Marking-tool.

f Application filed Feb. 20, 1901.) (No Model.)

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INVENTOR

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ATTORNEYS

THE HORR|S PETERS CO . PHOTO-LITHO. WASH'NGTON. 0, C.

United States Patent Office.

MICHAEL FRANCIS CLARKE, OF FARMINGTON, TERRITORY OF NEW MEXICO.

MARKING-TOOL.

SPECIFICATION· forming part of Letters Patent No. 678,643, dated. July 16, 1901, Application filed February 20, 1901. Serial No. 48,083. (No model.)

To all whom ii may concern:

Be it known that I, Michael Francis Clarke, a citizen of the United States, and a resident of Farmington, in the county of San 5 Juan and Territory of New Mexico, have invented a new and Improved Marking-Tool, of which the following is a full, clear, and exact description.

The invention relates to woodworking-tools; io and its object is to provide a new and improved marking-tool which is simple and durable in construction, arranged for convenient handling by the operator, and adapted to form a perfect mark on the wood when drawn along 15 an edge of a carpenter’s square, straight-edge, or like instrument.

The invention consists of novel features and parts and combinations of the same, as will be fully described hereinafter and then pointed 20 out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corre25 sponding parts in all the views.

Figure 1 is a perspective view of the improvement. Fig.' 2 is a plan view of the same. Fig. 3 is an end view of the same, and Fig. 4 is a cross-section of the same on the line 4 4 30 in Fig. 2.

The improved marking-tool consists, essentially, of a shank A, preferably made triangular in cross-section and carrying at one end a handle B and formed at its other end 35 with an integral head C. The head C has its forward face beveled downward and sidewise to form a point C', adapted to cut into the wood when the tool is drawn along a square, straight-edge, or like instrument. The head 40 is also provided with a cutting-lip C², which projects beyond the plane of one of the sides of the shank A, as in plainly indicated in Figs. 1 and 2, the cutting-lip increasing in width from the point C' to the rear end thereof. 45 The bevel of the head C forms edges 0^s C¹ C³, of which the edge C^s is in alinement with the front face A' of the shank A and extends from the point C' upwardly and rearwardly, and the edge C⁴ is the cutting edge of the lip 50 C², while the edge C⁵ extends on the top.of the head to and.across the lip C², as is plainly indicated in Fig. 2. By the arrangement described the tool can be readily drawn along a T-square, straight-edge, or similar instrument over the wood to be operated upon by 55 the carpenter, so as -to make an exceedingly sharply-defined marking-line to enable the carpenter to cut the wood properly and produce an accurate joint.

In using the device the operator takes hold 60 of the handle B and places the front or working face A' against the edge of the T-square, straight-edge, or the like and then pushes the tool forward to cause the point and edges C^s C⁴ to enter the wood and cut a groove with 65 a vertical wall in alinement with the edge of the T-square and with the bottom of the groove beveled from the lower end of the wall to the top surface of the wood. The depth and width of the groove depend on the pres- 70 sure exerted by the operator on the handle B. Now by inserting the saw into the groove and keeping it against the vertical wall of the groove while sawing a very accurate cut is made to insure proper joining. 75

For very heavy timber the cutting-lip C²is brought into use to gouge out the timber on the face thereof along a straight-edge to produce a recess of sufficient depth and width for the entrance of a crosscut-saw employed 80 for cutting the timber along the joint-mark. Thus the crosscut- saw readily enters the wood as it is guided in the recess, which latter extends along the proper joint-line.