US1674853A - Saw-filing machine - Google Patents

Description

June 26, 1928.

F. E. COLLIER SAW FILING MACHINE' l Filed. March 19, 1927 ifi/f9.1

4 Sheets-Sheet 1 June 26, 1928.

F. COLLIER sAw FILING MACHINE Filed March 19, 1927 4 Sheets-Sheet FIZ 14 Patented June 26, '1928.

Nerea f` j j 1,674,853

orifice.

ERE'EMAN E. OOLLER, OE MINNEAPOLTS, MINNESOTA, AssiGNon To FOLEY' SAW TOOL COMPANY, INCORPORATED, OE NINNEAPOLrs, MINNESOTA, A CORPORATION ON MINNESOTA.

SAW-FILING MACHIIVINE.

Application filed Marca 19, 1927. seraiNo. 176,659.

My invention relates to saw tiling machines and is in the nature of an improve-- Fig. 1 is a front elevation of theA improved saw filing machine in which is mounted a hand saw for filing;

Fig. 2 is a right side elevation of the machine andA showing the saw in section; Fig. 3 is a left side elevation of the maf chine and showing the saw, in section;

F 4 is a horizontal section taken on the line 4 4 of Fig. 2;

Fig. 5 is a detail view principally in sec,y

tion taken on the irregular line 5 5 of Fig. 4;

Fig. 6 is a view principally in transverse vertical section taken on the lineV 6 6 of F 2; f o l Fig. 7 is a transverse vertical section taken on the line 7 7 of Fig. 3;

Fig. 8 is a detail view with some parts sectioned on the line 8 8 of Fig. 3, on an enlarged scale;

F 9 is a section taken on the line 9 9 of Fig. 8, on an enlarged scale; y

Fig'. 10 is a detail kview with some parts sectioned on the line 1,0 10 of Fig. 2, on an enlarged scale;

11 is a fragmentary detail view .with

some parts sectioned Onthe line 11 11 of Fig. 10,A on an enlarged scale; V Fig. 12 is a fragmentary viewijn front elevation with some parts sectioned on the line `12 12 of Fig. 2, on an enlarged scale, with certain of the parts different positions from that shown in Fig.-1;

Fig. 13 Ais a detail view .principallyin seetion taken on the line 13 13 of Fig. 12;

fragmentary detail view in*A Fig. 14 is a front elevation of the improved saw filing machine having a eircular vsaw mounted therein for tiling;

Fig. 15 is a fragmentary right side ele-y vation of the machine, as shown in Fig. 14; and f Fig. 16 is a fragmentary'detail view with some parts sectioned on the line 16 16 of Fig., 14.

To illustrate the manner in which a hand saw, bucksaw, back-saw, meat saw or the like is held in the machine and sharpened or new 'teeth cut thereon, there is illustrated. in Figs. 1, 2, 3, and 12 a hand saw a. Inv Figs. 14, 15, and 16 there is illustratedk in the machine a circle saw positioned for tiling.

4The numeral 20 indicates a yflat horizontal base 'plate belted to a bench c and having at its front edge a downturned flange vertical slot 25 is formed in said face plate below the Opening 24 and at the transversev center of said face plate. rlhe base 20 and fiange 21 are hifurcated at 26, for a purpose that will presently appear.

An: upright vice member 27 has its lower end hinged at 28 to and between a pair of hinge lugsvon a yforvvardly projecting lug 2Q o n the lower end of the face plate 22. On the upper end of the vice member 27 is an upwardly and inwardly curved jaw 30. Co-operating with the jaw 30 is a correspondingly formed fixed jaw l-integrally formedwith the face plate 22 atthe bot tom ofthe opening 24. f

f The vice member 27 is Operated to adjust the jaw 30 toward the jaw 31 or release the same and f'is, l1el.d where set by a two-part clamping boltfand co-operating nut-acting member. VSaid bolt comprises a head mem-y back 'of the face plate 22 with its head impinging ythere-against and a` tubular ineinber which extends through a vertical slot 34 `in'said vice" member coincident with ..1 the slot and. has' internal "threaded engagement with said head member. yOn the onteruendyof the bolt member y32 is a hand wheel 35jby which said bolt member may be turned on the bolt member 32. Said bolt member 32 has shouldered engagement with the face plate 22 to prevent-the sainefrom turning in the slot`25. The nut-acting. member 36 has threaded engagement with thetubular bolt member 33 and im pinges against the face of the vice mem ber/2T as a base ot resistance, and has on itsoiiitei'r end a, hand wheel 37 by which it "may be turned'. Obviously, by 'tightening the nut-acting member on thebolt member '33, the jawSO maybe adjusted toward the jaw 31.

