US1648426A - Saw-filing guide - Google Patents

Description

Nov. s, 1927. 1,648,426

A. K. SEARS SAW FILING GUIDE Filed June '28. 1926 [NVE/V705' ARcH/EKE/qfrs WI zwe'ss 4% Pa-gw@ M @2% PatentedY Nov. Si, i927.

' saw, properly.

iran entraran inane l llt-ENT me ,oftieten saw-ritme Guilin; j

appiteaan filed June as,

Anobject of this invention is to malte provision Whereby one may be enabled to guide a iile with perfect accuracy in the operation ot sharpening a saw.V 'Y c l ylt is important that the sharpened edges 'ofthe teeth oiiasaiv shallbe uniform Vin pitch, and have discovered that such uniformity can be attained in the operation of tiling a savv by providing the tile with level indicator to enable the saw filer to maintain a proper pre-deterinined position ot the iile relative to the edgeot the saw, determined position can be indicated to the eye by mounting a spirit level in such mair- Yner, that the level bubbleviill stand Vin a central position when Athe file is'held in the predetermined position; land that a variation ot the bu blewvill instantly indicate v-to the operatorany deviation'ot the iile :trom true position. 1

The' files Acommonly used for sharpening saw-teeth are triangularlin'cross section, and it is common to iixtheishank of such a :tileA in. handle, and l have'provided tor such file liandles,.a'spirit level attachment which may be Vpractically journalled 'on the shank of thev handle softhat itmay be adjusted to din'erent'positions relative to the cross sectionof` theiile; whereby the centering oi the bubble Will indicate't-hat the cuttingk tace ot' the.l iile is at a proper angle to the toothed edge vot the saw, and the saw iiler will be Warnedfot any variationfrom Vtrue position; and when the iile is held With'the bubble in cent-ral* position, the operator lmay be 'ase sured that the iileis being held in the desired position.

l have provided means whereby the Werliman mayvi'sually determine the correct adjustment' of the spirit level relative to the tile,and said means is shown `in the form oi a scale, and the same may be a vernier scale; and I provide a circular guard with giadua'-` tions thereon, Yand provide a notch on `the level adjacentl to the graduations to indicate at all times the relation of the lile to the correctl operating position. p

' Anobjectis to enable a Workman to file a An object of the'invention is to provideJ means for easily and quickly adjusting the position ofthe level indicator with reference to the file, so" that a uniform and correct bevel ymaybe given the cutting edges of the and such prefv c 192. Serial No. 118,9l3.

saw teeth throughout, When the'ldegreel of pitch desired 'to rbe given has been deterf, mined, and to provide means 'for` guiding the eyefoit the operator, to easily landquickly note the position ot the tile throughouttlie filing operation.v y v f An object ot the invention toprovide improved means, whereby the angle ot the file with reference to the savv may be accu-` rately determined and maintained, Land any particular pitch given to the saw teeth.

, rllhe invention includesincombination with the tile holder, va level setting gage adapty ed for quickattachment to the toothed edge portion of a sawblade, and provided with notches correspondingl Y to thez respective vbevel or degrees of pitch, of Ysaw teeth of different types, iso thatv the level indicatorI may be adjusted With `its bubble in la' central position .when the file is held firmlyf in the' notch of the attachment Acorresponding to the desired shape of the tooth,V andv Will thereafterindicate to the Workman Vduring the tiling operation, any deviation .fromy the vcorrect. angular position.

y Other objects, Aadvantages and features of invention may appear from the accompanying drawing, the subj'oined detailed description and the appended claims. j.` Y Y y The accompanying Vdrawing illustratesjthe invention. Y v l. Figure l is a perspective vview oiian attaclr mentembodying thisfinvention and applied to a tile handle fitted with a triangular tile,

ythe spiritlevel being-shown with the bubble in true central position; n

Figl is an enlarged lplan viexvoif the tile handle with the leveling lattachment thereon i and a fragment ot a iile in `place and the bubble in centralposition.` s Fig. 3 is a transverse Vsection on line m3, Fie-.2#- D.` Fig. l is a view partly from a plane indicated by line m4, Fig; 2,'and showing a partial mid-longitudinal section'as indicated at line aihig. 3, of the iile handle, the'fspirit level and theclamping means for securing the tile. in said handle. f f

Fig. 5 is a detail of the `saw ltooth pitch setting guide mounted on portionxo" the toothed edge of a savv. e Y y Fig'. 6 isa cross section on linev me, Fig.. 5. Fig. f7 iront elevation ot the attach"- ment behind the usual clamping .nieans'ltor tfght upon the cylindrical shank 2, and mayA be forcibly turned thereon by the mechanic 4to adjust the level to different angles relative to the file clamped tothe handle by the lileV clamp 3.

7 indicates a guard fixed to the handle, and against which the journal box of the j spirit level fits. The guard 7 is shown as a circular flange, having a cylindrical periphery provided with markings 8; and the spirit level journal boX 5 isprovided With a cen tral mark 9, which may be brought to register with an appropriate one of the marks 8 on the guard, to bring the bubble of the spirit 4level to a predetermined position which Will indicate the angle to the horizontal, and vertical of the cutting face` of the file l1() for a desired pitch of tooth.

