US2591756A - Pencil sharpener - Google Patents

Description

April 8, 1952 G, E. wlMMER y PENCIL SHARPENER Filed Jan. 2e, 1943 2 SHEETS--SHEET- l April 8, 1952 G. E. WIMMERr PENCIL SHARPENER SHEETS- SHEET 2 Filed Jan. 26. 1948 2320672322 iefz Mak/eww y AKM M Patented Apr. 8, 1952 UNITED STATES PATENT OFFICE PENCIL SHARPENER Glen E. Wimmer, Chicago, Ill.

Application January 26, 1948, Serial No. 4,267

claims. (ol. 12o-96) I illustrate my invention more or less diagrammatically in the accompanying drawings wherein:

Figure 1 is an end elevation;

Figure 2 is a section on the ure 1;

`Figure 3 is a section on the line 3-3 of Figure 2;

Figure 4 is an elevation of the cutter support shown in Figure 2;

Figure 5 is a plan View of the structure shown in Figure 4; l

Figure 6 is a section, on an enlarged scale, on the line 6--6 of Figure 5;

Figure 7 is a section on the line 1--1 of Figure 6;

Figure 8 is a side elevation, on an enlarged scale, of one of the cutters;

Figure 9 is a section on ure 8;

Figure 10 is a section on Figure 9;

Figure 1l is a side elevation of a different form of cutter;

Figure l2 is a section, on an enlarged scale, of another form of cutter;

the une 9-9 of Figthe line III-I0 of Figure 13 is an illustration of a variant form of roller support; f

Figure 14 is a section on the line |4|4 of Figure 13;

Figure 15 is a section, on an enlarged scale, on

une 2 2 of Fig- Y Like parts are indicated by like symbols throughout the specification and drawings.

Referring to the drawings, I generally indicates any suitable base which maybe mounted on or secured to any suitable support, such as the top of a table or desk. It may advantageously be made of a stam-ping of sheet metal. Upwardly extending from it I illustrate a pedestal 2, shown as formed of sheet metalfand having an integral upper expansion or hub, generally indicated as 3, and having a circumferential flange 4 with circumferentially spaced notches or gaps 5. Mountenlargement ed to be secured to the hub 3 I illustrate a housing shown as formed of two parts, 6 and 1, secured to each other as by opposed flanges 8. In general alignment with the center of the hub 3, the part 1 is shown as having a tubular inward extension 9 which serves as a centering member or support for the below ldescribed cutter holding rotor. The member 3 is provided with prongs I0 for interiitting with the notches in the shell member 6, whereby the composite housing member formed of the parts 6 and 1 can be applied to and locked in relation to the offset hub 3. The hub 3, and its attened part 4, receivean internal gear plate or ring I2 which may be held in place by oiset lugsor parts I3 of the hub portion 4.

The rotor for rotating the `below described cutters includes a pin or shaft I4 having an enlargement I5 and a reduced handle-receiving end portion I6. The portion I4 is surrounded by a bearingsleeve I1 secured to the hub portion 3 with a press fit, as at I8. The handle VI9 serves to rotate the shaft I4 within thebearing sleeve I1 and thus to rotate the yoke portion shown as including two pieces of metal or suitable material 20, 2| positioned back to back, as shown in Figure 5, and having outwardly extending end lugs 22 at one end and 23 at the other.

The parts 25 and `2I can be riveted together, or otherwise suitably secured. Each of the pieces 20. 2| has a pencil receiving opening 24 with an end enlargement25. Each pair of lugs 22, 23 is apertured, as at 2B, to receive the ends of bearing pins 21 which may be 28. The yoke structure, which includes the parts 2D and 2|, is shown as secured to the shaft enlargement I5 as follows: The lugs 23 areformed with circular, inner, cut-away edges 23a which seat in a circumferential recess or slot |5a in the enlargement I5. The members 20 and 2| have central locking lugs 3|] which enter a transverse, diametrically extending slot 3| in the end of the I5. When the parts are intertted in the position in which they are shown in Figures 6 and '7, the membersl and 2| may then be bolted, welded or otherwise secured together. The result is a unitary structure which may be rotated by rotation of the crank |9- andthe terminal handle I 9a.

Mounted for rotation on the bearing pins 21 are cutters, each of which includes a hollow sleeve or tube 35. Mountedon each such tube are a plurality of disks 36 which may be stamped or otherwise formed, for example, from sheet metal.

, Each such disk has appropriate teeth 31. A sepasuitably headed, as at with the teeth 31 arranged in any suitable pattern. It may, for example, be advantageous to spiral them, as shown in Figure 8. The disk 36 may be locked in position, by press-itting or otherwise. It will be understood that a variety of manufacturing methods may be employed. For example, the hollow tube 35 may be initially headed or oiset at one end, as at 4|. The disks 36, the spacer 40, and the pinion disk 38 may be aligned on the tube 35, and, thereafter, the tube may be headed as at 42; or the tube may be outwardly expanded by any suitable tool, in order to insure a press-nt when the parts are properly arranged. It will be understood that any other suitable aligning and positioning means, not herein shown, may be employed.

