US1565675A - Machine for setting and filing saws - Google Patents

Description

Dec. 15, 1925- E. L.-ROOT MACHINE FOR SETTING AND FILING SAWS Filed Nov. 28. 1922 7 Sheets-Sheet 1 gnuenidz Dec. 15,1925. 6 1,565,675

E. L. ROOT MACHINE FOR SETTING AND FILING SAWS Filed Nov. 28. 1922 '7 Sheets-Sheet 2 3 111mm fox Dec. 15, 1925. 1,565,675

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Dec. 15, 1925. 1,565,675

E. L. ROOT MACHINE FOR SETTING Ami FILING SAWS Filed NOV. 28, 1922 7 Sheets-Sheet 4 5% l Ir], .!-%lwi +-1 r s 5 Q 5 Dec. 15 1925- 12565575 E. L. ROOT MACHINE FOR SETTING AND FILING SAWS Filed Nov. 28, 1922 v Sheets-Sheet 5 jwuuatoz Dec. 15, 1925. 1,565,675

E. L. ROOT MACHINE FOR SETTING AND FILING SAWS Filed Nov. 28. 1922 '7 Sheets-Sheet s l a; I//Hil {/44 W13 4 V wuentoz ZZZJZ Z Dec. 15, 1925.

E. L. ROOT MACHINE FOR SETTING AND FILING SAWS Filed Nov. 28. 1922 '7 SheetsSheet 7 3] vwenboz,

ZLZJZMZ Patented Dec. 15, 1925.

UNITED STATES EDGAR L. ROOT. OF DEFIANCE, OHIO.

MACHINE FOR SETTING AND FILING SAWS.

Application filed November 28, 1922. Serial No. 603,785.

To all whom it may concern:

Be it known that I, EDGAR L. R001, a citizen of the United States, residing at Defiance, in the county of Defiance and State ofOhio, have invented a new and useful Machine for Setting and Filing Saws, of which the following is a specification.

This invention relates to a machine for setting and filing band saws, one of the objects of the invention being to provide a compact and eflicient machine of this character which can be operated either by hand or by power and which has novel mechanism whereby the teeth can be filed in the direction of the set, thus producing more efficient results than are possible where the filing is against the set of the teeth.

Another object is to provide toothed filing mechanism and toothed setting mechanism operating in properly timed relation whereby during each revolution of the drive shaft of the machine two teeth will be set in opposite directions respectively and two 7 teeth will be filed in opposite directions respectively.

A further object is to provide a machine of this character utilizing separate files adapted to be shifted automatically into and out of operative relation with the saw so as to act successively upon the saw.

Another object is to provide efficient means operating in timed relation with the setting and filing mechanism for feeding the saw through the machine Another object is to provide simple means for holding the saw while it is being set and filed and for releasing it at the proper time to permit it to be shifted to another position.

\Vith the foregoing and other objects in view which will appear as the, description proceeds, the invention resides in the com bination and arrangement of parts and in the details of construction hereinafter de scribed and claimed, it being understood that, within the scope of what is claimed, changes in the precise embodiment of the invention shown can be made without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings Figure .1. is a plan view of the machine.

Figure 2 is a bottom plan view thereof.

Figure 3 is a section on line 33, Figure 1.

Figure 1- is an enlarged section through the filing mechanism taken on the line k-l, Figure 1, and showing a portion of the saw in elevation and engaged by said mechanism.

Figure 5 is a section on line 5-5, Figure 1, the bottom roller being shown in elevation.

Figure 6 is a plan view of the outer end portion of the filing mechanism, the adjustable guide being broken away.

Figure 7 is an elevation of the outerend of said filing mechanism, the adjustable guide being in section.

Figure 8 is a plan view of a portion of the machine, showing a modified means for mounting and shifting the files.

Figure 9 is a section through the machine on line 99 Figure 8.

Figure 10 is a section on line 10-10 Figure 8.

