US2446608A - Machine for bending wire into ribbon form - Google Patents

Description

Aug. 10, 1948. K. QUEIT ZSCH 8 7 MACHINE FOR BENDING WIRE INTO RIBBON FORM Filed May 2, 1947 v .s Sheets-Sheet 1 Aug. 10, 1948.

Filed May 2, 1947 K. E. QUEI'I'ZSCH 2,446,608

MACHINE FOR BENDING WIRE INTO RIBBON FORM 3 Sheets-Sheet 2 INVENTOR. /\0/"/ E. Que/zzsch Attorneys 1948- K. E. QUEITZSCH 2,446,603

MACHINE FOR BENDING WIRE INTO RIBBON FORM Filed May 2, 1947 5 Sheets-Sheet 3 gwve/wtoa kar/ E. Que/tzsch s a. e n r o r r A M w W Patented Aug. 10, 1948 umr STATES; PAT 1? OFFICE.

MACHINE FOR? BENDINGL WIRE INTO RIBBON FORM? KarLE. Queitzsch,.York, Pa.

Application May 2% 1947-, SerialsNm: 7.4553 65 -Claims.- (Cl. 140-71)" This invention relates. to wirebending'. machines, and" more particularly to a device for bending wire into ribbon form for use in electricalheating devices and the like main object of the invention istoprovide a novei and improved'wi-re'bending machine which isvery si mplein construction; eflici-ent in opera.-

Figure- 2 isa vertical longitudinal cross-sectional'view taken-on line 2-2 of Figure 1.

Figure -3-is a vertical transversecross sectional view taken on line 3-3 of Figure-2.

Figure' is a detail view illustrating-the position of the wire bending elements of the machine-in a positionsuccessive tothe position shown in FigureB.

Figure 5 i-llustratesa-position of the-wire'bend ing'elements successive to that shown in Figure 4.

Figure 6' is a cross-'sectionalview taken ctr-line"- Figure '7 is a cross-sectional view similar to- Figure 6 but showingthe wire bending elements of*the machine in the positions of Figure 4:

Figure 8 is a cross-sectional view similar-to Figure 6 but showing the wire bending elements of the machinein'the positions of Figure&

*Ref'erring to the drawings H designates a base plate having securedthereto a forward vertical end plate I! and arear vertical end plate I-3+ parallel to andaligned withihe forwardplate F2 Secured to base-plate H parallelt'o the end plates isa first inner vertical plate l4- adjacent-to endplate [2 and a second'vertical' plate l5- intermediate plates' 13 and 1'4. Journalled in plates Ill-and iiis a horizontalshaft lli extend-inglongi tudinally-of base plate H and carrying at its outer' end apulley ll'rigidly secured thereon. Rigidl'ysecured on shaft I 6 adjacent plate l5i-s a -piniongear 8. Rigid-1y secured' on said shaft inwardly" a'djaeent end; plate 13- isabeari ng collar L9; Gear I8 and collar l9" preventendwise movement of J'ournalled in plates-Mariam andlongitudniai-- 1y slidable therein. are a pair of horizontal longitudinalshafts zltand 2 Rigidlysecured to the-rear end-of shaft 20 is a'pinion gear 22 meshing withgear I18- and likewise rigidly secured to the rear end of shaft 2|w is a pinion gear 23 equivalent to and meshing with gear 22. adjacent--plate M- is: a collar 24 and encircling shaftlit israi coil spring-ii beari-ng, between'collar 24--andplate I 5. A similar coilspring 2 B: encircles,-

shaft 2 land bears between a collar 2:1: secured, ta

shaft 2 hand the plate [5; Therspr-ings-fi and-26- bias the respective shafts 2B and; 2|.- forwardly; Gears 18, Hand Zia-are of substantial peripheralwidth .so that shafts: 20-- and.- 2 I may move longitudinallyfor. substantial distanceswithout disengaging;- the, gearsyfrom their meshing. relation It will. be alsoapparent that when shaftship;

I6 is: rotated; shafts-28.: and ZI- rotate inopposite:

directions-r.

