US737033A - Saw-filing machine. - Google Patents

Description

H m I M S D .J

SAW FILING MACHINE.

APPLICATION rum) saw. 11, 1902.

s SHEETS-SHEET '1.

' N0 MODEL.

PATE-NTED AUG. 25, 1903.

J. 1). SMITH. SAW FILING MACHINE. APPLIOATION FILED SEPT. 11. 1902.

a BHBETS-SHEET 2.

N0 MODEL.

"n4: NORRIS PETERS co, Pr-roTau'mo" WASHINGTON. n. c

PATENTED AUG. 25,

No. 737,033. J. D. S ITH.-

SAW FILING MACHINE. AIiPLIUATIION FILED SEPT. 11. 1902" a srinn'rs-snnm' s.

HOMODEL EPatented August 25, 1903.

PATENT OFFICE.

JOIIN D. SMITI-L OFB ONHAM, TEXAS.

SVAW.-FIILING MACHINE.

SPECIEIGATIONformihg part of Letters Patent No. 737,033, dated. August 25, 1903.

Application fi led September 11, 1902. Serial No. 128,018. (no modem .Other objects.andadvantages of the inven-- it'ion will berset forthi iuthe following descrip ltion, while athenoveltyithereof will form the basis of ithe claimsisucceeding such descripltion, :and said invention is clearly illustrated iinthe accompanying drawings, forming a part of this specification, and in which Figure 1 is a top plan view of my improved saw-filing machine, Fig. 2 is a vertical section taken on the line 2 2 of Fig. 1. Fig. 3 is a vertical section taken on the line 3 3 of Fig. 1. Fig. 4. is a top plan view, on an enlarged scale, of the spacing device and cooperating coupling member. Fig. 5 is a side elevation of said spacing device. Fig. 6 is; an end View of the same. Fig. 7 is a transverse section of the file-frame. Figs. 8 and 9 are detail views of the saw-clamps. Fig. 10 is a perspective View of the actuator or key for opening the jaws of the device.

Like characters refer to like parts in all the figures.

The improved device includes in its construction a pair of elongated jaws 2 and 3, the jaw 2 constituting the inner jaw, as it is attached by fastening means to the workbench or other suitable support. These jaws may be made of any suitable material. The inner jaw 2 has at suitable points in its length, on the under side thereof, depending projections or arms 4. These-depending arms are perforated to receive screws or other fastening means for securing the appliance in place, or other means may be provided for this purpose. The lower ends of the arms 4 terminate in oppositely-disposed lugs or ears 5, each having a tapped hole adapted to receive the vertically-adjustable screws 6. These screws, it will be understood, can be changed from one :lug to another upon the respective arms 4 in order to adapt them to saws of different for adj ustably supporting the'saw' below the jaws. The jaws act as a vise and'are springactuatedthat is to say, they clamp or grip the saw between their effective faces by means of a spring or springs, two of such springs being shown and each being denoted by 8. The springs are of the flat kind, and they are fastened at their lower ends to the lower ends of the armse'and are attached at their upper,

ends to a longitudinal rib 9 on the under side of the outer jaw 3. The springs exert a force sufficient to properly hold the saw against longitudinal and vertical movement while the teeth thereof are being sharpened or otherwise operated on. In the present case the lower ends of the fiat straight springs 8 have elongated slots 8 to receive the screws 4, tapped into the arms 4, by reason of which vertical adjustment of said springs can be secured, in order to bring the jaws 2 and 3 absolutely into horizontal alinement.

I have shown at 10 an actuator or key for moving the outer or movable jaw away from its companion for the purpose of inserting a saw between the said jaws. The inner end of the said actuator or key 10 has a pin 11, of substantially cylindrical form, adapted to be 12 inthe inner jaw, saidkey being provided between its ends with a second pin 13, adapted to be inserted in the longitudinal slot 14 in the outer jaw 3. It will be seen that the outer wall of this slot is rounded, so that it acts-in effect as a cam. To open the jaws the pin 11 will be inserted in the hole 12,'and the same will follow with respect to the pin 13 and slot 14. The pin 13 being toward the right end of the said slot, the actuatoror'key 10 will then be swung toward the left, and the pin 13 by engaging the rounded portion. of the slot 14 will cause the jaw 3 to be moved away from its companion, so as to permit of the introduction of the saw, the pin 11 thereby serving as thefulcrum of the actuator or key, which constitutes a lever by which considerable power can be applied to the outer jaw.