Figure 11 is a section on line 1111 Figure 8.

- Figure 12 is a section on line 12-12 Figure 8.

Referring to the figures by characters of reference 1 designates the main body of the machine the top 2 of which forms a table and journaled within this body is the main drive shaft 3 which can be operated by any suitable power and has a gear 4 adapted to transmit motion through a gear 5 to an upwardly extending shaft 6 to the upper end of which is secured a crank arm 7 adapted to Work close to the top 2 of the table and carrying a roller 8. Upstanding from the top of the table is a stationary jaw 9 and a bracket 10 is also extended upwardly from the table and has a bolt 11 extending therethrough and terminating in a ball 12. This ball constitutes the fulcrum of a movable jaw 13 disposed oppositely to the aw 9 and provided with a backwardly extending arm 14. The back end of this arm is pivotally engaged by one end of a rod 15, this rod being provided near said end, with pins 16 extending laterally therefrom and bearing against a fork 17 projecting upwardly from a rock shaft 18. This rock shaft is journaled in suitable bearings 19 on the table 2. A collar 20 is provided on the rod 15 and receives'the thrust from a coiled spring 21 extending around the rod. This spring bears against a nut 22 adjustably mounted on a tubular stem 23 arranged in an car 24 on the table 2 and one end of the rod is preferably reduced in diameter and is slid able within this stem. Obviously by adjusting the nut on the stem 23 the compression of the spring 21 can be regulated.

The stationary jaw 9 is provided at the upper end of its front edge with a forwardly projecting anvil and another anvil 26 projects forwardly from the movable jaw 13 with its upper edge substantially in horizontal alignment with the lower edge of the anvil 25. The working faces of these anvils are so pitched that when a saw tooth is han'imered against it, the tooth will be given the proper set. As the anvils are oppositely dis posed, a tooth hammered against one of them will be set to one side of a sa while a tooth hammered against the other anvil will be set to the other side. The movable jaw as well as the stationary jaw has projecting gripping faces 27 so that when a saw S is placed between these jaws it will be firmly gripped by the faces 27.

A gauge in the form of a forked head 28 is slidably mounted between the two jaws and the gripping faces 27 of the jaws are adapted to extend between the lingers 9.9 of this forked head. he lower portion of the head or gauge is slidable within a slot 30 formed in the table top *3 and an adjusting screw 31 which is mounted in one of the bearings 13) engages this gauge so that by rotating the screw the gauge can be shifted forwardly or lmckwardly relative to the jaws f) and 13, thus to constitute a proper backing for the saw. By moving the gauge backward or forward saws S of different sizes can be properly backed between the jaws.

Spring 21, by thrusting against collar 20, causes the jaw 13 normally to grip or press upon the saw shirt at proper times during the operation of the mechanism the forked arm 1'4 will be swung to place the spring 21 under increased compression and shift jaw 13 so as to release the saw. This movement of jaw 13 is set up by an arm 32 secured to and extending downwardly from the shaft 18 and carrying an antifriction roller 33 at its lower end. Said roller bears upon a cam face 3lprovided at one side of a disk 35 secured to the drive shaft 3. The cam faces are preferably located at diametrically opposed points so that. twice during each complete rotation of shaft 3 and disk 35 the lever 3:2 will be swung laterally against the action of spring 21 so as to disengage jaw 13 from saw S.

A bracket 36 extends upwardly from the stationary jaw 9 and pivotally mounted thereon is a lever 37 having a ratchet finger .38 pivotally connected thereto. A spring 39 connects the upper end of the ratchet finger to the forward end of lever 37 and serves to hold the lower end of the ratchet linger normally pressed against the toothed edge of the saw S. A spring 40 is secured to the table top 2 and is adjustably attached to the back end portion of lever 87. The back end portion of this lever bears downwardly on and pivotally engages a pin ll adjnstably mounted on arod 42 and said rod extends downwardly and is pivotally attached to one end of a lever 43. The other end of the lever is fulcrumed, as at 4A, within the body 1 and this lever has a stud 45 hearing downwardly on the periphery of the disk Said disk has diametrically opposed cam projections l6 so that twice dur ing each complete rotation of disk 35 the lever 4:3 will be pressed upwardly against the action of the spring 40 and cause a downward movement of the ratchet linger 3S sufficient to move the saw S downwardly a distance equal to one tooth. The parts are so timed that this downward movement of the saw will take place during the momentary interval while jaw 13 is disengaged from the saw.

