US131856A - Improvement in razor-strops - Google Patents

Description

H. cRoFT. `Improvement -n Razor-Strp'ps..

No. 131,856. vPatented om. 1, 1m...

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` To all whom it may concern:

PATENT GEEICE.

HENRY GROFT, OF SPRINGFIELD, OHIO.

IMPROVEMENT IN RAZOR-STROPS.

Specification forming partof Letters Patent No. 131,856, dated October 1,1872.

VBe it known that LHENRY CROET, of

l i Springfield, in the county of Clarke and State of Ohio, have invented anew and valuable Improvement in Razor-Strops; and I do hereby declare that the following is a full, clear, and exact description ofthe construction and operation of the same, reference being had to the annexed drawing making a part of this specification, and to the letters and figures of reference marked thereon.

Figure l of the drawing is a representation of side view of my invention. Fig. 2 is a crossseetion of myy invention. Fig. 3 is a detail View of my invention.

This invention has relation to razor-strops 5 and it consists ,in the construction of a doubleconcave body of hard wood made transversely convex, and isometric with regard to its sharpening-surfaces, said surfaces being covered with leather prepared for the purpose, as

g hereinafter described.

In the accompanying drawing, the letter A designates the wooden core or body, which is preferably made of lignum-vit, box, or other hard and elastic wood which will not readily lose form under the pressure of the razor. In the manufacture of this body a handle, B, is turned at one end. `The opposite concave surfaces lying lengthwise of the block may then be sawn out, and these surfaces then dressed in a lathe or otherwise until they assume a transversely convex form, equal in curvature from end to end, both on the sharpening and on the finishing side ofthe strop. These surfaces are then finished by sandpapering and polishing them until they are free from roughnesses and inequalities, when the body of the strop is completed.

If it is desired toeconomize the hard wood, the handle may be made of softer wood, and the strops may be sawn ont of the hard wood "plankin the economical manner indicated in Fig. 3 of the drawing.

. The concave curve which runs lengthwise ofthe block on each side is an arc of a circle,

the circle being the same for both surfaces,

the objectv being to preserve a uniform effect upon the edge of the razor from end to end of the strop. The contour of the transverse convex curve is preferably that of a iiat ellipse.

The wooden body of the strop having been prepared, the leathers are secured to the curved surfaces thereof. These leathers consist of a hone-leather, a, and a finishing-strop, b. These leathers are prepared inthe following manner: First, the leather is saturated with pure castoroil, and is then what is called buffe-d. The leather thus prepared is used for the finishingside of the strop. For the hone-side a compound or paste is made by combining with the casteroil-superiine iiour of eme'ry and lamp-black.` Hog-skin is preferable to other leather, as it holds the paste better. I

The above description will enable any:y one skilled in theart to make my strop.

I am well aware that it is not new to make a strop with a side concave lengthwise and transversely convex. broadly, such invention.

What I claim as my invention, and desire to secure by Letters Patent, is-

lhe strop herein described, consisting of the body having double-concave and transversely-convex hard-wood surfaces isometric with each other, polished and covered, respectively, Y

of two witnesses. f

HENRY OEOFT.

Witnesses T. J. PRINGLE, SAME. SHELLABAEGER.

Hence I do not claim,`

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