US1088021A - Pencil-sharpener. - Google Patents

Description

\F. E. HINBR.

PENOIL SHARPENER. APPLICATION FILED SEPT. 27, 1912.

1 ,088,021 Patented Feb. 24,1914.

FRANK E. HINER, F ROCKFORD, ILLINOIS.

PENGIL-SHARPENER.

Specification of Letters Patent.

Patented Feb. 24, 1914.

Application filed September 27, 1 912. Serial No. 722,684.

To all whom it may concern Be it known that I, FRANK E. HINER, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Pencil-Sharpeners, of which the following is a specification.

The object of this invention is to construct an eflicient pencil sharpener that is reliable in its operation, simple to operate, and thoroughly adjustable.

A further object is to provide a suitable drive between the cutter driving means and the pencil chuck, for rotating said chuck.

A further object is to form a rotating cutter having a plurality of tangentially disposed knives formed integrally therewith, and adjustable means for varying the depth of the out of said cutter.

A further object is to construct the pencil holder or rest thoroughly adjustable as to the depth of the cut and automatically adjustable when. there is too great a cut or strain upon the pencil.

In the accompanying drawings: Figure 1 is a front view of my pencil sharpener, a portion of the oil-holder being bro-ken away. Fig. 2 is a section on the line 2-2 of Fig. 4, the cutter partly broken away. Fig. 3 is a fragmentary section on the line 33 of Fig. 1. Fig. 4 is a vertical section on the line 4-4 of Fig. 1, the cutter shown in elevation. Fig. 5 is a fragmentary section taken on the line 5-5 of Fig. 2. Fig. 6 is a fragmentary section taken on the line 66 of Fig 5, the pencil-chuck shown in elevation. Fig. 7 is a section on line 77 of Fig. 5, with the pencil removed. Fig. 8 is a vertical detail section taken on the line 88 of Fig. 2.

The frame 8 of the pencil sharpener can be suitably supported, and has a bearing 9 which supports the shaft 10, said shaft having a spiral gear formed on its portion lying within the bearing 9, and a crank 11 rigidly secured to its outer end. A circular diskcutter 12 is carried by shaft 10, and held from rotation thereon, the cutter being formed with a plurality of tangentially arranged blades 13, having their cutting edges all lying in the same plane, and olfset from the disk-cutter. This disk-cutter is held yieldingly by the coiled spring 14, against bearing studs 16 and 17, and the adjustingscrew 18 held in stud 15, Fig. 3, thus forming a three-point bearing for the face of the disk cutter, said adjusting screw being adapted to adjust the position of the diskcutter laterally, as the cutting-edges of the blades are worn down; and stud 16 having an oil hole leading to an oil-cup 19, for the purpose of oiling the peripheral bearing face of said disk-cutter, which face is in contact with said stud bearing points.

The pencil-carrier 20 is pivotally supported by the pin 21, and is adapted to form areceptacle fora pencil 22, the pencil resting on the slightly beveled slot 32, and being carried at an angle to the vertical, so that when the disk-cutter is revolved, the knives thereon having a vertical stroke, they will cut the end of the pencil to a suitable taper, as shown in Fig. 5. An adjusting-screw 23, held at the lower end of the pencil-carrier 20, and in engagement with the frame 8, is adapted to pivot said pencil-carrier, in order to properly adjust it in relation to the cutting knives. A coiled spring 33, Fig. 3, supported between the pencil-carrier 20 and the arch 34, is adapted to hold said pencilcarrier yieldingly in its operative position,

and when the pressure of the knives is too great on the pencil, or the pencil forced too quickly into engagement with the knives, the spring allows the pencil-carrier to give sufliciently to overco-methis undue strain.

Journaled in the upperend of the pencilcarrier, is the pencil-chuck 24,. having a central opening to receive the pencil, a slightly beveled gear formed at its lower end, and the upper end formed with a head adapted to carry gripping or holding means, comprising a coiled spring 25, which is bent at 26, Fig. 7, so that its side will be substantially parallel, and form a better gripping position. The intermediate shaft 27 is jour' naled in bearing 28 formed with the body 8, has a slightly beveled gear at its upper end meshing with the gear of the chuck 24, and a spiral gear formed at its lower end meshing with the spiral gear of shaft 10, said intermediate shaft being held in position by the screw 29. A casing 30 incloses the disk-cutter, and forms a receptacle 31 for the shavings dropping from a pencil.

The operation of the pencil sharpener is as follows: A pencil is inserted through the pencil-chuck 24 and into the carrier 20. The crank 11 is then rotated by hand, and through the medium of the shaft 27, said pencil-chuck is rotated, thereby rotating the pencil through means of the coiled spring 26. As the shaft 10 rotates, the disk-cutter rotates also, the knives coming with a shearing stroke into contact with the end of the pencil, and by continuing this rotation of the crank, the pencil will soon have the required sharpened end. If the point on the pencil is not sharp enough, the pencil-carrier can be brought closer to the knives by adjusting the screw 23.

I claim as my invention:

1. A pencil sharpener comprising a penoil-carrier, a pencil gripping chuck rotatably mounted thereon and having a pencil'rest, a rotatable disk disposed spaced from the pencil rest, a plurality of knives carried by said disk with their cutting edges lying in a plane spaced from the plane of rotation of the disk, said knives adapted to be held in cutting relation with said pencil rest, means for guiding said disk to carry said knives in said cutting relation, comprising, three radially spaced bearing points in contact with a face of said disk and held fixed from radial displacement, means for holding the disk yieldingly against said bearing points, and means for rotating the pencil chuck and 1 disk.

2. A pencil sharpener comprising a penoil-carrier, a pencil gripping chuck rota tably mountedtherein, a rotatable disk, a plurality of knives disposed thereon, said knives adapted to be held in cutting relation with a pencil carried by said pencil- 3 carrier, a three-point bearing for the face of said disk, one of said points being adjustable and adapted to vary the lateral position of the disk toward or away from said pencil carrier, and means for rotating the pencil chuck and disk.

3. A pencil sharpener comprising a frame, a pencil-carrier mounted thereon, a pencil gripping chuck rotatably mounted in said pencil-carrier, a rotatable disk carried by the frame, and having a plurality of knives disposed thereon, radially spaced bearing points contacting the face of said disk, a spring holding said disk yieldingly in contact with said bearing points, one of said bearing points being adjustable to vary the position of the rotatable disk toward and away from said pencil-carrier, and means for rotating the pencil chuck and disk.

4. A pencil sharpener comprising a frame, a pencil-carrier mounted thereon, a rotatable disk having a plurality of cutting knives and a continuous peripheral face forming a bearing face, spaced bearing points contacting said bearing face, a spring holding said disk yieldingly in contact with said bearing points and in cutting relation with a pencil carried by said pencil-carrier, an oil receptacle communicating through one of said bearing points with said continuous face, and means for rotating the disk.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

FRANK E. HINER.

Witnesses:

BYRON E. Eas'rwoon, ALICE R. SHovn.

Copies oi this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. C. I

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