Formed on the table top 2 with the shaft 18 and an arm 14 etxending between them are bosses l? in each of which is journaled a shaft -18. Arms d9 are secured to these shafts and connected to the free end of one of the arms is an arcuate hammer while another arcuate hammer 51 is connected to the other arm ft). The two hammers are curved toward each other and are so propor-- tioned and mounted that hammer 51 will move toward the anvil 25 while hammer so will move toward the anvil 26. Each shaft 48 has a crank arm 52 secured to the lower end thereof and each of these crank arms is connected by a link 53 to the intermediate portion of an actuating lever Each ]e ver is fulcrumed at one end, as shown at 55 while its other end carries an antifriction roller One of these rollers 56 bears against a cam face 57 on one side of the disk 35 while the other roller 56 bears againsta cam face 58 on a disk 5.) secured to and rotating with the shaft 23. The cam faces 5)? and 58 are oppositely disposed so that the levers o-l; will be actuated successive ly by the respective cam faces. Spring (it), shown in Figure 2. connects the two levers 5st so as to press them against the cam faces 58 and 557. Each of these cam faces terminates in an abrupt shoulder (51 so that after a roller 56 has been forced laterally a certain distance by the cam face 57 or 58. this movement placing the spring (50 under increased tension, the said spring will abruptly snap the roller past the shoulder 61. Ohviously the foregoing action will result in the arms 4:9 being swung laterally and then released so as to snap inwardly toward the anvils. The two arms will be operated alternately, the hammer being gradually swung laterally and then snapping inwardly toward anvil 26 after which hammer 51 is swung laterally and then abruptly snapped inwardly toward anvil 25. The parts are so timed that the action of one hammer will described and moves the saw a distance of' one tooth after which it is gripped and a tooth set in the manner described. Should it be desired to render the hammers inactive, it becomes necessary merely to disconnect the spring from one or both of the levers 54. This can be done by reaching through one or more openings 62 formed in the body 1.

For the purpose of filing or sharpening the teeth of the saw there is provided a supplemental table 63 hingedly connected to the table 2 as shown at 64 and adapted to swing to position either parallel with the front of the table 2 or at right angles there to. lVhen the table 63 is parallel with the table 2 it can be fastened by means of a pivoted bolt 65 engaging an car 66 extending from table 63 as shown particularly in Figure 2.

Table 63 has a longitudinal guideway 67 in which a carriage 68 is mounted to slide. This carriage has a orosshead 69 extending backwardly from one end thereof and engaged by the roller 8 so that when shaft (5 is rotated the carriage will be reciprocated in the groove 67.

Extending forwardly from the middle portion. of the carriage 68 is an inclined guide arm 70 having an upstanding rib 71 projecting through a slot 72 formed in the elongated head 73 of a file holder. This file holder is provided at its ends with ears 7;!- in which are secured the end portions of a tile 75 preferably triangular as shown in Figure l and adjustable about its longitudinal axis so as to be held at the proper angle relative to the teeth to be sharpened. The lilo can be secured in position by any suit-- able means. A stud 76'is extended upwardly from an arm 77 extending from the head 73 and slidable on the guide 7 O and mounted on this stud is a roller 78. The arm 77 has side flanges 79 which move along the sides of the guide 70, these flanges being connected by a cross member 80 slidable along the bottom of the guide 70 and carry ing a. roller 81. A pivot post 82 projects up wardly from the front end of one of the flanges 79 and an car 83 extends inwardly or laterally from said post and carries a stop screw 84 adapted to bear against the front end of theguide 7.0 so as to limit the movement of the arm 77 toward the saw S.

