US445097A - Joseph w - Google Patents

Description

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J. W. THOMPSON. WIRE NAIL MACHINE.

No. 445,097. Patented Jan. 20,1891.

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J. W. THOMPSON. WIRE NAIL MACHINE.

No. 445,097. Patented Jan. 20,1891.

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WIRE NAIL MACHINE. No. 445,097. Patented Jan. 20, 1.891.A

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UNrTnn STATES PATENT Orricn JOSEPH XV. THOMPSON, OF SALEM, OHIO, ASSIGNOR OF ONE-HALF TO THE BUOKEYE ENGINE COMPANY, OF SAME PLACE.

WIRE-NAIL MACHINE.4

SPECIFICATION forming part of Letters Patent No. 445,09*?, dated January 20, 1891.

Application filed September 6, 1890. Serial No. 364,136. (No model.)

To all whom t may concern.-

Be it known that l, JosE-PH W. THOMPSON, of Salem, in the county of Columbiana and State of Ohio, have invented certain new and useful Improvements in Wire-NailMachines, of which improvements the following is a specification.

My present invention relates to and is an improvement upon certain features of wirenail machines of the type of that for which Letters Patent of the United States No. 308,000 were granted and issued unto myself andthe Buckeye Engine Company,as assignee of half the right, under date of February l0, i889.

The objects of my invention are as follows: first, to more perfectly adapt the machine to smooth and quiet operation at high speed by the provision of improved means for effecting the preliminary closure of the grippingdies with sufficient force to hold the wire against the backward movement of the feedcarriage, and to properly center the wire to be acted on by the cutting-knives, the seeondary grip, by which the wire is held with the requisite force during the heading operation, being subsequently effected by pressure derived from the heading-crank5 second, to attain greater convenience and facility in the adjustment of the cutters both toward and from the gripping-dies for thepurposc of varying as required the amount of stock allowed to project from the dies to form the head, and also in the vertical adjustment of the cutters in order that they may meet each other andthe wire fairly and centrally; third, to insure positive release of the wire by the feeding mechanism during the backward movement of the feed-carriage, and thereby to avoid the objections resultant upon the backward dragging of the feed-chisel along the wire-that is to say, the scraping` and marring of the body of the nail, the accumnlation of cuttings due to such scraping, and the rapid dulling of the feed-chisel; fourth, to attain greater facility and convenience in the manipulation and adjustment of the straightening-rollers.

To these ends my improvements consist in certain novel devices and combinations of 5o mechanism hereinafter fully set forth.

In the accompanying drawings, Figure l is a vertical longitudinal central section through a wire-nail machine embodying my invention; Fig. 2, a plan or top view of the same; Fig. 3, an end view in elevation, as seen from the right; Fig. 4, a horizontal section at the line :r of Fig. l; Fig. 5, a similar section at the line y y of Fig. l, through the portion of the frame to which the pivots of the cutting-le- 6o vers are secured; Fig. G, a view in elevation of one of the pins to which the cutting-levers are pivoted, and of the section of the divided eccentric block in which said pin is fitted; Fig. 7, a view in perspective of one of the divided eccentric blocks; Fig. 8, a vertical longitudinal central section through the lower portion of the machine, illustrating a modification of the gripping mechanism; Fig. 0, a vertical longitudinal section through the grip- 7o ping mechanism of Fig. l, showing the parts in the positions occupied during the secondary grip of the wire for the heading operation, they being shown in Fig. l at the commencement of the gripping movement; Fig. l0, a similar section illustrating another modification of detail of the gripping mechanism; Figs. 1l and l2, vertical sections through the straightening mechanism showing the rollers as released from and pressed against the wire, 8o respectively; Fig. 13, a partial plan view of the same; and Fig. le, detail views of the device for effecting positive release of the grip of the feeding mechanism.

