US833522A - File-cutting machine. - Google Patents

Description

PATENTED OCT. 16, 1906.

J; A. HESS. FILE CUTTING MACHINE.

APPLICATION FILED FEB. 13, 1904.

6 SHEETS-SHEET 1.

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No. 833,522. PATENTED OCT. 16, 1906.

' J. A. HESS.

FILE CUTTING MACHINE. APPLIOATION PI'LED FEB. 13, 1904 5 sums-53am 2.

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PATENTED OCT. 16, 1906 J. A. HESS.

FILE CUTTING MACHINE.

APPLICATION FILED IEB.13, 1904.

5 SHEETS-rSHBET 3.

ivi l'ucmes I I No. 833,522. PATE'NTED 0GT. 16, 1906. J A. HESS. I

' FILE CUTTING MACHINE.

APPLICATION FILED PEB.13. 1904.

' 5 SHEETS-SHEET 4.

No. 833,522. v PATENTED 00116, 1906. J. A. HESS. I

FILE CUTTING MACHINE.-

APPLIQATION FILED FEB. 18, 1904.

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@lmuontoz I warumw I I M -UNITED STATES PATENT OFFICE.

FILE-CUTTING MACHINE.

Specification of Letters Patent.

Patented Oct. 16, 1906.

Application filed February 13, 1904. Serial No. 193.424.

2 T on whom it may concern.-

. for moving the file-holder longitudinally and rotatably, for changing the speed at which said longitudinal movement takes place during the operation of cutting, for maintaining the file-holder in a variety of positions, for stop ing the movement of the file-holder, and or stopping the machine at any desired point.

It further consists of other novel features of construction, all as will be hereinafter set forth.

Figure 1 represents a front elevation, Fig. 2 an end elevation, and Fig. 3 a top plan view, of a file-cutting machine embodying my invention. Figs. 4 and 5 re resent, respec tively, in front elevation an in longitudinal section, a portion of the device by which the fileholder is maintained in various rotated positions. Fig. 6 represents a perspective view of a belt-shifting device that may be employed in detached position. Fig. 7 represents a side elevation of a cam and attached parts mounted on a file-holder rod. -Fig. 8 represents a cam-block in detached position. Figs. 9, 10, and 11 are respectively a longitudinal and vertical section, a front elevation, and a to plan view, on an enlarged scale, of a portlon of my device whereby the presser-foot is adjusted. Fig. 12 represents a sectional view of a portion of the gearing and its adjuncts. .Fig. 13 represents in'perspective a portion of the belt-shifting device. Fig. 14 represents a front elevation,

partly in section, of a portion of my invention in detached position.

Fig. 15 re resents a transverse sectional view of the le-holder, bed, and slide, having certain arts removed for clearness of illustration. igs. 16 and 17 represent sectional views of a portion of the bedand showing the file-holder at different angles. Fig. 18 represents an end elevation of the adjusting device. Fig. 19 re resents a plan view of a portion of the file-ho der and its adjuncts. Fig. 20 represents a plan view.

similar to Fig. 19, but artly in section and having the file removed Fig.' 21 represents a cross-section on line a: 00, Fig. 22. Fig. 22 represents an elevation of a portion of my invention, partly in section.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings, '1 designates'the base of the machine, having brackets 2, on which is mounted, by swinging brackets 3, a main shaft 4, having tight and loose pulleys 5 and 6'. On the end of the shaft 4 is a ulley 7, from which runs a belt 8 to a pul ey 9, which, by means of a shaft 10, actuates a wiper or a plurality of cams 11. Vertically movable on aguide 12 on-the front upper portion of the base 1 is a saddle 13, in which are the bearings for the shaft 10 and on the face of which is mounted a head 14, having segmental slots 15, through which pass bolts 16,

by means of which the head is attached to the saddle 13. On the head 14 is a guide 17, within which a plunger 18 is adapted to reciprocate, which latter carries a cutter or chisel 19, adjustably secured thereto. At the upper end of the plunger 18 is a rubber spring 20, which is supported within the guide 17. The tension of said spring may be varied by means of the adjusting-screw 21, on which is a lock-nut 22, by means of which it may be locked in adjusted position.

