US625878A - Crayon-sharpener - Google Patents

Description

No. 625,818. Patented May 30, l89 9.

.1. J. FRASER.

CBAYON SHARPENEB.

(Application filed Feb. 20, 1899.)

(No Model.)

THE Mums Farms 00., PMOTO-L!TNQ., wsumu'rcn n c UNITED STATES PATENT OFFIC JOHN J. FRASER, OF ROSLINDALE, MASSACHUSETTS.

CRAYON-SHARPENER.

SPECIFICATION forming part of Letters Patent No. 625,878, dated May 30, 1899.

Application filed February 20, 1899. I Serial No. 706,255. (No model.)

To aZZ whom it may concern:

Be it known that I, JOHN J. FRASER, of

'or sharp edge particularly adapted for drawing and marking.

The invention consists in various features of construction to be hereinafter described, and pointed out in the claims. 7

In the drawings, Figure 1 is a perspective of a crayon-sharpener, illustrating one embodiment of my invention; Fig. 2, a vertical section thereof, taken longitudinally of the crayon-receiving groove or channel indicated by the line as m; Fig. 3, a cross-sectional detail on dotted lineyy, Fig. 2, showing the relative arrangement of the sharpening-knives and the means for carrying the same; Fig. 4, an under side View of the knifecarrying plates, showing the knife in position; and Fig. 5, an enlarged cross-sectional detail of a portion of Fig. 3.

Referring to the drawings, in the embodiment of my invention there shown for illus-- tration, A is a suitable base or support adapted to carry the various parts of the device. Preferably this base or support A will be shapedas, for instance, like Fig. 1'to provide a receptacle a for the fine particles of crayon that are removed by the action of the knives, together with one or more suitable openings, as a a offering convenient access.

to the receptacle (1, and through one or both of which the particles referred to may be removed at will.

The upper end of the support A forfcon venience is shown as beveled to form suitable supports for the two plates 1) b, which latter are preferably made adjustable transversely on the inclined face of the support-as, for in stance, by the screws 19, passing through slots b in the plateswhereby the separation of the plates one from the other may be varied to accommodate crayons of varying sizes or of said depending walls.

to fix the edge to be produced by the action of the knives upon the crayon. These carrier-plates b b are preferably of thin material, (I having found resilient metal to be the best,) and the inner or adjacent edges of these plates are shown as turned downwardly at a comparatively abrupt angle to produce the depending wings or walls 12 Figs. 3 and 4C. These walls being without support along their lower edges are more or less resilient or yielding, so as to permit them to spread or recede more or less under the action of the chalk, as will be described.

Intermediate the length of the two plates 1) b the depending walls b thereof are shown as provided with apertures, through which protrude the sharpening knives or blades 0 0. These blades are secured in suitable manner to the plates 19 b, they being herein shown as secured to the beveled supports h, formed upon or at the inner faces of the walls 12 that is, the faces at the backs or inner sides For the best results these blades should be adjustably secured in position, as by the screwsc passing through slots 0 in the blades in order that the positions of the blades may be adjusted not only to vary the depth of cut in acting upon the crayon, but also to compensate for sharpen- 'ing of the blades, (to. The angle of these blades will be such as to produce the best re-- sults, I having found the angle here shown to be about right for most kinds of crayon.

As will be seen by reference to Fig. 3, the depending walls 12 are converged somewhat toward each other from their upper to their lower edges, as also the blades 0, so that with the device in the position Fig. 1, resting upon a table or counter, a piece of chalk if drawn downwardly through the channel formed between the converging walls I) will be acted upon by the blades or cutters a, protruding through the walls, and sharpened. The channel or trough between the walls I) is shown as provided with abottom a formed, preferably, by a triangular member'cast with and secured to the support A. This bottom a has a top surface of a character such that it serves to support the edge of the crayon as the latter is drawn' downwardly through the channel or trough. The thin edge of the crayon thus finds a sufficient support to pro vent easy crumbling, and said support also prevents the crayon from being inserted too deeply into the channel or trough and the consequent removal of too much of the crayon. After the required edge has been formed the bottom a prevents the removal of any further material by repeating the operation.

Frequently the pieces of crayon or chalk vary as to thickness, and if the channel formed between the cutter-walls were fixed and unyielding it would be difficult and at times impossible conveniently to sharpen these varying thicknesses of crayon. To provide for these, I have made the walls b yielding or movable, as described, to enable them to recede somewhat to accommodate auto matically the thicker pieces of crayon pressed into the channel during the cutting operation, thus to permit the edge of the chalk or crayon always to be pressed downwardly until it finds a support upon the bottom a The correct edge is thus insured regardless of the thickness of the crayon.

