US836094A - Pencil-sharpener. - Google Patents

Description

:PATENTED NOV. 20, 1906.

- J. H. 000K,

PENCIL SHARPENER.

APPLIOAT ION FILED I EB.2. 1906.

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Specification of Letters Patent.

Patented. Nov. 20, 1986.

Applicationliled February 2, 1906. Serial No. 299.132.

Iio ttZZ whom it may concern:

Be it known that 1, JOHN H. Coon, a citizen of the United States of America, residing at Brooklyn, in the county of Kings and State of New York, have invented new and useful Improvements in PenciLSharpeners, of which the following is a-speoification.

This invention relates to the class of peneil-sharpener's; and it has for its object to provide a structure by which the pencil can be quickly and accurately sharpened.

The invention consists in providing'a piece of sandpaper or other flexible abrasive material which can be readily attached to and detached from a disk adapted for rotation at a com aratively high speed, and a clamp for readi y securing the sandpaper or other abrasive material to the disk, and suitable gearing for rotating the pencil-clamp in an opposite direction to the sandpaper-disk.

In the drawings forming part of this application, Figure 1 is a perspective viewoi my improvedpencil-sharpener. Fig. 2 is a vertical section through the pencil-clamp, beveled gears, and sandpaper-disk, and adjacent parts, while Fig. 3 is a perspective view of the receptacle for receiving waste material.

Referring to the drawings in detail, a designates the main upright casting forreceiving the operative parts of the device, which is integral with the base portion 5.

c designates a shaft which is mounted for rotation in the boss or hub d of the upright piece a. Secured to the outer end of this shaft 0 is a crank 6, while on the inner end is a combined beveled and spur-gear wheel f, the the spur-teeth being on the pernihcry of the wheel and the beveled teeth being on the inner face thereof, as shown.

Meshing with the spur-tceth is a pinion h,

secured to a stud or shaft in the standard a and carrying at its outer end a disk i, of metal or other suit able material. The outer rim of this disk has a concave groove j therein for the purpose of receiving'tlndivided spring clamping-ring /r for the purpose of detachably securing a piece of sandpaper m or other similar flexible abrasivematerial, although 1 preferably use sandpaper. When apiece of the same bccmnes worn, another piece may be readily substituted therefor by bending the edges of thcpaper into the groove j and snapping the clamping-ring 7c thereon, as clearly shown in Figs. 1 and 2.

the waste products.

The standard a has an arm portion a at its top that is substantially at right angles to the upright portion, as shown in Fig. 2, and carries in the outer end thereofa bearing-piecen, to which the beveled gear 0 is secured or maybe made integral therewith. This bearing-piece n is held in place in the bent arm by means of a screw p, engaging a groove r, as shown. Located concentric with the axis of the bearing-piece n and beveled.

gear 0 is the spring pencil-clamp r, which is rigidly secured to the parts 1i and o. The armportion a is inclined downward, so that the axis of the pencil-clamp will intersect the center of the rotating disk 41, which carries the sandpaper:

it will be readily seen that upon the rotation of the crank e the pencil s will be rotated at a comparatively high speed in one direction, while the sandpaper-disk i will be rotated at a comparatively high speed in the opposite direction, thus insuring a relatively,

great movement between the pencil and sandpaper. The wood of the pencil is therefore quickly worn away and the same brought to a sharp point-in a short time.

It is to be understood that by the placing of the pencil in the clamp the same is gradually.

pushed downward by hand as the wood is cut away until the desired degree of sharpness is imparted to the pencil.

.Located immediately below the sandpaper-disk 'i and inclosing about one-half of the stone is a removable receptacle t for receiving This receptacle has secured to the lower side thereof a foot-piecc a, having a slot "a for engaging a screw to on the base of the device, thus permitting the receptacle to be readily removed and the waste products emptied.

Embraced Within the scope of my invention instead of employing the clamping ring 7i: I may simply emboss or crease the edge of the abradingdisk, so. thatthe same can be pushed over the edge of the disk t, and thus be held in place in the groove without the use of the clamping-ring.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-

1. In a device of the class described, a basepiece, an upright integral therewith and having its top portion bent at an angle to the upright, a disk revolubly mounted in the upto the face and edge of the disk, said means engaging the roove thereof, a pencil-clamp located in the ent portion of the upright and above the axis of the disk, and means for r0- tating the pencil-clamp and disk.

2. Inla device of the class described, a disk ha'ving'a groove in the outer edge thereof, a ring for engaging said groove and detachablysecuring flexible abrasive material there- 7 to, an upright having an arm substantially 'at'right angles thereto and in the same vertical plane as the upright, a rotatable bear ng-piece in said arm and above the axis of the disk, a pencil-clamp secured to the bearing-piece, and. means for rotating the pencilclamp and disk in opposite directions, the axis of saidpen'cil-clamp and disk intersecting, and means for operatively connecting the disk and rotatable bearing-piece.

' 3. In a device of the class described, an upright, an integral armsubstantially at right angles to the same, a driving-shaft in said upright, an element having beveland spur teeth thereon, a beveled gear secured in the bent arm and meshing with the bevelteeth of said element, a pencil-clamp mounted in said bevel-gear, a pinion meshing with the spur-gear of said element and carrying a disk, said disk having a groove in its outer edge, a spring-clamp'adapted to engage said groove and detachably. secure a piece of ing beveled and spur teeth'thereon, the spur- L teeth engaging said pinion and the beveled teeth engaging the beveled gear, said beveled gear carrying the pencil-holder, the axis of said pencil-holder intersecting the surface of the abrading element carried by the disk as described.

5. Ina pencil-sharpener, a gear having bevel and spur teeth thereon and suitable means for supporting the same, a disk having a circumferential groove and carrying abrasive material, a pencil-holder, a pinion axially arranged with relation to the disk and meshing with the bevel-teeth of said gear, a

beveled gear meshing with the bevel-tenth of said gear and carrying the pencil-holder,

said pencil-holder adapted for rotation with said bevel-gear, and means for detachably securing the abrasive material in the groove.

' JOHN H.-ooo'K.'

Witnesses 7 j A. E. NAYLOR, B. MEYER.

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