23 designates a presser-foot baradjustably carried by the head 14 and vertically adjustable therein-in the present instance by means of a screw 24, which engages an internal thread in said bar. The lower end of this bar is enlarged, as seen at 105, said enlargement having an aperture therethrough adapted to receive the sleeve 106, extending from the collar 27. The collar 27 is slotted or split, as seen at 107, and has a bolt 108,'by means of which the collar and sleeve are adjustably secured to a presser-foot rod 25, which passes therethrough.

109 designates a lug or enlargement at the end of the rod, having an opening therethrough which is angularly inclined to the rod 25 and in which the presser-foot is adjustably secured by means of a set-screw110.

28 designates an upright or support rising from the collar 27, and 31 designates a similar support rising from the enlargement 105 of the presser-foot bar 23.

28 designates a stud passing through the IIO upright 28 and provided with a threaded end nut 112, as best seen in Fig. 9, so that the stud 28 is rotatably mounted in the upright 28. 29 designates a screw provided with a hand-wheel 30 and having threaded engagement with the stud 28*. 31 designates a stud secured in a similar manner to the upright 31 so that it is rotatably mounted thereon. The outer end of the screw 29 turns freely in the stud 31, its longitudinal movement therein being prevented by means of a shoulder 113 and a plurality of nuts 114 at the outer end of the screw 29, one of said nuts serving as a lock-nut, as best seen in Fig. 11. It will be apparent that, owing to the construction, when the screw 29is actuated the presser-foot will be rotatably adjusted. The rod 25 may be longitudinally adjusted in the sleeve 106 by means of the bolt 108. The presser-foOt may be adjusted .in the lug 109 by means of the bolt or setscrew 110, and the presser-foot bar'and its adjuncts may be adjusted with respect to the head 14 by means of the screw 24. It will thus be apparent that the presser-foot may be so adjusted that it will always rest flat on the file-blank and in a line parallel with the cut made by the cutter or chisel 19.

Also attached to the shaft 4 is a pulley 32, from which a belt 33 runs to a pulley 34 on a shaft 35, which is supported at a suitable point, as at 35 in a bearing'or journal on the base 1. The pulleys 32 and 34 are detachable from the shafts 4 and 35, respectively, and may be replaced by others of different sizes for the purpose of increasing or diminishing the speed of the feeding mechanism. To insure a proper strain on the belt 33, an idler 36 is mounted on a shaft 37, adjustably secured to the base 1. At the free end of the shaft 35 is mounted a gear 37 connected in the present instance by a train of suitable gear-wheels 38 and 39 with a driving or lead screw gear 40, although it is evident that pulleys may be employed instead of the gears 37 and 40, the same being connected by a belt and having an idler adjustably mounted at a suitable point for keeping the belt tightened. As shown in Fig. 12, the gear 40 is loose on the shaft 41, which forms the extension of the leadscrew 42. At the extreme end of the shaft 41 are the jam-nuts 43 and 44, between which and the web of the gear 40 is interposed a plate 45 and one or more washers 46, which may be of leather, rubber, or any resilient material. On the lead-screw 42 is mounted a slide 47, carrying a bent arm 48, whichis secured to a cam 98, movably mounted on a rod 87, which is adjustably secured to a file-holder 86. Mounted on the slide 47 is a spindle 48 carrying in the present instance at its rear end an ordinary half-nut 49, which, as seen in Fig. 15, practically fills the chamber in which it moves, and is thus prevented from rotating,

and which is adapted to engage with the leadbrought into and out of engagement with the lead-screw 42. .Transversely movable in the slide 47 is a rod 54, held in its adjusted posi- ,tion by a setscrew 55. The rod 54 is adapted to contact at the proper time with a block 56, carried by the frame of the machine adj acent the end of the lead-screw 42. The rod 54 when adjusted in the slide 47 causes the latter'to always stop at the same point, so that the files will all be out uniformly, the block 56 acting as a stop for the adjusted rod 54 and also for the slide 47, to which said rod is secured. Adjustably mounted on the slide 47 is a rod 57, having a hooked end 58. It is evident that when the slide is moved to the left, the rod 54 having been first adjusted by the set-screw therefor, the'end of the rod will strike the block 56 and stop the movement of the slide in that direction. After the first out has been finished and the slide returned to its initial starting position that is, to the leftthe rod 54, striking the block 56, will bring the slide 47 to a stop at exactly the same position as before, which will cause all of the different cuts on the fileblank to be in alinement.