The machine herein illustrated accords in its general and essential features of operation with that set forth in Letters Patent No. 398,009 aforesaid-that is to say, in the consecutive and continuous performance of the straightening and the feeding of a length of 9o wire between gripping-dies for a distance suficient to form a nail, the gripping of the Wire by said dies, the cutting off and pointing of the nail, the heading of the projecting portion of wire for the nail, and the release and delivery of the finished nail. The structural elements of the machine by which these operations are effected and their co-operative cutting and pointing and heading mechanislns and effecting the secondary grip or closure of the gripping-dies through connections hereinafter described, and the shaft 3 carries upon one of its ends a crank disk or arm 3*I for operating the mechanism by which the wire is progressively fed or advanced to be formed by cutting and heading into a series of nails. A cam- 3e is also fixed upon the shaft 3 adjacent to the crank 3, said cam serving to effect through interposed connections he preliminary closure of the grippingdies upon the wire, by which the latter is held while being cut off and during the retraction of the feed-carriage.

The straightening mechanism, by which the length of wire is properly aligned preparatory to being subjected to the remaining operations involved in its conversion into finished nails, is shown fully in Figs. 2, 11,12, and 13, and consists of a series of peripherlly-grooved rollers 34, journaled in line on spindles 35, fixed to the table of the machine adjacent to its left-hand or receiving end ata proper height to receive the wire 28 to be operated on in their peripheral grooves as the wire passes to the feeding mechanism, and two ormorerollers 36,Which arejournaled in the same horizontal plane as the rollers 34 upon the laterally-expanded head of a tubular carrier 37, which is fitted to slide longitudinally upon a stem 38 toward and from the relatively fixed rollers 34. The end of the stem 38 Vadjacent to the rollers 34 is provided With a T-shaped head 40, and is pivoted to the table by a bolt 39, about the axis of which the stem 38 and carrier 37 have a limited range of traverse in a horizontal plane,being adjusted and held in the desired angular relation to the axial line of the wire by set-screws 4l, engaging threaded lugs i2 on the table and abutting against the arms of the T-head 40 of the stem 38. A tubular nut 43, through which the stem 38 passes freely, is 'screwed'into the o uter or free end of the carrier 37, and a helical spring 44e is interposed between the inner face of the nut 43 and a shoulder on the stem 38, the tension of said spring acting to force the carrier 37 and rollers 3U away from the relatively xed rollers 34. A/lever-handle 4:5 is pivoted to the outer end of the stem 38 with the capacity of being swung into either a vertical or a horizontal position, as shown in Figs. ll

and l2, respectively. rlhe relative distances .of the side and end of the shorter arm of the lever-handle 45 from the pivot thereof are such that when in vertical position the latter permits the spring 44 to force the carrier 37 and rollers 36 sufficiently far from the rollers 3l to permit the wire to pass freely and without Contact between the rollers 34c and 36 but when turned into horizontal position it compresses the spring ett and forces the carrier 37 and rollers 3b' toward the rollers 34, thereby bringing said 'rollers into sufficient proximity to cause the Wire to be bent to a more or less sinuous course as it passes between the rollers, such bending being greater or less in degree accordingly as the nut 43 is screwed a less or greater distance into the carrier 37. \Vhen it is desired that the rollers 3G shall bear with equal force upon the wire, the set-screws 4l are adjusted so as to place the-stem 38 and carrier 37 at 'right angles to the line of traverse of the Wire, as shown in Fig. 2, and when it is desired that the several rollers 3G shall bear unequally upon the wire one of the set-screws 4l is slackened and the other tightened, so as to bring the stem and carrier to the inclination proper to effect the unequal bearing desired, asv shown in Fig. 13.

The method of straightening wire by alternately bending it in opposite directions from its line of traverse is familiar to those skilled in thezart, and is conveniently carried ont by the construction above described.

The feeding mechanism is of the following construction: The feed-carriage 20 is fitted to be reciprocated between dovetailed guides 2l, formed integral with the table l on one side and. gib-plates 2l on the other, said plates being bolted in position and adjusted and held by set-screws2l". Longitudinal reciprocuation on the table is imparted to the car riage 2O by a connecting-rod 22, which is coupled at one end to a crank-pin 23 on the crank or disk 3d, and is secured at the other to a shaft 24, journaled in a transverse bearing on the feed-carriage 20. The crank-pin 23 is secured adj ustablyin aradial groove or slot in the disk 3, so that the traverse of the feedcarriage may be increased or diminished as required, for different lengths of nails, and as the driving-shaft 3 rotates in the direction of the arrow the connecting-rod 22 will be raised above its mean position while the feedcarriage is moving backward, and Will be depressed below its meanV position as the carriage moves forward in feeding the wire. By the term forward, as applied herein to the movements both of the feed-carriage and of the heading-ram, is meant the direction of traverse in which the work of the respect-ive members is performed, which directions are relatively opposite one to t-he other. A collar 24 is secured upon the end of the shaft 24 which is farthest from the connecting-rod 22, said collar being provided IOO IIO

-4`with a projecting arm or lug 211.