Usually, an ordinary three-sided file Z will be" used Vto sharpen the teeth' of a. saw or cut new teeth therein vand this file is arranged to becarried andV given an endwise up and down movement by a crosshead guide vthat i base 2O. 3.0.

is mounted :tor angular adjustment in re.- spect to the saw, the 'lace plate '22, and

is inthe 'form of an upright plate 38` having at'tlie upper portion of its front end a forwardly projectingarm 39 that'is pivotally attached b y a machine screw or stud 4 0 to a lug on the upper end of the face plate 22. It is important'to note that theaXis of the stud40'is at the transverse center of they saw @and midway between .the sides of the` jawsSOand 3l. Formed with the bottom ofthe crosshea-d plate 88 are front and rear bearing lugs 41 which rest, on planed segmental surtaces 42on the base/*20 and slidably support said plate.. To hold the crosshead plate 38 where set, thesame is 'secured tojthe Vbase 20 by. means .otffront and rear nut-equipped headed bolts 43 kthat aie in- 7 serted upward through segmental slots 44 in said base and bores in the lugs 41 (see Figs. 4 and 5). `Said slots 44 are formed inthe planed surfaces V42 and on arcs of circles having their centersat the aiiisrot the studs-40. The base plate 20a'long the outer slot 44, is graduated at e .to indicate the angle at whichytho crosshead guide 38 andfhencethe tile CZ will be set; in respect to,v the saw or in respect to a position at right angles to the saw.

VRigidlyl secured tothe erosshead'guide 38V atthe upper and lower edges thereof, 'but laterally spaced therefrom, is a pairfof par-y Mounted on V allel vertical guide rods 45.

- .these rods .45" for fslight vertical .movement is a` secondary cros'shead, guide: '46; having v upper and lower' ways in which a plate-like Y crosshead mounted for horizontal slid-l The crosshead guide, as shown,

lpressedplungers 49 that arey seated in` sleeve-like portions 50 of thearm48 and are provided at their upper ends with thumb nuts 51 bymeans of which they are made verticallyV adjustable. The plungers 42, at their loweren'ds, are formed with sleeve-like headsl 521jand 53. Double-ended endwise reversible"sleeve- like sockets 54 and 55 are insertedazirially through the heads 52 Vand 53. When the thumb nuts V51 are loosened,

the plungers '49 will Vbe pressed .downwardz by their springs andV thumb screws56 are provided Y. l'or securing said plungersto the sleeve-like kportions 50 of the 'arm 481inv different adjustments.`

` The inner plunger 49 .and its head 52 arelongitudinally slitvso that when saidV plunger engaged by the respective screw 56, said head .will becontraetedonto the sleeve-like socket 54 andjsecure the same where set.v The head 53 islongitudinally slit and'rprovided withv a thumb screw''" .torrenti-acting said stud onto the socket 55 and hold the same where set. The passage through the sleeveflike socket 54 is triangular in` cross section, as .shownin 'F ig. 8, to receive vthe outer end portion of the le al. Said vpassage at the Atwo .ends of' the. sleevelike socket, is citaVv different size in cross section to hold fileset dilierent'sizes.

y The passage through, the sleeve-like socket y 55 is round and adapted to receive the shank of the tile d, and the diameter oli' said pasH sage,` at the two ends of said socket, is dit.

ferent so as Vto receive different sized Shanks.`

Obviously, the sleeve- like sockets 54 and 55 hold the 'file (l horizontally'. and by manipu lating the nuts 5l saidl .tile mayl be raised for loweredand by turning the sockets54 anc 55 in theirheads said file Vimay be trans versely angularly adjusted.' y

The numeralV 5B Aindicates `a short shaft journaled in the angularly adjustable crosshead guide plate 38 and provided at its'outer end with a spur gear 59 which meshes with a'spui' pinion `GO journaled on a stud 6l4 on said lplatte. On the hub of the pinion GO is. i. a half clutch 62 arraiiged.to vinterlock with a halfclutch 63 on the hub ol'a fly wheel. 64 journaled on the stud `61.. rllhe flywheel 64, as' shown, isprovided with a' vcrank handle' 65 by which it may be rotated by hand when;

the machine'is to' be handoperated.VV Y

"'VVhen the lmachine is to be operated byy a motor, as illustrated in Figs. 1, 2, 14 and 15,1 an electric motor 66 is lbolted to a bed plate 67 which), inl turn,.is boltedlto the topL of the cros'shead'; plate OnV the armature lsha-tt of the motor 66 is a pulley v68 over which and the iiy wheel=64 runs abelt 69 forv driving said fly wheel from 'the motor 66.

