US1113364A - Scarfing-machine. - Google Patents

Description

H. LYON.

SCARFING MACHINE APPLICATION FILED MAY 27.1914.

1,1 1 3,364. Patented Oct. 13, 1914.

5 SHEETS SHEET 1.

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H. LYON.

SCARFING MACHINE.

APPLICATION FILED MAY 27,1914.

1,1 1 3,364. Patented 060.13, 1914.

5 SHEETS- SHEET 2.

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H. LYON.

SCARFING MAUI-IINE.

APPLICATION PILBI) MAY 27,1914.

1, 1 1 3,364. Patented 001.13, 1914.

5 SHEETS *SHEET 3.

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A 4A Magi/@41 4 g H. LYON.

SCARFING MACHINE.

APPLICATION FILED MAY 27.1914.

Patented Oct. 13, 1914.

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UNITED STATES IiTENT OFFICE.

HLB BY LYON, OF BROCKTON, MASSACHUSETTS, ASSIGNOR TO JOHN A. BABBOUB AND PEBLEY E. HARBOUR, DOING BUSINESS AS COPARTNEBS UNDER THE NAME AND STYLE-OF THE BBOCKTON BAND COMPANY, OF BROCKTON, MASSACHUSETTS.

SCARFING-MACHINE.

Specification of Letters Patent.

Patented Oct. 13, 1.914.

Application flied May 27, 1814. Serial No. 841,268.

To all whom it may com-6m Be it known that I, HARRY LYON, a'cltizen of the United States, and resident of Brockton. in the county of Plymouth and State of Massachusetts, have invented certain new and useful Improvements in Scarfing-Machines, of which the following is a specification.

This invention relates to a machine for forming scarfed ends on strips of leather or like material, and particularly for leather used for welts of boots and shoes.

The invention has for its object to provide a machine adapted to form scarfed surfaces on leather or other stock, without adjustment to compensate for the thickness and width of the stock, and to form accurate scarfed faces adapted to meet and form a smooth and even joint.

The invention consists in the improvements which I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specificatxom-Figure 1 represents an end view of a machine embodying my invention. Fig. 2 represents a top plan view of the same. Fig. 3 represents a view of the end opposite that shown by Fig. 1. Figs. 4, 4, and 4", represent sectional views on line 4-4 of Fig. 2, showing different stages of the operation. Figs. 4 and 4 represent fragmentary sectional views, showing parts represented by Fig. 4. Fig. 5 represents a fragmentary perspective view, showing a part of the table hereinafter referred to. Fig. 6 represents a section on line 6-6 of Fig. 5. Fig. 7 represents a section on line 77 of Fig. 6. Fig. 8 represents an edge view of a piece of stock transversely scored. Fig. 9 represents an edge view, showing the stock after it has been severed. Fi 10 represents a section on line 10-10 of 1 lg. 2. Fig. 11 represents a section on line 11-11 Fig. 12 represents a section on line 12*12 of Fig. Fig. 13 represents a perspective view of the waste piece removed by the machine. Fig. 14 represents a perspective view of the leading end of apiece of stock scarfed by the machine. Fig. 15 represents an edge view. showing two scarfed pieces cemented together.

The same reference characters indicate the same parts in all of the fi ures.

12'represents a scarfing-kmfe attached by screws 18 to a slide 14 movable in fixed ways 15 on the machine frame. The knife 12 is supported by vertical longitudinal ears or webs 14: formed on theslide (only one of which is shown), said webs being connected by a transverse web 14 extending cross wise of the machine. The attaching screws 13 engage the webs 14 which constitute seats for the scarfing-knife and are utilized to su port the hereinafter-described rock-shaft 6, journaled in hearings in said webs. The slide 14 and the scarfing-knife are reciprocated by mechanism, of which the rock-shaft 16 forms a part, in a rectilinear path which is in the same plane with the outer side 12 of the knife, and with the cutting-edge formed by the intersection of the beveled edge face 12 with the upper side of the knife. The path of the cutting edge is inclined relatively to the stock-supporting face of a rocking table 18 which extends crosswise of the path of the knife edge.

