US552294A - Island - Google Patents

Description

(No Model.-)

S. LONERGAN.

4. FILE GUARD.

No. 552,294. Patented Dec. 31, 1895.

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WH'NEEEIES. G INVENTEIR,

AN DREW EGRAHAM.HIUTUUYNJWASHINGTBKEC I citizen of the United States, residing at Cen- UNITED STATES PATENT OFFICE.

STEPHEN LONERGAN, OF CENTRAL FALLS, RHODE ISLAND.

FILE-GUARD.

SPECIFICATION forming part of Letters Patent No. 552,294, dated. December 31, 1895.

Application filed October 25, 1895.

To all whom it may concern.-

Be it known that I, STEPHEN LONEBGAN, a

tral Falls, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in File Guards; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention is an improved file-guard adapted to be used on files in the sharpening of saw-teeth; and it consists of a thin sheet of steel or other suitable metal, one end of which is shaped to slip over the outer point of a file, triangular in cross-section, the other end made pointed, as with the file, and they both made fast in the handle in the ordinary way.

Figure 1 represents a top view of my improved file-guard as attached to a file and handle. Fig. 2 is a side elevation of the same. Fig. 3 is an enlarged cross-sectional view taken on line :2 so of Fig. 2 with a portion of the saw-blade in elevation. Figs. 4 and 5 are perspective views of my improved file-guard as seen in operative position upon a saw to sharpen the teeth thereof, the saw being illus trated in partial elevation. Fig. 6 is a modification view which shows another form of file in cross-section, with file-guard attached thereto.

In the drawings, A represents my improved file-guard, the sides or faces 3 being entirely smooth between the end f and the point g.

$eria1No. 566,890. (No model.)

The end f is formed to fit over the outer point of the file B, and the opposite end '9 is pointed to enter the handle 0, the whole constructed so that the inner side 8 of the guard lies close up to the cross-cut teeth of the file, said sides 5 being shorter in depth than the side of the file B. (See Fig. 2.)

In referring to Figs. 4 and 5, which show the operation of the file and file-guard on the teeth of a saw-blade, and in a position, as an acute angle thereto, the teeth at, which were not filed before, are now brought to a proper bevel and edge by the cross-cut side a of the file, while the smooth side 8 of the file-guard, having no power to out, cannot injure or dull the already sharpened edge of the alternate teeth m, but leaves said edge sharp.

When the cross-cut side of a file wears dull 5 5 the file-guard can be very readily detached from the file and replaced over the old out side.

The side 5 of the guard is made less in depth than the cross-cut side of the file to allow said file to round out the bottom 10 of the saw-teeth.

I claim as a novel and useful invention and desire to secure by Letters Patent The improved file-guard for attaching to files used for sharpening saws herein described, said file-guard being made of thin sheet metal having one end formed to fit over the outer point of a file, the opposite end pointed to enter with the point of the file in the handle, substantially as shown.

STEPHEN LONERGAN.

Witnesses BENJAMrN L. DENNIS, HENRY P. STONE.

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