US1413712A - Scarfing machine - Google Patents

Description

D. EISlNGA- SCA-RFING MACHINE.

' APPLICATION FILED APR.25. 19m.

' Patented Apr.25, 19 22.

6 SHEETS-SHEET 2 nnnnlu .3

ILI i w v l (ill-I .55/47/4 I INVENTOR Dir/i 15 115/17? 4 A'TQTORNEY D. EISINGA.

SCARFING MACHINE.' APPLICATION FILED-APR. 25. ms

1,413,? 12. Patented Apr. 25, 1922..

INVENTOR Of/'15 fl'lnyv ATTORNEY D. EISINGA. SCARFINQ MACHINE. APPLICATION FILED APRL25.1918.

INVENTOR D/r/Y [1L5 l'nya ATTORNEY D. EISINGA.

I SCARFING MACHINEL' APPLICATION FILED APR.25. 1918/ 2 2. 96 IT an 5 24 H d m .w a P INVENTOR I Dir/f [/'.s1'nye ATTORNEY DmKEIsinGA, OFSEATTLE, wes'mns'roiv, Ass eNoR TO AMES sHIr BUILDING AND DRY DG'CK COMPANY, or SEATTLE, WASHINGTON, A ooaroaa'rron 0F WASH- INGTON.

SCARFING MACHINE.

Specification of Letters Patent. Patented A 25 1922 Application filed April 25, 1918. Serial No. 230,823.

To all whom it may concern:

Be it known that I, DIRK EISINGA, ajcitizen of the United States, residing at Seattle, in the county of King and State of \Vashington, have invented a certain new and useful Improvement in Scarfing. lWlachines, of which the following is a specification.

This invention relates to scarfing ,machines and more particularly to scarfing machines employed in. ship building and in other industries where heavy and unwieldy plates or other parts are to be scarfed or beveled,

Heretofore it has been the practice, in scarfing ship plates and the like, to regulate the slope of the scarf by adjusting the plate relatively to the machine, or adjusting the machine as an entirety to the plate. This method of scarfing has been slow and cumbersome owingto the fact that the plates, frequently weighing many tons, are

exceedingly difficult to handle, especially when the plates must be accurately positioned to produce a scarf having the desired slope or inclination. Moreover, it is very difficult accurately to reproduce a scarf by this method owing to the difhculty in accurately positioning the plates. V

The principal object of the present inven tion is to provide a scarfing machine adapted to be readily transported and positionet. other piece of stock need not be relatively to a plate or to be scarfed so that the stock moved or adjusted in position. Thus the machine may be applied to the stock in whatever position the stock may be sup-- ported or at whatever angle the stock may be blocked up.

Other primary objects of the inventionv are to provide a scarfing machine which may readily be clamped to a plate or other piece of stock, which may be accurately adjusted to out which automatically feeds the cutting tool along the stock, which automatically stops the feeding of the cutting tool when the scarf is completed, which may be fed manually fords a quick and ready shiftfr'om automatic to'manual feed and vice .versa, which has improved means for indicating the slope or inclination to which thejniachine is adjustedsuch that a skilled mechanic is not required to set the machine, and which by a scarf of any desired slope,

as well'as automatically, which afvirtue of its'ready adjustment and automatic operation requires little attention.

To the end of attaining theaforesaid obects I provlde a machine having attach-- inent means adapted to be attached to the stock and having movable cutting-mechanism tlltably mounted on the attachment means; The attachmentmeans is preferably lnthe form of a bed plate and means, preferably mounted on the bed plate, is provided to clamp or otherwise secure the bed plate relatively to the stock. The cutting mechan1s1n 1s tiltably mounted on the bed plate through the medium of a tiltable carriage support and a carriage mounted to move in opposite direction, thecarriage support be which,

Figure 1 is a top plan of the preferred embodiment of my improved scarfing machine, parts being broken away;

