EP0885132B1 - Pair of compasses with holder part - Google Patents

Pair of compasses with holder part Download PDF

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Publication number
EP0885132B1
EP0885132B1 EP97904332A EP97904332A EP0885132B1 EP 0885132 B1 EP0885132 B1 EP 0885132B1 EP 97904332 A EP97904332 A EP 97904332A EP 97904332 A EP97904332 A EP 97904332A EP 0885132 B1 EP0885132 B1 EP 0885132B1
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EP
European Patent Office
Prior art keywords
leg
compass
handgrip
region
axis
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EP97904332A
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German (de)
French (fr)
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EP0885132A1 (en
Inventor
Bernhard Hauri
Thomas Hauri
Ernest Igl-Hofmann
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Individual
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Individual
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L9/00Circular curve-drawing or like instruments
    • B43L9/02Compasses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L9/00Circular curve-drawing or like instruments
    • B43L9/16Features common to compasses, dividers, and callipers

Definitions

  • the invention relates to a compass with a first Leg that carries a centering needle and one on the shaft second leg is articulated, which is a drawing element wearing, the first or the second leg one Handle part for drawing.
  • Known circles comprise two legs.
  • One of these Leg has a centering tip at its lower end or the like, the other leg has on his lower end of a lead mine cradle or for a common writing instrument, such as a pencil, Pens etc. on.
  • the two legs open up their upper ends in a compass head assembly, which as top part an at least almost cylindrical shape Grip part for the user includes.
  • Such handle parts are usually provided with a border. Due to the Compass head assemblies have a pleasant handling enforced, in which the axis of the handle part in the Bisectors between the axes of the two Compass leg is guided with a straight guide.
  • the object of the invention is the head assembly of a Compasses with a handle for drawing like this execute that good handling and Operational reliability achieved and a complicated and Straight guidance of the handle part, which is susceptible to repair, is unnecessary becomes.
  • first leg with its joint for storage on the second leg in a longitudinal slot in the shaft of the second leg arranged, the longitudinal slot preferably with small spreads the first leg embraces and stabilizes the torsional stiffness acts between the legs.
  • a tapered transition part between the handle part and the the leg supporting it advantageously has a surface on which by rotating a circular line or a a similar flat line segment is created around an axis, which is in the plane of the circular line at a distance of the convex side of which is a part of a near the axis Is torus.
  • the essentially rotationally symmetrical surface of the The area of the handle part can be that of a part of a Rotational ellipsoids with slightly different ones Be semi-axles.
  • the second leg advantageously has means for receiving and fixation of interchangeable writing utensils, such as Pencil, pen or the like as Drawing element.
  • interchangeable writing utensils such as Pencil, pen or the like as Drawing element.
  • the advantages achieved with the invention include Property of the sphere-like area of the handle part, especially in the case of a targeted to a leg inclined approach axis, even when pulling one Circular line between thumb and forefinger without any problems pass on if the figure axis of this area their situation changes.
  • the tapered transition part between Handle part and compass leg serves as Orientation guide for the tip of the index finger.
  • a compass shown schematically in FIGS. 1 and 3 comprises a first leg 1, which is known per se Kind of a centering needle 2 to put on and fix the Circle in the center of the circle to be drawn.
  • the leg 1 is at its head end, i.e. with his the Centering needle 2 opposite end in one Longitudinal slot 3 of a second leg 4 by means of a Bearing screw 5 articulated, as the detail of FIG. 2 in more detail shows.
  • the longitudinal slot 3 is in the leg 4 in the form of a central flat groove on the side facing the leg 1 formed and extends from the bearing screw 5 to to an angled point 6 of the leg 4.
  • the Longitudinal slot 3 and the shaft 7 of the leg 1 are so dimensioned that the longitudinal slot 3 in particular small spreads of the compass at least with the shaft 7 part of the slot length and stabilizing the torsional stiffness between the legs works.
  • the bearing screw 5 produces a U-shaped slotted profile of the leg 4 an axial pressure on the shaft 7, so a suitable one due to the resulting friction Friction torque between legs 1 and 4 adjustable given is.
  • the second leg 4 carries one at its lower end Opening 8 and a clamping screw 9 for receiving and Fixation of interchangeable writing utensils 10, such as Pencil, pen or the like as Drawing element.
  • the second Leg 4 rigidly connected to a handle part 11, which an area 12 with an axis 13 includes rotationally symmetrical surface.
  • the diameter of the area 12 increases from a maximum value along the axis 13 up and down like a ball.
  • the surface of the Area 12 essentially as part of a Rotational ellipsoids with slightly different ones Semi-axes executed, with deviations from this area through corrugations or similar designs Improvement of the grip are given.
  • transition part 14 is provided between the handle part 11 and the second one carrying it Leg 4 .
  • the surface of the transition part 14 is closer to the axis Part of a torus, so it is geometric generated by rotating a circular line or the like flat line segment around the axis 13, the axis 13 in the plane of the circular line at a distance from it convex side.
  • the surface of the spherical area is advantageous 12 of the handle part 11 in a manner known per se Corrugations or depressions similar in effect or Provide increases to improve ease of use. For the same reason, this surface is one Made of material that is high Coefficient of friction to the skin on the fingers of one Has user person.
  • the thickness of the handle part 11, i.e. is the maximum diameter of the area 12 expedient in the range of the thickness of the fingers of a user person chosen. If, as usual, when drawing this Handle part 11 rolls between your thumb and index finger the thickness of the handle part is smaller than that of the Index finger tip, preferably a thickness equal to 11 mm proven advantageous. With this roll it allows tapered transition part 14 an unimpeded operation.
  • Fig. 1 and 3 show on the first leg 1 a widened handle 15.
  • the lower part 16 corresponds to the handle part 15 of the second leg 4 adapted.
  • the thigh 4, which carries the drawing element 10, and the Handle parts 11 and 15 are preferably made of plastic manufactured, e.g. B. from acetal resin with the trade name Delrin 100 from DUPONT, made of polyamide with the trade name Zytel from DUPONT, or made of polyester with the trade name Valox from General Electric.

