US2684087A - Machine for making wire fabric - Google Patents

Description

R. F. STOCKTON MACHINE FOR MAKING WIRE FABRIC July 20, 1954 2 Sheets-Sheet 1 Filed March 51, 1951 July 20, 1954 R. F. STOCKTON MACHINE FOR MAKING WIRE FABRIC 2 Sheets-Sheet 2 Filed March 51 1951.

Patented July 20, 1954 UNITED STATES PATENT OFFICE MACHINE FOR MAKING WIRE FABRIC Raymond F. Stockton, Sunland, Calif.

Application March 31, 1951, Serial No. 218,583

7 Claims. 1

This invention relates to wire working machinery and particularly to an improved machine for forming wire mesh fabric.

An object of the invention is to provide a machine adapted to form a single strand of wire into a wire mesh fabric and which may be adjusted to vary the mesh characteristics of the fabric.

Another object of the invention is to provide a machine for forming a fabric from a single strand of wire comprising means for continuously forming a helix and means for simultaneously laterally and uniformly displacing the coils of the helix at the end opposite the helix forming means and welding the laterally displaced coils with resultant production of a wire mesh fabric.

With the foregoing objects in View, together with such other objects and advantages as may subsequently appear, the invention resides in the parts, and in the construction, combination and arrangement of parts as well as in such modifications thereof as may be suggested to others skilled in the art by the following specification of a practical mode of execution of the invention, reference being had to the accompanying drawings which form a part of said specification and in which drawings:

Fig. 1 is a side elevation of a machine adapted to execute the method of the invention and to produce the single strand wire mesh fabric which constitutes one part of the invention; certain portions being broken away for clearness of illustration,

Fig. 2 is a fragmentary sectional View taken on the line 2-2 of Fig. l with certain parts broken away.

Fig. 3 is a top plan View of the machine shown in Fig. 1,

Fig. 4 is an enlarged, fragmentary, end elevation (somewhat diagrammatic) of the welding means and the feed means associated therewith, and

Fig. 5 is a side elevation of a section of a representative single strand wire mesh fabric produced by the machine disclosed in the preceding figures.

Referring first to Figs. 1 to 4, the machine comprises a frame structure including four upright members I, 2, 3 and 4 arranged in plan in rectangular formation. At their upper ends the members I and 2 are connected by a pair of cross members 5 and 5', while the members 3 and l are similarly interconnected by a cross member 6. Adjacent their midpoints, the cross members 5' and 6 are interconnected by spaced cross bars I and 8. The members I and 2 at a point slightly below the upper ends thereof are interconnected by a cross member 9 while the members 3 and 4 are similarly interconnected by a cross member I0. Adjacent their lower ends, the members I and 3 have attached thereto one end of a laterally extending member I I, the other end of which projects beyond the outer vertical face of the frame defined by the members I and 2 and a similar member I2 is similarly connected to the members 2 and 4. The members I and 2 each also have connected thereto slightly above the members II and [2 a second pair of laterally extending members I 3 and I l, respectively, which extend parallel to the members II and I2 and at their free ends the members II and I3 are connected to a post I5 while the free ends of the members I2 and I4 are similarly connected to a post I6. Additionally, the members I and 2, 3 and I, and posts I5 and I6 are interconnected at their lower ends by cross members l1, l8 and I9 respectively. The above described portion of the frame structure can be readily formed from angle iron elements assembled as above and preferably welded at the joints. Other equivalent frame construction may be obtained by the use of castings or by a wooden frame, but the above mode of construction will be found to be economical to build and to have ample strength with a minimum weight.

Mounted near the upper end of the frame portion defined by the members I, 2, 3 and 4 is a vertically disposed hollow cylinder 20 with a slightly flared lower end 2!. Attached to the outer surface of the cylinder at diametrically opposite points are a pair of bracket members 22 and 23 which are bolted to top surfaces respectively, of the cross members 9 and I!) (see Fig. l) and which locate the axis of the cylinder substantially coincident with the vertical center line of the portion of the frame structure in which the cylinder is located (see Fig. 3).

