US1014141A - Lead-sharpener. - Google Patents

Description

C. A. GAISER.

LEAD SHARPBNBR.

APPLICATION FILED IBB. 11, 1911.

1,014,141, Patented Jan. 9, 1912.

0%.Qaa'sen wbr/Mmm CHARLES A. GAISER, OF TOLEDO, OHIO.

.nEAD-SHARPENEB.

'Specication of Letters Patent.

Patented Jan. 9, 1912.V

Application led February 11, 1911. Serial No. 608,061.

To all whom 'it may con/cem:

Be it known that I, CHARLES A. GAISER,

l a citizen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Lead.- Sharpeners,'of whlch A the following is a specification.

.fthe invention is not limited in ythis regard,

' moved back and forth thereon and prevent y but is susceptible of use as a leadsharpener generally, either as a pencil attachment, v or a desk appliance.- j

One of the objects of the invention is a Simple, durable and efficient construction of penci Sharpener which will be practically self-c eahing, and which will embody iiles which will properly guide the lead as it is th lead from slipping off the liles, .and the invention also has for an object a device of this character embodying files which are preferably ycylindrical and which are capable' of being turned about their longitudinal axes from time t-o time so as to present fresh file surfaces to the lead, whereby the device may be used a relatively long time, until the entire periphery of the file sections has `been dulled.. And the invention also aims to generally improve thisclass of devices s'o as to vmake them more useful and commercially desirable.

With these and other objects in view as will more fully. appear as the description proceeds, the invention consists' in certain constructions, arrangements and combinations of the parts that I shall hereinafter fully describe and claim. For a full understanding of the invention, reference is to be had to the following description and accompanying drawings, in which:

Figure `1 isa side elevation of my device, showing the same in the rear end of the barrelof'an automatic pencil; Fig. 2 is a Vperspective view of the Sharpener; and, Fig.

3 is a longitudinal sectional View thereof, the files being ,shown in elevation.

Corresponding andlike parts are referred to in the following description vand indicated in all the views of the drawingsy by the same reference characters. yReferring to the drawing, the numeral 1 designates the barrel of an automatic pencil such as that disclosed in my former application, before mentioned, and 2 designates the body portion of the lead Sharpener, the same being preferably constructed of any suitable metal and being designed for insertion in y.the rear end of thebarrel 1`, the body 2 of the sharpening device being designed to receive and hold, at its rear end, a pencil eraser 3, although it is of course to be understood that this feature is not indispensable.

In carrying out' my invention, I provide a bushing or block 4, preferably of wood,

and t the same in the forward tubular end of the body por/tion `or casing 2, said bushing being formed with parallel and longitudinally extending openings 5, that are 'preferably two in number, as clearly illustrated in the drawing. Cylindrical files 6 are inserted at one end in the'openings 5 so asv to project ,from the bushing 4, the files being preferably inserted in the bushing before the latter is inserted in the body por-4 tion 2, and preferably the files are circumf ferentially ribbed, so as to facilitate the operation of inserting them in the openings 5 and also to assist in retaining them in said openings after they have once been secured to the bushing. The outer ends of the liles 6 are kerfed, as indicated at 7, so as to accommodate a screw driver or the like, whereby the files may be turned, as required. The files 6 extend parallel to each other, as shown, preferably with a space between.

From the foregoing description in connection with the accompanying drawing, the operation of my improved lead Sharpener will be apparent. the device, the lead to be sharpened is passed back and forth in engagement with the files and in the crotch which defines the spaceI In the practical use ofself-cleaning. What little lead dust may remain, after the sharpening operation, may obviously be blown ofi'. 1

It is manifest that as the entire periphery of the files 6 constitutes an abrading surface,

and as each file may be turned from time toy time as required by a screw driver or einlilar toollapplied to the kerfed end vott the file, the device may be used 'for a relatively long time, fresh filing .surfaces being brought into operative position from time to time until the entire periphery of each tile has become dulled.

As the opposing surfaces ot' the files that are engaged by the lead are Substantially vertical when the two files are held in the same horizontal plane in the practical use of the device, it is clear that this feature faeilitates'the dropping of the dust down through the space between the tiles and helps to make the device self-cleaning.

Obviously, my improved Sharpener may be very cheaply made and the parte readily assembled.

In the preferred embodimentof the invention, when used with the barrel of an automatic pencil, the Files will be protected at all time when not in use`l as is evident.

Havingl thus described the invention, what' ie claimed as new 15:

AS a new article of manufacture, a pencil Sharpener coi'nprising a holder having sockets spaced apart and extending in parallel relations, and tivo cylindrical members having peripheral abrading surfaces and supported in said Sockets and engaging the Same with eutiieient force to prevent rotary movement therein while in use', butv which will yield for turning when abnormal force is applied.

ln testimony whereof, I affix myvsignature in presence oi* tivo witnesses.

CARLES A. GAISER.

lVitnesseS P. J. KRANZ, EMMA K. SCHMIDT.

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