At the inner side ofthe crosshead guide plate 38, the shaft 58 is provided with a cam 7 0 and with a late rally offset crank` arm 71. The secondary crosshead guide 46 is provided with an upper bearing lug 72, the flat under surface of which rests upon the cam 70. Said secondary crosshead guide 46 is also provided with a lower bearing lug 73, the flat upper surface of which is arranged to be engaged by the cam 70 when it is low. The purpose' of this lug isto positively move the secondary .crosshead guidel 46 to its low position. The numeral 74 indicates a rollerequipped screw that is adapted to be secured to the crank arm 71 in different positions from its axis to vary the throw ofsaid arm and works in a vertical cam slot in the crosshead 47. i

With the construction described, when the shaft 58 is rotated, the crank arm 71 will cause the crosshead 47, which carries the tile d, to reciprocate horizontally and the cam 70 will cause the secondary crosshead guide 46 and hence the crosshead 47 to move vertically. The timing of said movements is such that, at the limit of the outward movement of the lile d, the high portionof thc cam 7() will come into action on the lug 72 and will lift the crosshead 47 and the iile so that the lile will be carried clear of the saw on its return movement, and when said crosshead 47 and the ile have reached approximately the limit of the return movement, the lower portion of said cam 70 will come into action on the lug 72 and will allow the'crosshead 47 and the file to dropl to low position so that the file will properly come into action on the teeth of the saw. During the movement of the crosshead 47 to low position the high part of the cam 7 O will'come into action on the lug 73 and positively move said crosshead.

The step by step feed -movement of the saw is automatically .produced by means best shown in Figs. 1, 12 and 14, andcomprises as follows: Pivoted to the face plate 22l is a pair of reversely-acting bell-cranlr-shape'd levers 76 which,` at their opposing upper ends, are provided with reversely oblique screws 77 that afford adjustable contacts andl that are engageable with a tappet plate 78 detachably secured by a screw 79 on an arm 8O that projects from thefront upper portion of the secondary crosshead guide 46'. The screws 77 are provided with lock nuts 81 that impingeagainst the levers 76 and hold said screws where set. Coil Vsprings' 82,- anchored to the face plate 22 are attached to the opposing upper ends of the levers 76, tend tot yieldingly hold said arms with the screws 77 in contact withthe tappet plate 7 8, as best shown in Fig. 12. f y

Reversely-acting driving dogs 83 (see Figs. 1, 12 and 14) are' ypivoted to thelower ends of the levers 76 and are adapted to engage the teeth of the saw. At their 'outer ends, the dogs 83 are beveled to afford flat stop surfaces 84,y and the lower arms of said levers 76 are provided with spring-pressed plungers formed with heads against which either the llat surfaces 84 of the dogs'83 or the backs thereof are arranged to engage. lh'en the dogs are turned up,.their backs will be engaged by the spring-pressedv plungers 85 and will be yieldingly held in inoperative position, as shown at the right in Figs. 1, 12 and 14. But when the dogs 83 are turned down, the heads of the springpressed plungers 85 will engage the surfaces 84 of said dogs and yieldingly hold said dogs in position for action on the saw teeth, as shown at the left in Figs. 1, 12 and 14.

The numeral 86 indicates stop screws adj ustably applied to lugs on the opposite edges of the face plate 22 and which limit the outward or return movements of the levers 76 against the'action of the springs 82. These stop screws 86 are provided with lock nuts 86 which impinge against thev lug with which said screws have threaded engagement.v The feeding device described will feed a saw in either direction, but of course, only one ldog 83.will be'operated at any one time. In U the adjustment shown in Fig. 1, the saw will be fed from the left to the right.

lVhen the crosshead 47 and .the lile have Y reached approximately the limit of their outwardy movement, said plate, and hence the secondary crosshead guide 46, willbe raised by the cam 70 and the upward movementv then imparted tol the arm 8O will cause `its tappet plate 78, operating on the screws 77,r

to impart operative movements tothe levers 76 and operative movementy to the dog 83 that yis turned down to operati-ve position, thereby positively producing the saw-feeding movement. l/Vhen at approximately the limit of the return movement of the crosshead 47, the secondary crosshead guide 46 and arm 8O are lowered and the springs 82 will impart the return movements to the levers 76 and theoperative 'dog 83. Of course, there will be no feeding movementproduced during the time that the file is performng its outward or saw filing movement.