inserted in the correspondingly-shaped hole Upon the upper sides of the jaws are formed the ribs 15. The inner rib has an extension 10', which projects beyond said jaw and which is divided into two parts united together upon their under sides by the link 17, pivoted to the respective parts. One part of the extension has an obtuse angular notch adapted to receive the correspondingly-shaped end of the other part of said extension when the two parts of the latter are alined with each other. As the outer one of said two parts is shiftably mounted, it can be swung backward out of place so that the device as a whole can be more conveniently stored in a tool-chest or other receptacle. In use, however, when the parts of the extension 16 are put into line said extension can be employed for sustaining a spacer hereinafter more particularly described. YVith the exception noted the ribs are coextensive with the jaws carrying the same. The rib 15 of the inner jaw carries stops l8, horizontally slidable in perforations or bores formed transversely of said rib. When a saw is placed between the jaws, the point thereof is brought against one of these stops, which are set two inches apart to correspond with vertical holes in said rib 15 for a purpose that will herein after appear, the appropriate stopthat is, the one suited to the length of the saw-haying been moved across the space between the jaws 2 and 3 when they are opened. Any number of these steps of course may be provided, and when they are in their outer positions they are adapted to engage the bosses 19 upon the inner j aw,whieh will prevent their entire withdrawal from their perforations or bores.

To aid in inserting the saw between the jaws, I provide means for clamping the same along its teeth at different points, the clamps being denoted by 20. The lower ends of the jaws of the clamps are slitted, as at 21, to receive the plates 22, said plates being rigidly fastened in each clamp to one jaw and pivotally united to the other, so that the latter can be opened to grip the saw. The lower edges of the plates do not extend entirely to the lower ends of the jaws of the respective clamps, the distance between the two parts being equal the amount of solid sawblade, measured vertically, that is intended to show above the ribs of the jaws when the filing begins. The edges of the plates are placed hard against the bottom of the space between the saw-teeth previously to allowing the little clamps to grip the saw, and as it is intended in filing to take off, say, one sixty-fourth of an inch of the saw in depth and to leave onesixteenth of an inch of solid blade above the ribs when the filing is completed it is evident that the distance between the lower edge of the clamp-plates and the lower ends of the clamp-jaws should be one sixty-fourth plus one-sixteenth of an inch, or five sixty-fourths of an inch. \Vhen the clampsarein their operative positions, they extend at right angles from the upper or toothed edge of the saw,

and they are held in place by a bowed or V- shaped spring 23, one branch of which is fastened to one jaw of the clamp in some suitable manner,while the other branch, although free of the other jaw, bears against the same. When these clamps grip the upper edge of the saw, they are adapted to rest upon the upper edges of the jaws 2 and 3, or, more properly, upon the upper faces of the ribs 15 on said jaws, they being intended to aid in inserting the saw between the jaws of the saw-clamp and to hold the saw at exactly the proper depth in the saw-clamps till the jaws thereof are closed, whereupon these small adjusting-clamps are taken off, as there is no further use for them. When the filing to be done on the saw is of an unusual amount and the adj ustin g-clamps 2O fail to raise the saw high enough above the ribs of the jaws 2 and 3, the screws 6 may be relied upon for this purpose, they being adjusted until the slits in the blocks 7 receive the back edge of the saw and are adapted to adjust the saw vertically unaided until the teeth thereof are in proper position to be filed. Ordinarily the clamps 20 are relied upon, but in some cases it is necessary to employ the adjusting-screws for example, when some of the teeth of the saw to be filed are broken.

Normally the manner of putting the saw between the jaws 2 and 3 is as follows: First place one of the clamps 20 over the heel of the saw between two teeth, so that said clamp will stand up and at right angles to the upper edge of the saw, then thrust said saw between the jaws 2 and 3, which have been previously opened, and push it along until the point or toe comes against one of the stops 18, which has been moved into its operative position. Then support the point of the saw with the lefthand and attach the second clamp 20 near said point. The sawbeing between the jaws, the lower ends of the clamps will be set upon the upper edges of the jaws in the manner before described. \Vith the right hand placed against the saw-handle hold point of saw against the stop 18 and with the left hand close jaw 3 by the manipulation of the actuator or key 10. Then remove adjustingclamps. The saw is now ready for filing and subsequent setting. I will now set forth the means for filing the teeth of said saw.