The level vsetting guide'shown'in Figs. 5

'and 6 comprises an oblong block 11 preferably ofcase hardened -tool steel, having in its lovveredge, a horizontal groove 12, and having in-its upper edge a series of notches 13 of dilferent pitch corresponding respectively t-o thepitch of the teeth of the various SWS.

In use the block is placed on the toothedV edge of thesaw and the file is positionedv at rfghtangles thereto, and is inserted into the notch'that has the pitch corresponding to that of the saw to be filed. The spirit level is then turned on the shank to bring the bub- Vble of the spirit level to central position, thus determining the proper position to file teeth to the pitch of the notch in Whiclrthe file is set.

pitch found on the guide.

When the edge. of the saw clamp is level, thereby bringing the toothed edge ofthe saw level the mechanic will set the spirit level in the proper position by turning it on the shank of the handle to bring the mark 9 on the spirit level into 4register With Vthe f appropriate one of the marks 8 on the guard and the operatorvvill take care to maintain the file in such position that the bubble will be central the mark 9 during the filing opV The setting gage isintended for eration.

use when itis not convenient to have the edge ofthe sarvlevel. f

It is necessary that the file shall be held in a'definite position With respect to the vernier scale 8 on the guard 7 and With thisobject in view the tip 14 of the shank is pro-1 vided with a'at surface 15 on its under side In this mannerthe file may be set to any against Which a flat face of the file 1s clamped by the clamp 3 so that When the file is clamped by the clamp it is nonrotatable relativevto thel guard and the Vernier scale 8 thereon, and when the levelingdevice is turned to bring the center mark 9 to the predetermined mark on the scale Sthe exact angle of the file side yrelative to the toothed edge of the saw Will be invariable if such edge i-s held level and the bubble is held in central position.

The position of the bubble relative to the marks on the handle indicate the position of the flat surface relative to al horizontal plane and consequently the angle ofthe file face to the horizontalv toothed edge of the savv and the angle to such toothedr saw edge, of

the tooth edge being filed by the file.

c'laim-y v 1. The combination With a file handle, ofA a spirit level journalled on the handle, and extending transversely of the handle; and a guard integral with the handle provided with a mark to indicate a vpre-'determined position .for the spirit level bubble.

2. The combination With a file handle Q having` a cylindrical shank; of a spiritlevel formed With tongues frictionallyv engaging Y the shank, and a Acircular guard von .the

handle against VWhichthe spirit level abuts. Y l

, 3. The combination with a file handle, of

a spirit level frictionally journaled thereof, and extendingtransversely of the handle; and a 'guard on the handle provided `With marks to `indicate various pre-determined positions for the spirit level bubble.

4, In a saw file holding device, a handle having means for receiving and holding a file in level position, and means .rotatably mounted on the handle for visually indicating the level position of the file.

, 5. A guide or gage for reciprocating `hand tools comprising a handle, a cylindrical ico shank on said handle, means to hold atool in fixed position on the shank, a spirit level adjustable on said shank, a guard on said shank, and co-operating markings on the guard and levelfor Vdetermining the level position of the tool.

6. A guide or gage for reciprocating handr tools, comprising a handle; a shank on said handle; means to hold a tool in fixed position on said shank; a spirit level on said shank; a .guard integral With said shank,

and co-operating markings on the guard and the tool. f Y Y 7. A file level setting'device comprising a handle a shank on said handle; a iile clamp mounted on said shank and adapted for adjustment to hold the file in fixed position thereon; a spirit level adjustable on said shank; aguardon said shank'against which said spirit level is in friction'al engagement, and co-operating markings on l20- levelv for-.determining the level position of the guard and level for determining the level position of the file.v

8. A guide or gage Jfor reciprocating hand tools, comprising a handle; aA shank integral with said handlev and provided with a bore adapted or the reception of the tool end; a ille Clamp adapted to hold .the tool in fixed position on said shank; a spirit level adjustable on said shank; a guard integral with said shank, and said guard and level being formed With co-operating markings for determining Vthe level posit-ion of the tool.

9. A guide or gage for reciprocating hand tools, comprising al handle; means to hold a tool in position in said handle; a spirit level rotatably adjustable on said handle; a circular .guard on said handle and co-operating markings on the guard andrlevel for determining the position of the tool relative to a horizontal plane or line.

10. The combination With a spirit level and a circular linger guard concentric'with the axis of said handle, said guard formed With graduations upon its periphery co-operating with a mark upon said level, and said level adapted. for rota` tion transversely of the longitudinal aXis of said handle and adapted to indicate the posiltion of the level relative to a face of the fi e. l

In testimony whereof, l have hereunto set my' hand at Los Angeles California, this 19th day of June, l1926.

Antonin K. snans.

a file handle ;l vof I

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