Base plate- H is'form-ed adjacent end pla'te. i=2,

with a transversely extending notch 28 which is centeredwithrespeet toshatts 2% and'H. Notch; 2& defines with respect; to end plate l2: a trans:- verseslotathroughwhioh wires-took bent to ribbon. formemerges from the machine, as will be-subse-- qiiently: described;

Passing through end: plate 1-21 and symmetri cally located-with respect to the centrallongitudirial; vertical plane of themachine-are a pain ofstuds 29 and 30. Stud 29 is provided with-- ax rectangular head 31 and stud 30 is providedewith a similar rectangular head 32. Theouter end; portions; of studs- 29: and 30 are: threaded-and; en

gaged thereon arerespeotive nuts 3'3-and 3k. ends-of the-studs are-received1 in recesses formed in a horizontal bar member-"35 which isadjustably seoured-torend-pl-atel2 bya pair of screw bolts 3&,; 31 passing'througlrthe': bar member andathrea'dr edly engagedu'withend plate l2. Bar member'35 cooperates: with nuts 33 and 34 to lock studsrfll and 30 in an adjusted longitudinal position;

Pivoted to heads 3 land-132- is" a horizontal" bar saw the intermediate: portion of which. is secured a 'clamping pvlate'l39. Clamping plate-Stildsverti cany aligned with notch 2 8i and. isspaced: from:

end? plate. it assufficient distance lo permit. freev movement therebetween: of a; ribbon of formed.

wire whenfltheclamping plate is free. Whenfthe top end of the clampingplateis rotated'counterclockwise as viewed in Figure:2 said topend is efiectivetosclampthe wire toend plate l2;

Strait 20 carries at its forward end a forming arm 48 extending at right angles to the shaft.

Arm: w is beveled along its length at 4 l" and is formed with a narrow rib: 42 at the edge thereof Secured to shaft 2fli6 is rotated. The rear top surface of clamping plate 39 is smoothly curved, as shown at 44, so that as each forming arm rotates past the top edge of plate 39, the bevel on the-arm slidesonto curved surface 44 causing the arm and its carry-- ing shaft to be moved rearwardly against the pressure of its biasing spring. When one arm has been thus moved rearwardly it provides clearance for the other arm and at the same time exerts clamping pressure on the top portion of clamping plate 39., ,After the arm leaves curvedsurface 44 there is a short intervalduring which the clamping plate 39 is free, whereby the wire stock may bepushed downwardly a distance correspondingto the distance between bends by the opposing forming arm as said opposing arm completes its bending stroke. v

I Figures 3 and 6 show forming arm 40 in raised vertical position and engaging the wire stock 45 at the beginning of a bending stroke. The formed portion of the wire shown at 46 is meanwhile clamped between plate 39 and end plate I2 by forming arm 43 which is inits rearwardly pushed depending position. As the arms rotate in the directions indicated by the arrows, arm lfl bends the wire to a horizontal position; the wire being engaged by the rib 42 on said arm during the bending operation. Ann 43 meanwhile rotates to a horizontal position, as shown in Figures 4 and 7, and at this time clamping plate 39 is free, whereby the wire may be moved downwardly into position for the next stroke. Arm 43 then rotates to a vertical position into engagement with the wire and arm 40 rotates to a depending position bearing on clamping plate 39 to hold the wire rigid while arm 43' moves through its bending stroke. Figures 5 and 8 show the position ofthe parts as arm 43 begins its bending stroke.

The wire 45 is continuously fed downwardly between the bending arms and emerges through notch'28 under base'l I in ribbon form.-

; 'Ihe'downward movement of 'the'wire is automatically obtained by the downward thrust imparted thereto by the forming arm as it completesits bending stroke,the opposite forming arm being at that'time out of contact with the clamping plate 39. Immediately after this trust is delivered the forming arm comes into engagement with curved surface 44 and clamps the wire.