wWhen. the saw has been positioned, the driving dog 83 may be properly set thereto and by adjustment of the co-operatingstop screw 86. lith the stop screw 86 set in any particular position, the amount; of movement that willbe given to the operative dog 83 will be determined by the adjustment of the co-operating screw 77 in resp'ect'to the bearing plate 78. In Fig. 12 the bearing plate78, as shown, is, just moved' into contact with the screws 77 and hence just ready to cause the dog-feeding movement as said plate is moved upward.V

Tosupportthe guide :saw aorisimilar, saw blades there 1s provided a'pair of 'clamping bars rSThaving at .tlieirends, nut-equipped V a 'pair of horizontally spaced .angle bracketsv 89 onfthe tace plate 22',v and theouterv clamping bar 875 is supported on an angle bracket 90 on the vice member 27. A pair of hori- Zontally'spaeed upper-:angle bracketsl 91 on the'face plate'QQ' overlie the inner fclamping bar 87 and -prevent the same :from li'lfting from the angle brackets 39. .The brackets 89, 90 and. 91 hold the claniping bars 87 and hencefthe saw for sti-aight line endwise movement, but permitlimited angular movement otsaidv clamping bars and saw. rlhe clamping bars 87 work just under the jaws 30 and 3l with the toothed'upper edge por! tion of the saw extending above said clamping bars and between the jaws 30 and 31. The adjustmentot the jaw 30 iny respectto the jawsi3l`is such that the saw can just move'between saidjawsanrl is held thereto against angular movement7 and at whichr point the tile acts jon one'o't the teeth just above said jaws. f Heretotore, saw-feeding action in saw tiling machines has beenl produced by action on the old or dull teeth,I and to cut new teeth on a saw bladey it 4has beenfnecessary to clamp the same between toothed bars to which the feeding action is imparted. The result ot tiling a saw/to'which the'iieeding action is produced on` theiold or dull'teeth is that the' teeth will be irregularlyspacedand the tile will notvbe properly positioned between the teeth softhattlie tiling actionon the teeth willv leave theisame' uneven.l y i v @One of the primaryl objects ot my present inventiony is to overcome this-deficiency in saw tiling machines by feeding a saw blade from the flast Atiled toothso that the teeth will beac'curately spaced and it there areY any irregularly spaced teeth in the `saw bladeythey will becorrected. To cut new teeth/I on va vsaw blade it is only necessary to file v'the first toothfand then set thefeeding device Vto start its feeding action 'from this tooth. In carrying out this part otithe in vention, I provide a guide camarni92 arranged tobe Vengaged by cani pins 93 which extend transversely..throughl the dogs S3.

This guide cam arm 92 is detachably andy adjustably attached to the 'faceplate 22 by a nut-equipped bolt 94 which: extends through a longitudinal. .slot 95 in said arm yand tric! tionally" clampsl said armagainstfthe face plate-22.

Then `filinghand saws Yorthe like7 the guide cam arm .'92 will. bey 'attached to the lett-hand side ofthe tace plate 22 so as to .teed said saw from the -lei't vto therighft V(see tending into said cupeshaped member.

Fig. A12). Vithen tiling a band saw,ythe'guide camgarm92 will bereversed and shifted to thevright-hand lside ofV the faceplate 2Q and its bolt;94 passedl through aV hole 96in said tace plate. lV hen tiling la circle saw, the bolt 94 will be passedthrougha hole 97 just loef` low the hole 96.' The guide cam arm 92.1is arranged to `hold the operativedoglSS raised by means of its cam pin 93 and out of con,- tact with the old or dull `teeth during the projecting and retraeting movement of said dog and then allow the samevto drop by gravity during its projecting movement into engagement with the last til-ed tooth and impart a step otl movement to the saw'blade during the liftingof the: tile trom the saw, and which movement corresponds Vto 'the spacing ot the teeth onthe sawblade.V

lt may be here stated that the adjustment of the'jaw 30 in respect to the jaw 31 is such as to place suliicient drag on a saw mounted therebetween to cause the saw blade to partake only of the actual movement imparted thereto by the dog 8 3. During the lowering movementrotthe tile, the dog 83'will be,

lifted from the engaged rtoothby the cam pin 93 and carried. over the old or dull teeth and supported out'l of Contact therewith, as

