US1306903A

US1306903A - Pektcil-shabpbhek

Info

Publication number: US1306903A
Authority: US
Publication date: 1919-06-17
Anticipated expiration: 1936-06-17

Description

T. IMAIZUMI,

PENCIL SHARPENER.

APPLICATION FILED NOV-6,1918.

Patented June 17, 1919.

mwwm IfJE/VTOR T312711 Jim Imaizumi rarnnrr oi TATSUJIRU IMAIZUMI, OF SEATTLE, WASHINGTON.

PENCIL-S HARPENER.

mosses.

Specification of Letters Patent.

Patented dune 1'7, ftlilfl.

Application filed November 6, 1918. Serial No. 261,358.

To all whom it may concern:

Be it known that I, TArsUJmo IMAIZUMI, a subject of the Emperor of Japan, and resident of the city of Seattle, county of King, and State of /Vashington, have invented certain new and useful Improvements in Pencil-Sharpeners, of which the following is a specification.

My invention relates to pencil Sharpeners and consists of a pencil sharpener intended for carrying; in the pocket, or for attachment as a fob.

The object of my invention is to produce a device of this sort which shall be effective in its operation.

My invention consists of the parts and combinations of partswhieh will be particularly defined in the c aim.

The accompanying drawings show my invention embodied in its preferred form.

Figure 1 is a longitudinal sectional view, showing, in perspective, my device.

Fig. 2 shows, in perspective, the conical frame to which the cutting blade is secured.

Fig. 3 is a perspective showing the device assembled, and Fig. f a perspective showing a section of one of the cutting blades.

As herein illustrated, I have embodied the pencil sharpener, which. is the subject of my invention, within a case which consists of a tubular member F, to one end of which is secured a conoidal tip I. These two parts are separable by unscrewing, being secured by threads K which are formed on the outer surface of the conoidal tip I and the inner surface of the cylinder F.

I have also provideda roughened file-like surface J, on the inside of the tip I, the purpose of this being to sharpen the lead after the wood has been pared away, if this be desired. This tip will serve as a holder for the shavings removed, so that it may be taken out occasionally and emptied, thus preventing the scattering of these shavings so 'as to make dirt.

The other end of the cylindrical case F is provided with a base flange H, this having a central hole of asize to snugly receive a lead pencil. Secured to the casing at this end is a frame which is shown separately in Fig. 2.

This frame C is of a conical outline. The greater portion thereof is cut away so as to leave a. series of arms M. The openings which have been formed in this cone do not extend entirely to the lower end, thus leaving a band N connecting the lower ends of the bars M. The upper or base end of the cone C may be provided with ears E by means of which it may be secured, as well, to the end piece H. i

The cutting blade is a slight strip of steel twisted into the form of a conical helix. This is secured to the parts of the cone O and preferably by the interposition of spacing members D. At its ends this blade may be offset to form feet 0 which answer to hold it away from the supporting frame, instead of the spacers D.

. The purpose of supporting this knife in spaced relation with the bars M is to provide clearance of the shavings. Thecuttinp; edge B is placed downward. The opening in the lower end of the supporting framework or cone C, is large enough to permit the passage of the lead.

In sharpening a pencil it is inserted within the sharpener and rotated. The cutting; blade A'will take off spiral shavings of the wood but will not cut the lead. If it is desired to also bring the lead to a sharp point, thi may be done by rubbing it upon the roughened surface J when the tip I has been removed. as it would be in order to discharge the shavings. If, however, a sharpened point for the lead is not desired, this may be omitted.

The entire device is of such size that it may be conveniently carried in a vest pocket. I have also shown it as provided withv a ring L at one side so that it may be worn as a fob.

What I claim as my invention is:

' A pencil sharpener having ribs converging to form elements of the surface of a cone and a cutting blade in the form of a conical helix secured to and within said ribs, by means which space it away from said ribs.

Signed at Seattle. Washington, this 30th day of Qctober, 1918.

TATSUJIRU HIAIZUMT.