Figure 2 is a side elevation of the machine, certain parts beingshown in ver tial longitudinal central section; V

Figure 3 1S a detailofthe tilting mechanism viewed from the side of Fig. 1;

Fig. 4 is a side elevation of the attachment means .or bed plate;

Figure 5 .is a top" plan of the carriage support;

Figure 6 is a side elevation of the carriage;

Figure section ofthe tool carrier taken on the line 7-7 of Fig. 2

Figure 8 is a horizontal section of the,

7 is a vertical transverse central I i tool carrier taken on' line 8-8 of Fig. 7;

Figure 9 is a horizontal section of the clamping mechanism taken on line 9-9 of Fig. 2; I

Figure 9i is a perspective view of the key-' pin shown in Flg. 9;

mechanism Figure 10 is a side elevation of the indicating mechanism;

Figure 11 is a top plan of the indicating mechanism, the associated parts of the machine being shown in section;

l igure 12 is aside view of a portion, of a ships hull where three plates come together to form a joint;

Figure 13 is a section. on line 13-13 of F ig. 12;

Figure 1 1 is a perspective view of a plate having one corner scarfed;

Figure 15 is a side view of a joint formed by two hull plates and a longitudinal beam joined together in accorc ance with the I'serwood system of ship building;

Figure 16 is a section on line 1616 of Fig. 15; and

Figure 17 is a perspective view of a plate showing a scarf adapted to the lserwood system of construct-ion.

The embodiment of my invention chosen for the purpose of illustration comprises in general a bed plate 19, a tiltable carriage support 36, a carriage 50, mounted to move in opposite directions, cutting mechanism 105, and a motor 53 for driving the cutting and for feeding the cutting mechanism along the stock during the cutting operation.

The bed plate 19 comprises a horizontal plate 106 and two arms 20 extending downwardly from the right-hand end thereof and thence under the plate 106 with their upper surfaces in parallelism with the bed plate. The bed plate is provided with a plurality of transverse strengthening ribs as shown in cross section in Fig. 2, and also with a plurality of openings extending vertically therethrough for the purpose of reducing the weight of the plate and for the purpose of permitting certain parts of the mechanism mounted above the bed plate to extend therethrough. Thus I employ the term bed plate to denote a basewhich is not necessarily a continuous plate but which is preferably substantially flat on its lower surface so that the stock S may be clamped or otherwise held therealong.

h v preferred means for clamping the stock against the lower side of the bed platecomprises two pairs .of screws 22 and 23 journaled in the horizontal web 21 extending horizontally between the underlying portions of the arms 20. The screws 22 and 23 are provided with integral collars 107 resting in recesses in the upper surfaces of the rib 21 and the threaded upper ends of the screws are provided with nuts 108. Besting on the upper surfaces of the nuts 108 is a platform 24 adapted to bear against the lower side of the stock and clamp the stock against the bottom 106 of bed plate 19. The platform 24 is provided on its lower side with hexagonal recesses fitting over the hexagonal nuts 108 to prevent rotation of the nuts when the screws are rotated.

The mechanism for rotating the screws 22 and 23 is illustrated in detail in Fig. 9 and is comprised as follows: A shaft 29 is journaled at its opposite ends in vertical ribs 109 and 110 extending transversely between the arms 20, and surrounding a portion of the shaft 29 is a tubular shaft 27. The shaft 29 is provided with a worm gear 28 meshing on opposite sides with worm wheels fast on the lower ends of the screws 23, and the shaft 27 is provided with aworm gear 26 meshing on opposite sides with worm wheels fast on the lower ends of the screws 22. The shaft 27 terminates at its outer end at the groove 32. A shaft end member 128 fits upon the end portion of the shaft 29, to which said end member is made fast, and extends to the end of the shaft 27 A hand wheel 30 is mounted on shaft 27 and end member 128 so as to slide longitudinally.