The hook 58 travels in the path of a bellorank lever 59, mounted loosely on a shaft 60, journaled in a bracket 61, which is secured to the frame or base 1. At the rear end of the shaft 60 and loosely mounted thereon is a weighted lever 62, which normally retains said lever 59 in the position seen in Fig. 1, said lever 62 being rigidly fastened to the lever 59 in any suitable manner. Pivoted at 63 to the end of the lever 59 is a link 64, which is in turn pivoted at its upper end to a latch 65, the latter being suitably pivoted at its other end to the base 1 and having a jaw or recess 66, which engages with an arm 67, on which is mounted a belt-shifting fork 68. Attached to the arm or lever 67, which is pivoted at a suitable point to the base 1, is a spring'69, adapted to move the fork 68 in a direction to shift the belt to the loose pulley 5. Also attached to the lever 67 is a chain 70, passing over a guide-pulley 71 and downward to a treadle 72, secured to the floor adjacent the machine. Pivoted in a bracket 73 on the floor adjacent the machine is a second treadle 74, from which rises a rod 75 to a lever 76. A weight 77 is suitably supported on the rod 75. The lever 76 is pivoted at its end 78 to the frame and carries an angle-iron 79, adapted to engage with a projecting flange 18 on the plunger 18 when the treadle 74 is depressed. On the plunger 18 is mounted a tappet 81,

which is normally in the path of the earns 11; but when the treadle 74 is sufficiently depressed the angle-iron 79 israised and'engaging with the flange 18 will raise the-plunger l8, and the tappet 81 will be raised above the wi er and wholly out of contact therewith.

t will be readily. seenthat the plunger '18 is unsupported in the. head except by the fileblank and that the shaft 10, on which the actuating-cam or wiper is mounted, is ournaled in the saddle, so that when the saddle is lowered the tappet instead of engaging the whole of the operative surface of the cams will engage only a small portionthereof, the amount of the operative surface of the cams which coacts with the tappet depending entirely upon the distance the saddle has been raised or lowered with respect to the initial position of the tappet, and this adjustment of the saddle and the head carried thereby may be accomplished by adjusting the presserfoot, presser-foot bar, or by actuating the lever 7 6. It will thus 'be seen that when a light out is desired the saddle is lowered, and when it is desired to make a deeper cut in the file-blank the saddle and the head carried thereby are raised. By the employment of a plurality of cams or a wiper-wheel, as seen in Fig. 2, I am enabled to construct a machine in which the cutter will strike a greater num ber of blows against the file-blank in a given time than if I employ a cam having a single operative surface.

Depending from the saddle 13 and secured thereto by a bolt 103 is a rod 82, on which is mounted a nut 83, between which and an abutment on the base 1 is a thrust-spring 84, the

tension of which may be regulated as desired by means of the nut 83. In a suitable portion of the base 1 is a semicircular longitudinal recess 85, adapted to receive a-fileholder 86. Having threaded engagement with the end of the file-holder 86 is a rod 87, which is rotatably mounted and longitudinally movable. Interposed between the rod 87 and the bracket88, as seen in Fig-.' 5, is a sleeve 89,'having a flange 9 0, to which is adjustably bolted an adjusting or locking plate 91, having transverse recesses-92 in its edge, adapted to engage with the foot 93 of a springactuated dog 94. Secured adjustably on the rod 87 is a set-collar 95, (see Figs. 19 and 20 of the drawings,) against which abuts a sleeve 96, which is loosely mounted on said rod 87 The sleeve 96 hasashoulder or flange at each end, one of said flanges abutting against the set-collar 95. Loosely mounted on'the sleeve 9.6'is acam 99, which abuts against the other flange of said sleeve and which is adapted to coact with a cam 98, secured to the arm 48. Interposed between the arm 48 and the flange of the sleeve nearest to the set-collar is a spring 97, which tends to keep the two cams 98 and 99 in contact;

100 designates a lug secured on the cam 99 and adapted to engage a groove 1101 ofta bracket 102, which latter is .adjustably attached to the frame of-the machine.

