US553584A - Saw-filing machine - Google Patents

Description

(No Model.)

2 Shets-Sheet 1 G. R. HUPP & G..H. VERNON.

SAW FILING MACHINE.

Patented Jan. 28, 1896.

AN DREW B.GRAHAM. PNOYOUTHQWASNIN I10.

(No Model.) 7 2 Sheets-Sheet 2.

G. R. HUFF & G. H. VERNON. SAW FILING MACHINE.

N0. 553,5? 1. a Jan. 28, 1896.

. mlggg k mmm. I I Y) UNTTED STATES PATENT OEETEE.

GEORGE R. lIUFF AND GEORGE H. VERNON, OF ST. PAUL, MINNESOTA.

SAW-FILING MACHINE.

SEECIFICATION forming part of Letters Patent No. 553,584, dated January 28, 1896. Application filed April 23,1894. Serial No. 508,744. (No model.)

To Cl/ZZ whom it may concern.-

Be it known that we, GEORGE R. HU FF and GEORGE H. VERNON, citizens of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in Saw-Filing Machines, of which the following is a specification.

This invention relates to saw-filing machines; and it consists in the construction, combination and arrangement of parts, as hereinafter shown and described, and specifieally pointed out in the claims.

In the drawings, Figure 1 is a side elevation, Fig. 2 is a plan View, and Fig. 3 is a cross-sectional elevation, of the apparatus. Fig. 4: is a sectional elevation of the mechanism whereby the saw is adjusted in the clamps, and Fig. 5 is a cross-sectional view of the same. Figs. 6 and 7 are perspective views of the two main portions of the saw-adjusting mechanism detached. Fig. 8 is a bottom plan view, Fig. 9 is a sectional side elevation, Fig. 10 is a cross-sectional View, and Fig. 11 is an end elevation, of the file-holder detached. Fig. 12 is a perspective view of the main sliding frame detached. Figs. l3, 14, 15, and 16 are perspective views of the different parts comprising the gaging mechanism detached. Fig. 17 is a perspective view of a section of one of the clamp-bars, showing one of the swiveled stops for the upper or tooth edge of the saw. Fig. 18 is a perspective view of a section of one of the clamp-bars, illustrating the construction of the plate for regulating the position of the gage with relation to the first tooth when commencing the filing action. Fig. 19 is a perspective view of the gage-plate and its slide detached.

This apparatus comprises two clamp-bars between which the saw is held by a vise or other suitable means, a frame sliding along the upper edge of the clamp-bars, a holderframe or guide for a file-holder and swiveled upon the sliding frame, and a file-holder fitting into this guide or holder-frame, the swiveling of the holder-frame permitting the teeth of the saw to be filed at any desired angle.

A A represent the clamp-bars between which the saw-blade B is adapted to be held, the clamp-bars to be held in a vise of any suitable construction. Arranged to slide along I over these clamp-bars by ways a is a frame consisting of side bars D D connected at their ends by cross-bars- D D the latter arched upward to enable them to pass over the saw-teeth and provided with segments D D. These segments are formed with grooves or channels 1) to receive ribs onafile-holder frame E E the segments permitting the fileholder frame to be oscillated over the clampbars, and the ribs and channels preventing its removal exceptwhen turned around sub stantially parallel with the clamp-bars, a posit-ion it would never assume when in use. The file-holder frame will not therefore be liable to jump from the sliding frame.

The file-holder frame consists of two main side plates, formed to stand at an angle to the clampbars, as shown, and adaptedto be held in fixed relations to the segments by small lever-catches d, fitting by their lower legs into notches d in the inner faces of the segments, the notches being so placed as to enable. the file-holder frame to be adjusted to suit the different angles of the teeth of the different grades of saws. The arched crossbar D is formed with an extension D into which a standard F is pivoted, and adapted to receive a screw-rod F which is tapped through it, as shown.

