US686184A - Saw-filing machine. - Google Patents

Description

No. 686,l84.' Patented Nov; 5, I90l.

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SAW nuns mAcmna.

(Application filed Ina. a, 1901.)

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A TTOHNEYS' No. 686,l84.

(No Model.)

WITNESSES I III II II Patented Nov. 5, I901.

C. YOUNG.

SAW FILINGMAGHINE. m

(Application filed Jan. 3, 1901.) V

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No. 686,i84. Patented Nov. 5, I90].

6. YOUNG.

SAW FILING MACHINE.

(Application filed Jan. 3, 1901.)

(No Model.) 5 Sheets-Shea! 4.

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No. 686,l84. Patented Nov. 5, I90I.

'c. voum. SAW FILING MACHINE.

(Application filed Jan. 8, 1901.)

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TATES QUITE CHARLES YOUNG, OF YORK, MAINE.

SAW-FILING MACHINE.

SPECIFICATION forming part of Letters Patent No. 686,184, dated. November 5, 1901.

Application filed January 3, 1901. Serial No. 42,003. (No model.)

To all whomit may concern Be it known that I, CHARLES YOUNG, a citizen of the United States, and a resident of York, in the county of York and State of Maine, have invented a new and. Improved Filing-Machine, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved filing-machine more es pecially designed for filing band-saws and other saws and which is simple anddurable in construction, very effective in operation, and arranged to automatically clamp the saw securely in place during the filing operation, the file moving back from the cutting-point of the tooth at the end of the filing stroke, to leave an accurately-filed tooth, and to permit of feeding the saw forward during the return stroke of the file, the latter receiving sufficient jar to dislodge the filings, and thus leave the file in proper shape for accurate working.

The invention consists of novel features and parts and combinations of the same, as will be fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings,

forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a plan view of theimprovement. Fig. 2 is a sideelevation of the same. Fig. 3 is a sectional side elevation of the same on the line 3 3 in Fig. 1. Fig.4. is a rear sec tional side elevation of the same on the line t 4 in Fig. 1. Fig. 5 is an end elevation of the improvement. Fig. 6 is a cross-section of the same on the line 6 6 in Fig. 1.

On a suitably-constructed bed A is journaled a transversely-extending shaft B, carrying at the outer end fast and loose pulleys B, connected by a belt with other machinery for imparting a rotary motion to said shaft B. On the inner end of the shaft B is secured a crank-arm B connected by a pitman O with a carriage or cross-head D, mounted to slide longitudinally on suitable guideways E, secured to or formed on the bed-plate. The rear end of the carriage D is connected by a universal joint F with a file-holder G,'carrying a file H for sharpening the teeth on the saw H extending between the fixed jaw I and the movable jaw I, as illustrated in the drawings. The inner end of the file H is held in a socket G, adj ustably secured by aset-screw on the file-holder G, the forward end of which is preferably made in the shape of a square bar, as is plainly indicated in the drawings. The outer end of the file H engages a thimble G removably held in a socket G mounted to slide on the outer end of the file-holder G, said socket G being provided on its top with a notched head G engaged by a link G, connected to one end of a coil-spring G secured at its other end to the set-screw G of the socket G. By the arrangement described the spring G draws the socket G toward the fixed socket G, so that the file H is securely held in position and is prevented from turning by forming the bore of the thimble G angular, the same as the file.

On the under side of the file-holder G and somewhat in the rear of the socket G is arranged a wear-plate G adapted to engage a transversely-extending rest J, secured by a bolt J to an arm J hung on centers J sup riage D. The rest J is formed at one side with a bevel or incline J for one side edge of the wear-plate G to abut and rest against for the purpose hereinafter more fully described. The arm J is provided with a depending arm J engaged at the rear edge by a frictionroller J, mounted to turn on a stud J secured to-a pitman O. The edge of the arm J engaged by the friction-roller J is provided with an ofiset J so that the frictionroller in traveling over this offset imparts a sudden swinging movement to the arm J to drop the file-holder G and the file H suddenlyat the beginning of the forward stroke of the carriage D and pitman O, on which the friction-roller J is journaled, and to quickly raise the file-holder and file at the end of the forward stroke. The sudden movement or jerk thus given to the file dislodges the filings adhering to the file, and consequently the file is always in a cleancondition to properly file the tooth.

