US1627243A - Pencil sharpener - Google Patents

Description

May 3,1927.' 1,627,243

C. O. KOWOL PENCIL SHARPENER Filed Feb, 1925 2 Sheets-Sheet 2 /Q TTOENEV Patented May 3, 1927.

PATENT :OFFICE onnnorpro KOWor.,1or ALioN, ILLINOIS.

PENCIL SHARPENER.

v Application led February My i invention relates tol rotaryy pencil Sharpeners, and specifically 'to adjustable `rotary pencil Sharpeners Y g The object of'my invention is to provlde a pencil sharpenei having a cutting discthat may be readily adjusted to sharpen pencils of very small or. lvery large diameter, so that a very fine point can be produced over a widevrangeof angles, that is, theangle at which thepencil is sharpened may be regulated to suit the particular kind of 'pencil being sharpened. Y A further object of my invention is to produce a pencil Sharpener having a movable chuck that will cause the pencil to rotate in the opposite direction to the cutting4 disc, thereby increasing its eiciency.

Other and further objects and advantages of my invention will be apparent from the specification, claims and drawings, in which:

Fig. 1 is a plan view. v j Fig. 2 is a section along the line 22. Fig. 3 is a section along the line 3-3. Fig. 4 is a section along the line 4-4. Fig. 5 is a section throughthe chuck. While there are a number of efficient pencil Sharpeners on the market, they are all so designed and built that only pencilsof a uniform size may be sharpened with a uniform bevel. As pencils vary in diameter, those of very large size, or very small size, are not adapted to be sharpened in the` conventional pencil Sharpeners. f

It is, also, desirable to vary the bevel with which a pencil is sharpened, so that a pencil having hard lead of small diameter may be sharpened with a very long bevel; while, on the other hand, a pencil having lead of large diameter and relatively soft is best sharpened with a short blunt bevel, and in order to overcome the deficiencies of the pencil Sharpeners now in use, I have devised a Sharpener in which pencilsV of alarge variety of sizes can be successfully sharpened, and

at the same time the bevel of the sharpened end can be changed at the will of the operator, so that the pencil ma be sharpened with a bevel best suited to its kind. f

The preferred embodiment of my invention consists of a main frame or housing 1, adapted to carry the entire mechanism` within and provide bearings, for the movable parts. A serrated disc 2 is provided with radially disposed cutting teeth 3. The disc is rigidly mounted upon the rotatable shaft 4, manually operated by means of the lbearings 12 and 13."

s, 1925-. serial No. 7,345.

crankarin 5, 'mounted in suitable bearings at 6 and 7. Y

A bevel cog 8 is rigidly attachedk to the `shaft 4 and meshes with fthe ring gear 9,

through which rotary motion,- is transmitted to the' bevel gear 10, rigidly mounted on l i' the splined shaft 11, provided with. suitable A slid-able pinion 14 smounted upon the splined shaft 11 and mesheswith a mating pinion 15, which is rigidly attached to a rotatable chuck 16. The pinions 14 and 15 are held in proper meshing relation by i Y means of the movable housing 17, which also provides bearings for the pinions 14 and 15.

The housing 17 is held in proper relation i with the cutting disc 2 by means of aslidable bearing 18, loosely mounted upon the shaft 19, disposed in the same vertical'plane with shaft 11, as shown in Fig. 3.

The bearing 7 is rotatably mounted in the Y shaft 20, which is integral with the ring gear 9, which may be rotated in its bearing 21, thus the crankshaft 4 may be rotated with the bearing 7.

The housing 1 is reinforced at 22 and longitudinally slotted to permit ay limited longitudinal movement of the crankshaft 4, as indicated by the dotted lines 23. Any degree of longitudinal movement of the crankp shaft desired may be maintained by screw-V ing in the set screw 24.

The crankshaft 4 is held against longitudinal movement by a collar. 25, held in place by the set screw 26.

'The pinion 14 is caused to rotate by means of'a key, not shown, engaging the key seat 27 on the splined shaft 11, thereby transmitting rotary motion to the pinion 15.

The chuck shown in cross section in Fig. 4 vconsists of two movable heldl together by means of helical springs 30 and may, also, be opened and closed by means of the rotation of an eccentric 31, within a hollow housing, not shown but injaws 28 and 29,

dicated by the dotted lines; hence, a pencil i may be tightly gripped by rotating the eccentric as above described. v v Y When operating my improved Vpencil Sharpener, the pencil isinserted through the jaws of the chuck, as indicated at 32, and 'i Y' I the chuck housingk 17 may be moved longitudinally along the shafts 11 and 19 to the desired position. The pencil 82-is then put into the chuck and `made fast, when the crankmis rotated clockwise and the cutting lloA ' the pencil, being rotated also in clockwise.

teeth offthe 4disc 2V,coritacting,A With the point of the pencil,inove in one'dire'ction; While direction increases the cuttingelciency, because the tivo elements while rotating in clockwise direction, rotate in planes at rightangles` to each other.

.It is obvious that by rotating the crank- `its Vmodesof operationWhatiI claim as :new

and. useful: and desire'Y to` secure by Letters Patent is::

Awpencih Sharpener of thefclass described.

comprising, a housing:` adapted to support bearings for: the 'movable' partsV of: said. pen- -cill Sharpener; `a rotatable chuck axially movable andviadaptedftogrip andiholdV a pencil. ata predetermined angle to the plane of a rotatable cutting disc, means for adjusting tlieplane of rotation of said rotatable cutting disc at -dilferent angles rela,- tively to the said rotatable chuck Without changing: thewrelation of the teeth of the driven and *driving bevelV gears, said chuck hav-ing movable -j aivsrl normally held together by means ot' helical" springs, Imeans -for holding said cutting discrinadjusted positions,v

and means for rotatinga said ich nel? and f said cutting disc.

In Witness whereof In haver' hereunto afiiXed my signature, 3tliisl day ofJanuary, 1926..

CARL enrol KoWon,

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