US888669A - Sharpener attachment for pencils. - Google Patents

Description

I No. 888,669.

PATENTED MAY 26, 1908. J. G. ST. JOHN. I SHARPENER ATTACHMENT FOR PENGILS.

APPLICATION FILED OCT. 3,1907.

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UNITED STATES PATENT OFFICE.

JOHN G. ST. JOHN, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO JOHN M. RIORDAN, OF BOSTON, MASSACHUSETTS.

SHARPENER ATTACHMENT FOR PENCILS.

and useful Improved Sharpener Attachment for Pencils, of which the following is aspecification.

The object of this invention is to produce a sharpener for lead pencils and such like, which can be readily placed on and carried by a pencil, and can be readily removed therefrom, and on removal be adapted, prop erly used, to cut, or trim the pencil, as may be desired, and so to sharpen it for use.

To the end stated, this invention, in substance, consists of an attachment for lead pencils, etc., which is composed of a tube of comparatively thin spring steel of suitable length and bore, and which at and along one side is flattened for a portion of its circumference, and at such flattened portion is provided with a longitudinal slot or throat, which is of less width than that of, and extends for a portion only of said flattened or tion, and has one of its longitudinal ec ges slightly projected beyond its outer surface, and which said projected edge is sharpened along its length and so made capable of acting as a cutting-blade to cut, or shave off, or in other words, to plane or trim off the wood and lead of a pencil, etc., and thereby to sharpen it, and all otherwise substantially as hereinafter described.

In the drawings, forming part of this speciflcation, Figure 1 is a side view of a lead penoil of somewhat large diameter and of the pencil sharpener of this invention applied to and carried by it. Fig. 2 is a cross section, on dotted line 22, Fig. 1. Fig. 3 is a view in illustration of the application of the sharpener to the pencil for sharpening it.- Fig. 4 is a perspective view of the sharpener.

In the drawings, A represents a lead pencil of somewhat large diameter and B is its lead, the whole being sharpened at one end.

O is a tube of comparatively thin springy steel and of suitable bore to receive the pencil and hold it by its spring or resilient action against accidentally becoming detached from the pencil while allowing it to be readily re moved and replaced at pleasure. This steel tube may be of greater or lesser length but obviously and preferably its length should be Specification of Letters Patent.

Application filed October 3, 1907.

Patented May 26, 1908.

Serial No. 395,692.

considerably less than that of the full length of the pencil. The tube, also preferably, is split, as at D, along its length from end to end, so as thereby to make it capable of attachmentas described to pencils of varying diameter within, of course, given limits.

The tube for a portion of its circumference and along its length is flat, as shown at E, and this flattened portion has a longitudinal slot or throat F, which extends for only a part of the length of the tube, and has one G of its longitudinal edges G and H projected, as shown at J, Figs. 2 and 3, more particularly, slightly beyond the circumference of the tube, and this projected edge is beveled off and made sharp so as thereby to act as a cutting-edge to out and trim, or as it were, to plane off and so to sharpen a pencil when it is presented thereto by its said cutting edge and flattened face, and is forced or moved there along and under more or less pressure in the proper direction, as for illustration, see Fig. 3; the shavings or clippings passing under the cutting edge and through the throat into the tube somewhat the same as in ordinary hand wood-planes.

Having thus described my invention what I claim and desire to secure by Letters Patent is,

, 1. A sharpener for lead pencils and such li e, composed of a spring metal tube of suitable bore and length, having a flattened side, and a slot extending along said flattened side,

which has one of its longitudinal edges pro' jected slightly beyond the outer surface of the tube and said projected edge sharpened to act as a cutting-blade.

2. A sharpener for pencils and such like composed of a spring metal tube of suitable bore and length, which is split along one side, from end to end, and has another side flattened, and this flattened side provided with a slot that extends along it and has one of the longitudinal edges projected slightly beyond the'outer surface of the tube and said projected edge sharpened to act as a cuttingblade.

In witness whereof, I have hereunto set my hand in the presence of two subscribing witnesses.

JOHN 0. ST. JOHN. Witnesses:

ALBERT W. BRowN, CHARLES R. BROWN.

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