US1136257A - Saw-filing device. - Google Patents

Description

W. T.0HARA.

SAI/V FILING DEVICE. APPLICATION man Amm, 1914.

Patented Apr. 2o, 1915.

Z SHEETS-SHEET 1.

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vv. T. o'HARA. V

SAW FILING DEVICE. APPLICATION FILED APILZT. 1914.

Patented Apr. 20, 19115.

2 SHEETS-SHEET 2.

atl'omm a n. N. w c m H w m T M. m o H P s R E T E P R R o N E m WILLIAM T. OI-IABJA, OF SPOKANE, WASHINGTON.

saw-FILING DEVICE.

Specification of Letters Patent.

Patented Apr. 249, 1215.

Application led April 27, 1914. Serial No. 834,725.

T0 all 'whom it may concern.'

Be it known that l, WILLIAM T. OHARA, a citizen of the United States, residing at Spokane, in the county of Spokane and State of Washington, have invented new and useful Improvements in Saw-Filing Devices, cf which the following is a specification.

My invention relates t0 improvements in machines for filing saws and it comprises a novel construction, combination and arrangement of parts hereinafter described and claimed.

lt furthermore provides a saw filing machine which is simple in construction, practical in use and capable of filing a saw with a bellied or straight edge. Y

Further features of this invention will be set forth by the following description taken in conjunction with the drawings annexed hereto and which form a part of this speci-l fication, and in which Figure 1 illustrates in side elevation a saw filing machine constructed according to my invention. Fig. 2 illustrates in side elevation and partly in section, the device for holding the file. Fig. 3 is a section on the line 3 3 of Fig. 1. Fig. 4 is a view in end elevation looking in the direction of the arrow 2 shown in Fig. l. Fig. 5 is an enlarged detail view of that portion of the device inclosed by the lines 5 5 of Fig. 3. Fig. 6 is a section on the lines 6 6 of Fig. 2. Fig. 7 is a section on the lines 7 7 of Fig. 4. Fig. S is a plane view of the adjusting dial showing the file guides at right angles with the carriage track.

rl`hroughout the separate views the same part is designated by the same reference character.

The preferred embodiment of saw filing machine as illustrated in the drawings and constructed according to my invention, comprises a combination of one 0r more suitable clamps 1 1 adapted to secure the device to a table or work bench, said clamps being connected together by the member 2 secured to the said clamps by the rivets 3 and having the ends 4 thereof bent at right angles to the main portion for a purpose which will be hereinafter fully set forth.

Secured to the member 2 by means of the rivets 5 and situated intermediate of the clamps 1 1 is the track hanger 6 and oppositely thereto and secured to a projection carried by the said clamps 1 1 is a similar track hanger 6, each of said hangers carrying at their upper ends a seat 7 and 7 respectively, suitably adapted to support the track members 8. At each end of the saw filing device is secured a bifurcated member 9, each of said members having the arms thereof secured at the upper end to the tracks 8 by means of collars 10 and having the lower ends adjustably slidable in the vertical slots 11 carried in the ends 4 of the member 2, which ends have marked thereon a suitable scale 12, it being possible, by means of the screw and thumb nut arrangement 13, to secure in any desired position, theends of the bifurcated members 9 so that a warp or bow may be' pnt in the tracks 8 8 if it is wished'to file a saw in the bellied form. Also at each end of the saw iiling machine and secured to the members 2 are the upright arms 14 carrying at the upper ends thereof clamping jaw 15 continuously extending between said members- 14 and having in the face thereof a resilient strip of friction material 15a, such as rubber or the like. The 'said clamping jaw and strip coperate with a similar jaw and strip 14 and 15, respectively, carried by the U- shaped members 16 pivoted at 17 to the upright arms 14, the members carrying the jaws 15 and 15 forming a vise, by means of which the saw 18 may be secured in the machin-e without danger of marking or marring it, and the device is clamped after the saw has been placed in the position. shown in Fig. 3, by means of the cams 16 carried by the shaft 19, said cams bearing on the said members 16 and forcing the clamping jaw 15 toward the jaw 15, said shaft 19 being journaled as shown at 20 and operated by means of a lever 20.