The table 18, which is shown in detail by Figs. 5, 6, and 7, has two faces 18 and 18" which converge to form an acute angled edge 18. attached cylindrical trunnions 19 which are 'ournaled to rock or oscillate in fixed bearings 20 on the frame of the machine, said bearings being provided with ears 21 (Fig. 3) attached by screws 22 to the parts of the frame which form the ways 15. The edge 1S is exactly in the axial line of the trunnions 19, so that the rocking movements of the table 18 do not affect the position of said ed e, which as above stated, is in the ath of the cutting edge of the knife he lower table face 18, is a stock-support in face WllH'l] coi'ipcrates with a pressure ml 23 m llOlillliji a strip 8 of welt leather (hereinafter called the stock). in such relation to the knife 1). that said knife in advancing from the position shown by Fig. 4 to that shown by Fig. 4, sever-s the stock by an inclined out, which removes the waste- ]eading end 8, (Figs. 9 and 13), and forms a beveled face .9 (Fig. '14) on the under side of the stock. The upper table face 18,

is a knife-guiding face, w iich supports and guides a scoring-knife 24. Said knife is reciprocated in a path determined by the inclination of the face 18", and in advancing, moves from the position shown by Fig. 4, to that shown by Fig. 4 and forms a mi- To the ends of the table 18 are at the end of its forward movement.

roll 23 moving forward with the scarfingnute scoring or pointing cut 8 (Fig. 8), in the upper side of the stock 8. This out, which is made just before the scarfing-knife 12 reaches the end of its forward movement, is in the path of the edge of the scarfingknife and defines or forms the thin edge a (Fig. 14) of the sear-fed portion of the stock so that said edge is straight and free from raggcdncss.

The rocking table 18 is connected with its trunnions 19 by necks 25, which are preferably formed as shown by Figs. 5, 6, and

7, to constitute shields or covers for the gearing hereinafter described. Said table, necks, and trunnions are preferably formed as a one piece malleable iron casting. The pressure roll 23 is journaled in bearings 26 formed in arms 26 on the rock-shaft 16. Saidrock-shaft is provided with a central arm 27 which is pivoted by a pin 28 to a connecting-rod 29, which imparts an up and down sidewise motion to the roll 23 from anoperating-shaft 30. through an eccentric 31, secured to said shaft, a strap 82 on the eccentric, the connecting-rod 29, the arm 27, the rock-shaft 16, and the arms 26. The arms 26 and 27 form in effect a bell-crank lever pivoted to the connecting-rod and adapted to force the pressure roll upwardly when the connecting-rod is moved in the direction of the arrow, (Fig. 4.) The upward movement thus imparted to the roll 23 causes it to press the stock a upwardly against the table face 18, when the knives and table are in the positions shown by Fig. 4. so that the stock is clamped between the roll and the table. The upward movement of the roll 23 is limited by the thickness of the stock, and since the center of its up and down movement is the rockshaft 16, which is movable with the slide 14. and with the scarfing-knife 12, the continued movement of the connecting-rod in the direction of the arrow from the position shown by Fig; 4, causes the rock-shaft, slide and scarfing-knife to move forward when the roll 23 comes to a bearing on the stock. In other words, the connecting-rod first acts to raise the pressure roll to a bearing on the stock backed by the table. and then. the upward motion of the roll being arrested by the stock, acts through the arm 27 and the rock-shaft to pull the slide, scarfing-knife and pressure roll forward with it (the connecting-rod). The scarfing knife is thus caused to advance and scarf the stock. as indicated by Figs. 4, and 9.

Fig. 4". showing the position of the knife before it reaches the end of its forward movement, while Fig. 9 shows the condition of the stock at the end of the forward movement of the scarfing-knife.