" When theparts are assembled, the pinion teeth 39 mesh with the internal teeth of the gear ring I2. Thus the result of a rotation of the crank I9 is to`move the rollers about the end of a pencil inserted through the sleeve 9 and into the space indicated at 24 in Figure 4. At the same time, there is a positive rotation of the two cutters, whereby the pencil is sharpened.

With reference to the form of Figure 12, I illustrate a'variant arrangement of cutter teeth.Y The tube 35 is employed, and headed at each end, as at 4| and 42, but the individual cutter disks 5D have'tee'th 5I with oppositely extending cutting edges 52. Thus a reversible cutter is provided. It will be understood that the teeth may be spiraled, as shown in Figure 8, or otherwise arranged. In Figure'll, I illustrate them as out of spiralv arrangement. Y'

Referring to the form of Figures 13, 14 and 15, I illustrate a variant type of cutter supporting yoke. The shaft 55, with its enlargement 56, re-

ceive's an end plate or disk 51, which may be press-tted on or otherwise secured to the central projection 56a. Extending from the end plate, and lying in a plane perpendicular to it, is an intermediate plate 58 having lugs 59 at one end and 69 at the other. The lugs 59 extend through suitable apertures in the disk 51 and are suitably upset or otherwise secured. The plate alsohas a small key 6I extending into a suitable slot 62 in the enlargement 56a. At the opposite end or edge of the plate S is a bearing sleeve 63 which may be Vpress-fitted or otherwise secured in orto the yoke 64, having side arms 65 provided vvwith suitable bearing pin receiving apertures 66.

The arms 65` are inclined, `just as are the arms 22 of the form of Figure 5, whereby the axes of the bearing pins, not actually shown in Figure 13, are

inclined apart at the proper angle to provide the desired cutting cone or formation for cutting or sharpening the end of a pencil. The plate 58 is recessed, as at 58a, to receive the end of the pencil extending through the sleeve 63.

It will be understood that the yoke of Figure 14 kmay be used with the housing shown in Figure 2,

in which case the bearing sleeve 63 extends either intowor in alignment with the tube 9. It Will be understood, also, that the tube 9 may be omitted, leaving` simply an aperture. In that event the sleeve `63 may'extend `through such aperture. It

will be understood that the disk 51 may be bent toY align its apertures 51a. with the apertures 66 of.' the end yoke.

Figures 16 to 19, inclusive, illustrate a variant `form of yoke, which may be formed or struck out ofa'single piece. It includes a body portion 15, having outwardly struck, offset yoke arms 16 perforated vas at 11to receivegsuitable bearing pins. The body 15 is cut away, as at 18, to receive the pencil end. At the opposite end, the member 15 has shorter yoke arms 19, each with an aperture for a bearing pin, not shown. The yoke thus formed may be suitably secured to the enlargement 82 of the shaft 6l. It may, for example, be soldered.

It will be realized that, whereas, I have described and illustrated a, practical and operative device, nevertheless many changes may be made in the size, shape, number and disposition of parts without departing from the spirit of my invention. I therefore wish my description and drawings to be taken as in a broad sense illustrative or diagrammatic, rather than as limiting me to my precise showing.

For example, in Figure 20, I illustrate a variant form in which, instead of the hollow tubular core 35, as shown, for example, in Figure 9, I employ a solid core l 99 on which the individual disks 36a are mounted. The individual disks are pressfitted on the core 199.

I claim: y

l. In a pencil Sharpener which includes a base, a support extending upwardly from said base and a housing removably mounted on the support, a rotor pivoted on said base, said rotor including a shaft portion pivoted on'said support and a handle at one end thereof, and a pair of roller receiving yokes secured back to back to each other and secured to the end of said shaft portion opposite to said handle.

2. The structure of claim l characterized in that the shaft portion is notched to receive adjacent ends of the roller receiving yokes.

3. The structure of claim 1 characterized in that the roller receiving yokes are of sheet metal and have axially extending plane portions secured to each other.

4. The structure of claim 1 characterized in that the roller receiving yokes have axially extending recesses formed and adapted to receive the end of a pencil, the yokes being secured to each other along opposite sides of said recesses.

5. The structure of claim 1 characterized in that the roller receiving yokes have axially extending recesses formed and adapted to receive the end of avpencil, the yokes being secured to each other along opposite sides of said recesses. the housing having a pencil guiding sleeve aligned with said recesses.

GLEN E. WIMMER.

REFERENCES CTEB The following references are of record-in the iile of this patent:

UNITED STATES PATENTS 49,918 Switzerland Oct. 23, 1909

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