F is a fiat spring-plate supported in a slot 6 around the pin of the standard F, and with one end turned upward and notched at c and fitting into a channel in the head of the screw-rod F as shown. By this arrangement the revolution of the screw-rod will cause the spring-plate to be adjusted lengthwise of the clamp-bars.

Pivoted at g to the arched cross-bar D is a lever I-l lying normally in a diagonal position across the spring-plate F and provided with a cam-rib extending downward from its free end, as shown more clearly in Fig. 14, which represents a perspective view of this lever detached. The lever H is provided with a small projection extending down alongside the rear edge of the springplate F to limit the movement of the lever in one direction, while another small projection, on the end of the cam-rib serves to limit the movement of the lever in the opposite direction. A thumb-plate is formed upon the lever to assistin its operation. The

free end of the spring-plate F is bent downward, and is formed with a notch h and leg 7L2, the notch adapted to fit down into the space between the teeth of the saw, and the longer leg adapted to act as a stop to prevent the spring-plate being turned entirely across the saw. The springplate is thus free to be turned off to one side, as shown bydotted lines at i in Fig. 2, when the segmental frame is to be moved along the clamp-bars, and then when the required position is reached the spring-plate is turned inward until the notch h fits into the bottom of one of the teeth, f, of the saw, the leg 7L2 arresting the motion of the spring-plate beyond its proper position parallel with the clamp-bars. Then the further inward movement of the lever H causes the cam-rib g to run upon top of the spring-plate and force it downward upon the saw-blade,and thus hold it with suffi cientfirmness to lock the sliding frame in position upon the clamp-bars, the lug g preventing the lever from being moved entirely across the spring-plate, as before described. The spring-plate will be loose enough around its pivotal point on the stud of the standard F to move freely when the cam-rib is off from it, as shown in Fig. 1, and this freedom of motion will permit the cam-rib to move the notched end of the spring-plate laterally toward the saw-blade without riding it or pressingit downward, but as soon as the leg 7&2 comes in contact with the side of the sawblade, and the further motion of the springplate checked, the continued lateral motion of the lever will cause the cam-rib to ride the spring-plate and lock the whole sliding frame fast to the saw-blade.

The lever H extends backward beyond its pivotal point, as shown, so as to afford a support to the shorter end of the lever, so that the strains upon the rivet g will be lessened.

Attached to the side of the standard F is a slotted plate a with one end, 71 turned inward over the upper surface of the springplate F and made adjustable upon the standard, as shown, to form a gage by which the device may be adapted to saws of different sizes of teeth, as hereinafter described.

The spring-plate will be provided with gagelines corresponding to the teeth of different grades of saws, by which the gage-plate may be set, as hereinafter described.

Attached to one of the side bars D of the sliding frame is a plate t having gage-lines upon its upper surface corresponding to the pitch or hook of the teeth of the various grades of saws, and extending inwai d to a point sufficiently near the saw to enable one of its gage-lines to be placed in line with the bottom of one of the spaces between a pair of the teeth.

The bottoms of the spaces between the teeth of saws are so nearly uniform that they are the best portion of the saw to employ as a guide in filing the teeth, and this apparatus is arranged to be so used, the notch h in the end of the spring-plate, as before described, being intended to fit down into the bottom of one of the spaces between the teeth. At suitable points on one of the clamp-bars, preferably near the ends, are two small catches 0', (one only being shown,) pivoted by their lower ends, as shown in Fig. 17, and with the upper end turned off to one side, as shown at 0- These turned-off portions are adapted to fit into the spaces between two of the saw-teeth, and form stops or guides to indicate the proper position of the saw when it is first placed in the clamp.

