US2502177A - Crayon pencil sharpener - Google Patents

Description

March 28, 1950 J. J. SIGMAN CRAYON PENCIL SHARPENER Filed Feb. 1, 1945 INVENTOR ATTOR NEYS Patented Mar. 28, 1950 UNITED STATES PATENT OFFICE CRAYON, PENCIL SHARPENER John J. Sigman, Cicero, Ill.

Application February 1, 1945, Serial No. 575,638

1 Claim. 1

This invention relates to crayon pencil sharpeners and has more particular reference to the sharpening of crayon pencils of the kind adapted for keeping bowling scores and like uses.

It is common practice in bowling alleys to use especially made crayon pencils for score keeping, with the crayon material or composition comprising the entire body of the. pencil and being of a diameter larger than an ordinary lead pencil; consequently when sharpening the pencil the shavings are entirely of crayon composition material. 'Invariably these pencils are sharpened in haste and under circumstances which result in the shavings being carelessly dropped on the floor and not infrequently on the playing floor. These crayon shavings because of their composition are readily picked up on the shoe soles and, being of a sticky waxy character they are apt to seriously interfere with the foot work of the player, impairing his score and possibly causing accidents and physical injury.

My invention aims to provide an improved crayon pencil sharpening device and receptacle for the crayon shavings, so designed as to effectively serve the needs in keeping bowling scores and for similar uses. In furtherance thereof, I have provided a structure of simple design adapted to be economically manufactured, one which may be quickly and easily attached to a bowling score board in a position most convenient and accessible for use, which has a relatively large receptacle for the crayon shavings and mounted so that it is firmly and securely supported so as not to be displaced by careless jostling or handling but adapted to be easily removed only by-a definite unlocking operation, and which has shaving edges constructed and arranged in a particularly advantageous manner.

Other objects and attendant advantages will be appreciated as the invention becomes better understood by reference to the following description when considered in connection with the accompanying drawings, in which- Figure 1 is a side elevation of a crayon pencil sharpener embodying my invention, attached to a bowling score board;

Fig. 2 is an enlarged top view of the sharpener removed from its mounting, partly in section;

Fig. 3 is a side elevation of the sharpener on the scale shown in Fig. 2;

Fig. 4 is a section through the cover part taken on the section line 4-4 of Fig. 2, on a further enlarged scale;

Fig. 5 is a detail section on the section line 55 of Fig. 4;

Fig. 6 is a development view of the sharpening portion;

Fig. 7 is a fragmentary section substantially on the section line 'I'! of Fig. 4;

Fig. 8 is a detail view showing one of the locking lugs on the outer side of the shavings receptacle; and Fig. 9 is a detail section on an enlarged scale at the section line 44 at the right hand end thereof.

My invention contemplates the provision of a crayon pencil sharpener characterized by two main parts, namely, a combined supporting and sharpening part H and a receptacle part l2. These may be of any suitable material but they are designed preferably to be molded of Bakelite, or thermoplastic, or other composition material, so as to obtain a low cost of manufacture and provide a structure sufliciently durable for the purpose. The receptacle I2 is of cylindrical form having a closed bottom and open top and shaped on its lowe peripheral portion to provide flat portions l3 or the equivalent which provide an effective hand grasp portion for turning the receptacle when inserting. and removing it from the cover support. The receptacle is further provided with looking lugs l4 and 15 which project outwardly at diametrically opposite locations on the outer surface, in the present embodiment. The support part II has a fiat top l6 and a depending side wall I! both of which are joined to an extension l8 in angular relation to the top and adapted for attachment to a score board i9. In the preferred embodiment holes 2| are provided in the extension [8 adapted to receive fastening screws or bolts one of which, such as 22, may also serve as part of the fastening means for holding the score paper on top of the board. As best shown in Figures 3, 4 and 9 the depending wall I! is provided with an inwardly extending flange 23 which is continuous except for slot openings 24 and 25 at diametrically opposite locations, that is, corresponding with the location of the lugs l4 and [5. These openings 24-25 are adapted to receive the lugs i4l 5 by upward movement of the receptacle to permit positioning of these lugs above the flange 23 and then by slight rotative movement of the receptacle the lugs will be rotated to a position above locking recesses 26 and 21 in the flange 23, and by lowering the receptacle its lugs i4-l5 will be received in the recesses 26-21 and held therein against rotative displacement. In order to effectively secure or look the receptacle in this position I have provided yielding spring means in the form 3 of a corrugated or undulated spring 28 which fits between the top of the flange 23 and the under wall of the top I6 and extends entirely around the recess, being at all times retained in the cover recess. Thus, when the receptacle is inserted into the holder it engages and compresses the spring and upon rotative movement to locate the locking lugs in the recess, the spring exerts sufficient tension against the top of the receptacle to force it into locking position and yieldingly hold it in such position. The construction is such as to effectively retain the re ceptacle in this locked position against accidental displacement or against becoming unfastened as a consequence of jostling. Thus, to remove the receptacle requires definite disengagin operation consisting of lifting the receptacle a definite distance and imparting rotative movement sufiicient to .bring the lugs into registration with the slots 24-45 so that the receptacle may be lowered and removed.