Description

Die Erfindung betrifft einen Zirkel mit einem ersten Schenkel, der eine Zentriernadel trägt und am Schaft eines zweiten Schenkels angelenkt ist, welcher ein Zeichenelement trägt, wobei der erste oder der zweite Schenkel einen Griffteil zum zeichnen trägt.The invention relates to a compass with a first Leg that carries a centering needle and one on the shaft second leg is articulated, which is a drawing element wearing, the first or the second leg one Handle part for drawing.

Bekannte Zirkel umfassen zwei Schenkel. Einer dieser Schenkel trägt an seinem unteren Ende eine Zentrierspitze oder dergleichen, der andere Schenkel weist an seinem unteren Ende eine Aufnahmevorrichtung für eine Bleimine oder auch für ein übliches Schreibgerät, wie Bleistift, Kugelschreiber usw. auf. Die beiden Schenkel münden mit ihren oberen Enden in eine Zirkelkopfbaugruppe, die als oberstes Teil ein zumindest nahezu zylindrisch geformtes Griffteil für den Benutzer umfasst. Solche Griffteile sind meistens mit einer Randrierung versehen. Aufgrund der angenehmen Handhabung haben sich Zirkelkopfbaugruppen durchgesetzt, bei denen die Achse des Griffteiles in der Winkelhalbierenden zwischen den Achsen der beiden Zirkelschenkel mit einer Geradführung geführt ist.Known circles comprise two legs. One of these Leg has a centering tip at its lower end or the like, the other leg has on his lower end of a lead mine cradle or for a common writing instrument, such as a pencil, Pens etc. on. The two legs open up their upper ends in a compass head assembly, which as top part an at least almost cylindrical shape Grip part for the user includes. Such handle parts are usually provided with a border. Due to the Compass head assemblies have a pleasant handling enforced, in which the axis of the handle part in the Bisectors between the axes of the two Compass leg is guided with a straight guide.