104 designates alink secured at one end to the head 14 and engaging a pin orlugonthe lever 76. This link prevents the weight 77 from moving the rod or bar 75 downwardly to such an eXtent'that it will strike against the floor 'or foundation on which the machine rests when the operator releases the pressure of his foot on the treadle 74. The angleiron .79, carried'by the lever 76, is normally maintained in such a-position that only a slight movement of the lever 76 is necessary to cause the anglesiron 79 to coact with the flange 18 to raise the plun er out of opera tive position and to raise t e head in which the plunger reciprocates.

The operation is as follows: The file-holder travels from left to right. Assuming that the machine is to be used to cuta half-round file, the file-blank is mounted on the holder 86 with its tangtoward the left, as seen most clearly in Fig. 19 of the drawings. The presser-foot bar 23 is adjusted in the head 14 so that the presser-foot will be in engagement with the file-blank when the plunger 18 isat the lowest point of its stroke,.at which time the cutter 19 is in operative relation to the fileblank. The plunger 18 is vertically reciprocated, its upward movement being caused by the action of the cam or Wiper 11 upon the tappet 81,-its downward movement being due to its own weight, assisted bythe resilient member 20. The reciprocation of the plunger 18 causes the cutter 19 to cut the teeth in the blank, which latter is fed to the right by the action of the lead-screw 42. It will be noted that the presser-foot 26, owing to the tension of the spring 84, normally rests upon the file-blank, which is drawn'thereunderby the action of the feed-screw 42. vBy means of the screw 24 the presser-foot 26 may be vertically adjusted with relation to the head 14. When the screw 24 is tightened'in the head 14, the presser-foot bar 23, with which this screw has engagement, is forced downward, thereby raising the head, and thus increasing thedistance between the latter and the file-blank. This will increase the force of the blow, as the plunger'will descend through a longer distance. i If the screw 24 is loosened, the presser-foot will be drawn upward therewith, and the distance between the head and the file-blank will be correspondingly decreased. The tappet 81- thereon will be kept at a decreasing distance from the'travel ofthe cams as the headis lowered by the adjustment of the presser-foot. The rapidity of the blow will be increased, and as the distance through which the plunger travels is decreased the forceof the blow will be also lessened, it being apparent that the greater the distance through which vthe plunger drops the greater the force of the blow imparted to the file-blank by the cutter 19. In this way the machine may be regulated so that only a light tap is made on the file-blank or so regulated that a blow may be given of enough force to out the largest and coarsest files in use. It is clear that this adjustment of the Presser-foot may be made while the machine is in operation and the depth of the file-teeth may be varied without stopping the machine. By reason of the elastic cushions or washers 46, interposed between the gear 40 and the plate 45, as the chisel strikes against the blank a slight dwell is permitted in the movement of the fileholder 86, so that the blank is not drawn forward 'until the chisel is released therefrom. It is essential in a file having a point smaller than the body thereof that the space between the teeth near the point be less than the space between the teeth on the body, and if the same blow were given by the plunger the cutter would be liable when cutting near the point to cut through the same. When the carriage 47 is moved to the left, the lug 100 engages the slot 101 in the bracket 102 and is rotated in a direction away from the operator or to the left. The set-collar 95 is essential, if it is desired to move the carriage or slide 47 and the file-holder 86 rearwardly at the same operation, because, if this were not employed, when the arm 48 of the carriagewas moved toward the left the sleeve 96 and cam 98 would .be moved to the left but the file-holder 86 would remain