below table top 77 to extend generally horizontally. At its outer end, arm SSa is provided with a stop 85h arranged to engage second arm 79 to limit its pivotal movement away from table top 77. A second stop *85C is provided on arm 85a to engage arm 79 and limit its pivotal movement about pivot 75 toward table top 77 Stop 85e is preferably adjustable and is shown to comprise a pin 85d carried on a block 85e threadedly associated with a rod 851 connected to arm 85a by means of supports 85g and 35h. By manipulation of rod 85f relative to block 85e, the positioning of pin 85d may be made proper for accommodating wire engaging means '81 and 82 to the specific device 20 which is to be delivered by means 14.
The operation of the wire bending apparatus may best be understood by reference to the electro-mechanical schematic diagram of FIG. 17. For purposes of illustrating the operation, the arrangement of the control device, as seen in FIG. 17, is shown as at one point in the cycle thereof, namely, at a time when push rod 23 has reacheddifferent points thereon. Thus, the cutting mechanism 15 is operated less frequently than are the bending and welding mechanisms. The first cycle of the operation of the machine described here following relates only to the bending and welding operation.
Electrical power is delivered to the machine from a suitable source through a suitable disconnect means such as double pole switch 86. To simplify illustration of the diagram, one of the secondary leads from the switch S6 is shown grounded at 37, although in practice it should be understood that this lead may comprise an electrical conductor connected to the various points of ground associated with the elements 0f the control circuit. A second lead 88 serves as the opposite side of the line for the various control elements. A normally open switch 89 is connected to lead 88 in series with the movable contacts 99a' of a single pole, double throw switch 90. Contact 96a is normally closed with a contact 90b. When push rod 23 is at the forward end of its travel, it closes switch 89 to energize a solenoid 91 through contacts 90a and 9%. Solenoid 91 is associated with a valve 92 for operation of piston means 60 and 61 to move frame 59 downwardly. Valve 92 is preferably of a type allowing emergency manual operation.
When frame 59 reaches the lower end of its movement, cam 64 thereon closes the normally open switch 65 to energize, from lead 83 and through a set of normally closed contacts a of a relay 95, a solenoid 93 associated with the bending mechanism 12 and a solenoid 94 associated with the welding mechanism 13. Solenoid 93 operates a valve 96 to actuate the piston device associated with the bending arms 36 and 3S to pivot the bending arms 36 and 38 to the wire bending position. Solenoid 94 controls a valve 97 to operate suitable means for moving a pair of welding heads 93 toward each other to clamp the wires to be welded together therebetween. The actuation of valve 97 closes a pressure responsive switch 99 which in turn energizes a suitable timer lili) for controlling a supply of electrical welding energy to the welding heads. The structures of such pressure responsive switches and timers are well known in the art and need no further description here.
A single pole, double throw switch 101 is actuated by the bending arms to close its movable contact 1.01ct with the normally open contact 19117 connected through switch 99 to lead 8S. Contact 161m is in turn connected to the coil of relay 95, and thus relay 95 is energized to open its contacts 95a and close a set of normally open contacts 95h which serve to provide a holding circuit from lead 88 through switch 65.