Bei bekannten Lösungen von Geradführungen solcher Zirkel werden verzahnte Segmente an den oberen Enden der beiden Zirkelschenkel verwendet. Damit stehen die Schenkel so miteinander im Eingriff und sind in den Zentren der verzahnten Segmente mittels Achsschrauben so mit der Zirkelkopfbaugruppe verbunden, dass die gewünschte Führung des Griffteiles erfolgt. In known solutions of straight guides of such circles become toothed segments at the top ends of the two Compass legs used. This is how the legs stand engaged with each other and are in the centers of the toothed segments using axle bolts so with the Compass head assembly connected that the desired guidance of the handle part.

Weiterhin sind zur Führung eines Griffteiles auch Lösungen mit Führungskulissen und Führungsstiften bekannt gemäss DE-A1 27 28 261 (Helix International), Fig. 3, Detail 4a. Als Nachteil dieser bekannten Zirkelkopfkonstruktionen hat sich die Mehrteiligkeit und damit verbunden die Reparaturanfälligkeit herausgestellt. Insbesondere beim Gebrauch durch Kinder führen Überdehnungen der Geradführungsteile, wie Zahnsegmente usw., infolge der Hebelwirkung der Zirkelschenkel oft zu Funktionsstörungen.Furthermore, there are also solutions for guiding a handle part with guide sets and guide pins known according to DE-A1 27 28 261 (Helix International), Fig. 3, detail 4a. As a disadvantage of these known circular head constructions the multiple parts and the associated Exposure to repairs highlighted. Especially when Use by children lead to overstretching Straight guide parts, such as toothed segments, etc., as a result of Leverage of the compass legs often leads to malfunctions.

Weiterhin ist gemäss US-A-2,655,727 (E.M. Varona et al.) ein Zirkel als Kombinationsinstrument bekannt, welches drei Schenkel besitzt, deren zwei mit je einer Spitze und der dritte mit einem auswechselbaren Schreibgerät versehen sind. Einer der mit einer Spitze versehenen Schenkel trägt einen kugelähnlichen Kopf. Auch aus US-A-3,247,597 (E.G. Brown) ist ein Zirkel mit zwei Schenkeln bekannt, von denen einer an seinem Betätigungsende einen kugelförmigen Kopf trägt. Gemäss CH-A-352,146 (R. Willi) ist auch ein Zirkel bekannt, dessen kugelähnlicher Kopf aus einem thermoplastischen Kunststoff besteht.Furthermore, according to US-A-2,655,727 (E.M. Varona et al.) a compass known as a combination instrument, which three Has thighs, the two with a tip and the third provided with a replaceable writing instrument are. One of the tipped thighs wears a ball-like head. Also from US-A-3,247,597 (E.G. Brown) is a circle with two legs, one of which is known one has a spherical head at the end of its actuation wearing. According to CH-A-352.146 (R. Willi) is also a circle known, whose spherical head from a thermoplastic material.

Aufgabe der Erfindung ist es, die Kopfbaugruppe eines Zirkels mit einem Griffteil zum zeichnen derart auszuführen, dass eine gute Handhabung und Betriebssicherheit erzielt und eine komplizierte und reparaturanfällige Geradführung des Griffteiles entbehrlich wird.The object of the invention is the head assembly of a Compasses with a handle for drawing like this execute that good handling and Operational reliability achieved and a complicated and Straight guidance of the handle part, which is susceptible to repair, is unnecessary becomes.

Gemäß der Erfindung wind diese Aufgabe durch die Merkmale des kennzeichnenden Teils des Anspruchs 1 golöst. According to the invention this object is achieved through the features of characterizing part of claim 1 solves.

Nach einem zweckmässigen Merkmal der Erfindung ist der erste Schenkel mit seiner Gelenkstelle zur Lagerung an dem zweiten Schenkel in einem Längsschlitz im Schaft des zweiten Schenkels angeordnet, wobei der Längsschlitz vorzugsweise bei kleinen Spreizungen den ersten Schenkel umfasst und stabilisierend auf die Verwindungssteifigkeit zwischen den Schenkeln wirkt.According to an expedient feature of the invention first leg with its joint for storage on the second leg in a longitudinal slot in the shaft of the second leg arranged, the longitudinal slot preferably with small spreads the first leg embraces and stabilizes the torsional stiffness acts between the legs.

