US979457A - Wire-nail machine. - Google Patents

Description

J. H. FRANCIS.

WIRE NAIL MACHINE.

APPLIUATION FILED APR. 15, 190s.

979,45*?. Patented Beaz?, 1910.

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J. H. FRANCIS.

WIRE NAIL MACHINE. APPLICATION FILED APE.15, 1908.

@9,45% Patented 1560.211910.

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UNITE @TAS P FNT JOHN H. FRANCIS, 0F CLEVELAND, OHIO, ASSIGNOR TO THE KILBY MANUFACTURING COMPANY, CF CLEVELAND, OHIO, A CORPORATION OF OHIO.

WIRE-NAIL MACHINE.

Specification of Letters Patent.

Patented Dee. 2?, 19M).

Application i'led April 15, 1908. Serial No. 427,177.

To alt yw/wm t may concern:

Be it known that I, Jol-IN H. FRANois, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in VVire-Nail Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to machines for making wire nails and has for its object to improve the operation of the feeding mechanism whereby t-he wire is advanced toward the anvil and particularly to the arrangement and construction of such mechanism whereby the feeding movement of the wire will positively cease at a certain point before the engagement of the cutters therewith, not-withstanding the fact that the machine is being operated at high speed.

In various other machines of this type with which I am acquainted, that is, machines wherein a crank is employed to operate t-he feeding mechanism, the parts have been so constructed that the wire was fed or advanced by the rearward movement of the crank and released by tripping the gripping mechanism before the crank reached its rear center. l/Vhen the machines thus constructed were running at high speed, there was irregularity in the lengths of the nails, due to inability to release the wire at the same point of the stroke. By my construction and arrangement of parts, the wire is released always at the same point and is advanced and released within an angular movement of l5() degrees or less of the drive or crank shaft from its front center, thereby insuring uniformity in the lengths of the nails and preventing the cutting knives from engaging the wire until after its forward movement has been completed. I accomplish these results by means of comparatively simple and inexpensive mechanism which will be described hereinafter.

Generally speaking, the invention may be defined as consisting of the combinations of elements embodied in the claims hereto anneXed and illustrated in the drawings forming part hereof, wherein- Figure l represents a plan view of a machine having' my invention applied thereto; Fig. 2 represents an enlarged plan view of my mechanism and of the co-acting parts of the machine; Fig. 3 represents a side elevation of the construction illust-rated in Fig. 2; and Fig. 4 represents a somewhat diagrammatic view illustrating the movements of the feeding mechanism by the rotation of the crank shaft.

Referring to the drawings by reference characters, l denotes the bed plate of a wirenail machine, the same being supported by means of brackets 2.

3 denotes the anvil block having a longitudinal aperture l therethrough for the passage of the wire. The anvil block is provided in the rear face thereof with a die block 5 carrying the holding dies 6 and 7. Holding die 7 has a pair of operating rods 3 and 9 connected thereto, the former havmg its outer end operatively engaged by a screw l0 extending through the forwardly projecting arm of an angle lever l1 mounted on a vertical pivot l2. Rod 9 extends across the said arm of lever ll and has a screw 13 threaded therethrough and bearing against the outer face of such lever arm. The inwardly projecting arm l]a of lever ll is connected to a rock shaft 14 by means of a connecting rod l5. lll denotes a rearward extension of lever ll which is engaged by a spring 16 tending to force the front end of said lever outwardly. Rock shaft 14 is mounted in suitable bearings in brackets 17 and is provided with a rearwardly projecting rock arm 18 having at the rear end thereof a fork for the reception of a roller 19 which rests upon a cam 2O carried by' the main shaft 21. This shaft is provided with a suitable drive pulley 22 at one end thereof and with a fly wheel 23 at the opposite end thereof and is mounted in suitable bearings carried by bed plate l. Near the middle portion thereof, shaft 2l is provided with a reciprocating device, preferably a center crank 24, which is connected by a suitable pitman 25 with the hammer stock 26. This stock is provided at the front end with the heading punch 27 and intermediate of its ends with oppositely-projecting lateral lugs 28 each having a roller 29 therein adapted to engage the inwardly curved rear ends of the cutting levers 30. These levers are mounted on vertical pivots 3l and are each provided with an adjustable cutter 32.

In front of anvil block 3 there is mounted position shown in Fig.

the feed block 33. This block is mounted on an inwardly projecting arm 34 and comprises a pair of vertical rollers 35 each mounted upon a rearwardly and outwardly inclined surface 3G. The wire is gripped between the rollers and a flat plate 3T, the arrangement being such that, as the feed block moves toward the anvil block. the wire will be gripped by reason of the rollers moving inwardly on the inclined surfaces 36 and will be released when such movement of the feed block is reversed by the movement of the rollers outwardly on said inclined surfaces. Arm 34 is mounted on a block 3S which is longitudinally slidable upon bed plate l.