On the file-holder G is mounted to turn loosely a cam K, formed with a longitudinally-extending arm K, in which screws an adjusting-screw K abutting with its lower end on a collar K secured by a set-screw K ported on a bracket D, carried by the carsition.

to the file-holder. In the said cam K is held to a slide a transversely-extending rod K adapted to be secured in place in the cam by a set-screw K and on the other end of this rod K is secured one end of a spring K secured at its otherend to the carriage-D. The spring K exerts a downward and sidewise pressure on the file-holder G, so as to hold the file H in yielding contact with the tooth to be filed during the forward stroke of the carriage, the spring K also drawing the file-holder G sidewise, so as to bring the wearplate G in cont-act with the incline or bevel J of the rest J. (See Fig. 6.) When the shaft B is rotatedin the direction of the arrow a, then the crank-arm B and pitman C impart a reciprocating motion to the carriage D, file-holder G, and file H, so that the latter during the forward stroke files the sawtooth, and during the back or return stroke the file H is out of contact with the tooth and moves above the same. When the carriage D is at the beginning of its forward stroke, then the arm J is in a lowermost position, owing to the action of the frictionroller J on the depending arm J so that the wear-plate G abuts with one edge against the incline J owing to the action of the spring K By this arrangement the fileholder G is supported at one end on the universal jointF and is free to swing downward to engage the file H with the saw-tooth, the file being pressed in contact with the sawtooth by the weight of the file-holder and the pressure of' the spring K WVhen the carriage D nears the end of its stroke, the friction-roller J presses the depending arm J so as to impart an upward swinging motion to the arm J whereby the file-holder G, with its wear-plate G is caused to slide down the incline J so that the file H is first moved sidewise, and on a further upward swinging movement of the arm J the rest J engages the wear-plate and swings the same upward, thus causing the file-holder G and its file H to swing into an uppermost po- During the return stroke the fileholder and its file are held in this position, and when the carriage G nears a rear-most position then the friction-roller J moves back to the lower segmental portion of the depending arm J, and consequently the arm J swings downward, and in doing so the rest J leaves the wear-plate G and the spring K draws the side edge of the wear-plate up on the incline J until the file-holder G has again assumed its lowermost position and the file H hr s moved back into engagement with a tooth on the saw H. It is understood that when the machine is in operation and the carriage D moves forward then during the first halfstroke the pitman O swings downward and the friction-roller J 6 travels downward on the lower segmental edge of the depending arm J and when the carriage travels forward during the last half-stroke the pitman swings upward and the friction-roller J 6 travels upward on the said lower segmental edge of the arm J to finally travel up the offset J and thereby impart a sudden forward swinging motion to the depending arm J and an upward swinging motion to the arm J for the purpose mentioned. During the return stroke of the carriage the friction-roller J 6 first travels up the upper segmental edge of the depending arm J and then down again without giving movement to the arm J and the file-holder, thus holding the latter in the raised position, and when the carriage reaches the end of its return stroke and begins the next forward stroke then the friction-roller travels down the offset J to allow the arm J 'to swing into a lowermost position, which is retained during the forward stroke of the carriage. WVhen the arm J swings upward, as described, the incline J 4 forces the file-holder G and the file sidewise to move the file away from the back of the tooth filed, and when the arm J swings downward at the beginning of the next stroke the spring K draws the file-holder back to again engage the wearplate with the incline J for the file to engage the back of the next tooth and file the same. By the arrangement described the file is not liable to drag over the tooth just filed. During the forward stroke of the carriage D, the fileholder G, and file H the saw H is normally clamped between the jaws I l; but during the return stroke of the file H the jaw I is opened and a feeding mechanism now engages a tooth on the saw H, so as to shift the same transversely for the file H to engage the .next succeeding tooth during the next forward stroke of the carriage D. The movable jaw I is hung on centers 1 carried by the bed-plate A, and the said jaw is provided with an arm 1 carrying a spring I the free end of which rests on the peripheral surface of a cam 1 secured to the shaft B adjacent to the crank-arm B A set-screw l in the arm I engages the spring 1 so as to adjust the tension thereof. When the free end of the spring I leaves the high port-ion of the cam I during the rotation of the shaft B, then the said spring I and arm I swing downward to swing the jaw I into an open position, and thus release the saw H, so that the latter can now be shifted transversely by the feed mechanism. The back of the saw rests on supports L, arranged on opposite sides of the jaws I I and secured to or forming part of a U-sha'ped yoke L, pivoted at L on arms 1 projecting from the movable jaw I. The rear end of the yoke L is engaged by a set-screw L so as to move the yoke up or down and bring the supports L in proper position, according to the width of the saw under treatment, so that the sawteeth project the desired distance above the jaws I I for the file to properly file the sawteeth.

The saw-feed operates in conjunction with the movable jaw I and consists, essentially, ofa feed-pawl N, fulcrumed on an arm N,