Also connected to contact 1010 is solenoid 162 controlling a valve 103 associated with the piston device 57 to effect a relaxation of the bending arms7 as described above, and a solenoid 104 associated with a valve 195 for operating piston device 25 to move the push rod rearwardly (to the right, as seen in FIG. l) thereby opening switch 89. Valve 105 is preferably of a type which may be manually operated when desired to eifect emergency operation of the piston device 25 As soon as the bending arms are relaxed from the fully flexed position, they allow contact lilla to leave contact 101b and close with a normally closed contact 101C. It should be noted at this point that the disconnection of contact lilla from lead 8S has no effect on the condition of relay 95 as the holding circuit established through contacts 95b is holding the relay energized. When push rod 23 reaches the rearward end of the travel, it closes a normally open switch 106 which is connected in series with contact 101e to energize a solenoid 107 associated with valve 97 thereby to open or space the welding heads. A normally open switch 108 is connected in series with switch 106 and is arranged to be closed by engagement thereof by the opened welding heads, to energize a solenoid 109 associated with valve 92 thereby to operate piston devices 60 and 61 and elevate frame 59. When cam 64 associated with frame 59 moves to the upper end of its travel, it closes normally open switch 66 which is connected in series from lead S8 through a manually. operable switch 110 to a solenoid 111 associated with valve 105 to operate the piston device 25 and move push rod 23 forwardly. Connected in parallel with solenoid 111 from switch 110 is a solenoid 112 associated with valve-95 to pivot the bending arms to their linearly aligned position for receiving a subsequent portion of wire 18 to be bent. The connection to solenoid 112 is through a manually operable single-pole, double throw switch 113 having its movable contact 113a closable with a contact 113/5 connected to lead 8S, so that the solenoid 112 may be operated manually directly from the power supply when desired.
Having considered the bending and welding cycle, the delivery cycle will now be described. When a sutiicient number of bending and welding operations have been performed on the wires to provide a device 2t? of the desired length, the forward end of the formed device 2d acts on switch 9S to move the movable contact 90a from contact 90b and into con-tact with a normally open contact 90C. At this time the push rod 23 is at the forward end of its travel, and switch 89 is closed, thereby providing power from lead S8 through switch 89 to contact 9de. Connected to contact 96e is a solenoid 114 which cornprises a portion of the punch-press-type cutting mechanism and which causes the cutting mechanism to separate a device from the continuous supply of formed wires. Associated with the cutting mechanism is a cam 115 which is arranged to close a normally open switch 116. Switch 116 is connected in series with a second solenoid 117 effecting operation of a second cutting element of mechanismlS. rlwo such cutting elements are used in the instant device, allowing the separating of two devices 20 during each cutting operation, although it should be understood that thisis merely for improved manufacturing economy, and a cutting mechanism 15 may be provided which will effect one or more separations in one operation as desired.
Associated with the second cutting element is a second cam 118 arranged to close momentarily a normally open switch 119 which is connected in series with contact 9de, and to energize a relay 12o for controlling the pusher means 16. When relay 1Z0 is energized, it closes a set of normally open contacts 12th: which serve as a holding circuit by connecting the relay directly to switch 39.
Concurrently with energization of relay 120, switch 119 energizes a solenoid 121 associated with a valve 122. Valve 122 operates psiton device 83 of pusher means 16 to move arm 8G across table '77 and deliver the operated device Zt) to the transfer means 74. When arm 80 reaches the limit of its movement as determined by adjustable stop 85C, means 80a thereon effect closing of a normally open switch 123 connected in series with a set of normally closed contacts 102b of relay 12)` and a solenoid 12d associated with valve 122 for controlling the valve in opposition to solenoid 121. As discussed above, however, relay 12@ is energized and contacts 12% are open so that no energy is provided to solenoid 124 at this time.
When the cut device 2i) is pushed from table 77 by arm Si), it releases the movable contact 90a of switch 90 from contact 90e and allows it to engage contact 9tlb. Thus, the circuit is reestablished to solenoid 91 through switches 89 and 99, thereby recommencing the cycle of the bending and welding operations described previously. As soon as push rod 23 moves away from switch 89, that switch is opened, and the holding circuit of relay 12@ through contacts 12M thereof is broken. Thus when switch 89 is again closed upon the next return of push rod 23 to the forward end of its movement, contacts 12tlb are closed, and the circuit to solenoid 124 is established from lead 8S, through switch S9, contacts 12%, and switch 123, which last-named switch has been held closed during this time.V Solenoid 12d, thus` actuates valve 122 to cause piston means S3 to return the pusher means 16 'to the posig tion of FG. l2, awaiting the completion of another device 20.
While I have shown and described certain embodiments of my invention, it is to be understood it is capable of many modifications. Changes, therefore, in the construction and arrangement may be made Without departing from the spirit and scope of the invention as defined in the appended claims.