For the purpose of operating the feed block, l provide the following construction: 39 denotes a transversely extending rock shaft which may be mounted in bearings on bed plate l. This shaft projects inwardly beyond the hammer stock 26 and is provided, beneath said hammer stock, with a rearwardly projecting lever arm 4() rigid therewith. This arm is flexibly connected with hammer stock 26 by means of a link 4l which is pivotally connected at one end to a pair of downwardly projecting lugs 42 on the hammer stock and at its opposite end to the rearwardly projecting end of lever arm 40. At its outer end, shaft 39 is provided with an upwardly projecting lever arm 43 which is connected to arm 34 by means of a link rod 44. ln order to vary the eect of lever arm 48 on the feed block and thereby accommodate the feeding mechanism to various lengths of nails, the rear end of link rod 44 is connected to arm 48 by means of a sliding` block 45 mounted in a vertically extending guideway 46 in arm 43, said block being provided with an adjusting screw 4T whereby its position in the said guideway may be varied.

In the full-line position illustrated in Fig. 4, the parts are shown in the positions which they occupy when crank Q4 is at or near its foremost position. In 2 and 8, the parts are shown in the positions which they occupy when the crank is in front of its shaft but not atits front center.

lVith the parts arranged and constructed as described thus far, it will be apparent that, as the crank moves from the rear center to the front center, the hammer 26 will be moved forward and the heading punch will head the wire which has been fed through the holding dies 6 and 7, the rotation of shaft 2l causing the die-pushing rod 8 to force die 7 inwardly and grip the wire firmly against the opposing die 6 before the engagement of the punch with the wire. The reverse movement of the shaft causes link 4l to pass from the forwardly inclined 4 to the substantially vertical position shown in dotted lines in said figure, rocking shaft 39 and moving the feed block 33 rearwardly. By the ar rangement to be described more particularly hereinafter, this feeding movement ceases before the cutters 32 are forced against the wire by the engagement of rollers 29 with lever arm 30. Meanwhile, the elevated part of cam 2O has moved from beneath roller 19, and spring 1G has moved the front end of lever ll outwardly, thereby pulling the holdi ing die outwardly through rod 9 and permitting the feeding of the wire by the feed block. At the end of the rearward stroke of the hammer stock, when the crank 2l reaches its rear center, rollers 29 force the rear ends of the levers 30 outwardly, causing the cutters 32 to sever the headed wire which has been fed through the anvil block.

The manner in which the feeding of the wire is suspended a sufficient time before crank shaft 24 reaches its rear center to prevent any movement of the wire after the engagement of the cutters therewith will now be explained with particular reference to Fig. 4. In this view, the full lines indicate the positions assumed by the parts when the crank shaft is on its forward center and the dotted lines the center lines of the pitman, lever arms 40, 43 and link 41. Then crank shaft 2l is on its forward cen ter, link 4l makes a considerable angle with a vertical line passing through its point of connection with arm 40 and arm 43 also makes an appreciable angle with a vertical line drawn through its rock shaft 89. `When the crank is on its rear center, arm 40 is in the position shown by the dot-ted line c, arm 43 is in the posit-ion shown by dotted line b and link 4l is in the position shown by dotted line c, which forms a very slight rearward angle with a vertical line cl extending upwardly from the rear end of arm 40. Line e is a line which extends upwardly and forwardly from the rear end of line a and forms an angle with line Z equal to the angle formed by line c. The distance between lines c and e along the line which extends rearwardly from the upper pivot of 4l represents the distance traveled by said upper pivot while the crank is traversing the angular distance between lines f and g. These lilies make an angle of about degrees each with the line of movement of the hammer stock. Owing to the length of link 4l, when said link is near the rear end of its stroke the link extends at substantially right angles to the throw of the operating member for the same; that is to say, at substantially right angles to a line defined by the extreme forward and rearward positions of the operating member. ln the exemplification of the invention shown herein, the crank is the operating member and the link 4l is in this position when in a near/ly vertical line with its lower pivot and, when in such position, the oscillation of the arm 40 and arm 43 while the link 41 is oscillating between a and c is negligible. In fact, such oscillation will be easily compensated for by the lost motion between the parts and the lines a and b represent the positions maintained by arms 40 and 43 respectively while link 41 is moving` between e and c. The result is that the rearward movement of arm 43 and consequently the rearward or feeding movement of the feed block is suspended for a material interval of time both before and after the crank passes its rear center, affording ample opportunity for the cutting of the ends of the wire by the cutters after the cessation of the feeding movement of the wire, no matter at how high a speed the machine may be operated.