Attached to the same clampbar as the catches 0", preferably near the ends or in proximity to the notches, are two screw-rods M, (only one being shown,) projecting below the clamp-bars and exceeding in length the widest saw-blade which will be liable to be filed. Fitting upon each of these screw-rods is a win g-nut M with an upwardly-pro j ectin g hub M over which a sleeve M fits loosely, the sleeves each having a groove or slit 0 adapted to fit over the back edge a of the saw, as shown in Figs. 1 and hen the saw is to be placed in position, the clamp-bars are separated, the catches 7" turned upward, as in Fig. 17 and the saw placed with the turnedover ends r in the spaces between two of its teeth. The sleeves M are then pushed up against the back edge of the saw-blade with the slits c embracing the edge, and the wingnuts M screwed up, pressing the saw-blade against the catches r with suflieient firmness to support it in place until the other clampbar is placed in position, and the two clampbars with the blade between them compressed in the vise. The catches r are then pressed to one side and turned down out of the way into their recesses 0- as shown in Figs. 1 and 2, the catches being only for temporary use to support the saw-blade while being placed in the clamps and set in position in the vise.

The file-holder consists of an open frame K with handle K and fitting closely between the guides E E and with side ribs to limit its downward movement and form guide-stops to secure the uniform action of the file. Depending from the end of the frame K next to the handle K is a lug 772' into which the end m of the file K is pivoted, while the other end m is supported in a stud m journaled in a lug m depending from the outer end of the frame K, as shown. The file end m is made triangular, or of any other irregular shape, and fits into a correspondingly-shaped cavity in the stud on, so that when the stud is oscillated, the tile will be oscillated with it to change its pitch. Attached to or formed in one piece with the stud m is a lever or arm on extending upward across the outside of the end of the holder-frame, and adapted to be fixed in its position by a set-screw m', the latter tapped into the holder-frame and fitting through a curved slot m in the lever m, so that the levermay be moved laterally from side to side and thus oscillate the file by oscillating the lug which supports it. The limit of the throw of the lever m permitted by the length of the slot hi will correspond to the utmost extent of the pitch of the teeth of any grade of saw which is to be filed, and by setting the lever at the intermediate points, any required pitch may be obtained. In order to secure uniformity of the pitch a series of holes m are formed in the end of the holderframe into which a pin m in the lever m fits, the holes corresponding to the pitches of the teeth of the different grades of saws.

As before stated, the guides E E of the swiveled file-holder frame are formed with an upwardly-trending angle, so that the file in its cutting action will act upon the saw-teeth at an upward angle,th is motion insuring much better results and preventing the formation of burs upon the cutting-edges of the teeth, thus bringing the points of the teeth to a fine point, and not being so liable to cause the sawblade to vibrate.

After the sliding frame is properly set, as above noted, the spring-plate F is adjusted by the screw-rod F until its notch h, or the bent end in which the notch is formed, will fit down into the space two teeth distant from the tooth which is to be filed, toward the heel end of the saw, and locked therein by the cam-lever H. The pitch of the file is then properly set by the lever m to correspond to the pitch of the teeth of the saw or to the pitch which it is designed to give the teeth. The file-holder is'then inserted and the tooth above which the file-holder comes is filed. Then when that tooth has been filed the fileholder will be removed, the spring-plate released, and the sliding frame moved along and the spring-plate locked with its notch in the tooth-just filed, which will bring the file, when the file-holder is replaced, in position to file the second tooth therefrom, and so on, filing every other tooth throughout the length of the saw, the filed teeth being thereafter the guides or standards for insuring the integrity of the filing.

By insuring the proper position of the bottoms of the spaces above noted in starting the filing, the bottoms of all other spaces will necessarily be brought to a uniform distance apart, and if this uniformity is maintained, the cutting-edge and points of the teeth will be correspondingly uniform.

XVhen the teeth have all been filed in one direction, the clamp-bars with the saw inclosed by them is reversed in the vise, and the swiveled file-holder frame reversed in position upon the clamp-bars, and the unfiled teeth filed as the sliding frame travels again over the clamp-bars from heel to point, the spring-plate F being adjusted the distance of one tooth and set into the space of the first tooth formerly filed, the filed teeth being used as guides in the return motion, to insure uniformity.