The required free period of the clamping plate 39 is insured by providing a corner bevel 41 at the heel portion of each forming arm -While a specific embodiment of a wire ribbon means, said shafts being normal to said support,

means biasing said shafts toward said support, a first forming arm carried on the end of one of the shafts, a second forming arm carried on the end of the other shaft, means for rotating said shafts in opposite directions and arranged so that said forming arms move inwardly in alternate sequence, said forming arms slidably bearing on said support during inward movement thereof, and a clamping'plate pivoted to said support, said plate being spaced from the support at its pivotal plane,

each forming arm being arranged so as to engage -said plates at the termination of its inward movement so a t exert clamping pressure on said plate.

2. A machine for bending wire stock into ribbon form, comprising a vertical support, bearing means-adjacent. said support, a pair of shafts rotatably and slidably mounted in said bearing means,- said shafts being normal to said support, means biasing the ends of the shafts into contact with thesupport, a first wire bending arm carried on the end of one of the shafts, a second wire bending arm carried on the end of the other shaft,

gear means coupling the shafts together for opposite rotation, said gear means being formed and arranged so that said wire bending arms move inwardly in alternate sequence, said arms slidably bearing on said support during inward movement thereof, and a clamping plate pivoted to said support on an axis parallel to the support and to the plane of said shafts, said plate being spaced from the support at its pivotal plane, each arm being formed and arranged so as toclampingly engage said plate following the termination of its arc of inward movement.

3. A machine for bending wire stock into ribbon form, comprising a, vertical support, bearing means adjacent said support, a pair of shafts rotatably and slidably mounted in said bearing means, said shafts being normal to said support, means biasing the ends of the shafts into contact with the support, a first wire bending arm carried onthe end of one of the shafts, a second wire bending arm carried on the end of the other shafts, means coupling the shafts for counter rotation and arranged so that said arms move inwardly in alternate sequence, said arms slidably bearing on said support during inward movement thereof, and a clamping plate pivoted tosaidsupport on an axis parallel to the support below and parallel to the plane of said shafts, said plate being spaced from the support at its pivotal region each arm being formed so as to cammingly engage said plate following the termination of its arc of inward movement to move the arm away from the support and to exert clamping pressure on the bearing meansnormal to said support, means biasing the ends of the shafts into contact with the support, means for driving the shafts in counter rotation, a first wire bending arm carried at the ends of one. of the shafts, a second wire bending arm carried at the end of the other shaft, said armsbeing arrangedto move inwardly in alter nate sequence and slidably bearing on the support during such inward movement, and a clamping plate pivoted to the support below the plane of said shafts, said clamping plate having a, cam surface arranged so as to becammingly engaged by an arm immediately subsequent to the terminanof th nw rd mov ment ofthe arm. the arm being moved rearwardly and exerting pressure on the plate as a result of such engagement, whereby a piece of wire may be clamped by the plate while it is being bent by the other arm.

5. A machine for bending wire stock into ribbon form, comprising a vertical support, bearing means adjacent said support, a pair of horizontal shafts rotatably and slidably mounted in said bearing means normal to said support, spring means biasing the ends of the shafts into contact with the support, means for driving the shafts in counter rotation, a first wire engaging arm carried at the end of one of the shafts, a second wire engaging arm carried at the end of the other shaft,

said arms being arranged to move inwardly in 15 20 that each arm cammingly engages the plate immediately subsequent to the termination of in- 'ward movement of the arm to push the arm and its shaft rearwardly and exerting clamping pressure on the plate, the arm being further formed to release the plate shortly before the other arm ter- 5 minates its inward movement.

KARL E. QUEITZSCH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 468,301 Cooper Feb. 2, 1892 820,510 Mallett May 15, 1906 1,966,256 Marinsky July 10, 1934 2,305,266 Lincoln Dec. 15, 1942 FOREIGN PATENTS Number Country Date 202,072 Great Britain Aug. 16, 1923

Images