An arm 85 is slidable upon the arm 77 and between the flanges 79 and is provided at its back end with a head 86 overlying the head 73 and having cars 87 near its ends for holding a file 88. This file is similar to the file 75 and can be heldsecurely and adjustably by any suitable means. A slot 89 is formed longitudinally within the arm 85 and projects into the head 86, there being a guide block 90 secured on the rib 71 and supported in the slot 89 for the purpose of guiding arm 85 in its movement. A pin 91' is extended upwardly from the block 90 and is connected by a spring 92 to a rod 93 pivotally and adjnstably connected in any suitable manner to the middle portion of an equalizing link 9st pivotally mounted on the post 82. This link is also pivotally mounted on a post 95 upstanding from the forward end of the runner 85. An ear 96 is extended laterally from this end of the arm 85 and under the post and has a stop screw 97 extending therethrough for engaging the end ofthe guide 70.

It will be obvious that the spring 92 by pulling on the equalizing link 9st serves to hold both of the screws 84 and 97 norn'ially pressed against the end of guide 70. For the purpose of holding the arms 85 and 77 against relative upward movement at their outer ends an angular guide bracket 98 overha igs arm 85 and is adjust-ably connected to the bottom of guide 70, said bracket being formed with a longitudinal slot 99 through which a clamping screw 100 extends.

' The side walls of the slot 89 are enlarged as at 101 and these enlarged portions are formed with slots 102 for the reception of a.

slidable shifting plate 103. Said plate has a. longitudinally extending cam slot 10l the intermediate portion of which is obliquely disposed as shown particularly in Figure 1. The roller 78 is mounted in this slot.

Adjustably mounted on the table 63 at the front edge thereof are stop brackets 105, the shifting plate 103 being achtpted to work between them. Adjustably secured to the table 63 between and close to the brackets 105 are stationary cams 106 and these are arranged in the path of the roller 81.

As has already been explained the carriage 68 is adapted to be reciprocated and as the filing mechanism is supported on thecarriage, it will likewise be 16ClP10CLtOCl. \Vhen the slide 103 comes against one of the stops 105 it will be held against further movement during the remainderof the movement of the carriage toward said stop. Assuming that the carriage is moving to the right in Figure l the stopping of the slide 103 will result in said slide being shifted toward the posts 83 and 95, this movement being due to the fact that the roller 7 8 is and its head 73 ly timed relation.

stationary at this time. As the slide 103 is mounted in the slotted sides of the arm said arm will likewise be moved to the front and post will swing link 94 about post 82 with the result that spring 92 will be placed under increased tension. After the slide 103 has been entirely shifted in this manner the roller 78 becomes seated in one end of the slot 10% and the parts are thus held in the positions to which they have been shifted. lVhile this shifting of the arm 85 is taking place the roller 81 is being pressed forwardly by the adjacent stationary cam 106 with the result that both the arm 77 and the arm 85 are thrust forwardly and both of the files 75 and 88 are out of contact with the saw S. The mechanism is timed that during this interval the saw S is shifted by the mechanism heretofore described. As soon as the carriage 68 is moved toward the left in Figure 1 the roller 81 moves off of the cam 106 and the spring 92 promptly shifts the arms 77 and toward the saw. As the lower tile 75 is pro jecting beyond the upper file 88 and toward the saw S this lower file alone will engage and sharpen a tooth but as soon as the carriage approaches the limit of its movementtoward the left in Figure 1 roller 81 will ride on the other stationary cam 106 to disengage the files from the saw and at the same time slide 108 will be stopped and the roller 78 brought to position in the other end of slot 104;. This action will result in a. portion of the slide wedging between the head 86 and the roller 78 with the result that said roller and the arm 77 will be pushed forwardly away from the saw while the file 88 will be forced by the spring 92 into engagement with the saw S. Thus when the carriage moves to the right the upper file will sharpen a tooth.