In fine saws the first tooth filed may be at a greater distance than two teeth away from the space in which the spring-plate is locked, to avoid danger of the cutting of the springplate by the file, but the action would be substantially the same.

The gage-lines on the plate 15 and the holes m in the end of the file-holder will correspond, and will be numbered to correspond, so that the file will be adjusted to the proper pitch.

Attached to one of the side bars D is a plate T with its inner edge in close proximity to the side of the saw in the clamps and adapted to receive the filings and carry them off to one side over the edge of the clampbars and other parts, so that they do not come in contact with any of the Working parts of p the instrument.

By preventing the filings from coming in contact with the working parts all danger of wear and undue friction from that source is avoided, and the working parts may be lubricated without danger of the commingled oil and filings cutting out the working parts.

The saw-blade should be set down between the clamp-blades as far as possible, so that the chance for vibration is lessened, and in order that the inclined operating file-holder may be operated upon the teeth thus set the upper surfaces of the clamp-bars are chamfered off, as shown in Fig. 3, so that the file will not cut them.

Having thus described our invention, what we claim as new is- 1. In a saw filing machine, clamps between which the saw is adapted to be held, aframe slidable along said clamps, and provided with segmental wings, a file holder frame swiveled upon said wings and adapted to serve as a guide for afile holder, a spring plate pivotally connected to said slidable frame and with its free end adapted to fit the spaces between the teeth of the saw, and a lever havinga cam rib connected to and adapted to guide said spring plate, and compress said spring plate and lock it in position, substantially as and for the purpose set forth.

2. In a saw filing machine, clamps between which the saw is adapted to be held, a frame slidable along said clamps, and provided with segmental wings, a file holder frame swiveled upon said wings and adapted to serve as a guide for a file holder, a spring plate pivotally connected to said slidable frame and with its free end adapted to fit one of the spaces between the teeth of a saw, a lever having a cam rib connected to and adapted to compress said spring plate and lock it in position, and an adjusting screw adapted to adjust said spring plate in relation to said slidable frame and the sizes of the teeth to be filed, substantially as and for the purpose set forth.

3. In a saw filing machine, clamps between which the saw is adapted to be held, a frame slidable along said clamps and adapted to support the file holder, a gage plate projecting from said slidable frame and graduated to correspond to the required pitch of the teeth of the saw, a spring plate pivoted to said slidable frame and with its free end adapted to fit one of the spaces between the teeth of the saw, and a swiveled lever having a cam rib and adapted to compress said spring plate and lock it in position, substantially as and for the purpose set forth.

4. In a saw filing machine, two clamp bars between which the saw is adapted to be held, guide catches for the teeth pivoted in one of the clamp bars and adapted to be folded down into recesses therein when not in use, rods depending from said clamps and having sleeves adapted to inclasp the lower edge of the saw blade, and adjustable upon said rods, substantially as and for the purpose set forth.

5. In a saw filing machine, clamp bars between which the saw is adapted to be held, a frame slidable along said clamp bars and adapted to support the file holder and having a gage plate projecting from said slidable frame and graduated to correspond to the required pitch of the teeth of the saw, and a springplate adj ustably connected to said slidable frame and adapted to be locked into the spaces between the teeth of the saw, substantially as and for the purpose set forth.

6. In a saw filing machine, clamps between which the saw is adapted to be held, a frame slidable along said clamps and provided with segmental Win gs, a file holder frame swiveled upon said wings and provided with parallel guides, a file holder supported by said guides and having a depending lug on one end in which one end of the file is centered and with a socket depending from the other end, an arm having a stud fitting said socket, and in which the other end of said file is centered and held from turning therein, and means for adjusting said arm to change the pitch of the file, substantially as and for the purpose set forth.

In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.

GEORGE R. IIUFF. GEORGE II. VERNON. \Vitnesses:

(J. N. \VooDWAnn, II. A. CAMPBELL.

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