A cap 33 serves to limit the longitudinal movement of the wheel and keep it upon its mountings. A pin 31 is mounted in the recess in the wheel 30 so as to be pressed inwardly, this pin being wedge-shaped as illustrated in Fig. 9. When the pin extends into both the key-ways 111 and 112, in the shaft 27 and cap 33 respectively, rotation of hand wheel 30 produces rotation of both the shafts 27 and 29, but when the wheel is moved laterally of the groove 32 sothat the pin 31 extends only into one of the .keyways, one of the shafts may be rotated independently of the other shaft. .Vhen the pin extends only into key-Way 111 rotation of the wheel 30 produces rotation of the shaft 27 and screws 22 thereby raising or lowering the outer end of platform 24. When key 31 extends only into key-way 112 rotation of the hand wheel produces rotation of the shaft 29 and screws 23 thereby raising or lowering the inner end of the platform 24. Thus by shifting the hand wheel. 30 to opposite sides of the groove the inner and outer ends of the platform 24 may be raised or lowered independently,

thereby affording means for adjusting-the platform 21 to irregular plates.

The carriage support 36 1s rectangular in plan outline as shown in Fig. 5 and is pro-,

vided intermediate its endswith trunnions 35 and 35 adapted to be supported in bearings 34 on the opposite sides of the bed plate 19. In side elevation the carriage support tapers in both directions from the trunnions 35 and35 as shown in Fig. 2 and extending between the sides of the carriage support are transverse bracing ribs shown in cross section in Fig.2. As shown in 7 the carriage support is provided with dovetail guideways 52 on opposite sides thereof to receive guides 52' on the bottom of the tool carriage later to be described.

The mechanism fortilting the carriage support on the bed plate 19 about the trunnions comprises a crank shaft 38 journaled at its opposite ends in bearings 37 in bed plate 19 (Figs. 1 and 4) and extending throughout its central port-ion through a block 39 slidingly mounted on the bottom of the carriage support, the block 39 being arranged to slide longitudinally of the carriage support on guides 40. The crank shaft 38 is provided at one end with a worm gear 41 keyed thereto and in mesh with this worm wheel is a worm gear 42 mounted on the end of shaft 43 (Figs. 1 and 3). The shaft 43 is journaled in bearings 104 and 114 in the bed plate 19 and is provided on the end opposite to the worm gear 42 with a hand wheel 44 for adjusting the mechanism and with a lock nut 45 for locking the mechanism in adjusted position. Thus by rotating hand wheel 44 the crank shaft 38 is rotated thereby tilting the carriage support 36, the block 39 sliding along the guideway as the crank shaft rotates. )Vhen the carriage support has been adjusted to the proper angle the lock nut is tightened to hold the mechanism in this position during the scarflng operation.

The tool carriage has substantially the same plan contour as the carriage support 7 36 and as shown in-Fig. 6 the carriage is provided with a pedestal 113 for supporting the tool carrier.

The tool carriershown in section in Figs. 7 and 8 comprises a collet 61 extending vertically into the tubular shaft 59 which carries intermediate its length a worm wheel 58 for rotating the tool. Fastened to the upper face of worm wheel 58 by means of screws 58 is a sleeve 63 provided on its outside with a worm 62. In order vertically to adjust the tool mounted on the collect 61 a screw threaded sleeve 76 is provided around the upper end of shaft 59, the worm sleeve abutting against the'bearingring 115 at its lower end and against the nuts 116 secured to the upper end of the shaft 59. Surrounding the sleeve 76 is a sleeve7 7 having inner thread meshing withthe thread of sleeve 76 and a wheel 79 is provided for rotatin the sleeve 77. A flange 78 is provided fit the lower end of threaded sleeve 77 to serve as a thrust bearing, a bearing ring 118 being provided between the flange 78 and the flange 117 on the upper end of worm'sleeve 63. A look nut 80 is provided above the hand wheel 79 to lock the hand wheel in adjusted position. By rotating the hand wheel 79 the tool carrier is raised or lowered and by tightening the nut 80 the carrier is locked against vertical movement in adjusted position. Power is transmitted to the gear wheel 58 from motor 53 through I the medium of spur gears 54 and 55 (Fig.