It will be noted that by connecting the spring 92 to the arms by means of the equalizing link 94 the one spring can be used for applying the proper pressure to the saw from both files. For the purpose of adjusting the files relative to each other screws 107 are adjust-ably mounted in the head 86 and are adapted to bear on the head 73. By means of these screws the head 86 can be raised or lowered relative to head 73.

The machine thus far described is known as a left hand machine. Should it be desired to convert it into a right hand machine it would be necessary to reverse certain of the parts so that when the shaft 3 is driven in a clockwise direction in Figure 3 instead of in the opposite direction as shown by the arrow in said figure the various parts of the mechanism will be operated in proper- Such a change of construction is so obvious that it is not deemed necessary to describe and illustrate it in detail,

In Figures 8 to 12 inclusive a modified ieans for supporting and operating the files has been shown. In these figures a supplemental table 108 corresponding with the table 63 constitutes a support for a carriage 109 mounted to slide in a guide way 110. An inclined guide arm 111 is extended from the carriage and its side portions are adapted to be engaged by ribs 112 extending downwardly from a bed plate 113 resting on the arm 111. Extending from the inner edge of this bed plate are ears lll in which are journaled bearing pins 115 extending from the ends of a tilt-able bar 116. This bar is provided at one end with a depending eye 117 above which is located a split sleeve 118 adapted to be contracted by a belt 119. At the other ene of the bar 116 is provided an upstanding eye 120 corresponding with the eye 117 below which is located a split sleeve 121 adapted to be contracted by a bolt 122 extending upwardly through the bar. Thus the point of one file, indicated at 123 can be inserted into the depending eye 117 while the shank portion of the file can be clamped within the split sleeve 121. Another file 124: can be placed with its point in the upstanding eye 120 while its shank can be clamped within the split sleeve 118. Therefore, as shown in Figure 10, and also as shown in Figure 11, the two files will be supported one above the other in parallel relation.

For the purpose of limiting the tilting movement of the bar 116, a finger 125 is extended from the bar and works under a stop bracket 126 projecting from the bed plate 113. A stop screw 127 projects through the. bracket 126 and another stop screw 128 engages the bed plate. Finger 125 will work between the two stop screws and will be limited in its movement thereby, it being understood that adjustment of the screws will control the degree of movement of the finger and ofthe bar 116 from which it extends.

The parts are so proportioned that when the bar is tilted to one limit of its movement file 123 is brought to active position and when the bar is tilted to the other limit of its movement file 121 is brought to active position.

An car 129 is extended from the bed plate 113 and is adjustably engaged by a bolt 130 extending from one end of a spring 131. This spring is secured to a post 132 extending upwardly from arm 111 and through a. longitudinal slot 133 formed in the bed plate 113. Thus the bed plate is normally pulled toward the saw S so as to hold the properly placed file in engagement with one of the teeth of the saw. 1

Upstanding from the bar 116 is an car 13% to which is pivotally connected one end of a longitudinally slotted bar 135 through which the post 132 extends. A block 136 is pivotally mounted upon the bottom face of the bar 135 and is adapted towork within a fork 137 formed at one end of a bell crank 138 fulcrun'ied, as at 139, on the bed plate 113. The other end of the bell crank is pivotally connected, as at 140, to a link 141 mounted to slide and swing within an car 142 upstanding from the bed plate 113. A coiled spring 143 is mounted on link 141 and bears at one end against ear 1.42 while its other end bears against the pivot end portion of link 141. Thus the link and the engaged arm of the bell crank 138 will be held normally out of alinement. For example, and as shown in Figure 8, the thrust of spring 148 will hold the forked end of hell crank 138 swung toward ear 129 with the bar 116 tilted upwardly as shown in Figure 10. The parts will keep this position until pivot 140 is moved past its dead center whereupon the thrust of the spring 143 will hold bar 116 tilted downwardly with the files shifted to bring the upper file 124 into saw engaging position. A shifting bar'144 is slidably mounted on the bed plate within a guide 145 and is pivotally connected at 146 to bell crank 13S. Thus when the carriage 109 with the bed plate thereon is brought to one limit of its movement the bar 144 will be shifted longitudinally in one direction to move the bell crank to one extreme position. When the carriage reaches the other limit of its movement the actuation of the parts will be reversed and the bell crank will be moved to the other limit.