stationary. As this set-collar 95 is fixed to the rod 87 and the rod 87 is secured to the file-holder 86, the rearward movement or to the left of the arm 48 will cause the file-holder 86 to be moved rearwardly therewith, as is evident. It is of course to be understood that when the set-collar 95 is not employed and the lug 100 is seated in the camgroove 101 the file-holder 86 has always been moved rearwardly by hand after the carriage has been moved rearwardly and in such a manner that the locknut on the rod 87 abuts against the adjacent end of the sleeve 96 and that said end or the flange thereon, as seen in Fig. 19, will always contact with said lock-nut when the fileholder is moving forwardly. If the set-collar 95 is employed, it is fixed upon the rod 87 so as to prevent any longitudinal movement of the sleeve 96 after the locking-nut and rod have been assembled in operative relation. In all cases in which the point is smaller than the body of thefile the lug 100 of the cam 99 should be seated in the cam-slot 101 of the adjustable bracket 102 before the machine is started, and the extreme end of the file will be directlyunder the cutter. The half-nut 49 is now caused to engage the lead-screw 42, whereby the carriage 47 is moved toward the right, as is also the arm 48, connected therewith. This longitudinal movement of the arm 48 to the right will cause the lug 100 to move outward from the end of the slot in the bracket, and thus rotate the cam 99, during which operation the cam 98 will be slowly slid to the right by the arm 48, thus first imparting to the file-holder 86 a slow uniform speed relative to the movement of the arm 48. After the lug 100 is removed from the slot the movement of the file-carrier will be the same as that of the arm 48. In this way an increment is produced or, in other words, the space between the teeth of the file near the point will be slightly less than the space which exists between the teeth throughout the body of the file. The spring 97 will keep the cam 98, which is fixed or rigidly secured to the arm 48, always in contact with the cam 99; but there will be no relative movement between the said cams, except when the lug 100 and the cam 99, secured thereto, is being rotated by the coaction of said lug with the slot 101. After the lug 100 disengages from the said slot the two cams move as if they were one solid piece of material. The cam 98, which is secured to the arm 48, is mounted loosely on the sleeve 96, and the spring 97, which normally keeps the cams together, will permit the gradual relative movement of the cam 99, and thus permit a retardation in the forward movement of the file-carrier. When the cutter 19 has reached the end of the blank, the hook 58 of the bar 57 is so adjusted that it engages with the bell-crank lever 59, and thereby disengages the jaw or recess of the latch from the bar 67, which permits the spring 69 to automatically shift the belt to the loose pulley 5. The operator then depresses the treadle 74, and thereby lifts the plunger 18, so that the tappet 81 is above the path of the cams 11. The further movement of the treadle, acting through the engagement of the flange 18 with the head 14, raises the saddle 13, thereby releasing-the presser-foot 26 from its engagement with the file. It is evident that this movement of the treadle 74 is opposed by the force of the spring 84, the tenslon of which may be regulated as desired by means of the set-nut 83 on the rod 82.. This spring normally acts to hold the saddle stationary while the plunger 18 is being reciprocated by the action of the cams 11 and also acts to force the presser-foot mounted in the head, which is secured on the saddle, against the file-blank and retain the latter in position on thefile-holder. When a out has been finished, the operator by means of the handle 53 releases the half-nut 49 from its engagement with the lead-screw 42. The carriage 47 and the file-holder and its adjuncts are then returned for the next out which is to be made on the fileblank, the rod 54 having previously been adjusted. so that its end strikes the lug 56, when the file-blank reaches the same position as before. The foot 93 of cesses 92.