1), shaft 56 and worm 57.

extends loosely through lugs 138 extending upwardly from the carriage support (Fig.

5) and threads through a nut 48 disposed between the lugs 138, thenut 48 being pre-' vented from rotating owingito the fact that -its lower side is disposed in juxtaposition to the base of the carriagesupport. 1 Thus when the screw 51 isrotated in bearings 100 and 101 the tool carriage is moved longi tudinally of the carriage support as the worm shaft 51 travels through the stationary nut 48 on 'thecarriage support. 7

In order automatically to feed the :tool carriage longitudinally of the carriage'rsupport duringthe scarfing'operationthat is, forward (the front being that portion ofthe machine-where the arms 20 are positioned and said forward direction being the only waythat the machine is designed to cut)-I connect the screw 51 to the motor 53 and thisconnection is preferably effected at a point in the transmission system intermediate the motor and the scarfing tool. Thus-in Figs:

7 and 8 I have shown a shaft 66 disposed transversely of the shaft 59 and carrying a worm wheel '64 meshing with the worm 62 r on sleeve 63. Shaft '66 is geared to a shaft 69 by means of bevel gears 67 and 68' (Fig;

1) and the shaft 69 is gearedto therscre'w 51 by meansof bevel gears 70'and 71. Thus the screw '51 is" automatically advanced through the nut 48 asthe scarfing tool 47 is rotated. I

At times it is desirable to move thetool carriage by hand, --as for example when rapidly retracting the carriage preparatory to making a new cut, and I therefore pro vide mechanism for disconnecting the carriage feed from the'motor and for reciprocating the carriage'by hand. As illustrated in Fig. 8 this mechanism comprises a cone clutch 75 fitting into a conical recess in the back of gear 64, the clutch 75 being formed integrally with a sleeve surrounding the shaft 66 and'carryingat its outer end a hand wheel 73. A nut 74 is rotatably mounted on the small end of shaft-66 and is threaded into a'recess in the end of hand wheel 73. The nut 74 is prevented from moving longitudinally {of the shaft 66 by the nut and washergl26 so that, as 'it is rotated, itadvances or retracts the sleeve 120 along the shaft 66; When the sleeve-120 is advanced into contact with the conical recess in 7 gear wheel 64 the shaft" 66 is rigidly connected with the sleeve 65*carrying the gear wheel 64 and inasmuch asthe sleeve 120 is keyed to'shaft 66 at 121, power may be transmitted from the tool carrier to the feeding mechanism through gears-62 and 64, clutch 75, sleeve 120, shaft 66, gears 67 and 68, shaft 69, gears 70 and 71. However, when the clutch is disengaged from the gear 64 by nut 74 the feeding mechanism may be operated by rotating the wheel 73, rotation of wheel 73 rotating shaft 66 through the medium of key 121.

In order to indicate the scarfing angle to which the apparatus is adjusted I provide the following mechanism: An arm 81 is fixedly mounted on a pin 122 extending.

axially from the trunnion 35 and in association with the arm 81 I provide a hori zontal scale member 83 and a vertical scale member 84, the scale member 83 being mounted on a bracket 82 and the scale member 84 being adjustably mounted along the scale member 83. The scale member 83 is mounted parallel to the bed plate 19 and perpendicular to the axis of the tiltable support andthe scale 84 is disposed perpendicularly to the scale 83 and perpendicularly to the stock. Asthe tiltable support is rotated on trunnions 35 and 35 the arm 81 moves along the scale member 84. By adjusting the scale member 84 along the scale member 83 to a point displaced from the axis of the trunnions a distance equal to the length of the scarf to be cut and by tilting the support until the arm 81 registers the thickness of the stock on scale 84 the mechanism may be adjusted to cut ascarf of the desired scope or inclination.