indicated` by broken,` lines in Fig. 129 By endwise adjustingthe' guidecam arm 92 the same may be set forspacing a predetermined number of teeth per inch, depending upon the saw being tiled, or by raising or lowering theinner end ot the guide cam arm 92, v

the dog 83 may be positioned to drop `by gravity tov the bottoms of the teeth lbeing iledfV a je To hold a circle saw b, with -freedom` to be turnedv about its axis for `ilingfthere is mo'untedon the bolt member '32 a combined clamping and centering device. rlihis device coinprisesfaA cup-shaped 'member 98 e which bears agamst'the faceplate 22and conical inember'99 extending into said cup# shaped member 98 which `loearsagainst the face plate 22 and a conicalA member 99ex- Said members 98/fand199 are provided rwith axialk openings through which. vthe bolt member v32 loosely extends. -To1mount-.the circle saw Z2 inthe machine for iling, the bolt memiis bers 32.33 are separatedand` the'bolt mem- Y ber 32inserted through the eyeof said saw. The conical'member 99 isthen applied to the bolt member 32-a1idinserted through the eye ofthe saw'; as best'shown inlFig. 16. The blade member 33is then applied to the blademember 32 vand screwed against the conical member 99.,V forces the san'ie-into the eye ot `the lsaw. and trictionally kclamps said extends between the jaws 30 and Slandis saw'between therim of the members 98 and l f W ith the saw brv thus mounted, the same 'i frictionaliy heldfthereby for rotation miler Cil pressure to produce step by step saw-feeding action by one of the dogs 83. To sharpen a circle saw after the same is mounted in the machine, as just described, the guide cam arm 92 is reversed and shifted to the left side of the face plate 22, as previously stated, and the left-hand dog 88 is turned into an inoperative position and the righthand dog is turned down for action 'on the teeth of the circle saw. The operation of the machine in sharpening a circle saw and the feeding action thereof is the same as that for sharpening the hand saw with the eX- ception that the feeding action of the saw is from the right to the left.

To raise orlower the two-part bolt 32-33 and the combined centering and clamping device 98-99 and hold the same with the saw properly centered in respect to the file, there is provided a long upright screw 100, the upper end of which is swivelled in the flange of the member 98 l and the intermediate portion thereof extends loosely through a bore in the lug 29 and is provided with a nut 101 which rests on said lug and is held from turning by the face plate 22. On the lower end of the screw 100 is a hand wheel 102 by which said rod may be turned in the nut 101 to raise or lower the member 98 and hence the parts carried thereby (see Fig. 16).

lVhen the machine is-used to file band saws, the saw is fed through the machine from the right to the left, and the pivot for the right-hand lever 7 6 is shifted into a hole 103 in the face plate 22 in order to properly position the respective dog 83.

Springs 104, anchored to the crosshead guide 38 and attached to the secondary crosshead guide 46, are under strain to hold said guide 46 in its low position.

What I claim is:

1. Ina saw iiling machine, a file holder, means for imparting saw ling movement to the lile holder, a saw-feeding dog, means for causing the dog to engage the last tiled tooth, and means for operating the dog to cause the same to move the saw and position the last filed tooth a predetermined distance beyond the position in which it was filed.

2. The structure defined in claim 1 in further combination with adjustable means for varying the distance in which the last filed tooth may be positioned beyond said filing position.

v3. In a saw filing machine, a file holder, means for imparting saw .tiling movement to the iile holder, a saw-feeding dog, means for causing the dog to engage the last tiled tooth, a guide cam arm arranged to cause the dog` to engage the last filed tooth, and means for varying the distance in which the lastfiled tooth may be positioned beyond the position in which it was filed;

4. The structure defined in claim 3 in which the dog is yieldingly held in contact with the guide cam arm and the last filed tooth.

5. In a saw filing machine, a file holder, mea-ns for imparting saw filing movement to the tile holder, a pair of reversely-acting saw-feeding dogs movable to and from operative positions, a shiftable guide cam arm arranged to cause the operative dog to engage the last filed tooth, and means for operating the dogs to cause the operative one to move the saw and position the last iiled tooth a predetermined distance beyond the position in which it was tiled.

6. In a saw filing machine, a base having a face plate, a crosshead guide pivoted to the face plate and supported on the base for horizontal swinging movement, a pair of concentric slots in the base on arcs of circles the centers of which are at the axis of the pivotal support for said guide, and bolts working through said slots for securing the crosshead guide to the base in different adjustments.

In testimony whereof I affix my signature.

FREEMAN n. COLLIER.

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