(see Fig. 5,) pivoted at N on a rock-arm N hung on centers N carried by the bed-plate A. The arm N has an extension N engaged at the top and bottom by set-screws N screwing in the rock-arm N so as to permit of adjusting the arm N, and consequently the pawl N, to compensate for Wear of the said pawl. The rock-arm N is provided with an arm N engaging the peripheral surface of a cam N secured to the shaft B, and said. arm N is pressed on by a spring N, attached to the spring 1 previously mentioned, so that the arm N is always held in firm contact with the peripheral surface of the cam N The spring N holds the jaw of the vise against the saw when the spring I is out of contact with the cam 1 and prevents the saw from feeding too far ahead or working up out of the jaws of the vise while the saw is feeding. When the carriage D reaches the end of its forward stroke, then the spring 1 moves from the high portion of the cam 1 so that the jaw 1 opens, as previously described, at about the time the file H swings into an uppermost position. During the return stroke of the carriage the cam N imparts an upward swinging motion to the arm N so that a transverse swinging motion is given to the rock-arm N and the arm N to cause the pawl N to push the saw H transversely in the direction of the arrow b to feed the saw forward the length of a tooth, and previous to the carriage D reaching the end of its stroke the spring I is engaged by the high portion of the cam 1 so that the jaw 1 is moved into a closed position to securely clamp the saw H in position between the jaws 1 I. At the same time the arm N drops off the high portion of the cam N and swings downward, so that a return swinging motion is given to the rock-arm N and arm N to cause the pawlN to glide over a tooth of the saw back to its forward position. Thus by the arrangement described a saw-tooth is filed during the forward stroke of the carriage D by the file H, and when the carriage D nears the end of its forward stroke the file H is thrown back from the cuttingpoint of the tooth, and then the file is raised completely out of engagement with the saw, and during the return stroke of the file the saw is unclamped and fed transversely, so as to bring a succeeding tooth in proper position for the next stroke of the file, the saw being again clamped securelyin position prior to the carriage D making its next forward stroke, as previously explained. By causing the file H to leave the tooth in the manner described very accurate filing of the tooth'is possible.

By the arrangement of the sockets on the file-holder G and the spring G for drawing the socket Gr toward the other socket G, I am enabled to readily accommodate large and small files, and at the same time the files can be readily changed whenever desired.

By adjusting the tension of the spring K more or less pressure can be given to the fileholder G and the file H, so that use can be made of sharp or dull files, the pressure on the file-holder being regulated by adjusting the tension of the spring K accordingly. It is further understood that by having the universal joint F the file-holder G can readily swing downward or upward, or sidewise to bring the file H in the proper position relatively to the saw, as above described.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. A filing-machine having a reciprocating carriage, a file-holder, and a universal joint between the carriage and the file-holder, to allow the latter to swing in any direction and to move bodily with the carriage, as set forth.

2. A filing-machine having a reciprocating carriage, a file-holder, a universal joint between the carriage and the file-holder, to allow the latter to swing in any direction and to move bodily with the carriage, and an arm on the carriage for forming a rest for the fileholder, as set forth.

3. A filing-machine having a reciprocating carriage, a file-holder, a universal joint between the carriage and the file-holder, to allow the latter to swing in any direction and to move bodily with the carriage, and a movable arm on said carriage and having an incline to support said file-holder and to move the latter up or down or sidewise, as set forth.

4. A filing-machine having a reciprocating carriage, a file-holder, a universal joint between the carriage and the file-holder, to allow the latter to swing in any direction and to move bodily with the carriage, and a spring pressed arm pivoted on the carriage and having a rest supporting an incline for engagement with the file-holder, to move the latter up or down or sidewise, as set forth.

5. A filing-machine having a reciprocating carriage, a file-holder, a universal joint between the carriage and the file-holder, to al low the latter toswing in any direction and to move bodily with the carriage, a springpressed arm pivoted on the carriage and having a rest supporting an incline for engagement with the file-holder, to move the latter up or down or sidewise, a crank-arm, and a pitman connected with said carriage, the pitman being arranged to engage the said pivoted arm, as set forth.

6. A filingmachine having a reciprocating carriage, a file-holder, a universal joint between the carriage and the file-holder, to al low the latter to swing in any direction and to move bodily with the carriage, an arm pivoted on said carriage, a spring pressing said arm, a tension device for said spring, to ad= just the tension thereof, and a rest on the free end of said arm and having an inclinefor engaging the said file-holder, as set forth.

7. A filing-machine having a reciprocating carriage, a file-holder, a universal joint between the carriage and the file-holder, to allow the latter to swing in any direction and to move bodily with the carriage, an arm pivoted on said carriage, a springpressing saidi arm, a tensiondevice for said spring, to adjust the tensionthereof, a rest on the free arm, as set forth.

thereon, a socket slidable on the bar, a thimble carried by the slidable socket, and a spring connecting the sockets with each other, as set forth.

9. A filing-machine having a file-holder, comprising a bar, a socket ad-justably secured thereon, a socket slidable on the bar, a thirn ble carried by the slidable socket, and a spring connecting the sockets with each other, the spring having a loop for hooking into a hook on one of the sockets, as set forth.

10. A fiiing-machine'having a fixed jaw, a movable jaw, a yoke fulcrumed on one of the jaws and having supports for supporting a saw 1 at the time the jaws are open, and means for 8. A filing-machine having a file-holder, comprising a bar, a socket adj ustably secured j adjusting. the said yoke, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

CHARLES YOUNG. Witnesses:

ANDREW W. J UNKINS, RUTHERFORD B. H. MOULTON.

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