Mounted in a plane slightly above the upper end of the cylinder 20 and disposed coaxially with respect thereto is a bearing 24 having a removable cap 25. The bearing includes outwardly diverging legs 26 and 2'! which are bolted to the inner faces of the members 2 and i. A hollow shaft 28 is mounted in the bearing 2d and is held against endwise movement therein by the opposed faces of a belt pulley 29 mounted on the shaft above the bearing and a thrust collar 30 mounted on the shaft below the bearing 2 The shaft 28 below the thrust collar extends into the cylinder 26 and below the upper end of the cylinder the shaft is bent about a relatively wide radius to form an outwardly and downwardly extending arm portion 31 which terminates above the flared portion H of the cylinder and a slight distance inwardly of the inner wall of the cylincler (see Fig. 1). Also the shaft 28 in the region of the bend therein has fixed thereto an outwardly and oppositely divergent finger 32, the distal end of which is located in close proximity to the inner wall of the cylinder 20 in a plane slightly below the plane of the end of the shaft 28.

The cross bars '5 and 8 of the frame structure are formed of angle irons disposed with the horizontal flange portions '5" and 8' thereof extending toward each other in the same horizontal plane and with the vertical flange portions thereof depending below said plane. The upper end of the hollow shaft 28 extends above the hub of the pulley 29 and terminates slightly below the under faces of the flanges i and 8 (see Fig. 2). Mounted on the cross member flange i is a pair of spaced, aligned, bearing brackets 33 and 34 in which a shaft 35 is mounted for rotation. Fixed to the shaft 35 and extending between the adjacent faces of the bearing brackets is a toothed roller 36; the engagement between the ends of the roller and the bearing brackets serving to hold the shaft against endwise movement. The shaft 35 extends a short distance beyond the outer face of the bearing bracket 34 and at its end carries a pulley 36 connected by a belt 31 to the driven pulley 33 of an infinitely variable speed transforming unit 59 the driven pulley 40 of which. is connected by a belt s! to the pulley 42 of a driving motor As best shown in Fig. 3, the motor t3 and the speed transformer may conveniently be mounted on the horizontal. flange portions of the cross members 5 and 5. The pulley 29 on the hollow shaft 28 is likewise connected by a belt 'M to the driving pulley 45 on a second motor 46 mounted on a plate 41 fixed to the upright members '2 and l of the frame structure (see Fig. 3).

Mounted on the cross member 8 directly opposite the bearings 33 and 34 are a pair of brackets 68 and it each having a bore therein adapted to slidingly receive the shanks (i9 and 58 of a pair of bearings and 52 in which a shaft 53 carrying a pinch roller 55 is mounted. Springs 5.5 and 55 are mounted on the bearing shanks 49 and 50 constantly urge the roll r 54 against the roller 36. The rollers are so positioned that they meet substantially in a vertical plane containing the axis of rotation of the shaft 28 (see Figs. .2 and 3). The rollers 36 and Fi l draw a wire W from a source of supply (not shown) over an idler pulley 5? carried by a bracket arm 58 mounted on the frame structure and feed it into the hollow shaft 25. As the shaft 28 is rotated the bent portion 3| thereof will cause the wire fed into it by the rollers 36 and E5 to be laid in a coil within the cylinder as shown in Fig. 1 and if there should be any tendency for the coil to stick within the cylinder, the follower arm 32 will force the coils toward the flared lower end of the cylinder. Since it is necessary that the rate of Wire feed be closely related to the linear rate of coil formation within the cylinder, the drive for the roller 36 is made variable by the interposition of the unit 3:": on which a hand knob 59 may be operated to vary the speed of the roller 36. The speed transformer may be installed on the drive for the shaft 2d, if desired, or it may be accomplished by variable speed motors; the only essential being that at least one of these two drives be infinitely variable to obtain correlative rates of wire feed and of coil formation for each type of wire or other condition that may be met. Alternatively, a single motor may be used for both drives with appropriate driving connections, but the provision of separate motors as here shown is believed to make the simpler and more readily maintained construction.