Upon the jaws 2 and 3 is mounted for reciprocatory movement the sliding carriage 24, of substantially rectangular form, the side bars of which carry peripherally-grooved antifriction rollers which straddle and are adapted to travel upon the outer edges of said jaws. The carriage 24: sustains the saw-filing means and is moved step by step on the jaws, as will hereinafter appear, as the teeth of a saw are successively acted upon. The end bars of the sliding carriage are arched, as at 26, to support the elongated way or support 27 for the file-frame 28, hereinafter more particularly described. It will be understood that the carriage 24 is put in place after the IIO sawis clamped between the jaws 2 and 3. Upon what is shown as the left side of the" vwa-yor support 27 is a projection 29, adapted .riage 24.

saw-teeth at any desired cross-angle.

to receive the pivot-screw 30, tapped into the correspondingarch 2b of the traveling car- The opposite side or track of the way has a segmental wing or extension 31, having a series of slots or perforations 31f arranged on an arc and adapted to receive the set-screw 32, which is adapted to be threaded into an opening in the right arch of the carriage. By unloosening the set-screw 32 the way or support 27 can be swung around to vary its angle with respect to the jaws, and consequently to the saw held between the same, to thereby adapt the appliance to file WVhen the way is adjusted, the set-screw 32 will be are forced downward against the side walls passed through the registering openings in the wing 31 and arch, and this and the other set-screw 30 will be tightened, so as to firmly hold the way. The series of openings 31' are slot-shaped to allow of all wear between file holder and way being taken up by forcing the sides of way nearer together when necessary. The body of the file-frame 28, which has a re ciprocatory movement upon the way or support 27 crosswise of the saw, is adapted to carry two or more files, although it is represented as equipped with two. This file-frame is shown as being slidably supported by the way, the opposite sides of which constitute tracks therefor. To allow of the application of the saw file-frame to the way or support,

the end bars of the latter are depressed.

Upon the under side of the file-frame 28 are situated the files 33, they being fittedin dovetailed grooves or channels in the bars 34, one of said bars beingmovable toward and from its companion on the under side of the frame 28, so as to secure the adjustment of the files to suit different cases. The files are held in their grooves by the large screws 33 or other suitable means. The cross-bars of the file-frame have elongated slots extending crosswise of said frame, through which the screws 35 are passed, such screws being tapped into the upper side of one of the bars 34. By loosening these screws said bars can be adjusted transversely of the file-frame, and when adjusted the screws 35 will-be tightened. At one endof the frame 28 it is provided with depending stops, against which the ends of the files are placed to limit the endwise movement of said files. It will be understood that the bars or carriers 34 for the files are removable, said bars being detached and others inserted in their place when it is desired to change the pitch of the files. used, one for rip and the other for cut-off saws, this will not be inconvenient. The files of thegrooves, into which they are fitted by the screws 33, and as the files have the same angle it is apparent that all, even where they differ little in size, will be thrustthrough As there are only about two pitches said groove exactly thesame distance, and so take up an exactly equal hold of the saw, and it will be seen that the'side walls of said grooves are inclined and that they converge downwardly, by reason of which when the lower ends'of the holding-screws areforced against the files said files are straightened both laterally and vertically, so that each of them is caused to run in absolutely a true path with respect to the other and also to the saw. This straightening; of the files in the manner indicated is very important, as it is found in practice that the files ,donot come from. the manufacturer in an absolutely straight condition. By this means the teeth of the saw. are straightened. The file-frame has a handle 36 connected therewith in some suitable manner by which the same can be manipulated upon the way or support 27, the

will be advanced, so as to file two additional teeth, and I provide means, as will hereinafter appear, for spacing or feeding the carriage the correct distance step by step, so asto secure accurate work. In this way skilled labor is not necessary to sharpen the saws.

Upon the inner jaw is shiftably mounted a spacing device, including in its construction the body 37, having depending studs 38, the distance between which is twoinches, and which-are adapted to be inserted in twoof the holes 39formed in the rib 15 upon the inner jaw, itbeing evident, of course, that IIO said holes 39 are also spaced two inches apart;

It will be seen that these holes are also in the extension 16, which constitutes a part of said V rib.

ably supported the plate 40, having elongated slots 41 at different points inits length, the end slot being adapted to receive the squared projection 42-upon the upper side of said body, while the screw43, also upon the upper side of said body, extends through the,

This screw is adapted to receiveother slot. a nut adapted to fit against the upper side of the plate 40, so as to hold the same in a fixed position, this being aided by the set-screw44,

. tapped into a depending lug 45 at the outer end of the plate 40. The inner endof this Upon the upper side of the body 37 is slid-- screw 44 when in its operative position-is:

.adapted to engage the adjacent face of the body 37, so as toaid the nut-of the screw 43 inholding the plate 40in a fixed position. Upon the opposite edges of the plate 40 are two rows of notches, denoted, respectively,-

by 46 and 47, the notches 47 being the outer ones or those farthest from the work table or bench to which the appliance is connected. The distance between the outer notches 47 is twice that between the teeth of the saw being operated upon, it being understood that the plate 40 is removable, so that one differently spaced can be substituted therefor as may be desired to correspond with the the saw to be operated upon. The plate 40 in practice has its upper face marked to correspond with the number of points of the saw to be sharpened-that is, a four-point saw, a five-point saw, a six-point saw, 850. The notches 46 and 47 are adapted to be alternately engaged by teeth 48, depending from the branches of the bifurcated coupling member 49, pivoted at its right end to the left arch 26 of the sliding carriage 24. At the commencement of operation the studs 38 of the body 37 having been put into the holes 39, which are at the proper distance from point of saw and at the left of the inner jaw 2, and an outer tooth 48 being in the first notch 47, it will be found that the lefthand file coincides with the space between the first two teeth of saw and the right-hand file with space just two inches farther along,

and the file-frame 28 will be moved back and forth to file two teeth, and when said teeth have been filed the coupling member will be moved sidewise, so as to carry the outer tooth 48 out of the first outer notch 47. This brings the inner tooth 48 of the coupling member into the first notch of the inner one, and the left walls in the inner notches are angular, so that as the tooth rides along the same said inclined walls serve to feed the carriage forward the required distance, the remainder of the feed movement being secured by the outer tooth 48 entering a second outer notch 47 and riding along the angular portion thereof until it is seated in said second outer notch. lVhen the carriage 24 has been fed the space of one of the outer notches, the operation will be repeated on two other teeth of the saw. The coupling member has oppositely-disposed wings 5O concaved to receive the hand of the operator, so as to provide for the necessary lateral movement of the coupling member in order to effect the feed of the carriage 24. \Vhen a space of four inches has been operated upon-two inches for each file-the carriage 24 will be wholly disconnected from the notched plate 40 and is free to be run along the jaws, so that the body 37 may be moved four inches forward, where it will fit into two other holes, whereupon the carriage 'is run back and connected, as before, and the operation of filing repeated until the two-inch space is again exhausted, and so on to the end of the saw, four inches of teeth being filed for each placing of the spacer when two files are used and six inches when three files are used. After filing the complete length of the saw every other tooth-say the right-hand teeth-- it will be necessary to go back and come up the saw again to file the left-hand teeth. To

in their respective places.

do this, take up the spacer 37 and carry it back and place itin the same two holes 39 as at first. WVe will suppose that plate 40 of the spacer was run forward on 37 as far as it would go for the first filing. New loosen setnut on top of the spacer and turn the setscrew 44 in rear of spacer until the front wall of the rectangular slot 42 in the front end of plate 40 bears hard against front face of square projection 42 on front end of body 37. The spacer is now ready for connecting, as before, with carriage in order to space the left-hand teeth; but before beginning to operate fileholder it is necessary to loosen thumb-screw 30 and take thumb-screw 32 entirely out, so that the way 27 may be swung around on its pivot 30 until it is in the right position for the file-holder to operate on the left-hand teeth, when the thumb-screws are made tight again If one of the inner slots 31 was engaged by screw 32 for first filing, one of the outer slots will now be engaged for the left-hand teeth, and so on. Now connect carriage with spacer precisely as at first filing and proceed to file and feed the carriage forward till spacer is exhausted, when body 37 will be moved four inches forward, (or six inches, as the case may be,) and so on till the heel of the saw is reached the second time, and the saw is 110w completely filed. In the case of rip-saws that are filed square across no shifting of way 27 is necessary, and every teeth may be filed as you go; but a five-point saw will require a nine-point spacer. In a nine-point saw, as it has eight teeth to the inch, it is obvious that in a section of two inches there will be eight right hand teeth and eight left-hand teeth and that a spacer suitable for this saw must have eight notches, as the one shown in Plate 40. hen these notches are exhausted, each file willhave sharpened eight teeth (right or left) and all of the teeth to be sharpened in its section, so that nothing will be left undone between the files or between the section completed by the files in one position of the body 37 and the section begun in the next position of the body 37 after being removed. This is only possible for all saws where more than one file is used and when the points of contact of files with the saw are just two inches apart.