Fig. 4 shows the position of the kl i ige e l knife, is caused to rotate and bear with a non-displacing rolling pressure on the stock by means of gear segments 34 (Figs. 10 and 11) affixed to the journals 9-3 of the roll 23 (only one of said segments being shown) and racks 35 attached to vertically swinging arms 36 which are pivoted at 37 to fixed cars 38. The racks 35. while free to rise and fall with the roll :23, are restrained by the arms 86 from moving endwise. so that when the roll 23 moves forward with the scaldingknife, it is rotated bythe racks 35 and gear segments 34, so that its periphery is in rolling contact with the stock, and has no'tendency to displace or move the same forward. If the roll 23 were free to rotate idly in its bearings, its rotation might be retarded by friction, so that its periphery would have a tendency to'drag the stock forward, and thus prevent the searfing-knife from properly performing its function. This is prevented by the gear segments and racks which positively control and rotate the roll. Another object of this positive control is to cause a strip 39, of relatively soft material such as leather, engaged with a longitudinal slot in the roll 23, to coincide with the path of the edge of the scoring-knife 24, so that the latter when projected, will not come in contact with a metallic part of the roll. The mechanism is timed to bring the strip 39 into the. path of the scoring-knife just before the edge of said knife reaches the end of its forward movement. The forward movement of the pressure roll 23 carries said roll forward from under the bottom face 18* of the table 18, as shown by Fig. 4", before the completion of the scarfin; cut, so that the roll and the stock immediately above it are not held down by the table during the latter part of the scarfing cut. The roll is prevented, however, from swinging upwardly above the lower edge of the table, by the stop members 85 and S6, hereinafter described. Each arm 36 is provided with a head 41 having a flange 42 which projects under the disk on which the gear segment 34 is formed. as shown by Figs. 10 and 11, and prevents separation of the rack 35 from the gear segment.

l The scoring-knife 24 rests loosely on the table face 16", and is held in contact thereiwith by g avity. The mechanism for re- ;ciprocating the v corint knife comprises a l rock-shaft "It; (Figs. 2, 3 and 4.) journalcd in bearings 4-1 attached by screws 45 to the table. 18. Said rock-shaft has a long arm p16, having a trundle roll 47, bearing on a cam tolattached tothe shaft 30. The perimcter of said cam has an elongatei'l dwell portion concentric with the shaft, and. a recessed portion 4!) (Fig: 3). The rock-shaft has two shorter arms 50 which are connected by links 51 with cars 52 attached to the scoring-knife 24, said links being pivoted at 53 and 54, so that the knife may be lifted side-wise from the table. The trundle roll 47 is held by a spring 56 against the perimeter of the cam 48 which is formed to give the scarfing-knife quick forward and backward movements. these being followed by a relatively long'period of rest. The table 18 is oscillated and held successively in the positions shown by Figs. 4 and 4, by the means next described.

To the trunnions 19 are attached by screws 57 cap plates 58. The plate at one side of the machine is provided with an upwardly inclined arm 59 (Fig. 3) having a head 60 in which a slide (31 is movable. Said slide is pressed downwardly by a spring 62 and carries a trundle roll 63 bearing on a cam 64 attached to one end of the shaft 30. The plate 58 at the op 'iosite side of the ma chine is provided with a. downwardly inclined arm 65 (Fig. l), carrying a trundle roll ()6 which bears on a cam (37 attached to the other end of the shaft 30. The cams (ii and G7 are oppositely arranged, as may be seen by comparing Figs. l and l, their form and arrangement being such that they act alternately in oscillating the table and holding it in the positions shown by Figs. l and 4. The function of the slide (31 and the spring 62 is to enable the downward movement of the table to be arrested by the upper surface of the stock, whatever may be the thickness of the latter.