A doublearmed feed-dog 25, carrying on its inner and shorter arm a rod 27, having a chiselfaced end which bites into and draws the wire 28 along when the carriage is moved forward, is pivoted on a stem 26, located on the feedcarriage in such position thatl its longer arm may be pressed against by a spring 29 with sufficient force to insure a proper bite of the feed-chisel 27 on the opposite arm of the dog, upon the wire which passes between the feeding end of said chisel and a bearing 30, se cured adj ustably upon the carriage opposite thereto. It will be seen that oscillatory movement will be imparted to the shaft 24 and collar 24, by rea-son of the vertical movement of the connecting-rod 22, as actuated by a crankpin moving in a circular path, and in the oscillation of the'shaft 2t during the backward traverse of thel carriage the lug 24B will bear against the adjacent arm of the dog 25, and, overcoming the tension of the spring 29, will withdraw the end of the feed-chisel 27 from the wire. Vhen the adjustments are properly made, the contact of the lug 24:b with the dog 25 will take place when the crank-pin 23 is on its outer dead-center-that is to say, when the feed-carriage has just completed its forward movement-and the lug will hold the feed-chisel clear of the wire during the entire backward movement of the feed-carriage, allowing it to be again brought into contact with the wire by the spring 29 at the opposite dead-center and during the succeeding forward moveln ent of the feed-carriage. To provide for effecting the adjustments requisite to accomplish the above result, the end of the shaft 24, on which the connecting-rod 22 is fitted, is made of somewhat greater diameter than the remainder of the shaft, and is recessed to afford bearings on opposite sides of its center for two set-screws 24C 24d, each of which will when tightened tend to rotate the shaft 24 in one direction with relation to the connecting-rod, the rotating action of the two set-screws being relatively opposite. When both set-screws are tightened, or either alone, the connecting-rod is irmly locked to the shaft, and when'one set-screw is slackened and the other tightened the shaft will be correspondingly rotated. Then it is found that the feed-chisel fails tocome in contact with the wire so'on enough and moves out of contact with the wire too soon, the adjustment requisite to correct such imperfect action may be made by slackening the lower set-screw 24d and tightening the upper one 2&0.

The wire 28is preliininarily gripped or held stationary during the cutting and pointing operation, and secondarily gripped with greater force during the heading operation by mechanism which will now be described. The gripping-dies 18 18, between which the wire is held, are, as in Patent No. 298,009, respectively, iixed and movable in a vertical die-block 16, secured to the table 1, the lower movable die 18a being, in my present invention,'preliminarilymoved toward the upper 'fixed die 18 by means of the cam 3e, and being secondarily movedvmore closely toward the fixed die by aright-angled lever-connecting block 5, coupled to thepin or the crank 3, saidblocklso `fa2r1according with that of Patent 398,009 that my present invention may be clearly yunderstood by a description of the intermediate mechanism, through which it actuates the movable die without herein lsetting forth in detail its specific construction and operative principle. A transverse rock-shaft 13 is j ournaled in bearings on the frame of the machine below the driving-shaft 3, the shaft 13 having an upwardly-projecting arm'13,se cured upon one of its ends, upon which arm is journaled a roller 13, the periphery of which abuts against the face of the cani 3C of the drivin g-shaft. A downwardly-projecting arm 13b is secured upon the rock-shaft'l in or near the vertical central plane of the machine, said arm having a horizontal spreaderbar 15d coupled to its lower end. The opposite or forward end of the spreader-bar is proviued with an enlarged head 13e, the outer iaces of which are curved or inclined above and below its center, so as to be capable of exerting a wedging action, and the head has substantially parallel upper and lower faces forv the remainder of its length. The wedging-faces of the head 13 are adapted to pass between and bear on the peripheries of two rollers 15b and 14, one of which 15b is journaled in the free end of al gripping-lever 15, which is pivoted by a pin 15 to a bracket bolted to the frame below the die-block 16, and the other 14" is similarly mounted on an intermediate lever 14, journaled on the frame below and nearthe'outer end of the grippinglever 15.l A vertical bolt 15c engages a thread in the gripping-lever near its pivot, the upper rounded end of which bolt entersasocket in the lower end of a push-bar 15d, having a rounded upper end, which enters a corresponding socket in the lower end of the movable gripping-die 18. A pull-rod 19 is hooked at its upper end into the die 18 andlis connected at its lower end to the gripping-lever 15, the pull-rod acting to depress the movable die 18 to release the wire upon the downward IOO IIO