One of the salient features of the device is the two-inch spacing hereinbefore described, which is not a matter of choice. The distance from working edge to working edge of the files must be two inches or the multiple of two inches in order to preserve the established number of teeth to the inch. For example, in a ten-point saw-that is, in a saw with nine teeth to the inch-it is not possible to use a file frame or stock with the files one inch apart, for the obvious reason that the first file would be filing a right-hand tooth, while the second file would be filing a left hand tooth, or vice versa, and conseqently would be giving them both the same angle, whereas their angles should be oppositely inclined to a longitudinal line formed by the saw edge. This would not apply to saws filed straight across or at right angles to their blades, as in the case of rip-saws, but does apply to all other saws. The principle upon which files are spaced in the file frameor stock is this: The points of contact with the saw which they are filing must be two inches I apart; but this does not mean that the files themselves are two inches apart except inthe case of straight-across filing.

It willbe remembered that the way which supports the file frame or stock is adjustable, so that it can be set at anangle less than a right angle to the saw, and it willbe remembered that one of the files is adjustable, so that it can be moved toward its companion, so that the points of contact at the requisite two inches apart can be secured.- In other words, when filing straight across the sawthat is,

. atively placed as they are intended to file it.

The improved machine will file a saw with absolute uniformity of teeth and in any manner desired and in a fraction of the time required to do this byhand in the old way. With it a saw can very readily be made coarser or fin er, as may be desired. A saw can be accurately filed in a poor light as well as in a good one and by unskilled labor. After the teeth of a saw have been filed the same are set while held between the jaws 2 and 3, and in a contemporaneouslypending application, Serial No. 123,017, filed September 11, 1902, I have shown and described an effective implement for doing this.

Instead of mounting the notched plate 40 slidably upon the body 37 I may have the same stationary; In this case the inner notches will be used for spacing right-hand teeth of the saw and the outer notches for spacing left-hand teeth, or vice versa. While the notched plateis stationary it will be removable, so as to provide for operating upon different-point saws. This modified type of plate operates in connection with the coupling member 49 precisely like the notched plate hereinbefore described.

The invention is not limited to the precise construction hereinbefore described,formany variations may be adopted within the scope of my claims.

Having described my invention," what I claim is- 1. In asaW-filing'machine, jaws for holding a saw, means for holding the jaws in engagement with said saw, a carriage slidable upon said jaws, a body mounted on a jaw and havof said stops fromtheir bores.

ing a notched spacing portion, a file-frame,

said body being bodily shiftable along the jaw carrying the same from end to end thereof as the carriage advances, and means for holding the said body in its several shifted positions,

a way for the file-frame'on said carriage, and

a coupling member united to said carriage and having teeth to engagethe said notched portion.

2. In a saw-filing machine, jaws for holding a' saw, means for holding the jaws in engagement with the said saw, a carriage slidable upon said jaws, a body shiftably mounted on a jaw and having a plate provided with notches in its opposite sides, said notches having inclined walls, a file-frame, a way for the file-frame on said carriage, and a coupling member united to said carriage and having a bifurcated portion provided with teeth, said coupling member being mounted to move'in a direction crosswise of the jaws, whereby said teeth are adapted to alternately engage the notches of said plate.

3. In a saw-filing machine, jaws for holding a saw, means for holding the jaws in engagement with said saw, a carriage'slidable upon said jaw, a body mounted 011 the jaw and having a notched spacing portion, said body be-f ing bodily shiftable upon the jaw carrying the same from one end to the other thereof, means for holding the body in its several shifted positions, a file-frame, a way for'the file-frame on said carriage, a coupling member united to said carriage and having teeth to engage the said notched portion, and a stop also carried by a jaw and adapted to be engaged by one end of the saw to thereby hold said saw against longitudinal movement, when being adjusted.

at. In a saw-filing machine, jaws for holding Y a saw, means for holding the jaws in engage- "ment with said saw, a carriage slidable upon said jaws, a body mounted on a jaw and haying notched spacing portion, said body being bodily shiftable upon the jaw carrying the same from one end to the other thereof, means for holding the body in its several shifted positions, a file-frame, away for the file-frame on said carriage, a coupling member united to said carriage and having teeth to engage said notched portion, and a plurality of stops mounted in transversabores' in one of the jaws and adapted to be moved across the space between said jaws when the same are opened one stop being adapted to be engaged by an end of the saw and thereby preventing longitudinal movement thereof, while being adjusted. p