the spring-actuated dog 94 is now released from. its engagement with one of the recesses 92 the adjusting-plate or locking device 91., which latter is then suffi'ciently rotated, and the foot 93' will enter another of the re- It is evident that by means of the said plate the amount of rotation given to the rod and the file-holder may be varied as desired, and the rotary position given to the rod andfil'e-holder is accurately determined,

and also that the file-holder is rigidly held in its adjusted position durin the cutting operation. The adjustable rod 54 acts with the block 56 as a. stop-gage, whereby when. one cut is made and the carriage is returned for anotherv out said carriage and said file-holder will always stop at the same point, and thus insure uniformity in the finished files. It is evident that the head 14 may be rotatably adjusted on the saddle 13 by the bolts '16 thus permitting the changin of the inclination of theplunger and chise as desired. Itv

is also evident that the force of the blow given by the cutter 19 may be adjusted by means of the screw 21-, acting through the rubber or. other suitable spring 2.0.

Figs. 9,10, and 111 show in detail the manner of transversely adjusting the presser-foot 26 and at the same time changing the angle at which it bears on the file, It will'be seen that by means of] the screw 29 and handwheel? the shaft 25 may berotated' and its rotation. very carefully adjusted, so that the resser-foot will engage with the file at any desired angle. Heretof'ore in the art when the blank has been returned for the next cut the amount of rotation given to the file holder has not been accurately determined, but adjusted by the eye and on this account one cut often laps over another.. By means of' my adjusting device the uniformity of' the finished files is certain, and as adjustingplates. with any desired number of'transverse recesses therein may be used the number of cuts on each file may be varied, as desired, and owing to the stop-rod 54', which will bring the file-holder to a stop always, at the same place, the cuts will also be in alinement. It is obvious that a file of any desired number of sides may be accurately cut and also that owing to the curvature of the operative surfaces of the earns 98 and 99 and the adjustability of their action the spaces between the teeth of the file may be automatically varied at any predetermined point and that by increasing the operative surfaces of the cams and the cam-slot 101 the distance of this action may be varied as desired. By

means of the lever 76 and the, angle-iron .79

the plunger may at any time be raised so that the tappet will be out of line of the wiperwheel or kept at such a distance therefrom that the amount of operative surface of the plurality of'cams maybe varied, as desired,

and. thereby the force of the blow given by the cutter to the file-blank may be correspondingly: varied. It will be also noted mountedwithin either of'the gears 37 or 40, if so desired.

My invention is designed for cuttingnot only round or'partly-round: files, but also for the cutting of files having any desired number of sides. If a flat file is to be cut,'it is evident that the file-holder would not be rotated, and therefore the adjusting'means for rotating the file-holder would not be used, and also, that the location of said adjustingmeanswill not in any way hinderthe cutting ofthe'flat surface of'the'file-blank.

It is evident that various changes maybe made by those skilled in the art which may come within the scope of my invention, and I do not, therefore, desire to belimited in every instance to the exact construction herein shown and described.

Having thus described my invention, what. I claim as new, and desire to secure Let.- ters Patent, is

1. In a file-cuttingmachine, aframe, a reciprocating cutter-,1a longitudinally-movable file-holder, a rod connected with said. fileholder, a plate keyed to said rodso that the, rod may slide therethrough and having recesses, and means on the frame adapted to engage said recesses and maintain therotaryposition given to said rod.

2. In afile-cutting'machine, a reciprocating cutter, a longitudinally-movable fileholder,. arod adjustablysecured to said fil'eholder, an adjustable device in which said rod is longitudinally movable, said device having transverse recesses therein, and a spring-actuated dog carried by said device and adapted to engage said recesses to hold groove, a handle operatively connected with said sleeve, a file-holder movably mounted in said frame, an arm secured to said carriage,

and connections between said arm and said j file-holder.

4. In a file-cutting machine, in combination, a file-holder, means for longitudinallymoving said file-holder, a rod secured to said file-holder, an adjustingdevice keyed on said .rod, arms extending from said adjusting device, and means yieldingly actuated and engaging said adjusting device for maintaining the rotary position given thereto.

5. In a file-cutting machine, in combination, a frame, a dovetailed guide thereon, having a slot therein, a saddle mounted on said guide, a head adjustable on said saddle, a rod secured to said saddle, and extending through said slot, a connection secured to said rod and passing through a portion of said frame, a set-collar adjustable on said rod, a spring interposed between said set-collar and said frame for preventing the upward move ment of said saddle, a plunger mounted in said head, and means for reciprocating said plunger.

6. In a file-cutting machine, in combination, a frame, brackets pivoted thereon, a

driving-shaft mounted in said brackets, a

guide on said frame, a saddle movably mounted thereon, a cam-shaft mounted in said saddle and operatively connected with said driving-shaft, resilient means for holding said saddle downwardly, a head adjustably carried by said saddle, a resser-foot bar carried by said head, and vertically adjustable with respect thereto, a presser-foot carried by said bar, means for rotating said resser-foot, and a plunger mounted in said head and adapted to be reciprocated by said cam-shaft.

7. In a file-cutting machine, in combination, a frame, a file-holder mounted thereon, a rod connected to said file-holder, speedchanging mechanism engaging said rod, a

carriage, means for reciprocating said carriage, a connection between said carriage and said mechanism, and adjustable means on the frame adapted to coact with said speedchanging mechanism to automatically reduce the speed of said file-holder.

