US1779910A

US1779910A - Pencil sharpener and point protector

Info

Publication number: US1779910A
Application number: US344783A
Authority: US
Inventors: John S Kisson
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-03-06
Filing date: 1929-03-06
Publication date: 1930-10-28
Anticipated expiration: 1947-10-28

Description

Oct. 28, 1930. J. s. KISSON l,7 i9,910

PENCIL SHARPENER AND POINT PROTECTOR Filed March 6, 1929 L/077/Z/ S. mason/ I dttozmq the Patented Oct. 28, 1930 JOHN S. KISSON, OF ALTOONA, PENNSYLVANIA PENCIL SEARIPENER AN ID POINT PROTECTOR Application filed March 6,

This invention relates to an improved pencil sharpener and point protector of that type adapted for convenient application to the unsharpened end of a pencil to present 5 an eraser for convenient use while writing, and adapted for convenient removal from such end of the pencil and subsequentapplication to the pointed end thereof for use in sharpening the latter as found necessary.

The primary object of the present invention is to provide an improved device of the above kind which is extremely simple and durable in construction and eificient in use.

A more specific object of the invention is to provide a device of the above kind having parts so constructed as to permit convenient and economical manufacture and assembly. 7

A still further object is to provide the sharpening blade, with a projecting innerend portion adapted to initially rabbet the wooden sheath of a new pencil to be sharpened, thereby facilitating the-entrance of the end of the pencil into the body of the sharpener proper, and to thereby greatly facilitate and promote the ease of completing the sharpening operation.

With the above general objects in view, and others that will become apparent as the nature of the invention is better understood, the same consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawing and claimed.

In the drawing: r Figure 1 is an elevational view of a pencil sharpener and point protector constructed in accordance with the present invention, operatively applied to the unpointed end of a pencil. I

Figure 2 is a substantially central longitudinal sectional view of the device shown in Figure 1, detached from the pencil, the line of section being substantially upon the line '2-2 of Figure Figure 3 is a transverse section taken substaptially upon the line 33 of Figure 1; an

Figure 4 is an elevational view of the she ener proper removed from the shell of evlce.

presently become apparent.

1929. Serial No. 344,788.

Referring more in detail to the drawing, the present invention consists of an elongated tubular sheet metal shell 5 of cylindrical form having a relatively short contracted extension upon the inner end thereof which so is divided longitudinally by means of diametrically opposed slots 6 to form a pair of resilient jaws 7 to snugly fit upon and frictionally. engagea conventional pencil 8 to retain the device upon an end of the latter as shown in Figure l. j

Snugly fitted in the shell 5 is a pencil sharpening element, proper, consisting of an integral cylindrical metal body 9 which is slightly shorter than the shell 5 and base tapered or conical axial bore 10 into which the pointed end of the pencil is adapted to enter when sharpening the same. The body 9 is snugly fitted in the shell 5 with the larger end of its bore 10 adjacent and 00- axial with the entrance opening bounded by the jaws 7 of the extension on the inner end of the shell 5, such larger end of the bore 10 being preferably slightly larger than said entrance opening so that the pointed end of the pencil will be readily guided into the bore 10 in an obvious manner. The body 9 has a narrow slot 11 in one side thereof which intersects or communicates with the bore 10 throughout its length, and this slot is of uniform width and extends from the inner end of the body 9 to a point adjacent the outer end thereof as clearly indicated in Figures 2 and 4=. A. relatively wide longitudinal recess 12 is also provided in the periphery of the body 9 so as to extendto opposite sides of the slot 11 and slightly intersect the bore 10 for a purpose which will The recess 12 preferably extends at a slight oblique angle to the longitudinal axis of the body 9 as shown clearly in Figure4 so as to provide a shoulder at one side of the slot 11 which tapers narrower toward the inner end of the body 9 for snugly accommodating the similarly ta- 9! pered sharpening blade 13 which is flatly disposed upon such shoulder and secured there on by means of a stud screw 14 or the like. The screw 14 of course extends through the wider outer end portion of the blade 13 and is threaded into a suitable socket provided in the body 9 at the wider end portion of the shoulder formed by the bottom of the recess 12 at the beforementioned side of the slot 11. In this way the blade is firmly mounted in place with its cutting edge exposed centrally of the width of the slot 11 and parallel with the latter as well as a short distance inwardly of the wall of the bore for effectively engaging and cutting the wooden sheath of the pencil in the sharpening operation. It will of course be understood that the recess 12 gradually increases in depth from the inner end of the body 9 to the outer end thereof in conformity to the taper of the bore 10 so as to insure a uniform cutting or sharpening of the pointed end of the pencil in the required tapered form. It will also be noted that the inner end of the blade 13 projects as at 15 beyond the inner end of the body 9 for the purpose of cutting a rabbet in the sheath of a new pencil at the extreme end thereof When introduced into the larger end of the bore 10. This is especially serviceable in connection with the initial sharpening of unpointed pencils, in which case the entry of the end of the pencil into said bore is facilitated and the subsequent completion of the sharpening operation thereby greatly facilitated.

