US300375A

US300375A - Assig

Info

Publication number: US300375A
Authority: US
Publication date: 1884-06-17
Anticipated expiration: 1901-06-17

Description

(No Model.)

J. T. KNAGGE.

PENCIL SHARPENER.

A Patented June v I 22 ma,...

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N, Pains, Fhmo'umngnphr. washington D, t;

STATES OHIO, ASSIGNOR OF OXEHALF TO l OF SAlllE PLAGE.

PENGlLSHARPENER.

LPECIEICATEON forming part of Letters Patent No. 300,375, dated .Tune 17, 1884-.

Application filed January 2l, 155311. (No model.)

I0 all when?, it may concern:

Be it known that l, JOHN T. Katleen, a resident ofthe eity of Cincinnati, in the county of Hamilton and Stute of Ohio, have invented r certain new and useful Improvements in Peneil-Sharpeners, of which the following is a specification.

The several features of my invention and the various advantages resulting from their use, eonjointly or otherwise, will be full1 apparent from the following specification.

In the accompanying drawings, Figure l represents a view in perspective of a pencilsharpener illustrating certain features of my invention. Fig. 2 represents a vertical eentral orossseet-ion ofthe devices shown in Fig. l. Fig. 3 represents a vertical central longitudinal section of the devices shown in Fig. l. Fig. i represents a top view of the holder on which the sharpeningplate is supported when constructed as shown in Fig. l. Fig. 5 ropresents a top View or' a blank from which the sharpeningplate is out, and also showing the preferred shape of the eut blank out of which the sharpening-plate is to be fern-led. Fig. 6 represents a top view ot the sharpening-plate formed ont ofthe blank shown in the preceding ligure. Fig. 7 represents a blank out of which is eut the plate or elainp which may be used as a ineans for holding the sharpeningplate in the holder, sueh as is shown in Fig. l. Fig. S laffords a top view of the blank last named after being punched or out; and Fig. 9 represents a top view of a blank out of which the blank for the sharpening-plate maybe eut., said blank being introduced to show the preferred forni of ille eut upon the sharpeningplate when the Inore Common inode of using my peneilsharpener is to be employed.

A indicates the sha rpeni ngplate. The blank C upon `which the sharpening-plate is made is provided on one side with a vtile or rasp surface, B.

I have found that it is desirable to provide a large plate, as D, (see Fig. 5,) of requisite and even thiekness,and ofany preferred length and breadth, and indent the upper surface of this plate,so as to forni proper ille or rasp teeth, and then to eut ont of this blank the blank Ofor my sharpeniiig-plate. The sharpening-plate blank G preferably tapers, as shown, the sides a c1. of said blank approaching eaeh other as they continue toward one end ofthe blank, and diverge from each other as they are followed toward the other end of the blank. The side edges, a a, of the sharpening-plate blank C are bent upward, thus forming the blank into a finished plate, A. rEhe bottoni of the groove or channel Z) thus formed in the plate A may be rounded in cross-section, or consists of a very narrow 'llat portion; but it preferably consists of a inere line, as shown in Figs. l and 2. It will be observed that when the top of the edges a u of the plate horizontal the bottoni of the groove will incline upward from where the groove is widest to where the groove .is na-rrowest. The 'object of this formation of the groove will be apparenthereinaf't-er when the inode of using theppeneil- Sharpener is described. Thesharpeningplate is to be supported in any desired manner. A preferred forni of support when the sharpener is to be made portable, consists as follows: A bleek, as D, of suitable material, preferably of wood,is provided. This bloek is preferably of about the length ofthe sharpening-plate A, and a groove, d, of the shape ofthe bottoni of this plate, is formed in said bleek. (See Figs. l, 2, 3, and l.) Into this groove d the plate A is iitted.

Various modes of seeu rin g the plate in plaee may be employed, a convenient one of which is as follows: A blank, E, of thin sheet metal, preferably tin, is formed, and the edges e on the sides and ends are bent up. A triangular opening, f), is then punehedor otherwise made in the blank. (See Fig. 8.) The central portion of the uneut strip g of the blank E is also out away. The blank E has now been eonverted into a cover, II, and this cover is placed over the top of the bleek D, holding, as afore- 1nent-ioned,the sharpening-plate A. (See Fig. l.) The edges e of the cover respectively engage the sides and ends of the block. The cover is now fastened to the bleek in anyv suitable nianner by nails, screws, glue, ike., but preferablr by forming indentations h in the edges e of the eover. These indentations enter the wood or material ofthe block D, and thus the eover is securely held in place upon the bleek.

The inode of employing the peneilsliarp- IOO . plate, and is drawn back and forth in the direction of its length. One side of the front end of thc pencil is now rapidly sharpened. As the bottom of the groove inclines upward as Well 1s that the sides of the groove converge, the side ofthe end ofthe pencil will be systematically sharpened. By turning the pencil around and continuing the operation, the other side or sides of the pencil will be systematically sharpened. Should it be desired to form a short point on the pencil, the latter is held so that its axis of length is substantially parallel to the top edges of the sharpening-plate. On the other hand, if it be desired to form a long point on the pencil, the latter is laid on vthe bottom portion of the groove, the axesvof length ofthe groove and the pencil coinciding.

Any suitable description ofile or rasp teeth may be' employed; but the preferred form of teeth to be employed is that known as the fish-scale7 cut,which teeth cut in both directions, (see Fig. 9,) so that the end of the pencil will be reduced during both the forward rand opposite movements which are imparted to it while applied to the sharpening-plate. For sharpening lead-pencils, the 'file-teeth are preferably coarser than for slate-pencils, unless the Sharpener is to be used exclusively for pointing the leads of lead-pencilsand thenl the teeth of the sharpening-plate will be very iine.

Vlien preferred, th e sh arpener in ay be made out of a thick piece of metal provided with a groove substantially of the shape described, the surface of the groove being roughened.

Vhile the various features of my invention are preferably employed together, one or more of them may be employed Without theremainder, and, when desired, one or more of said features may be employed,so far as applicable, in connection with pencil-Sharpeners of descriptions other than that herein specifically specified.

Vhat I claim as new and of my invention, and desire to secure by Letters Patent, is

l. A pencil-sharpener consisting of a tapering roughencd plate bent along a central line, to bring the roughened faces at about right angles to each other,substantially as described.

2. rlhe combination of the sharpening-plate provided with, groove b,inclined at bottom and sides, and the block D and cover H, provided With opening]` and :flanges e, respectively engaging the sides and ends of the block D, substantially as and for the purpose specified.

3. The combination of the sharpening-plate provided with groove I), inclined at bottom andfsides, and the block D and cover H', provided with opening fand flanges c, respectively engaging the sides and ends of the block D, and having indentations 7L in its flanges, said indentations entering the block, substantially as and for the purposes specified.

JOHN T. KNAGGE.