US1341943A

US1341943A - Pencil-sharpener

Info

Publication number: US1341943A
Application number: US317149A
Authority: US
Inventors: Charles E Stone
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-08-13
Filing date: 1919-08-13
Publication date: 1920-06-01
Anticipated expiration: 1937-06-01

Description

C. E. STONE.

PENCIL SHARPENER. V

APPLICATION FILED AUG..|3. 19x9.

1,341,9 3 Patented June 1,1920.

CHARLES E. STONE, OF BOSTON, MASSACHUSETTS.

PENCIL-SHARPEN ER.

Specification of Letters Patent.

Patented June 1 1920.-

Application filed August 13, 1919. Serial No. 317,149.

To all whom it may concern:

Be it known that 1 CHARLES E. STONE, a citizen of the United states, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Pencil-Sharpeners, of which the following is. a specification, reference being had to the accompanying drawings. 7

This invention relates to improved pencil sharpeners, and one of the objects of the invention is to provide a simple, efficient and practical device of this kind, which can lac-manufactured at a relatively low cost and sold at a reasonable profit. 7

It is well understood that pencil sharpeners of various characters have been heretofore produced and in most of them the holder for the pencil is rotated at the same time the grinding member is operated, and since the lead in the pencil is very often eccentric to the outer surface of the wood, the wood will be ground away unevenly with relation to the lead.

Therefore, it is the aim of the present invention to provide a pencil sharpener including a standard on which a rotating member is mounted, and which member carries an abrading or grinding element, in combination with a holder, so' positioned relatively to the grinding element, that the pencil may be held at an angle to the element, and by rotating the pencil independently of the holder, the wood around the lead may be ground away evenly.

While the design and construction at present illustrated and set forth is deemed preferable, it is obvious that as a result of a reduction of the invention to a more practical form for commercial purposes, the invention may be susceptible to changes, and the right to these changes is claimed, pro vided they are comprehended within the scope of what 'is'claimed.

The-invention comprises further features andcombination of parts, as will-be hereinafter set forth, shown in the drawings and claimed.

In the drawings:

Figure 1 is a view in perspective of an improved pencil sharpener constructed in accordance with the invention.

Fig. 2 is a view in elevation showing the side of the pencil sharpener opposite to that shownin Fig. 1.

Fig. 3 is a vertical sectional view on line 33 of Fig. 2.

Fig. 4: is a detailed perspective view of the receptacle detached.

Fig. 5 or abrading element detached from the r0- tating member.

Fig. 6 is a detail plan View of the pencil sharpener showing the rotating member and lllustrating the pencil holder disposed at an acute angle to the abrading face of the rotating member, whereby a pencil may be held correspondingly.

Referring to the drawings, 1 designates a suitable base, which may be fastened by screws or the like 2 toany suitable stationary support, such as that shown, and rising upwardly from the base isa standard 3.- Theupper part of the standard has a diskor circular shaped portion 4, which is provided with a screw-threaded socket 5. The

upper extremity of the standard terminates in a tubular holder 6, which is open at both ends. The base, the standard and its disk or circular shaped portion, and the tubular holder may be made in a single casting, though not necessarily, for it is obvious that they can be otherwise constructed.

A headed journal pin 7 is threaded; into the threaded socket 5, and. rotatably supported on its cylindrical part 8 adj acent the head of the pin is the hub portion 9 of the. rotating member 10. This rotating member 10 is in the form of a concave-convex disk, hence it is provided with an annular flange 11, which is provided with an annular shoulder 12. It is to be noted that the convex face of the disk or rotatingmember is substantially fiat near its center, and this surface extends radially for a considerable dis tance, then the surface annularly curves or bevels oif toward the flange. A grinding element'13, preferably a piece of sand or emeryspaper, thoughnot necessarily, is applied to the convex. face of the disk for grinding points upon pencils. A disk 14 is arranged upon the journal pin between the grinding element and the disk shaped portion of the standard and is provided with diametrically opposite pins 15. These pins penetrate through openings 16 of the grind ing element and into'the openings 17 of the rotating member or disk, so that the disk,

is a detailed v1ew ofthe grinding.

which is between the standard and the 'A suitable brass, steel, or other metal ring 20 of suitable diameter and any suitable thickness is forced over the grinding element, keeping the portions 19 between the cut away portions flat against the flange of the rotating member. This ring 20 is slipped far enough on the flange of the rotating member to contact with the annular shoulder, thereby preventing movement of the ring in one direction. Since the sand or emery surface of the grinding element faces outwardly, the ring binds sufficiently therewith to prevent its movement in the opposite direction. A suitable handle 21 is swiveled on the j ournalpin 22, whichis carried by the rotating member or disk, so that revoluble movement may be imparted to said member.

