US1603540A - Crayon sharpener - Google Patents

Description

Oct. 19,1926. 1,603,540

J. HOLTZMAN CRAYON SHARPENER Filed MW. 6' 192g 9 ll INVENTOR ATTORNEY 1/ /0' 19 I i6 9 l2 A v I Patented @et. 19, i i

EDEN HOLTZMl-ill, O1" NEW YORK,

HALF T0 WARREN E. JJILLIS, OF NE'W YORK, N. Y.

CRAION SHABPENER.

Application filed November 6, 192-2.

This invention relates to iinprm'emeuts in tailors crayon sharpencrs and has as its object to provide an implement that will produce a. line edge on the crayon its entire lei'igrth and on either or both edges as desired;

Another purpose is to provide an implement that may be conveniently used in conuection with a stand or the cutting elements held in the hand as may be preferred.

it further aim is inthe provision of a de vice which may be readily freed from the debris or accumulations produced in .apinn the sides of the crayon.

These objects are attained by the novel construction and combination of parts hereinafter described and shown in the ac rompanying drawing, forming a material part of this disclosure, and in which lligrure 1 is a perspective view showing),' an

embodiment of the sharpener as mounted in a stand.

Figure 2 is atransverse sectional view taken on line 22 of Figure 1.

Figure 3 is a side elevational view of one of he cutters, looking from the toothed side,

F igure l is a view showing the use of the device without the holder.

The material to be operated. upon, while generally known as chalk, crayon, is in reality not chalk that is carbonate of lime, at all, but a species of talc or soapstone, either in its natural state or ground and blended with an adhesive as a gum or resin and then molded to present an oblong rectangular plate having sharp angular edges along the center of each of its longer sides.

The nature of the material, whether nat ural or artificial, is slightly greasy or unctuous to the touch and when shaved, as with a knife, the cuttings have a tendency to pack and adhere tenaciously to the cutter, requiring considerable force to dislodge and while friable, does not so readily assume a powdered form as does chalk.

Thus it is that files or like serrated cutters, irrespective of the shape or angulzurity of their teeth, soon become clogged and rendered relatively inoperative until the same are cleansed of their accumulations by some form of abradant, as for instance a stiff brush.

While the so called crayon is not the subject of the invention, the foregoing facts Serial; l\To-. 599,406.

serve to explain one of the more specific purposes of the implement and further serve to indicate the indifferent success attained by alleged prior improvements in the art.

l'leferring; to the drawing, one of a pair of essentially like plates is designated by the numeral 5 and the mating; plate 6, the backs or outer surfaces of which are smooth, straight and level.

The inner or adjacent sides of the plates contain semi-circular, longitudinal recesses 7 and 8 approximately at their centers and are bevelled therebelow so that when the rhainfercd surfaces 9 and 10 are in. contact, the opposed surfaces above the recesses present an included angle of approximately twenty-two degrees.

One of the plates, as 5, has fixed in its bevelled surface a pair of pins 11 and the mating plate 6 is provided with corresponding registering holes 12 loosely receptive of the pins, as best shown in Figure 2.

The facing, upper portions of the plates, above the recesses 7 and 8,-have a plurality of transversely angular serrations 18 and 14: respectively, said serrations being disposed in opposite directions and each tooth bevelied sharply on one side and obtusely on the other to present cutting; edges GX- tend' from the upper edge of the plate to the recess therein. 7

A pair of such plates, engaged by the pins may be held in one hand and the crayon in the other, one or two strokes serving to pro duce a desirable edge on the crayon, after which the plates may be separated and struck a sudden blow. face down, thus frecing' the adherent shavings, or a stiff brush may be passed lengthwise of the teeth to accomplish like results.

A holder or stand, as shown in Figure 1. may be used in connection with the cutters, the same consisting of a unitary, open metal box, having a closed bottom wall 16, sides 17 and ends 18.

A pair of opposed angular bosses 19 are formed to extend upward from the bottom wall 16, and in the adjacent faces of these bosses are angular sockets 2O suited to receive the pair of cutters and maintain them inoperative position, but in nowise preventing their ready removal for cleansing.

From the foregoing it will be seen that a simple device for this purpose has been disclosed in the preferred form of its embodiment, but it is not desired to restrict the de tails, it being apparent that minor changes,

not involving the exercise of invention, may be made Without conflicting with the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. A crayon sharpener comprising a pair of plates having transverse serrations over a portion of their adjacent surfaces, said plates being disposed at an angle to one another, pins extending from the surface of the remaining),- portion of one of said plates engageable in openings formed in the mating plate, and a holder having sockets suited to reinovably engage said plates in operative position.

2. A crayon sharpener comprising a pair of oblong plates having central longitudinal recesses in their adjacent sides said plates being gradually reduced in thickness from the said recesses to one edge, transverse teeth "formed obliquely from the said recesses to the opposite edge, pins extending from the reduced surface of one of said plates cugageable in openings formed in the mating plate, and a holder having sockets suited to reinovably engage said plates in operative position.

3. A crayon sharpener comprising a pair of oblong plates each having a central longitudinal recess in its adjacent side, each said plate being gradually reduced in thickness from the said recess to one edge, transverse teeth formed obliquely from the said recess to the opposite edge, pins extending TflOlll the reduced surface of one of said plates engageable in openings :t'ornied in the mating plate, and a relatively heavy receptacle, and opposed sockets fixed within said. receptacle receptive oi? the ends of said paired and registered plates, said plates extending above said sockets for convenience in operation, and removal.

Signed at New York, in the county of New York-and State of New York, this 24th. day of October, A. D. 1922.

JOHN HOLTZB'U N.

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