Fixed to the outer faces of the frame members I and 2 adjacent the juncture of the frame members l2, and I6 therewith is a pair of bearings 6-0 in which a shaft 6! carrying anidler pulley 62 is mounted and fixed to the inner faces of the members l3 and M at about their midlength, and disposed below the lower edge of said members is a second pair of bearings 83 arranged in parallelism with the bearings A shaft 64 is journalled in the bearings having fixed thereto and extending between the bearings a second pulley 65 which is of the same width as the pulley 62. The shaft extends beyond the outer face of the bearing 63 carried by the member l4 and has fixed thereto a pulley 66 connected by a belt 61 to the driven pulley 68 carried by the driver shaft 68' of a variable speed transformer 69 of the same general type as the transformer 39 and which has a driving pulley 18 connected by a belt H to a motor 12 having a pulley T3. Trained about the pulleys 62 and 65 is a conveyor belt 74 having the outer surface provided with a series of stud-like projections 15; the projections bein arranged in spaced curved rows having a curvature about the same as the curvature of the coils formed by the shaft 28 within the cylinder 20 as previously described. Extending between the frame members i and 2 slightly above the bearings 50 is a rod 16 on which the lower end of an adjustable chute element TI is mounted. As shown in Fig. 1, this chute element extends upwardly and rearwardly from its lower end and terminates beneath and slightly spaced from the lower end of the cylinder 20; the upper end of the chute being supported for vertical adjustment by a bracket arm 18 having one end pivotally connected to the bottom of the chute and the other end laterally offset and connected by a bolt 19 for vertical adjustment along a slot in the member 4.

Mounted on the upper faces of the frame members i i and I2 adjacent their connection with the post elements it and I6 is a pair of bearings 80 in which a shaft 8| is journalled. Fixed to the shaft 3i and extending over the major portion of the width of the space between the bearings 88 is a first welding roller 82. The shaft 8! ex tends beyond the outer end of the bearing 86 carried by the member [2 and carries a pulley 83 connected by a belt 84 to .a second pulley 35 carried by the speed transformer driven shaft 68': the pulleys being of such size that the conveyor and welding roller are driven at the same linear speed Cooperating with the driven welding roller 32 is an idler welding roller 35 carried by a shaft 37 journalled in bearing blocks 88 slidably mounted in guide blocks 89 fixed to the upper faces of the frame members 3 and It and including compression springs to reacting between cap members 9| and the bearing blocks 33 to urge the roller toward the roller 82. The welding rollers at one end thereof are provided, respectively, with spring biased brush contacts 92 and 93 affording electrical conn ction through leads 94 and 35 with a suitable source of welding current.

The operation of the last described portion of the machine is believed to be clear. As the coiled wire drops out of the cylinder 29, it slightly extends by reason of its weight and contacts the chute element 11 which urges the coils C laterally as they move downwardly and the coils are thus deposited on the upper face of the conveyor belt M as it comes up over the idler pulley 62 and the projections 15 on the belt engage the rear portions of the successive coils and space them for entry between the welding rollers 82 and 86 (see Figs. 3 and 4). As the coils pass between the rollers, the wires are electrically welded together at each intersection with resultant production of a wire mesh fabric such as illustrated in Fig. 5. If the speed of the conveyor and Welding rollers is slightly increased relative to the rate of coil production by adjustment of the speed transformer 69 and a conveyor belt having correspon ingly wider spaced projections is employed, the pattern will be somewhat different, and if a slower rate and corresponding conveyor belt is employed a finer mesh fabric will be produced.

Thus, there has been achieved a machine adapted to produce a continuous wire mesh fabric from a single wire and there has also been provided a new type of Wire mesh fabric and a novel method by which the fabric may be produced. While a machine such as disclosed above is the most efficient mode of practice of the novel method, the method can also be practiced by forming the initial helix on a mandrel, then stripping the formed helix from the mandrel then feeding the flattened and laterally offset coils through a pair of welding rollers or fixing the coils in a suitable holdin fixture and separately welding the wires together at each intersection. The above described steps are believed to be such that those skilled in the art will be able to follow these suggested alternative modes of practice of the novel method without the necessity of further illustration.

