US1528177A - File - Google Patents

Description

Patented Mar. 3, '71925.

UNITED sr-Aras -lnonnar r. ADAMS, or FORD, WASHINGTON.

FILE.

Application filed July 25, 1924. Serial No. 728,254.

To all who/m, t may concern.' Y

Be it known that I, ROBERT P. ADAMS, a citizen of the United States, residing at Ford, in Stevens County and State of Washington, have invented certain new and useful VImprovements in Files, of which the following is a specification.

The present invention relates to improvements in files which improvements are herein illustrated and embodied in a rectangular, single-cut lile, but it will be apparent that a double-cut file or similar tool of other shape may be utilized for the application of my invention. l

The primary object of`- my invention is the provision of a file especially adapted for use by Vwood sawyers for sharpening the teeth of saws. In addition to theperformance of the usual functions of a tool of this type in sharpening Saws and for other` purposes, means are provided for removing the rough edges of the raker teeth of cross cut saws. This object is accomplished by applying the file to the concave curved edge of the raker teeth, to sharpen and maintain the teeth in best condition for their work.

Under ordinary conditions when an angular file is used for the above mentioned purpose, the angular file cuts intothe saw teeth and weakens them, rendering the tooth liable to breakage. The breaking of a tooth results in the necessity for filing the whole saw for the purpose of forming new raker teeth for cooperation with the-cutting teeth of the saw.

I eliminate the possibility of this undesirable condition and consequent loss in time and labor in re-sharpening the saw by providing a rectangular file with a rounded portion which readily adapts itself lfor this purpose.

The invention consists in certain novel combinations and arrangements of parts in the construction of the file as will hereinafter be more fully pointed out and claimed and as illustrated'in the drawings.

The drawings show one complete example of the physical embodiment ot my invention wherein the features are combined and arranged according to the best mode I have thus far devised for the practical application of the principles of my invention.

Figure 1 is a perspective view showing a 4file embodying the invention and in position for use by the Sawyer when sharpening a raker tooth of a cross cut saw.

Figure 2 1s an enlarged detail view in cross section ofthe file showing it in operative position for filing the curved edge of a raker tooth of a saw.

type of flat file indicated as a whole by theV numeral l, the tang 2 and wooden handle 3 being of usual or suitable formation.

Along one of the longitudinal edges as l of the file is fashioned a Smooth portion 4. which is rounded with a convex curve in a plane transversely of the rectangular file, the teeth or cutting ribs 4 on one flat face of the file and the angularly disposed teeth 4: von the adjacent edge of the file terminating at and merging with the opposite sides of this rounded smooth portion. The terminals of the file teeth at the opposite sides of this smooth portion 4, as shown in Figure 2 are utilized for operation on the raker tooth 5 of a cross cut saw. Between the raker tooth and the adjoining cutting tooth 6 a space is provided, and the forked raker tooth as usually constructed is fashioned with a concave edge 7.

. Figure 2 illustrates the use and action of the file of my invention wherein the convex round-ed, longitudinal edge of the file may pass harmlessly along the concaveedge of the tooth without danger of ruining the tooth, but permitting the iiat face of the file to remove the burr from the cutting edge of the tooth.

By preference and to make an efficient tool, I use line teeth on the upper face of the le and comparatively coarse teeth on the under face. Likewise, the right edge is correspondingly coarser than the left. This to permit finer finish of the cutting edges, the tine le on top coming naturally to iinish the under parts of the raker teeth while the coarser teeth of the file I use for the purpose of slimming the teeth and filing the tops of the rakers.

Having thus fully described Iny invention, what I claim as new and desire to secure by Letters Patent is:-

l. A rectangular file having a rounded,

6 smooth longitudinal edge.

2. A rectangular file lia-ving cutting teeth on its Hat face and on its adjoining'perpendieular side, and a smooth longitudinally v extending edge between said two sets of 19 teeth.

3. A rectangular le having standard eutteeth on the bottom face and on the. right edge, With ner teeth on the top face and left edge, and a smooth, longitudinally extending edge between sa'id two Sets of finer teeth.

In testimony whereof I affix my signature.

-ROBERT P. ADAMS.

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