1t will be evident that thus far the device is complete except as to the arrangement of parts for ling the saw. For this purpose a slidable carriage 21 is mounted on the tracks 8 8 and has incorporated therein an adjustable jaw 22 running on one cf the tracks 8 and having the thumb screw device 23 by means of which the tension of said jaw may be adjusted to prevent it from sliding too easily along the tracks 8 8. In the top plate 24 of the said slidable carriage 21 is pivoted the revoluble protractor plate 25 having mounted thereon inverted U-shaped guides 26 to guide the member 27 carrying the file 28.

The member 27 is constructed in substantially the same form as the well-known hack saw, eXcept that in Vplace of the usual means for holding the saw in place, it has at being regulated by means of the ring 31 bearing on the working surface 32 of the jaws of the chuck.

V'For the purpose of properly moving the carriag`J 21 along the tracks 8 8 the outer track is provided on its bottom with rack teeth 34, best shown in Fig. 7, and the clamping member 22 of the carriage 21 carries a dependent member 35 having a U- shaped cross section, and having journaled therein a gear 36 carried on the shaft37 mounted in said dependent member 35 and Y in such a position that the teeth of said gear engage the teeth 34 carried by the said tracks 8. Also mounted on the shaft 38 and carried by the dependent member 35 is the small-gear 39 meshing with the large gear 36. The shaft 38 carries on its outer end a ratchet wheely 40.k Loosely mounted on the outside of the dependent member 35 is a handle`41 and it may be preferably mounted as shown on an extension on the shaft 38. This handle carries a multiplicity of pawls 42 adapted to engage the ratchet wheel 40, which in turn, when the handle-41 is operated, imparts movement to the gear 36 engaging the teeth 34'on the track 8 and thereby moves the carriage 21, which is secured to the dependent member 35, along the tracks 8 8. However, for the purpose of limiting the movement of the handle 41 two projecting lugs 43 and 43 are provided on the surface of the said dependent member 35, and for further allowing the operator of e the saw filing machine to limit the movement of the said carriage 21, the said projecting lug 43 is made removable and a seriesof holes 44 are provided in the side face of the 'member 35, thus it will be seen that the lug 43 may be placed in any one of the said holes 44 thereby regulating the movement of the said handle 41 and carriage 21 cooperatively acting therewith.

It will be evident that the operation' of the device is extremely simple, it only being necessary for the operator to clamp the saw between the members 15 and 15 at the proper height, then set the lug 43 in the proper hole suited to the gage of the saw and reciprocate the member 27 carrying the file 28. After each reciprocation thereof the handle 41 should be operated to move the carriage 21 in the proper position to file the neXt tooth. The angularity of the file with respect to the longitudinal edge of the saw must also 'be set by means of the prot'ractor carried in the top plate 24 of the carriage 21. When the end of the saw is reached, the saw is reversed and the carriage set back, and the operation is repeated until the saw is completely filed.

Of course it is to be understood that I do not limit myself to the specific combination and arrangement of parts herein set forth and described, but I resort to such modiications in practical use as fall within the scope of my invention as dei'ined by the appended claims.

Having thus described my invention, what l claim is 1. A saw filing machine, comprising in combination, a plurality of suitable clamps for securing said machine in position, a connecting member for said clamps, an adjustable vise carried by said connecting member, means for operating said vise, one or more tracks, supports for said tracks secured to said connecting member, a movable carriage mounted on said tracks, reciprocating means carried by said movable carriage and adjustable with respect thereto for filing the saw, and means for bowing said tracks whereby said saw may be led with a bellied cutting edge.

2. A saw iiling machine, comprising in combination, means adapted to secure the saw in position, tracks adapted to support a movable carriage, a movable carriage mounted on said tracks, means carried by said tracks for filing the saw, and means for bowing said tracks whereby said saw may be filed with a bellied cutting edge.

3. A' saw filing machine, comprising in combination, means for securing said machine in position, means for securing said saw in position, tracks normally parallel to the cutting edge of said saw, a saw iiling device mounted on said tracks and movable with respect thereto, and means for distorting said tracks whereby said saw may be filed with a bellied cutting edge.

4. A saw filing machine, comprising in combination, means for holding the saw in position, a movable iile carriage, a file holder mounted on said carriage and adapted to move transversely of said saw edge, and means whereby said saw may bc filed with 'a belliedcutting edge.

ln testimony whereof l aiiix my signature in the presence of two witnesses.

VlLLIAM T. OHARA.

Witnessesz HAROLD SCANTLEBURY, EDNA BnoYLus.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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