In order to adjust the carriage support laterally I provide a screw 86 threaded axially into the trunnion 35 and journaled in a bracket 123, a hand wheel 85 being provided on the outer end of the screw to rotate same. As the screw 86 is rotated the entire carriage support is forced to one side or the other, the trunnions sliding longitudinally in the bearings 34.

A suitable'means for suspending the apparatus so that it may readily be applied to a plate or other piece of stock comprises 'U-.

shaped members 18 pivotally connected to lugs 124 on the bed plate 19 and connecting at their upper ends with chains 125 or other suitable supporting means.

The operation of the apparatus is as follows: The apparatus is positioned with the plate S disposed as shown in Fig. 2 and the platform 24 is then raised by means of hand wheel 30 until the machine is tightly clamped to the end of the plate. It will be noted that the scarfing operation is confined to a small portion on .one corner or at the end of a plate. On account of this and the action of the rotary knives, particularly strong vibratory movements are set up in the plates or stock, which vibratory movements would seriously interfere 'with the cutting of smooth scarf if not counteracted. The novel mode of operation of my machine is specially designed to overcome such interfering vibratory action. by being adapted to utilize the weight of the machine itself to hold the plate down firmly and nullify the vibratory tendency. This purpose is also further attained by adapting the clamping means to reinforce and support every portion of the plate subject to the pressure of the rotary knives.

The tiltable carriage is adjusted to the proper angle to cut a scarf of the desired slope by rotating hand wheel 44. The tool carriage is adjusted longitudinally of the carriage support by hand wheel 73 (with clutch disengaged from carrier 64) until the scarfing tool 47 is immediately above the forward edge of the scarf to be cut. The tool carrier is vertically adjusted by hand wheel 79 until the tool 47 is substantially in contact with the stock. By means of hand wheel 85, the carriage guide 36with all the upper parts is moved transversely until the knives are precisely within the side lines of the scarf to be cut. The clutch T5 is then forced into engagement with gear wheel. 64 by means of nut 74 and the motor is started. As the cutting tool rotates the tool is advanced into the stock by the screw 51 and the operation continues until the scarf has been completely cut, the cutting tool having proceeded from the thin to'the. thick part of the section to be cut away, said thick part being ordinarily equal to the thickness of the plate to be scarfed. The direction of the feed andof the cutting is of the utmost importance because it avoids the necessity of causing the rotary cutter to go through the cutting operation two or more times to cuta single scarf, which is necessary when proceeding in. the opposite direction, because in operatin in such oppositc directi'on if a section is not first cut off the plate at the end portion buckles,thereby deforn'iing the plate and interfering with the operation of the knives. Also, by causing the rotary knife to move forward in the direction specified. by me, I cause the knives to hold the plate'in 'Iixed'position against the arms 20, thereby preventing longitudinal displacement of said plate or stock and also do I cause said knives to press the stock against the arms 20. Owing to the-fact that the opening 46 in the carriage support and the corresponding opening in the bed plate extends entirely to the end of the machine the tool may be advanced beyond the end of the scarf without engaging any part of the machine,

1 preferably provide means for automatically stopping the feed when the scarf has been cut and a suitable means for this pur-. pose comprises terminating the screw 51 at a point 72 somewhat short of the end of the shaft. Thus when the threaded portion of the screw 51 has passed beyond the nut 48 the carriage feed is automatically rendered ineffective further to advance the carriage. i I

In Figs. 12 to 17 I have illustrated certain types of scarfed plates to show the type of scarfing to which my machine is particularly adapted but it Will be understood that the machine is not restricted to Work of this particular character. In the construction illustrated in Figs. 12 to-13 the scarf 126 is produced at one corner of plate A so that the three plates A, B and C may be joined together as illustrated in Figs. 12 and-13. In the Iserwood construction illustrated in Figs. 15, 16'and 17 the scarf 127 is produced intermediate the sides of'plate D so that the channel member E may lie'fiush along one side ofthe plates D and F Whenflfitted together. V

