US369908A - Cutting-tool gage - Google Patents

Description

(NoMode 1.)

LA FAYETTE BLAIR.

CUTTING TOOL GAGE.

Patented Sept. 13, 1887..

Ill/VENTOR WITNESSES QJVTJ.

N. PETERS. imam-Lithographer. Washingtnm D. C.

lJNiTED STATES Parent 1;? tries.

LA FAYETTE BLAIR, OF PAINESVILLE, OHIO.

CUTTING-=TOOL. GAGE.

SPECIFICATION forming part of Letters Patent No. 369,908, dated September 13, 1887.

Application filed December 28,1886. Serial N 0. 229,823.

To all whom it may concern:

Be it known that I, LA FAYETTE BLAIR, of Painesville, in the county of Lake and State of Ohio, have invented certain new and useful Improvements in Outting-Tool Gages; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains tomake and use the same.

My invention relates to an improved cutting tool gage or guide adapted to raising slivers for blindhailing and to carving and various other purposes, in which a chisel or other cutting tool required is held between guide blocks, with means for clamping the blocks to hold the tool, to the end that a light, cheap, simple, and useful device is bad to gage the depth of the out.

In the accompanying drawings, Figure 1 is a View in perspective of my improved device. Fig. 2 is a side elevation with the one check piece or part of the guideblock removed, the

cutting-tool being shown in dotted lines. Fig.

3 is a plan with the cutting-tool removed. Fig. 4 shows various cutting-tools adapted to be used with such gage or guide blocks.

A represents a cutting-tool, the shank of which is usually bent in about the form shown in Figs. 1 and 2, and has a suitable handle, A, mounted thereon. The tool may be ofany desired width, and may have any form of cutting-edge, three varieties more commonly used being shown in Fig. 4.

The tool is usually quite narrow, as it is only intended for light work and to be operated wit-h one hand. For blind-nailing the tool is substantially a narrow chisel, usually abouta quarter of an inch or less in width.

The guide-block is made in halves, the division being longitudinal, the two parts B being alike, except that they are made right and left handed. Each block B has a slight shoulder, 1), on the inner face thereof, and set at the desired angle for supporting the tool in about the position that a plane is usually held in the plane-stock. The retaining-screw b passes through one block B and screws into the other block, while the abutment-screw b screws through one block and abuts the inner face of theother block. These screws may be of any desired length to accommodate tools (No model.)

of such width as may be required. By unscrewing the screw b the blocks are separated the distance required to receive the cuttingtool between them. By tightening the screw the tool is clamped between the blocks, after which, by tightening the abutment-screw b", the heels of the blocks are slightly separated and the toes of the blocks made to press more firmly upon the edges of the tool near the cut ting-edge of the latter.

In the drawings the device is represented full size, although of course the size might be varied, it necessary.

When hard-wood finish is used, or, in fact, any wood that is not to be painted, a sliver is raised for blind nailing, and after the nail is driven glue or shellac is applied, and the sliver pressed back to its place, and if the work be carefully done no marks will appear when the wood-work is finished.

With my improved device the sliver is raised in a moment and without any danger of breaking the sliver.

[n carving and various other kinds of work where it is desired to gage the depth of the cut my improved device will be found useful, more especially as the gage-blocks do not conceal the point of the cuttingtool or the work in advance of the cutting-tool.

What I claim is 1. As a new articleof manufacture, a guideblock for a cuttingtool, made in two sections and provided with clamping-screws for looking the sections together and for clamping them against the opposite side edges of acutting-tool.

2. The combination, with a guide-block or gage made in sections and a cutting-tool located between said sections, of a retaining and abutment screws for'looking the sections of the guideblock together and for clamping them against the opposite side edges of the cutting-tool, substantially as set forth.

In testimony whereof I sign this specification, in the presence oftwo witnesses, this 29th day of November, 1886.

LA FAYETTE BLAIR.

Witn esses:

Snxrus SLOAN, OSCAR BAILEY.

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