The operating-shaft 30 is impelled from a clutch-shaft 69 through gears 70 and 71, (Figs. 2 and 3), the clutch-shaft being provided with a fast friction clutch pulley 72 (Fig. 12), and a loose friction clutch driving pulley T l, on which a driving-belt 75 runs from a driving-shaft 75 (Fig. l). The loose pulley 7 is movable sidewisc into and out of engagement with the fast'pulley 72, by mechanism which includes a foot treadle 74 (Fig. 1). Said mechanism, which is not claimed herein. being organized to move the loose pulley into clutching engagement with the fast pulley when the trcadle is depressed and to :mton'mtically separate the loose pullcy from the fast pulley after a complete rotation of the shaft 10. The eccentric 3! is in the position shown by Fig. i, when said pulleys are separated and the rotation of the shaft 3) is stopped, the major axis of the ecc ntric ill being in alinement with the connectinga'od 29. so that the machine is on a dead center, when the slide H and scarfing-knife 12 me retracted. \Vhcn the connecting-rod 29 is moved from the position shownby Fig. 4". in a direction opposite that of the arrow (Fig. 1-). it first depresses the pressure roll through the bell-crank arms 26. .57 and then abuts against. an adjustable contact rod or piece 76. carried by the slide 14, and pushes the slide, scarliugknife and pressure roll backwardly. The

rod 76 is movable endwise in an orifice in a block 77 attached to the slide 14. and its adjustment determines the width of the beveled face 8 Tue rod is adjusted by turning a disk nut 7s engaged with a threaded portion of the rod. and con lined against sidewise movement by the sides of a slot 79 (Fig. 2) in the block 7?. the central portion of the nut being in said slot. The periphery of the nut T8 is provided with spaced depressions 80 adapted to engage a lockingscrow 81 engaged with an arm 8:! attached to the slide 1- The nut may therefore be locked in either of a number of positions. to hold the rod 76 in either of a corresponding number of positions. determining the starting point of the scarfing-knifc. The nut 78 may be inscribed with characters to indicate the widths of the beveled face a which may be caused by the adjustments of the nut and contact rod or piece.

To prevent the pressure roll 23 from rising above a predetermined height. and from possiblymilliding with the scrafing-lrniwe 24, after the roll has advanced from under the table 18, I provide the stop members 85, 86 (Figs. 4, 4 and 4). '1 he member is a curved yoke pivoted on the pin .38. and the member Sl' is a stop screw engaged with a tapped orilice in an car 87 on the block 77, said car being provided with a strip 88 projecting under the member 85. and preventing the yoke 85 from swinging downwardly. \Vhen the slide '14 and the scarfing-knife are retracted. the n'iembers 85 and 8i) are some what widely separated. as shown by Fig. 4;. A movement of the connecting-rod 29 from the position shown by Fig. land in the direction of the. arrow. causes the member 85 to approach the member S 'i, as shown by Figs. 4 and 4 and when the connectingrod is at the end of said movement, the member 85) abuts against the mcn'iber 86, as shown by F ig. l. The member 86 then acts through the member 85. the arms 27. 26, and the rock-shaft 16 to prevent the pressure roll from rising above a predetermined height, or, in other words, to a height bringing the upper side of the pressure roll into the path of the scoringdtnife ii.