movement of the gripping-lever, as in Patent j The free end of the intermediate lever 14 is coupled by a link or links 14C (the connecting-pins of which may be ittcd in either of a series of holes in the lever 14 to enable Yits traverse to be varied) to an arm 6b, fixed upon a shaft C, which is journaled in the frame above the spreader-bar and has secured upon it one or more radius-bars or links 6, which are coupled at their upper ends to the pin 5, which connects the heading-ram et to the right-angled lever-connecting block 5. A spring or pair of springs 13h, connected to the frame, bear against a pin on the spreaderbar 13d, tending to force the same away from the rollers 151 and it".

The operation of the gripping mechanism will be readily understood by reference to Figs. 1 and 9, the former showing the position of the parts at the beginning of the preliminary grip or closure of the gripping-dies while the nail is being cut off, and the latter in the secondary and more forcible grip which the dies exert upon the wire during theheading operation. The configuration of the cam 3? is such that at the proper period in the rotation of the drivin g-shaft (being shortly after the commencement of the forward movement of the heading-ram) the cam 3e forces the upperarm 13 of the rock-shaft 13 to theright, coincidently moving the lower arm 13b and the spreader-bar 13 in the opposite direction and forcing the wedging-faces of the head I3c of the spreader-bar between the rollers 141 and 151. The intermediate lever 14 and roller 14b being at this period held unyieldingly by the connection of the lever 14 with the connecting-block 5, the roller 15b and gripping-lever 15 are lifted, and the grippinglever, acting on the movable die 18, through the bolt 15c and push-bar 15d, closes the dies on the Wire 28, effecting their preliminary grip, the force of whichI is sufficient to center and hold the Wire while being cut off by the cutting-knives and while the backward traverse of the feed-carriage is being effected. As the heading-ram 4 moves forward toward the stub of wire projecting fromv the dies to form the head of the next nail, the block 5, through the links 6,' arm 6b, and links 14, lifts the intermediate lever 14, which in turn lifts the spreader-bar 13, raising the roller 15b and gripping-lever 15 a'suflicient distance to effect the secondary and more forcible grip of the dies upon the wire, by which the wire is securely held against being driven backward by the pressure of the ram in forming the head. Upon the relief of the pressure of the cam 3 on the roller 13at the termination of the heading operation, the spring 13h forces the spreader-bar away from. the rollers 14b and 15" and the gripping-lever 15 falls by gravity, opening the dies and admitting of the requisite forward feed of the wire for the next operation. A spring exerting downward tension upon the gripping-lever15 may,if desired, be applied to insure its proper downward movement.

It will be seen that as the parallel sides of I the head of the spreader-bar are in contact with the rollers 14 and 15b during the secondary grip of the dies the additional gripping-pressure does not impose any additional stress upon the cam 3, and as the dies need be, and in practice are, closed with only moderate force in the preliminary grip, the pressure on the cam is at no time undue or severe.

Y pressure of the roller on the cam is at all times proportionate to the grippingforce, and

cams so operating therefore require to be made of the hardest material available, notwithstanding the use of which they are found to rapidly wear out.

The duty imposed on the cam and roller of my improved construction is so light that the earn may be made of ordinary iron without being subject to unduly rapid wear.

