DE723038C

DE723038C - Sharpener for pencil leads

Info

Publication number: DE723038C
Application number: DED82407D
Authority: DE
Inventors: Georges Dessonnaz
Original assignee: ROGER DE WERRA
Current assignee: ROGER DE WERRA
Priority date: 1939-04-08
Filing date: 1940-03-31
Publication date: 1942-07-27
Also published as: GB534600A; CH209870A; FR864506A; US2242458A

Description

Die Erfindung betrifft einen Schärfer für Bleistiftminen, bestehend aus einem im Querschnitt kreisrunden Behälter, in dessen oberer Wandung ein diametral durchbohrtes Kugelgelenk für die Aufnahme eines Bleistiftes oder Minenhalters angeordnet ist und der in seinem Innern eine kegelige Reibfläche aufweist, deren Längsachse durch den Mittelpunkt des Kugelgelenkes hindurchgeht.The invention relates to a sharpener for pencil leads, consisting of a cross-section circular container, in the upper wall of which a diametrically drilled ball joint is arranged for the inclusion of a pencil or lead holder and in his Has a conical friction surface inside, the longitudinal axis of which passes through the center of the ball joint passes through.

Bei den bekannten Schärfern dieser Art nimmt der Bleistift oder Minenhalter keine bestimmte Lage in bezug auf die Reibfläche ein, und die Mine muß infolgedessen während der dem Kopfende des Minenhalters für das Schärfen erteilten kreisförmigen Bewegung gegen diese Fläche gepreßt werden. Infolge dieses Umstandes ist es schwer, die Mine regelmäßig und genau zu schärfen, und es besteht überdies die Gefahr, daß sie bei einem größeren Druck gegen diese Fläche abgebrochen wird. Außerdem kann die metallische Spitze des Minenhalters leicht mit der Reibfläche in Berührung kommen und daran zerstört werden.With the known sharpeners of this type, the pencil or lead holder does not take any certain position in relation to the friction surface, and the mine must as a result during against the circular motion imparted to the tip of the lead holder for sharpening this area can be pressed. As a result of this, it is difficult to mine regularly and to sharpen precisely, and there is also the risk that they will be with a larger Printing against this surface is canceled. In addition, the metal tip of the lead holder easily come into contact with the friction surface and be destroyed.

Gegenüber diesen bekannten Schärfern bees steht das Neue am Schärfer nach der Erfindung darin, daß er an dem Kugelgelenk eine in das Innere des Behälters ragende, an ihrem freien Ende entsprechend der Bleistiftspitze kegelige, zum Führen des Stiftes dienende Hülse und unten im Behälter einen in Richtung der Längsachse der kegeligen Reibfläche verlaufenden, fingerhutartigen, zum Führen des Stiftes während des Schärfens dienenden Kegel aufweist. Compared to these well-known bees sharpeners, there is something new about the sharpener according to the invention in that he has a protruding into the interior of the container on the ball joint, on hers free end corresponding to the pencil tip, conical sleeve serving to guide the pen and at the bottom of the container one running in the direction of the longitudinal axis of the conical friction surface, Has thimble-like, for guiding the pen while sharpening serving cone.

In der Zeichnung sind zwei Ausführungsbeispiele des Erfindungsgegenstandes dargestellt, und zwar zeigen:In the drawing, two exemplary embodiments of the subject matter of the invention are shown, namely show:

•Fig. ι einen Aufriß' des ersten Ausführungsbeispiels, • Fig. ι an elevation 'of the first embodiment,

Fig. 2 einen Grundriß,Fig. 2 is a plan view,

Fig. 3 einen Schnitt nach der Linie III-III der Fig. 2,Fig. 3 is a section along the line III-III of Fig. 2,

Fig. 4 einen Aufriß des zweiten Ausführungsbeispiels und Fig. 4 is an elevation of the second embodiment and

Fig. 5 einen Schnitt nach der Linie V-V der Fig. 4.FIG. 5 shows a section along the line V-V in FIG. 4.