The operation is as follows: The condition of the machine when it is at rest is as shown by Fig. l. the starting-knife 1". and scoring knife 24 being retracted. the table 18 raised. and the pressure roll .32; lowered. The operator standing at what is the right hand end of the machine in Fig. 4. now inserts the leading end of the stock a through the space between the table and the scarling-knife and pressure roll until the waste part s to be removed projects sulliciently over the pressure roll. The clutch members are then engaged to start, the machine. The eccentric moving from the position shown by Fig. 4. to that shown by Fig. l, presses the table downwardly against the upper side of the stock, and raises the pressure roll against the underside of the stock, a portion of which is now held between the roll and table for the action of the knives. The portion of the stock thus held is inclined relatively to the path of the scarfing-knife. The upward movement of the ressure roll being new arrested by the stock the continued movement of the eccentric to and beyond the position shown by Fig. 4", causes the roll and the scarfing-knife 12 to move forward, the scarfing-knife entering the stock and the roll being in rolling contact with the stock and holding the same firmly in a fixed position against the pressure of the knife. The scarfing-knife is therefore caused to cut obliquely through the stock from the lower to the upper side. Before the scarfingknife completes its cut, the scoring-knife is quickly projected to form the transverse cut a Fig. 8). and is then retracted before the scarfing-knife reaches the end of its forward movement (Fig. 4). After the scoring-knife completes its out, said knife, the table. and the pressure roll, return to the positions shown by Fig. 4, and the machine stops. If desired, the scoring-knife may entirely sever the stock, although I do not recommend this, it being preferable to leave the waste-leading end of the stock in the condition shown by Fig. 13. The downward pressure of the stock by the table against the edge of the scoring-knife when the latter is retracted, causes the knife to form a well defined obtuse angle a (Fig. 14). on the underside of the stock, said angle being straight from edge to edge of the stock, so that when two scarfed ends are cemented together, the angle 8' of one piece will form a straight joint with the angle 8 of the other piece, as shown by'Fig. 15.

It. will be seen that the machine is adapted to scarf different thicknesses of stock Without necessity of adjustment to compensate for variations of thickness, the scarfing-cuttel having no forward movement until the pressure roll comes to a bearing on the stock, whatcvcr may be the thickness of the latter. it will also be seen that the pressure of the roll 13 against thc stock is directly proportioned to the resistance offered by the stock to they movcmcnt of the scarfing-knife through it. This is because the roll 23 is prcsscd against the stock by the power which projects the knife. said power being exerted through the rock-shaft 16 and the arms 26 and 27 on the slide 14 and on the pressure roll simultaneously. The pressure roll. therefore. holds the stock firmly against the table during the scarfing cut, against the possibility of its displacement; by the pressure of the scarfing-knife against 1 it, whatevere the pressure due to the resistl ance of the stock to the movement of the knife may be. When the stock is of the maximum thickness and width its resistance to the movement of the knife and the tendcney of the knife to displace or move it forward is greater than when the stock is relatively thin and narrow. The resistance of the stock to the movement of the knife also varies with the hardness or density of the stock, and the sharpness of the knife.

The machine, therefore, requires no adjust- I ment to enable it to scarf pieces of stock of dili'erent thickness, width and density, or hardness, and the stock is held more firmly against a dull knife than against a sharp one.

The rocking or oscillating table 18 having the acute angled edge on the axis of oscillation and practically in the path of the edge of the scarting-knife, is an important feature of the machine, one side of the table supporting the stock in the oath of the scarfing-knife, and the opposite side guiding the scoring-knife in a path which intersects the path of the scarfing-knife.

As will appear by reference to Fig. 15, two parts a which have been scarfed as described, may be cemented together to form a sm oth joint, one of the parts having a minute shoulder a (formed by one side of the scoring-cut a) exactly parallel with the angle s" of the othcr part. the two sides of the strip formed by said cemented parts We senting flush surfaces and straight joints.

The connecting-rml 29 is preferably adjustable in length and composed of two end mcmbcrs Q9. and an intermediate turnbuckle member 29, having right and left sci'e\\'thrcads engaged with corresponding internal threads in the end members and rotatable to vary the length of the connecting-rod.

The rock-shaft 1(3 and arms 26 and 27 constitute an oscillatory carrier for the pressure roll 23. Said carrier may be of any suitable construction adapted to operate in the manner described.

I claim:

1. A, scarfing machine, comprising, in combination. a table. a scarfing-knife movablc in an inclined path relatively to stock backed by the table. mcchanism governed by the thickness of the stock for successively confining the stock and operating the knife, said mechanism in luding a pressure member movable indcpcndcutly of the knife to press the stock against the table, and in unison with the knife, and means caused by contact of the pressure member with the stock to move the knife and pressure member for ward in unison.