As will appear from F 4, arms 40 and 43 are at nearly right angles to each other, the angle therebetween being about 96 degrecs, which I have found, with the other parts arranged as shown, will secure the results described herein.

I claim:

1. In a machine of the character set forth, the combination of a feed block, a shaft, a member connected with said shaft and movable thereby toward and from said feed block, a rock shaft having a pair of arms, a connection between one of the arms of said rock shaft and the feed block, and a link connecting the movable member with the other arm of said rock shaft, the parts being arranged so that said link is in a substantially vertical position when said movable member is at or near one end of its stroke.

2. In a machine of the character set forth, the combination of a shaft, a feed device, and connections between said shaft and said device, said connections comprising` a member connected to the shaft to be reciprocated thereby, a bell crank lever having one arm extending substantially parallel with the direction of movement of said member and having its other arm extending at substantially right angles to the other arm, a link connecting the other arm to said member, and a link connecting the latter arm to the feed device.

3. In a machine of the character set forth, the combination of an anvil block, a shaft, a feed block, and connections between said shaft and said feed block, said connections comprising a member connected with the shaft and reciprocable toward and from the anvil block, a rock shaft having thereon a pair of arms arranged at substantially right angles to each other, one of said arms being substantially parallel with the direction of movement of said member, a link connected with the latter arm and with the movable member and arranged to be in a position at substantially right angles to the direct-ion of movement of said member when said member` is in its most remote position from the anvil block, and aI connection between the other arm of said lever and the feed block.

4. In a machine of the character set forth, the combination of an anvil block, a feed block on one side of said anvil block, a shaft on the other side of said anvil block, a member connected with said shaft and reciprocable thereby in a horizontal direction toward and from the anvil block, a rock shaft having' a pair of arms connected thereto and extending at substantially right angles therefrom, one of said arms projecting rearwardly from said shaft and being substantially parallel with the direction of movement of said member and the other arm extending in a vertical direction from said shaft, a link connecting the former arm to the movable member and arranged to be brought to a vertical position at a material period of time before the member is at its most remote position from the anvil block, and a connection between the other arm and the feed block.

5. In a machine of the character set forth, the combination of an anvil block, a feed block on one side of said anvil block, a crank shaft on the other side of said anvil block, a member connected with said crank-shaft and reciprocable in a horizontal direction toward and from the anvil block, a rock shaft having a pair of arms connected thereto and extending at substantially right angles therefrom, one of said arms projecting rearwardly from said shaft and being substantially parallel with the direction of movement of said member and the other arm extending in a vertical direction from said shaft, a link connecting the former arm to the movable member and arranged to be brought to a vertical position at a material period of time before the crank shaft passes the center remote from said anvil block, and a vertically adjustable connection between the vertical arm. and the feed block.

6. In a machine of the character set forth, the combination of a feeding device, a shaft, a member connected with said shaft and movable thereby in a generally horizontal direction toward and from the feeding device, a rock shaft having a pair of arms, a connection between one of the arms of said rock shaft and the feeding device, a link connecting the movable member with the other arm of said shaft, the parts being arranged so that said link is in a substantially vertical position when the movable member is at or near one end of its stroke, cutters operated by the movement of said shaft, and connections whereby said cutters are operated to sever the wire after the link has reached a substantially vertical position.

7. In a machine of the character set forth, the combination of a feeding device, a shaft,

a member connected with said shaft and movable thereby in va horizontal direction toward and from said feeding device, a rock shaft having a pair of arms, a connection between one of the arms of said rock shaft and the feeding device, a -link connecting the movable member with the other larm of said rock shaft, the vparts being arranged so that the link is in a substantially vertical position when said lmovable member is at or -near one end of its stroke, a cutting device, and connections whereby saidl cutting device will be operated by the movable member -to sever the wire after the said link has reached a substantially vertical position. Y

8. In a machine of the character set'forth, the combination of a feed block, a main shaft, an operating member movable by the rotation of said main shaft toward and from the feed block, a vmember connected to said operating member and reciprocable thereby, a yrock shaft having a pair of arms, a connection between one of said arms and the feed block, and a link connecting the second member with the other arm of said rock shaft, the parts being varranged so that the link is substantially at right angles to the throw of the operating member when the latter is at or 'nearone end of its stroke.

In testimony whereof, I hereunto aiilX my signature in the presence of two witnesses.

JOHN FRANCIS.

Vitnesses J. B. HULL, A. J. SPRINGBORN.

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