Fig. 10 illustrates a modification in detail of the gripping mechanism above described, in which the traverse of the spreader-bar and the inclination of the wedging-faces of its head are in opposite direction to the same features as above described, the arm 13 and 13b being located on the opposite side of the cam Se. This arrangement may be found desirable in the respect that the stress which it imposes on the driving-shaft is in the same direction as that imposed by the heading-ram when forming the head of the nail.

The further modification of the gripping mechanism shown in Fig. 8, may be adopted in cases where thesize, proportions, and duty of the machine render it advisable. In this instance the intermediate lever 14 and its connections 14:L are dispensed with, and the roller 14b is mounted directly on the arm 6b, or between two of said arms, theA shaft 6n of said arm, which in this case performs the function of and acts as the equivalent of the intermediate lever 14, being journaled below the gripping-lever instead of above it, as in the former instances. In all other structural and operative particulars the construction accords with that of Figs. 1 and 9. Such modification embodies the advantages of simplicity and cheapness, but does not provide for the convenient variation of the secondary grip movement that may be required to adapt the machine for operation on wire of different diameters, as the smaller the wire operatedon the less is the secondary grip f movement required.

The cutting and pointing mechanism is, in its general features, similar to that of Patent No. 398,000-that is to say, the cutting and pointing is effected by a pair of' cutters 12", connected to the free ends of a pair of cutting-levers 12, which are pivoted vertically to the table and are coupled by links 11 to the upper arms 10 of a pair of vertical rockshafts 10, the lower arms 9 of whichA are coupled bya pair of connecting-rods 8 to a pin 5b on the lower or vertical arm'of the conmeeting-block 5. The improved adjustment of the cutting-knives to which this branch of my present invention relates -is attained by the following means:

Each of the cutting-levers 12 is journaled on a stud or pin 12, secured upon a divided eccentric block 12, which is fitted, with the capacity of rotation, in a circular orifice in the table l of the machine, and is provided with an upper flange 12d, which rests upon the top of the table and retains the eccentric in proper position vertically. The studs l2a are threaded on their lower ends and engage IOO IIO

corresponding female threads in the eccentric blocks 12, one-h alf of the receivin g-threads being cut in each section of the eccentric blocks, and the two sections being cut away slightly on the surfaces adjoining the receivingthread, so as to close tightly on the threaded end of the stud without coming in contact one with the other. A recess l2e is formed in each section of the eccentric blocks, said recesses serving for the reception of set-screws l2f 12g, (one for each section,) which set-screws engage female threads in the table and bear against the substantially radial faces of the recesses 12e. The eccentric blocks may be turned in either direction, as desired, in the openings of the frame in which they are titted, and fixed in adjusted position therein by slackening one set-screw and tightening the other, the pressure of the respective setscrews of each pair, when one is unopposed by the other, acting to turn the eccentric block in one or the other direction, respectively, and the coincident pressure of both set-screws acting to clamp the eccentric block firmly upon the stud and hold the block in any position to which it may be brought.

The bearing-studs l2 of the cutting-levers l2 being connected 'eccentrically to the eccentric blocks l2, rotation of the blocks will increase or diminish t-he distance of the studs from the gripping-dies, and thereby cause the wire to be cut off at a greater or less distance from the dies, leaving a correspondin gly greater or less length of stock for the formation of the head of the nail. The slackening of the screws 12f and tightening of the screws 12g will increase the length of stool-r, and vice versa. The vertical adjust mentof either of the cutting-levers is effected by slackening one of the set-screws of the eccentric bloclr suiiicient-ly to permit the stud to be turned in its threaded bearing in the block, so as to raise er lower it, and with it the cutting-lever which it carries, as far as desired. Then brought to proper position, the set-screw is again tightened and the stud firmly held in place. Squared or hexagonal heads may be formed upon the studs to admit of the application of a wrench in making the above adjustments.

Instead of being entirely divided, as above described and shown, the eccentric blocks may be cut only partially across, so as to be sprung upon the studs 12"', or an undivided eccentric may, if preferred, be employed, the stud being in such case either connect-ed permanently thereto and the vertical adjustment being effected by the coincident elevation or depression of the block and stud, or being connected frictionally to the block and independently vertically adjusted.