Each time this bar is shifted the bar 116 will be tilted and one or the other of the files will be brought to active position.

It is to be understood that the saw S will be fed longitudinally intermittently as here tofore explained and during a pause in the movement of the saw one file will be drawn to the right to sharpen one tooth. The saw will then be moved downwardly a distance of one tooth and the other file will be brought to position and moved to the left to sharpen the next tooth, during the next pause in the movement of the saw.

The means employed for feeding the saw can be the same as heretofore described or, if preferred, the lever 147, which corresponds with the lever 37 can have pivoted on it a main pawl 148 and a secondary pawl 149 can be pivotally mounted on the upper end of pawl 148. Thus spring 50, by pulling on pawl 149, will hold both pawls in engagement with the saw and should a tooth be broken off of the saw the proper actuation of the saw would nevertheless be insured because if one pawl should miss a tooth the other pawl would engage another tooth.

Lever 147 can be operated by a lifting rod 151 operated by a lever 152 mounted as shown in Figure 9 and adapted to be actuated in properly timed relation by cam projections 153 on a disk 154 corresponding with the disk 35. In other respects than thosedescribed the modified form of machine corresponds with that hereiubefore referred to.

What is claimed is:.

1. The combination with saw gripping means, of a carriage mounted for reciprocation, a guide extending therefrom, separate heads slidably mounted relative to the guide, sharpening files carried by the respective heads, arms extending from the respective heads, an equalizing link pivot ally mounted on the arms, yielding means engaging the link for holding the arms normally pressed toward the saw, adjustable means for limiting the movement of said arms toward the saw, a slide shiftable with one of the heads and movable bodily relative to both heads, means operated by the movement of the slide in one direction relative to the head for withdrawing one of the files from the saw, means operated by the movement of the slide in the opposite direction for withdrawing the other file from the saw, and stationary means in the path of the slide for producing relative movement of the slide and heads during the completion of the respective movements of the carriage.

2. The combination with saw gripping means and means for feeding the saw intermittently in the direction of its lengtlnof a carriage mounted for reciprocation, superposed holders movable with the carriage, a file carried by each holder, a spring, an equalizing connection between the spring and both holders for pressing both files normally toward the saw, means for moving the carriage between movements of the saw, means controlled by the movement of the carriage for bodily shifting the files out of engagement with the saw during the movement of the saw, and means for successively retracting the files from engaging with the saw upon completion of the respective movements of the carriage.

3. The combination with saw gripping means and means for intermittently feeding the saw longitudinally, of a carriage mounted for reciprocation, superposed plates movable with the carriage, a file carried by each plate, means for bodily shifting the plates and files away from the saw during the feeding of the saw and during the completion of each movement of the carriage, and means controlled by the 1novement of the carriage for successively retracting the files from engagement with'the saw during the respective movements of the carriage.

4. The combination with means for feeding a saw intern'iittently in the direction of its length, of a carriage mounted for reciprocation, means movably mounted on thecarriage for supporting spaced files in parallel relation, yielding means for holding either of the files in position for engagement with the saw during the movement of the carriage, and means operated by the movement of the carriage to either extreme position for shifting the files against the action of the yielding means to bring the other file to saw engaging position.

In testimony that I claim the foregoing 0 as my own, I have hereto afiixed my signature.

EDGAR L. ROOT.

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