The beveled portions N, that carry the knives c, areshown as dropped somewhat below the main portions of the carrying-plates I), (see Fig. 3,) so as to permit free yielding movement of the walls 12 for the purpose described.

At the lower end of the inclined channel referred to I have provided a wiper, (shown as in the form of a notched piece of felt 61,) attached in suitable manner to the support A and which serves to clean the sharpened edge of the crayon as it emerges from the channel. Obviously instead of the felt (l I may employ any other suitable material or cleaning device capable of cleaning or smoothing the sharpened edge as it emerges from the channel.

Referring to Fig. 4, in the preferred construction. the aperture through which the cutter-blade of each. wall protrudes is closed at both top and bottom, at the top by the flat portion of the plate-like carrier and at the bottom by the bridge portion 6 whereby the movement of the wall at one side of the knife is communicated more or less to the portion at the opposite side thereofthat is, notwithstanding the aperture the wall throughout its length will respond or move substantially as though iinperforate throughout. Furthermore, by providing the yielding walls to carry the cutters-in other words, by providing yielding supports for the cutters-the latter and the walls will yield more or less during the cutting action, and thereby prevent the crumbling or breaking away of the edge of the crayon to the extent that wouldresult if the said walls and the cutters were absolutely rigid'and unyielding. WVith the rigid and unyielding walls the crayon would stick in the channel between the walls and cause much difficulty, which is entirely obviated by the yieldingconstruction described.

At the lower end of the channel I have provided an aperture 0, through which the material removed by the cutters may drop into a receptacle provided therefor.

Having fully described my invention, what I claim, and desire to secure by Letters Patout, is

1. A device of the class described, presenting a flaring channel or trough in and along which the crayon to be sharpened is drawn, and one or more cutters yieldingly arranged at the side of the said channel or trough and extending in a direction from the bottom toward the top thereof, to operate, substantially as described.

2. A device of the classdescribed constructed to present a flaring trough having a yielding or resilient movable side wall, and one or more cutters to act upon the crayon as it is drawn in and along the said channel or trough.

3. A device of the class described constructed to present an inclined flaring trough or channel having one or more yielding movable side walls, and means carried by said movable side wall or walls to cut or sharpen the crayon as it is drawn in and along said trough or channel, substantially as described.

4. A crayon-sharpener consisting of a base containing a receptacle, means thereon forming a flaring trough or channel in and along which the crayon is drawn, and one or more cutters yieldingly arranged at the side of said trough or channel to sharpen the crayon drawn past the same, as described.

5. In a device of the class described, the combination with a suitable support, of carrier-plates provided with depending wings or walls made freely yielding, and a cutter or cutters operating in conjunction with said walls, as described.

6. A support, the carrier-plates provided with depending resilient and freely-yielding walls adjustable one toward the other, and a cutter or cutters, to operate as described.

7. In a crayon-sharpener, the combination with a trough or channel in and along which the crayon is drawn, one or more yielding side walls for said trough or channel, and cutters or blades carried thereby and movable therewith, and means adjacent the end of said trough or channel to clean the edge of the crayon emerging therefrom, as described.

8. In a crayon-sharpener, the combination with a support presenting a channel or trough having one or more yielding side walls, and a stationary unyielding bottom support, and one or more cutters, of a wiper arranged at or adjacent the end of said trough or channel to clean the edge of a crayon emerging there from.

9. The combination with a support, of the plates adj ustably mounted thereon and provided with depending yielding walls forming between them a flaring trough or channel in and along which the crayon is drawn for sharpening, and cutters protruding through apertures in the said walls, the latter being united above and below said apertures to IIC cause the portions ofthe walls at opposite 7 sides of the apertures to move as one, and a support for the edge of the crayon, the same being arranged between said yielding walls and at or above the level of the bottoms of said cutters substantially as described.

10. In acrayon-sharpener, the combination with a yieldingly-mounted cutter or cutters to sharpen the crayon, of a fixed support independent of the cutter or cutters to support the edge of the crayon during the sharpening operation.

11. In a crayon-sharpener, the combination with a support for the edge of the crayon, of

Witnesses:

FREDERICK L. EMERY, LAURA T. MANIX.

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