8. In a file-cutting machine, in combination, a frame, a file-holder mounted thereon, a rod secured to said file-holder, a bracket mounted on the frame, a sleeve journaled in said bracket, through which said rod is movable and to which it is keyed, an adjustingplate removably secured to said sleeve, and means mounted in said bracket adapted to engage said plate and hold it in its adjusted position.

9. In a file-cutting machine, a frame, a saddle, movable thereon, yielding means for holding said saddle downwardly, a head adjustably carried by said saddle, a plunger adapted to be reciprocated in said head, said plunger having a flange at its lower end, a file-holder movably mounted on said frame, a lever pivoted in a plane above said fileholder and at one side of said head, an angleiron carried by said lever adapted to engage said plunger-flange, a link carried by said head, a lug extending from said lever and engaging said link, and a weighted treadle in suitable connection with said lever.

10. In a file-cutting machine, a head, a

presser-foot bar adjustably carried thereby, and having an enlargement at its lower end having an opening therethrough, a sleeve adapted to fit said opening, a rod passing through said sleeve, means for adjustably securing said rod to said sleeve, an enlargement at the end of said rod having an opening therethrough atan angle to said rod, a presserfoot adjustably secured in said opening, and means for rotatably adjusting said rod during the working operation.

11. In a file-cutting machine, a head, a presser-foot bar'adjustably carried thereby, an enlargement at the lower end of said bar having an opening therethrough, a sleeve having a collar integral therewith adapted to fit said opening, a presser-foot adjustably carried by said sleeve and collar, a lug extending from said collar, a stud rotatably mounted thereon, a lug extending from said enlargement, a stud rotatably mounted thereon, a screw having threaded engagement with the stud mounted on said collar, the end of said screw turning freely in the stud carried by said other lug, and means for preventing the longitudinal movement of said screw in said last-mentioned stud.

12. In a file-cutting machine, a reciprocating cutter, a file-holder longitudinally movable, a rod secured to said fileholder, a sleeve loosely mounted on said rod, a set-col lar on said rod for confining said sleeve against the file-holder, a flange at each end of said sleeve, a cam rotatably mounted on said sleeve, a lug extending from said cam, a cam slidably mounted on said sleeve adapted to contact with said rotatable cam, said cams having operative cam-surfaces on their adj acent sides in contact, a spring interposed between the slidable cam and one of said flanges, means including an arm connected with said slidably-mounted cam for longitudinally moving the sleeve and its assembled parts, a bracket adjustably secured to the frame, having an inclined groove into which said lug may pass whereby the longitudinal speed of the file-holder may be reduced,

13. In a file-cutting machine, a frame, a guide thereon provided with a slot, a saddle vertically movable on said guide, a head carried by said saddle, a plunger operatively carried by said head, a shaft journaled in said saddle for actuating said plunger, resiliently-actuated means passing through said slot and coacting with said frame and said saddle for preventing upward movement of said head, and a presser-foot carried by said head and longitudinally, laterally and angularly adjustable with respect thereto.

14. In a file-cutting machine, a plungercarrying head, a resser-foot bar carried by said head and vertically adjustable with respect thereto, a rod carried by said bar, means for rotatably adjusting said rod, a

presser-foot adjustably carried by said rod,

and means for angularly adjusting said resser-foot with respect to said rod.

15. In a file-cutting machine, a frame, a file-holder, a rod secured thereto, a cam slidably mounted on said rod, a cam loosely mounted on said rod adjacent said fileholder, and having a lug, a bracket having a cam-groove with which said lug is adapted to engage adjustably carried by said frame, said cams having cooperating cam-faces on' their adjacent sides, yielding means for maintaining said cam-faces in contact, and means secured to said slidably-mounted cam for causing the same to move forwardly said rotatable cam and thereby advance the fileholder.

16. In a file-cutting machine, a frame, a file-holder, a rod secured thereto, means coacting with said frame, rod, and file-holder to automatically reduce the speed of the latter, said means including cams mounted on said rod having on their adjacent faces cooperating cam-faces, said cam-faces being maintained always in engagement with each other, one of said cams having a lug thereon, and said frame having a bracket fixed thereto with which said lug coacts to partially rotate the cam to which said lug is secured.

JOHN A. HESS. Witnesses:

WM. OANER WIEDERSEIM, C. D. MOVAY.

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