The heading of the nail is effected by a heading-punch 4f, secured in a heading-ram et, which is coupled by a pin 5C to the outer end of the upper end of the outer or horizontal arm of the connecting-block 5. The heading mechanism is substantially similar in construction and operation to that of Patent No. 398,009, and as it does not in and of itself embody features of my present inven- 7o tion it need not be herein at length described` I have herein exemplified that portion ot my present invention which relates particularly to the grippingmechanism as embodied and applied in a machine in which a single crank-pin upon the driving-shaft actuates, through the intermediation of a connectingblock of the special construction set forth in Patent No. 398,000 aforesaid, and not herein claimed, both the heading-ram and the cut- 8o ting mechanism,the features of improvement in the gripping mechanism claimed as of my present invention being desirably adaptable to and capable of full and clear illustration in a machine of such construction. lt will, however, be obvious that the employment of the specific form of connecting-block herein shown-z'. e., a right-angled lever connectingblock having an arm additional and supplemental to that which actuates the headingram and provided for effecting a separate functionwhile proper in is not essential to the practice of my present invention, and that so farastheimprovementin the grippingmechanism thereof is concerned the same would be applicable without substantial variation either of structure or operation in a machine in which the heading-ram and the cutting mechanism were operated through separate and independent connections from the drivingshaft,or in which a separate connection having a movement substantially coincident with that of the forward movement of the heading-ram is employed to transmit pressure for efecting the secondary grip to the movable die. I do not, therefore, limit my present invention to a construction which embodies the specific connecting-block herein shown, and by the term connecting-block as used in the claims l include as a mechanical equivalent a rod or bar of the form known in the art by which a heading-ramis coupled to and its reciprocation effected by a c ank-pin on the driving-shaft.

I claim as my invention and desire to secure by Letters Patentl. In a wire-nail machine, the combination of a driving-shaft, acam fixed therein, aheading-ram actuated by the driving-shaft, and a gripping-dic actuated by suit-able known mechanical connections, to which movement is imparted, preliminarily from the cani and secondarily from the driving-shaft, in substantial coincidence with the movement of the heading-ram, substantially as set forth.

2. In a wire-nail machine, the combination of a drivin g-shaft, a cam fixed thereon, aheading-ram actuated by the driving-shaft, a fixed gripping-die, a movable gripping-die, a gripping-lever coupled to the movable die, an in- 13o termediate lever coupled to and vibrated by the driving-shaft in substantial coincidence with the movement of the heading-ram", and a spreader-bar actuated by the cam and IOO adapted to preliminarily transmit pressure from the cam to the gripping-lever and secondarily transmit increased pressure from the driving-shaft to said lever through connections independent of the cam, substantially as set forth.

3. 'In a Wire-nail machine, the combination of a driving-shaft, a cam fixed thereon, a heading-ram actuated by the driving-shaft, a fixed gripping-die, a movable gripping-die, a gripping-lever coupled t0 the movable die, an intermediate lever coupled to and vibrated by the driving-shaft in substantial coincidence with the movement of the heading-ram, a spreader-bar actuated by the cam and adapted to preliminarily transmit pressure from the cam to the gripping-lever and secondarily transmit increased pressure from the drivingshaft to said lever through connections independent of the cam, and a spring acting upon the spreader-bar in opposite direction to the pressure imparted thereto by the cam, substantially as set forth.

4. In awire-nail machine, the combination of a driving-shaft@ cam fixed thereon, a heading-.ram actuated by the driving-shaft, a fixed gripping-diga movable gripping-die, a gripping-,lever coupled to the movable die, an intermediate lever coupled to and vibrated by the driving-sl1aft in substantial coincidence with the movement of the heading-ram, a spreader-bar actuated by the cam and provided with an enlarged and Wedge-.faced head adapted to be forced between bearings on the gripping-lever and the intermediate lever by pressure from the cam, and a spring acting upon the spreader-bar in opposite direction to the pressure imparted thereto by the cam, substantially as set forth.