5. In a saw-filing machine, spring-actuated jaws for holding a saw, one of the jaws hav* in g a plurality of transverse bores, stops slid able in said bores and across'the spaces be tween' said jaws when they are open, and projections upon the jaw carrying said stops, adapted to be engaged by the outer-ends of the latter to thereby prevent the withdrawal 6. In a saw-filing machine, jaws for holding a saw, means for holding the jaws in en gage ment with said saw, a carriage slidable upon said jaws, a body mounted on a jaw and shiftable along the same step by step an even number of inches, having means cooperative with the carriage for effecting the step-bystep movement of said carriage, and a plurality of stops carried by a jaw and separated a distance equaling the even number of inches which said body is shiftable.

7. In a saw-filing machine, jaws for holding a saw, means for holding the jaws in engagement with said saw, a carriage slidable upon said jaws and having perforations, a file frame, a way for the file-frame upon which the same is slidably mounted, said way having a projection at one side, a set-screw adapted to fit in a perforation in said projection and in one of the perforations of the carriage, and a segmental extension upon one side, and substantially centrally of, the way having a series of perforations arranged on an are, adapted to receive a setscrew.

8. In a saw 'filing machine, means for holding the jaws in engagement with said saw, a carriage slidable upon said jaws, a body having a notched spacing portion and provided with depending studs two inches apart and one of the jaws having a series of holes two inches apart two of which are adapted to receive said studs, and the distance between said studs and holes and the length of the notched portion always being two inches, a file-frame, a way for the file-frame on said carriage, and a coupling member united to said carriage and having a tooth to engage said notched portion.

9. Inasaw-filing machine, j aws for holding a saw, means for holding the jaws in engagement with said saw, a carriage slidable upon said jaws, a body mounted on the jaw and having a notched spacing portion, said body being bodily shiftable on the jaw carrying the same from one end to the other, means for holding the body in its several shifted positions, a fi1e-frame, a way for the file-frame mounted for turning movement on said carriage, and a coupling member united to said carriage and having atooth to engage said notched portion.

10. In a saw-filing machine, jaws for holding a saw, means for holding the jaws in e11- gagement with said saw, a carriage movably mounted on said jaws, a file-frame, a way for the file-frame on said carriage, and spacing means for insuring the movement of said carriage an even number of inches, and bodily shiftable from one end of the jaw to the other end thereof. I

11. In a saw-filing machine, jaws for holding a saw, means for holding the jaws in ongagement with said saw, a carriage movably mounted on said jaws, a file-frame, a way for the file-frame mounted for angular adjust- 111 out on said carriage, and spacing means for insuring the movement of said carriage an even number of inches, and bodily shiftable from one end of the jaw to the other end thereof.

12. In a saw-filing machine, jaws for holding a saw, means for holding the jaws in engagement with said saw, a carriage movably mounted on the jaws, a ile-fra me having files, a way for the file-frame on said carriage, means for holding the files with their working portions an even number of inches apart, and means for feeding the carriage a distance equaling said number of inches.

.13. In a saw-filing machine, jaws for holding a saw, means for holding the jaws in engagement with the said saw, a carriage slidable upon said jaws, a body shiftably mounted on a jaw and having an adjustable plate provided with notches in its opposite sides, said notches having inclined Walls, a file frame, a way for the file-frame on said earriage, and a coupling member united to said carriage and having a bifurcated portion provided with teeth adapted to alternately engage the notches of said plate.

14. In a saw'filing machine,a file-frame 11 aving a plurality of carriers mounted for adj ustment toward and from each other, and each carrier having a file-receiving groove, the side walls of which are inclined and converge downwardly, and means for forcing the side faces of the files solidly against said inclined faces.

15. In a saw-filing machine, a file-framehaving a plurality of carriers mounted for adj ustment toward and from each other, and each carrier having a file-receiving groove, the side walls of which are inclined and converge downwardly, and screws upon the carriers for forcing the side faces of the files against the said inclined faces.

16. In a saw-filing machine, jaws for holding a saw, one of the jaws having a perforation, and the other jaw having an elongated slot the outer wall of which is cam-shaped.

17. In a saw-filing machine, jaws for holding a saw, one jaw having a plurality of depending rigid arms provided with rigid outwardly-extendin g lugs, and the other j aw having depending springs connected to said in In testimony whereof I have hereunto set my hand in presence of two subseribin g witnesses.

JOHN 1). SMITH.

lVitnesses:

J. M. TERRY, GHAs. '1. LANE.

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