A slot 16 is.formed in one side if the shell 5, coincident with the recess 12 to permit the ready escape of chips of wood cut from the Wooden sheath of the pencil during the sharpening operation, the slot 11 being exposed through the opening 16 for this purpose. However, in order to provide a smooth finished construction at the wall of the open ing 16 and at the same time to firmly secure the body 9 in place against any shifting from proper operative position, the edge of the a material of the shell 5 surrounding the opening 16 is inturned or clinched inwardly against the side wall of the recess 12 as at 17 especially at the outer end portion of the recess 12 and along the side thereof adjacent the blade 13. At the opposite side of the recess 12 adjacent the inner end of the body 9, the inturned portion 17 may be spaced from the side wall of the recess 12 so as to constrict the opening 16 at this point as much as possible without materially interfering with the proper escape of the chips of wood. The restricted portion of the opening 16 is clearly indicated at 16'.

From-the above description it will be seen that the device is composed of a minimum number of simple and durable parts which may be conveniently and economically manufactured and assembled to provide a very durable and efiicient device of its kind. To further increasethe utility of the device, the body 9 is fitted in the shell 5 so as to leave the outer end portion thereof unoccupied by the body 9 and to permit the insertion of a suitable pencil eraser 18 of suitable rubber composition or the like. This eraser is of conventional form consisting of a resilient plug tightly fitted in the outer end of the shell 5 so as to leave a projecting end portion thereof for use in making proper erasures when the device is applied to the unpointed end of the pencil as shown in Figure 1.

When the pencil 8 is in use for writing, drawing or the like, the device is applied to the unpointed end of the pencil as shown in Figure 1, thereby presenting the eraser 18 for convenient use in making erasures when desired. When it is desired to sharpen the pointed end of the pencil, the device is simply slipped off of the unpointed end of the pencil and applied to the pointed end thereof, the jaws 7 engaging the sheath of the pencil inwardly of the tapered or pointed end portion thereof. This results in entering the tapered or pointed end of the pencil into the bore 10 so that the periphery of said pointed end is engaged with the sharpened edge of the blade 13 throughout. By pressing inwardly on the pencil while rotating the same, the sharpening operation is effected in a well known manner. In initially sharpening a pencil having no pointed end, the desired end of the pencil is entered into the larger end of the bore 10 so that the projecting'inner end portion 15 of the blade 13 will cut a rabbet in the extreme end of the encil sheath when the pencil is rotated relative to the device. In this way, the further entrance of the encil into the bore 10 is eatly facilitate while the completion of ti; sharpening operation is also facilitated by promoting the ease thereof. Obviously, when the device is not required for use, it may be applied over the pointed end of the pencil for protecting the point or lead thereof against breakage.

Minor changes may be made without departing from the spirit and scope of the invention as claimed.

I claim:

1. A pencil sharpener and point protector of the character described comprising a cylindrical sheet metal shell having a contracted extension upon its inner end bifurcated to provide a pair of resilient ian and 3. en-

cil sharpemng element fitted in said s ell,

said pencil sharpening element comprising an integral cylindrical body having a tapered axial bore and a longitudinal slot at one side intersecting said bore, said body having a longitudinal peripheral recess extending to opposite sides of said slot and tapering in depth longitudinally parallel with the wall of said bore, and a sharpening blade secured on the bottom of said recess at one side of said slot and having a cutting ed e disposed parallel with and coincident W151 said slot and intersecting said bore, said shell having an opening in one side thereof coincident with said slot for the escape of chips of wood during the pencil sharpening operation.

2. A penc1l sharpener and point protector of the class described com rising a cylindrical sheet metal shell havlng a contracted extension upon its inner end bifurcated to provide a pair of resilient jaws,' and a pencil sharpening element fitted in said shell, said pencil sharpening element comprising an integral cylindrical body having a tapered axial bore and a longitudinal slot at one side intersecting said bore, said body having a longitudinal peripheral recess extending to opposite sides of said slot and tapering in depth longitudinally parallel with the wall of said bore, and a sharpening blade secured on the bottom of said recess at one side of said slot and having a cutting edge disposed parallel with and coincident with said slot and interseating said here, said shell having an openmg in one side thereof coincident with said v slot for the escape of chips of wood during the pencil sharpeningoperation, the edge of said shell about said opening thereof being inturned against the side wall of said recess. In testimony whereof I aflix my signature.

JOHN S. KISSON.