5. In a Wire-nail machine, the combination of a driving-shaft, a cam fixed thereon, a heading-ram, a connecting-block coupled to a crank-pin on the driving-.shaft and to the heading-ram, a fixed gripping-die, a n'iovable gripping-die, a gri pping-lever coupled to the movable die, a roller journaled on said gripping-lever, an intermediate lever coupled to and vibrated by the connecting-block, a roller j ournaled on said intermediate lever, a doublearnied rock-shaft having a roller on its upper arm bearing on the periphery of the cam, a spreader-bar connected to the lower arm of the rock-shaft and provided with an enlarged and Wedge-.faced head adapted to be forced between the rollersof the grippingand intermediate levers by the pressure of the cam on the roller ofthe rock-shaft arm, and a spring acting upon the spreader-.bar in opposite direction to the pressure imparted thereto by: the Cam, Substantially as set forth- 6. In awire-.nail machine, the combination of a bearing-,block fitted with the capacity of axial adjustment in the frame of the machine, and a cutting-lever journaled eccentrically on said bearing-block, substantially as' set forth. Y

Y 7. In a wire-nail machine, the combination of a bearing-block fitted with thc capacity of axial adjustment in the frame of the machine and provided with opposite lateral recesses, adjusting-screws, each bearing against the frame and against the face of one of said recesses, and a cutting-lever journaled eccentrically on the bearing-block, substantially as set forth.

8. In a Wire-nail machine, the combination of a bearing-block litted with the capacity-of axial adjustment in the frame of the machine, said blocl; being` provided with a threaded opening eccentric to its axis and being split or divided radially on opposite sides of said opening, adjusting-screws bearing against the frame and against opposite lateral faces on the bearing-block, a cuttinglevcr pivot having a thread engaging that of the opening of the block, and a cutting-lever journaled on said pivot, substantially as set forth.

9. In a wire-nail machine, the combination of a driving-shaft, a fixed gripping-die, a movable gripping-die actuated through intermediate connections from the drivingshaft, a bearing-block fitted with the Capacity of axial adjustment in the frame of the machine, and a cutting-lever journaled eccentrically on said bearing-block, so as to be brought nearer 't0-G1' farther from .the gripping-dies by axial adjustments of the bearing-block, substantially as set forth.

l0. In .a Wire-nail machine, the combination of a driving-shaft, a feed-carriage fitted to reciprocate on the frame of the machine,

Connecting-rod coupled t0 a crank-pin rotated Vby the driving-shaft and to the feedcarriage, a double-armed feed-dog pivoted on the feed-carriage and having an arm which is moved in opposite directions by the vertical vibration 0f the connecting-.rod and by a spring, respectively, and a feed-chisel xecl to the opposite arm of the feed-dog, substantially as set forth.

ll. In a Wire-nail machine, the combination of a driving-Shaft, 2L feed-carriage fitted to reciprocate on the frame of the machine, a shaft journaleditransversely'on the carriage, a connecting-rod secured to said shaft and coupled at its opposite end to a crankpin rotated by the driving-Shaft, a doublearmed feed-.dog pivoted on the feed-carriage, a lug fixed to the transverse shaft of the carriage and bearing against one of the arms of Vthe feed-dog, a spring exerting tension upon the feed-dog indirection opposite t0 that of the pressure of the lug, and a feed-.chisel fixed to the opposite arm of the feed-dog, substantially as set forth. Y Y

l2. In a wire-nail machine, the combination of a series of straightelling-rollers journaled upon pivots fixed to the frame of the machine, a stem pivoted to the frame adjacent to said rollers, a carrier fitted to move longitudinally upon said stem, and straightching-rollers journalcd upon pivots fixed to Y said carrier, substantially as set forth.

IIO

13. In a wire-nail machine, the eombnal adapted to bear against he carrier in direction of a series of straightening-rollers jourl tion opposite to that of the tension of the naled upon pivots fixed to the frame of the E spring, and adjusting-se1e\vs bearing against machine, a stein having a laterally-enlarged i the frame and against the lateral enlarge- 5 head and pvoted to Ihe frame adjacent to ments of the head on the stem, substantially I5 said rollers, a Carrier fitted to move longias set forth. tndinally upon the stem, straightening-rollers journaled on pivots xed to the carrier, a Witnesses: spring bearing' against the stein and against i T. SNOWDEN BELL, lo the carrier, a level` pivoted to the stem and l T. J. HOGAN.

JOSEPH THOMPSON.

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