I claim:

1. A scarfing machine comprising a base WlliCh rests throughout its length upon the plate or stock to be cut, forming thereby 'a stable bearing for said machine as respects said stock to overcome vibration, said base having means for clamping said stock, supporting means adjustably mounted on the attachment means and cutting mechanism 'adjustably mounted on the supporting means. Y j

2. A scarfing machine comprising a base Which rests-throughout itslengtlrupon the plateor stock to be cut, forming thereby a stable bearing for said machine as respects said stock to overcome vibration, said base having means for clamping said stock, supporting means adjustably mounted onthe attachment means 'for angular adjustment about an axis extending across the. stock, and .cutting mechanism adjustably mounted on the supporting means.

3. A scarfing machine comprising a bed plate disposed to cause said machine to rest upon the stock to be out throughout the length of said bed plate, forming thereby a stable bearing forsaid machine as respects said stock, to overcome vibration,mear1s for clamping the bed plate to the stock and cutting mechanism adjustably mounted on the bed plate.

1. A scarfing machine comprising a bed plate disposed to cause said machine torest upon the stock to be cut throughout the length of said bed plate, forming thereby a stable bearing for said machine as respects said stock, to overcome vibration, means for clamping the bed plateto the stock, and cut ting mechanism adjustably mounted .on the bed plate for angular adjustment about an axis extendingacross the stock,

5. A scarfing machine comprising attachment. means disposed to bear throughout its length directly upon the upper surface of the stock and also disposed to support the stock on its un side, a carriage support tiltably mounted on the attachment means and. a tool carriage movablymounted on the carriage support, said tool carriage feeding While engaged in the cutting operation in a direction towards the attachment means and a cutting tool mounted on'the carriage, said tool serving While cutting to supplementarily fixedly hold the stock against displacement by pressing the same against that part of the attachment means disposed'to support the stock on its under side.

6. A scarfing machine comprising attach- I ment means adapted to be secured to the stock, a carriage support havingtrunnions journaledat opposite sides of theattachinent means, and a tool carriage mounted to move in opposite directions on the carriage support.

A scarfing machine, comprising attachment means adapted to clamp the stock against said means, a carriage support on the attachment means, riage support about an parallel Wi'h the stock, and a tool carriage slidable'longitudinally of the carriage supp 1 s 8. A scarfing'machine comprising attachment means adapted'to be secured to; the stock, a carriage support on the attachment means, means for tilting the carriage sup.-

means for tilting the car; I

axls approximately port about an axis approximatelyparallel with the stock, means for adjusting the carriage support longitudinally of said axis, and a tool carriage slidable longitudinally of the carriage support. I 9. A scarfing machine comprising attachment means adapted to be secured stock, a carriage support tiltably mounted on the attachment means, a tool'carriage movably mountedonthe carriage support, and a tool carrier adjustably mounted on the tool carriage. v

10. A scarfing. machine comprisinga bed plate, means for securing the bed plate to the stock, a carriage support mounted on the bed plate to i matelyparallel with the stock, a tool carriagemounted on the carriage support to reciprocate longitudinally thereof, and a tool carrier adjustablymounted on the tool carriage to move to and from the stock. j v

11. A scarfing machine comprising a bed plate adapted to rest upon the upper side of the stock, whereby vibratory .rnovements in the stock are overcome,,and.one ior'more arms extending outwardly fromrone end of the bed' plate andthcnce aroundthe end of the stock and alo-ngjthe other-side of'the stock to hold the stock against the bed plate.