Der in Fig. 1 bis 3 dargestellte Schärfer stellt einen Behälter dar, der aus einem Oberteil 1 und einem Unterteil oder Sockel 2 besteht, die trennbar zusammengebaut und beispielsweiseThe sharpener shown in FIGS. 1 to 3 represents a container which consists of an upper part 1 and a base or base 2 which is assembled and separable, for example

Claims

are made of aluminum sheet. The upper part consists of two hollow cylinders 3 and 4 of different diameters, between which an annular shoulder attachment 5 is located. The upper end of the cylinder 3 is partially closed by an end wall 6, this End wall has a central opening 7 with an inwardly facing edge 8. Of the Lower part or base 2 is through a hollow cylinder, a rounded shoulder attachment 10, a cylindrical wing 11 and a middle, Thimble-like cone 12 is formed which extends axially into the interior of the container. The upper part 1 is placed on the support surface 11 of the base 2 by means of its cylinder 4.

A conical ring 13 is located between the shoulder attachment 5 of the upper part 1 and the base 2 made of hardened steel clamped, which has an inner friction surface 14. A sleeve 15, for example made of plastic or the like, extends through the opening 7 malleable building material, one end of which carries a diametrically drilled ball joint 16, whose outer diameter is slightly larger than the diameter of the opening 7, so that it can rest on the edge 8 of this opening. The other end of the sleeve 15 has one of the Pencil tip corresponding conical shape with an opening that acts as a passage for the Pencil lead is used. On the sleeve is also on its outer circumference below the ball joint 16 a projection 17 is provided.

In a lateral opening 18 of the base 2 there is a sharpening device 19 of the known type Type for pre-cutting the pencil wood accommodated.

The pencil sharpener described above is used in the following manner.

After the lead of a pencil has been exposed by means of the device 19, is this pencil inserted into the sleeve 15, so that the lead through the tapered end this sleeve passes and with the friction surface 14 of the conical ring 13 in contact comes. Then the pencil is given a circular movement (see Fig. 2) by you twist it between your fingers at the same time; the sleeve 15 becomes circular during this Movement guided on the thimble-like cone 12 of the base 2 and describes a conical Surface so that the lead of the pencil is constantly in contact with the friction surface 14 of the ring 13 remain.

The pencil or lead holder inserted into the case is automatically inserted into an in with respect to the friction surface held certain position when sharpening the lead with the pencil or the lead holder is given a circular movement by hand at its head end, and the mine takes on a sharply pointed conical shape. A few are sufficient Twists to give even cylindrical mines this sharply pointed shape.

The projection 17 of the sleeve 15 cooperates the edge 8 of the opening 7 together to prevent this sleeve from accidentally falling out to prevent the container as long as the upper part 1 and the base 2 of the latter are combined.

The sharpener shown in Fig. 4 and 5 consists of an upper part 21 / 'of the example can be made of synthetic resin, is provided with outer grinding surfaces 22 and on * his The lower part has an internal thread 23 with which it is screwed onto a base 24 is. The upper part 21 again has a central opening 25 with an inwardly turned edge 26, which is arranged as a seat for a swingable in this opening Ball joint 28 is used. A projection 27 is provided in the interior of the upper part 21. Between this projection and the base 24, a conical ring 29 is clamped, the is designed the same as the ring 13 of the first embodiment. Between the ring 29 and the base 24 is clamped with a guide member made of sheet aluminum, for example exists and has a flange 30 and a central, thimble-like cone 31. In the base 24 there is also a sharpening device 32 for pre-cutting the pencil wood housed.

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Sharpener for pencil leads, consisting of a container with a circular cross-section, in its upper wall a diametrically drilled ball joint for holding a pencil or lead holder is arranged and which has a conical friction surface in its interior, the The longitudinal axis passes through the center of the ball joint, characterized in that that he has a protruding into the interior of the container on the ball joint (16), at its free end corresponding to the pencil point conical, for guiding the pen serving sleeve (15) and at the bottom of the Container a thimble-like, running in the direction of the longitudinal axis of the conical friction surface, for guiding the pencil during sharpening serving cone (12).

1 sheet of drawings