9. A scarfing machine conu'irising. in combination. a table. a scarfing-knife movable in an inclined path ielatively to stock backed by the table, a pressure roll and means cooperating therewith for causing the roll to confine the stock and for operating the knife when the stock is confined, the operation of the knife being governed by the thickness of the stock.

3. A scarting-maehine comprising, in combination, a table, a slide movable in an inclined path relatively to stock backed by said table, a scarling-knife attached to said slide. an oscillat ry carrier mounted on the slide, a pressure roll mounted on said carrier and reciprocating mechanismconnected with the ca rrier and operating, first, to press the roll against the stock, and then project the slide, knife, and roll in unison.

4. A. scarfing machine comprising, in combination. a table, a slide movable in an inclined path relatively to stock backed by said table. a scarling-knife attached to said slide, an oscillatory carrier mounted on the slide, a pressure roll mounted on said carrier, and reciprocating mechanism connected with the carrier and operating, in one direction to first press the roll against the stock and then project the slide, knife and roll in unison, and in the opposite direction to first move the roll from the stock and then retract the slide knife and roll in unison.

5. A scarfing machine comprising, in combination. a table, a slide movable in an inclined path relatively to stock backed by said table. a scarfingdmife attached to said slide, an oscillatory carrier mounted on the slide, a pressure roll mounted on said carrier. and reciprocating mechanism connected with the carrier and operating in one direction to first press the roll against the stock and then project the slide, knife, and roll in unison, and in the oppositedirection to first move the roll from the stock and then retract the slide, knife, and roll in unison, the slide being provided with an adjustable contact piece which limits the retraction of the knife.

6. A scarfing machine comprising. in combination, a table, a slide movable in an inclined path relatively to stock backed by said table, a scarfing-knife attached to said slide. an oscillatory carrier mounted on the slide. a pressure roll mounted on said carrier. and reciprocating mechanism connected with the carrier and operating in one direction to first press the roll against the stock and then project the slide. knife, and roll in unison. and in the opposite direction to first move the roll, from the stock and then retract the slide. knife, and roll in unison, the slide being provided with an adjustable contact piece which limits the retraction of the knife, and with means for indicating, the pol sition of said contact piece.

7. A scarfing-machine comprising, in combination. a table, a slide movable in an inclined path relatively to stock backed by said table, a scarfing-knife attached to said i slide, an oscillatory carrier mounted on the slide, a pressure roll mounted on said carrier, a power driven operating shaft. and a connecting-rod rcciprocated by said shaft and connected with said carrier, a movement of said rod in one direction first pressing the roll independently against the stock, and then projecting the slide, knife, and roll in unison, the slide being provided with a contact piece against which the connecting-rod abuts, when moving in the opposite direction, to retract. the slide, knife, and roll in unison.

8. A scarfing machine comprising, in combination. a table, a slide movable in an inclined path relatively to stock backed by said table, a scalding-knife attached to said slide, an oscillatory carrier mounted on the slide, a pressure roll mounted on said carrier, a power driven operating shaft, and a connecting-rod rcciprocated by said shaft, and connected with said carrier, a movement of said rod in one direction first pressing the roll independen ly against the stock, and then projecting the slide, knife, and roll in unison, the slide being provided with a screw-threaded contact piece against which the connecting-rod abuts, when moving in the opposite direction, with a laterally confined nut engaging the contact piece and rotatahle to adjust the latter.

9. A scarfing machine comprising, in combination. a table, a slide mo able in an inclined path relatively to stock backed by said table, a scarting-ki'iife attached to said slide, an oscillatory carrier mounted on the slide, a pressure roll mounted on said carrier. and recipro ating mechanism connected with the carrier and operating. first. to press the roll against the stock. and then project the slide, knife. and roll in unison, and means for positively rotating the roll While it. is moving with the knife.