12. A scarfing machine comprising abed plate adapted to liealong the upper side of the stock, whereby vibratory movements in the stock {are overcome, and one or more arms extending outwardly from oneend of th be plate and thenceareun th se-El. at

to the rotateabout an axis approxithe stock and along the other side of the stock, and means mounted on said arms to clamp the stock against the bed plate.

13. A scarfing machine comprising a bed plate adapted to lie along the upper side of the stock, whereby vibratory movements in the stock are overcome, one or more arms extending from the bed plate around one end of the stock andthence along the opposite side of the stock, and a clamp adjustably mounted on said arms for clamping the stock against the bed plate.

14. A scarfing'machine comprising a bed plate adapted to lie along one side of the stock, one or more arms extending from the bed plate around one end of the stock and thence along the opposite side of the stock, and a clamp mounted on said arms" for. clamping the stock: against the bed plate, the clamp being adjustabl 7 supported at a plurality of points so that it may be fitted to the stock.

15. A scarfing machine comprising a bed plate adapted to lie along one side ofthe stock, one or more arms extending from the bed plate around one end of the stock and thence along the opposite side of the stock, a clamp mounted on said arms for clamping the stock against the plate, a plurality of spaced screws for moving the clamp relatively to the stock, a plurality of concentric shafts respectively geared to said screws, and shiftable means for rotating said shafts, said means being adapted to rotate the shafts, either jointly or independently.

16. In a scarfing machine, a bed-plate adapted to'rest on the stock and provided with downturned arms extending rearwardly beneath the body of the bed-plate and spaced therefrom to admit the edge of the stock, a tool carriage mounted to move in opposite directions on said bed plate and supported thereon over portions of the bed plate which are adapted to bear on the stock, and means to adjust the angle of carriage-movement in relation to the stock.

17. In a scarfing machine, a bed-plate adapted to rest throughout its length on the stock and provided with downturned arms extended rearwardly beneath the body of the bed-plate and spaced therefrom to admit the edge of the stock, clamping devices mounted on said arms, a tool carriage mounted to move in opposite directions on said bed-plate and supported thereon over portions of the plate which are adapted to hear on the stock, and means to adjust the angle of carriage movement in relation to the stock. p

18. A sc'arfing machine comprising a carriage mounted to move in opposite directions, means for moving the carriage relatively to the stock, a cutting tool mounted on the carriage, said cutting tool advancing at a uniform pitch during the cutting oper ation from the thin tothe thick part of the section of the stock to be cut away, a motor mounted on the carriage, a transmission means connecting the motor to the cutting tool, and other transmission means connecting the means for moving the carriage to the first transmission means' 19. A scariing machine comprising'a cariiage mounted to move in opposite directions, means for moving the carriage relatively to the stock, a cutting tool mounted on the carriage, said cutting tool advancing at a uniform pitch during'the' cutting operation from the thin to the thick part of the sect-ion of the stock to be cut away, means for driving the cutting tool, and means for connecting or disconnecting said means for moving the carriage to or from said driving moans.

20. A. scarfing machine comprising a car riage mounted to move in opposite directions, means for moving the carriage relatively to the stock, a rotary tool carrier mounted 011 the carriage, two concentric shafts, one shaft being geared to the rotary tool carrier and the other shaft being geared to the carriage reciprocating means, means to connect and disconnect said shafts to and from each other, and means to rotatethe latter shaft when disconnected from the first shaft.

21. A scarfing machine comprising a carriage mounted to move in opposite directions, a rotary tool carrier mounted thereon, said carrier advancing at a uniform pitch during the cuttingoperation from the thin to the thick part of the section of the stock to be cut away, means for conjointly rotat ing the tool carrier and moving forwardly the said carriage, and means for automatically stopping the said forward movement of the carriage.

22. A scarfing machine comprising a carriage mounted to move in opposite directions, a rotary tool carrier mounted thereon, said carrier advancing at a uniform pitch during the cutting operation from the thin to the thick partof the section of the stock to be cut away, means for conjointly rotating the tool carrier and moving forwardly the said carriage, and means for automatically stopping the said forward movement of the carriage without stopping the rotation of the tool carrier.