We claim:
l. In a wire bender having a frame, bending means comprising: a pair of arms movably associated with the frame and pivotally connected to form a bending knee; means for removably retaining a wire on the arms; a lever secured to an arm for pivotal movement to operate the arms; power means having a housing and a piston reciprocabiy movable through the housing and provided with a rod connected at its outer end to said lever; means for moving the piston to an extreme position relative to the housing to effect a predetermined amount of pivoting of the arms; and means connecting the housing to the frame and arranged to move the housing, subsequent to the effecting of the predetermined amount of pivoting of the arms, to move the entire power means while maintaining the piston in said extreme position and thereby move the arms to an arrangement of lesser pivoting.
2. ln a wire bender having a frame, bending means comprising: a pair of arms movably associated with the frame and pivotaliy connected to form a bending knee; means for removably retaining a wire on the arms; power means having a housing .fixed at one end to a bar movably carried by the frame and a piston reciprocably movable through the housing and provided with a rod cxtending to outside the housing and associated at its outer end with said arms for eiecting a pivoting thereof; stop means for limiting the movement of the piston relative to the housing to an extreme position proper to effect a predetermined amount of pivoting of the arms; piston means associated with the bar and frame and arranged to move the bar, subsequent to the effecting of the predetermined amount of pivoting of the arms by the rod, and to cause said stop means to act against the' piston and move thc rod to move the arms to an arrangement of lesser pivoting; and means for adjustably limiting the movement of the bar effected by said piston means.
3. Means for delivering bent wire devices, comprising: means for cutting the bent Wire into discrete portions; a table having an upright support and a fiat top for supporting discrete portions of the bent wire; pivot means fiXedly associated with the upright; pusher means pivotally carried by said last-named means and having a first arm extending generally horizontally from the pivot means, a second arm extending upwardly from the pivot means to adjacent one side of the table, and a third arm extending from the second arm to move across the top of the table when the second arm is pivoted about the ivot means; extensible means; means pivotally securing one end of the extensible means to the upright; means.
pivotally securing the opposite end of the extensible means to a free end of the first arm; means operating the last-named means to move tl c pusher means in coordination with the means for cutting the Wire to eiiect a movement of the-third arm across the table top subsequent to a cutting operation; and a fourth arm secured to said support to extend substantially horizontally subjacent the table top with a first stop at one end thereof for abutting the second arm and limiting the movement of the pusher means in one direction, and a second, adjustable stop for abutting the second arm and limiting the movement of the pusher means in the opposite direction to a position wherein third arm is moved across the table top sutiiciently to urge a discrete portion or the bent wire laterally from said table top.
(References ou following'pa'ge) 9 References Cited in the le of this patent UNITED STATES PATENTS Francher et al. June 17, 1930 Borton May 22, 1934 5 Haller Apr. 19, 1949 Blume Jan. 31, 1950 Travis Sept. 22, 1953 10 Ammann et al. Dec. 28, 1954 Powers Oct. 25, 1955 Talbot Nov. 1, 1955 Cootes et al. Oct. 9, 1956 Talbot et al. May 21, 1957 FOREIGN PATENTS Great Britain Feb. 15, 1956
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192963A (en) * 1961-10-27 1965-07-06 Davum Soc Manufacturing lattice frames
US3213898A (en) * 1961-05-01 1965-10-26 Arco Products Inc Wire joint reinforcing making machine
US3310075A (en) * 1964-11-23 1967-03-21 Larkin Sam Automatic machines for forming an intermediate zig-zag wire and welding it to outer parallel wires

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US3213898A (en) * 1961-05-01 1965-10-26 Arco Products Inc Wire joint reinforcing making machine
US3192963A (en) * 1961-10-27 1965-07-06 Davum Soc Manufacturing lattice frames
US3310075A (en) * 1964-11-23 1967-03-21 Larkin Sam Automatic machines for forming an intermediate zig-zag wire and welding it to outer parallel wires

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