10. A scarfin z machine comprising, in combination. a ta le, a slide movable in an inclined path relatively to stock backed by said table, a scarfing-knife attached to said slide,-an oscillatory carrier mounted on the slide, a pressure roll mounted on said carrier, reciprocating mechanism onnected with the carrier and operating. first, to press the roll against the stock. and then project the Slide, knife. and roll in unison, the roll being provided with gear teeth, and swingint, racks confined against endwisc movement and meshing with said gear teeth to positively rotate the roll when it is moving with the knife.

11. A scarfiug machine comprising a table, having a stoclcsupporting face and a knife-guardin; face, said faces forming an acute angled edge. a scarfing-knifc movable in an inclined path relatively to said stocksupporting face, a scoring-knife movable on said guiding face, and lmife-operating mechanism timed to project the scoringknife and scarfing-knife successively, the paths of said knives intersecting at the said acute angled edge.

12. A scarfing machine comprising, in combination, a table having a stock-supporting face and a knife-guiding face, forming an acute angled edge, a scarfingknife movable in an inclined path relatively to the stock-supporting face, means for reciprocating the scarfing-knife, a scoringknife movable on said guiding face, a rockshaft having arms connected with the scoring-knife, and means for oscillating said rock-shaft to reciprocate the scoring-knife.

13. A scarfing machine comprising an oscillatory table having a stock-supporting face and a knife-guiding face forming an acute angled edge on the axis of oscillation of the table,.a scarfingknife movable in an inclined path relatively to said stock-supporting face, a scorin knife movable on said guiding face, kni e operating mechanism' timed to project the scoring-knife and scarfing-knife successively, the paths of said knives intersecting at the said acute angled edge, and mechanism for oscillating said table to move its stock-supporting face toward and from the path of the scarfingknife.

14. A scarfing-machine comprising an oscillatory table having a stock-supporting face and a knife-guiding face forming an acute angled edge on the axis of oscillation of the table, a scarfing-knife movable in an inclined path relatively to said stock-supporting face, means for reciprocating the scarfing-knife, a scoring-knife movable on said guiding face, a rock-shaft journaled in bearings on the table and having arms loosely connected with the scoring-knife, and means for oscillatin said rock-shaft to reciprocate the scoringnife.

15. A scarfing machine comprising, in combination, a table having a stock-supporting face and a knife-guidin face forming an acute angled edge, a slideiaving a scarfing-knife movable in an inclined path relatively to said stock-supporting face, a scoring-knife movable on said guiding face,

means for reciprocating the scoring-knife, an oscillatory carrier mounted on said slide, a pressure roll mounted on said carrier, reciprocating mechanism connected with the carrier and operating to first ress the roll against stock supported by t e table and then project the slide, knife, and roll in unison, and complemental stop members on the carrier and slide whereb movement of the roll into the path of t e scoring-knife is prevented.

16. A scarfing-machine comprising, in combination, a reciprocating scarfing-knife, a movable table having a stock-supporting face which is inclined relatively to the path of the knife, and means cooperating with the table for exerting pressure on the stock to hold it against the thrust of the knife, said means having provisions for proportioning the stock-holding pressure to the resistance offered by the stock to the movement of the knife.

17. A scarfing machine comprising, in combination, a reciprocating scarfing knife, an oscillatory table having a stock-support ing face which is inclined relatively to the path of the knife, one edge of said face coinciding with the axis of oscillation of the table and with the path of the knife edge, and means for moving said table to cause the stock supporting face thereof to press the stock against the knife edge when the latter is retracted.

18. A scarfing-machine comprising, in combination, a reciprocating scarfing-knife, a table having a stock-supporting face which is inclined relatively to the path of the scarf ing-knife, and a knife-guiding face inclined relatively to the stock-supporting face, a reciprocating scoring or ointing knife movable on said guiding ace, and means cooperating with the table for holding the stock against the thrusts of the said knives.

In testimony whereof I have affixed my signature, in presence of two witnesses.

HARRY LYON.

Witnesses:

C. F. BROWN, P. W. Pnzznr'rr.

Images