The resulting fabric is both neat in appearance and strong. It is particularly to be noticed that at its edges the wire lies substantially parallel to the length of the fabric and that the closeness of the overlapping portions of the wire gives a tension resisting factor at each edge that is practithereby imply that the invention is to be considered limited to the foregoing disclosure, but the invention is contemplated to include all such modifications of the machine, its parts and their construction and arrangement as shall come within the purview of the appended claims.

I claim:

1. In a machine for forming a mesh fabric from a single length of wire, the combination of, means for continuously feeding a wire into the machine, driving means for said wire feeding means, helix forming means comprising a rotating guide and a stationary cylinder open at both ends and having an inner wall disposed in adjacency to the path of said rotating guide; said guide receiving wire from said feeding means and directin it against said cylinder wall with resultant formation of the helix, and means for rotating said guide; means for effecting adjustment of the relat1ve speeds of said wire feeding means and said rotating guide to bring them into synchronism with respect to the passage of wire therethrough, means continuously operative to discharge the helix coils from said cylinder, a continuously unidirectionally operating conveyor spaced from the discharge end of said cylinder, guide means interposed between said cylinder and said conveyor operative to direct coils from said cylinder to said conveyor, means operating in conjunction with said conveyor eifective to arrange the coils on said conveyor in uniformly spaced, overlappin relation, roller welding means continuously receiving the overlapping coils from said. conveyor, Welding them to each other at all points of intersection, and discharging the finished fabric from the machine, a driving means for operating said conveyor and said roller welding means at identical linear rates of travel, and a speed adjusting means in said last-named driving means operable to adjust the speeds of travel of said conveyor and roller welding means to conform to the rate at which the helix coils are formed and. delivered and the spacing of the delivered coils effected by said coil spacing means.

2. A machine as claimed in claim 1 in which the wire feeding means comprises a pair of pinch rollers, a driving motor for said rollers, and a variable speed transformer interposed between said motor and said pinch rollers.

3. A machine as claimed in claim 1 in which the coil forming cylinder is disposed with a vertical axis and in which the coil forming guide is mounted for rotation in a bearing coaxially disposed with respect to the axis of said cylinder and located at the upper end of said cylinder.

4. A machine as claimed in claim 3 in which the wire feeding means comprises a pair of horizontal axis pinch rollers disposed above the stationary cylinder with the meeting faces of said rollers disposed in a vertical plane containing the axis of the cylinder and in which said rollers are operatively connected to a motor through an interposed manually variable speed transforming means operable to vary the rate of wire feed to conform to the rate required by the rotating guide means in the formation of coils.

5. A machine as claimed in claim 1 in which the coil discharging means comprises an arm rotating with the coil forming guide and disposed substantially diametrically opposite thereto and having a distal end disposed below the plane of said rotating guide and in close adjacency to the inner wall of the coil forming cylinder.

6. A machine as claimed in claim 1 in which the coil spacing means comprises spaced lugs on the coil engaging face of the conveyor.

7. A machine as claimed in claim 1 in which the conveyor comprises an endless belt trained about spaced horizontal pulleys and is disposed below and at one side of the stationary cylinder and in which the guide means between the cylinder and conveyor comprises a chute extending diagonally downward from the lower end of the cylinder to the coil receiving end of the conveyor.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 643,994 Turner Feb. 20, 1900 863,482 Young Aug. 13, 1907 963,512 Butterworth July 5, 1910 1,232,014 Edwards July 3, 1917 1,317,726 Pratt Oct. 7, 1919 1,743,690 Sellers Jan. 14, 1930 1,803,144 Pink Apr. 28, 1931 1,859,784 McMurray May 24, 1932 2,062,552 Burgess Dec. 1, 1936 2,072,554 Greene Mar. 2, 1937 2,423,896 Lave July 15, 1947

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