23. A scarfing machine comprising a bed plate adapted to be attached to the stock, a tiltable support mounted on the bed plate, cutting mechanism mounted on the support, and a crankshaft journaled in the bed plate and engaging the support so as to tilt the support when rotated.

24. A scarfing machine comprising a bed a stable bearing for said machine as respects said stock to overcome vibration, means for clamping the bed plate to the stock, a carriage guide adjustably mounted upon said bed plate, a carriage movably'mounted upon said guide having a cutting mechanism, and

means to actuate said cutting mechanism.

26. A scarfing machine comprising a bed plate provided with means at one end thereof fixedly to hold the plate to be scarfed, a carriage guide pivotedly mounted upon said bed plate, said guide being adjustable with relation to the plane formed by the surface of the plate or stock to be cut, a carriage movably mounted upon said guide having a cutting mechanism, and means to actuate said cutting mechanism.

27. A searfing machine comprising, a bed plate provided with means at one end thereof fixedly to hold the plate to be scarfed,

a carriage guide plvotedly mounted uponsaid bed plate, said guide being adjustable with relation to the plane formed by the surface of the plate or stock to be cut, a carriage slidably mounted upon said guide having a cutting mechanism, means to advance said carriage along said guide so that the cutting mechanism is advanced to the portion of the plate to be out, and means to actuate said cutting mechanism.

28. A scarfing machine comprising a bed plateprovided at one end with hook-like arms, a. clamping table supported on said arms so as to hold theplate to be-scarfed against the bed plate, a carriage guide pivotally mounted upon said bed plate, said guide being angularly adjustable relative to the plane'of the plate and said guide having mechanism to indicate the angle of the guide to the plate, a carriage slidably mounted upon said guide having a cutting mechanism, means to advance said carriage along said guide, means to operate said cutting mechanism and to move said carriage along said guide, so that the cutting mechanism is advanced automatically to the portion of said plate to be cut.

29. A scarfing machine comprising a bed 7 plate provided at one end with hook-like arms, a clamping table supported on said arms so as to hold the plate to be 'scarfed against the bed plate, a carriage guide pivotally mounted upon said bed plate, guide being angularly adjustable relative to the plane of said plate and said guidehavmg mechanism to indicate the angle'of the said 7 guide to the plate, a carriage slidably mounted-upon said guide'having a cutting mechanism, means to advance said carriage along sald guide, means to operate said cut ting mechanism and to move said carriage along said guide sothat the cutting mechanism' is advanced automatically'to the portion of said plate to be out, and means automatically to stop the advance of the carriage when the 'cuttingof the scarf is completed.

30. In a scarfing machine, a tiltable tool support, in combination with means for indicating theslope of the scarf comprislng an arm mounted to tilt with the tool support, a scale member disposed adjacent said arm in parallelismwith the stock and perpendicular to the axis of the tiltable support and a scale member disposed adjacent said arm perpendicular to said first scale member and to said axis;

31. In a scarfing machine, a tiltable tool support, in combination with means for indicating the slopeof the scarf comprising an arm mounted to tilt with the tool support, a scale disposedadjacent said arm in the stock and perpendicuparallelism with lar to the axis of the tiltable support, and a scale member disposed adjacent said arm perpendicular to said first scale member and to said axis,

ness of the scarf. 82. In a scarfing machine, atiltable tool support, in combination with means for insaid arm perpendicular to said first scale member and to sald aXlS, the second scale member being adjustably mounted on the first scale member. 7

In witness whereof, I hereunto subscribe my name this 20th day of April, A. D. 1918.

DIRK Ersnvea.

j the scales being arranged r'espectively to indicate the length andthicki port, and a scale member disposed adjacent 1

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