connecting portion. The outer edges of these portions 32-33 are curved outwardly at 35,, so

as to be substantially coplanar when the member is bent to its final form. The edge portions 35 will now be bevelled by a grinding operation or equivalent means to provide cutting edges extending from the central portion 34 to the outer end of the sharpening member, these bevels being formed on opposite sides of the member in order to properly locate the cutting edges, as will be presently apparent. The mem- .ber will now be formed by a stamping operation .to shape each member 32 and 33 in substantially semi-circular form. The member will then be bent at the central portion by suitable die memhere to bring the semi-circular portions into coacting relation, making a conical receiver for the crayon pencil with cutting edges diametrically disposed. The cutting edge portions 31 and 38 will be bent inwardly as shown in Figure to position the cutting edges inwardly from theinternai wall of the cone membe and to provide openings 39 and ll through which the shavings are discharged. When the member is thus formed the edges 35 are substantially coplanar. The wider end of the cone member is then insorted into a ferrule 22 which is threaded on its periphery. The ferrule may be suitably secured on 'thecone membe as by soldering 44', or otherwise. The cone member with its threaded ferrule will then be screwed tightly into a threaded socket 33 formed in the underside of the topwall l6, concentric with the opening 29. The open- 4 ing in the cone socket is the same diameter as the opening 29, thus forming a single guide opening leading to the sharpening edges. Thus, upon insertion of a crayon pencil into the cone socket, it may be rotated by finger movement to perform a continuous sharpening operation. Because of the composition material the cutting by the edges 31-38 will be equally distributed and the pencil body will be centralized in the cone socket, giving a concentric point to the crayon pencil. The shavings will discharge into the receptacle.

-It is believed that the foregoing conveys a clear understanding of the objects prefaced above; and it should be understood that in the practice. of my invention changes may be made in details of construction without departing from the spirit and scope of the invention as expressed in the appended claim, in which- I claim:

A crayon pencil sharpener of the character described comprising'a shavings receptacle and a cover therefor, the cover having a pencil-receiving opening and a threaded opening at the inner side of and coaxial therewith, and a crayon sharpening coneshaped member ,of sheet metal stamped to provide two similar triangular shaped portions joined together at an apex and each formed semi-circular in cross-section, said member being bent at its joined portion to bring each semi-circular triangular portion into coactive matching relation with the other forming a conical so t. h s d triangula o t on having a sharpened edge oilset inwardly from the adjacent edge of the opposite portion to provide shavings clearance passages, and an externally threaded ferrule in which the open end of the n a ed memb is fixed, sa d fe l b in screwed into said threaded opening whereby to support said conical socket member with its open end' coaxial with the pencil-receiving opening at the receptacle side thereof.

JOHN J SIGMAN.

9E5 CIT D The following references are of record in the file ,of this patent:

UNITED STATES PATENTS

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