A sleeve 23 is fitted telescopically in the tubular holder 6, and is adapted to receive a pencil such as indicated at 24:, whereby a point may be ground on one end thereof. This sleeve 23 is provided with a plurality ,of longitudinally diametrically opposite slits 25 and 26 at its opposite ends, which cause pluralities ofspring tongues 27 and 28 to be formed at the opposite ends of the sleeve. By virtue of these spring tongues frictionally engaging with the pencil 24, the pencil is held in position. However, it is not held so firmly that it cannot be turned by hand, for it is the aim that the pencil should be manipulated revolubly as the grinding element rotates, so that the point of the pencil may be ground evenly throughout its length. The cylindrical tubular holder at the upper end of the standard is angular with relation to the standard and disposed at an acute angle to the grinding surface of the grinding element, so as to hold the pencil at an acute angle'to such surface, s0 as to form a tapered point on the end of the pencil. F urthermore, the tubular holder at the upper end of the standard is inclined slightly downwardly in order to facilitate the cutting away of the pencil since the rotating member moves in.

the direction indicated by the arrow a in Fig. 1. s a

A receptacle 29, which is in the form of a single casting, is secured by means of a screw 30 to the standard. -This receptacle is preferably semi-circular in form, though not necessarily, and is'secured to the standard concentrically'with the rotating memher. The wall 31 of the receptacle is provided with a semi-circular cut away portion 32 to receive the spacing disk between the grinding element and the disk of the standvof this character.

the handle of the rotating member may freely move, when imparting movement to the member. 1

The circular wear plate 14:, preferably,

though not necessarily, has the two pins 15 formed integrally therewith, and these pins 15, as previously stated, penetrate through the openings 17 of the rotating member or; disk, so that the wear plate may rotatejwith the disk or member, and also hold the grinding element or sand paper in place. In fact, the pins 15 are designed to be cast solid on the wear plate. 1

It will be noted that the holder is on the standard to so receive the pencil and hold it at an angle to the grinding or abrading surface that the pencil may be turned around at, will, so that the wood of the pencil may be. ground away evenly with relation to the lead regardless of whether the lead is eccen= tric or concentric relative to the wood. Also, the pencil may be moved longitudinally through the holder, so as to grind a point of any suitable length. Furthermore, suitable means have been afforded, to secure the abrading or grinding element to the rotating element or disk, consisting of the notches adjacent the edge of the element, so that it may be folded over the marginal periphery of the rotating member, in combination with a ring which is slipped over the grinding element to-clamp it in place. Furthermore, by means of the disk 14:, the grinding element is held spaced from the standard, so as to prevent injury of the same by contact; with the standard. Moreover, the receptacle is constructed in such wise and secured to the standard relative to the rotating'memher, as to receive the dust and dirt, which results in sharpening pencils with a grinder It will be noted that owing to the receptacle being cut away, and its particular construction and the manner of applying it to the standard, permits the rotating member to be easily detached from the standard, and the abrading or grinding element removed, without disturbing the receptacle. Furthermore, the cut-away por-' tion of the receptacle allows free movement of the handle of the rotatable member.

- The invention having been set forth, what is claimed as new and useful is:

In a pencil sharpener, the combination with a standard having a supporting base at its lower end, its upper end being pro- Vided with a detachable journal pin, of a circular rotatable member rotatably mounted upon said pin, an abrading element on the face of the member adjacent the standard, a disk plate having lateral pins passing through the element and into the member and being mounted upon the pin, thereby holding the central part of the abrading element closely in contact with the member and spacing the abrading element from the standard, the upper end of the standard carrying a holder at an acute angle to the abrading element and adapted to adjustably slidably receive a pencil to be sharpened, and a receptacle secured to the standard having one wall between the standard and the abrading element, and its other wall cut away to permit movement of a handle on the signature.

7 CHARLES E. STONE.