Ein verjüngter Übergangsteil zwischen dem Griffteil und dem ihn tragenden Schenkel weist mit Vorteil eine Oberfläche auf, welche durch Drehung einer Kreislinie oder eines ähnlichen ebenen Linienstückes um eine Achse erzeugt wird, welche in der Ebene der Kreislinie in einem Abstand von deren konvexer Seite liegt, also ein achsnaher Teil eines Torus ist.A tapered transition part between the handle part and the the leg supporting it advantageously has a surface on which by rotating a circular line or a a similar flat line segment is created around an axis, which is in the plane of the circular line at a distance of the convex side of which is a part of a near the axis Is torus.

Die im wesentlichen rotationssymmetrische Oberfläche des Bereiches des Griffteiles kann jene eines Teiles eines Rotationsellipsoides mit geringfügig unterschiedlichen Halbachsen sein.The essentially rotationally symmetrical surface of the The area of the handle part can be that of a part of a Rotational ellipsoids with slightly different ones Be semi-axles.

Vorteilhaft weist der zweite Schenkel Mittel zur Aufnahme und Fixierung von auswechselbaren Schreibgeräten, wie Bleistift, Kugelschreiber oder dergleichen als Zeichenelement auf. Auch liegt der Maximalwert des Durchmessers des Bereiches mit im wesentlichen rotationssymmetrischer Oberfläche in einem Bereich, dessen Werte kleiner als die Dicke der Finger einer Benutzer-Person sind.The second leg advantageously has means for receiving and fixation of interchangeable writing utensils, such as Pencil, pen or the like as Drawing element. The maximum value of the Diameter of the area with essentially rotationally symmetrical surface in an area whose Values smaller than the thickness of the fingers of a user person are.

Weitere zweckmässige Ausführungsformen der Erfindung sind in den Patentansprüchen gekennzeichnet. Further expedient embodiments of the invention are characterized in the claims.

Zu den mit der Erfindung erzielten Vorteilen gehört die Eigenschaft des kugelähnlichen Bereiches des Griffteiles, insbesondere im Falle einer gezielt zu einem Schenkel geneigten Ansatzachse, sich auch dann beim ziehen einer Kreislinie problemlos zwischen Daumen und Zeigefinger abzuwälzen, wenn die Figurenachse dieses Bereiches dabei ihre Lage ändert. Der verjüngte Übergangsteil zwischen Griffteil und Zirkelschenkel dient hierbei als Orientierungshilfe für die Spitze des Zeigefingers.The advantages achieved with the invention include Property of the sphere-like area of the handle part, especially in the case of a targeted to a leg inclined approach axis, even when pulling one Circular line between thumb and forefinger without any problems pass on if the figure axis of this area their situation changes. The tapered transition part between Handle part and compass leg serves as Orientation guide for the tip of the index finger.

Die Erfindung ist in der folgenden Beschreibung und der Zeichnung, die ein Ausführungsbeispiel darstellt, näher erläutert. Es zeigen

  • Fig. 1 eine Seitenansicht eines erfindungsgemäss ausgebildeten Zirkels in geschlossener Stellung mit einem kugelähnlichen Griffteil und Mitteln zur Aufnahme auswechselbarer Schreibgeräte,
  • Fig. 2 Details zur Lagerung der Zirkelschenkel und zur Aufnahme von Schreibgeräten bei einem Zirkel gemäss Fig. 1, und
  • Fig. 3 eine Ansicht des Zirkels gemäss Fig. 1 in geöffneter Stellung.
  • The invention is explained in more detail in the following description and the drawing, which represents an embodiment. Show it
  • 1 is a side view of a compass designed according to the invention in the closed position with a ball-like grip part and means for receiving interchangeable writing utensils,
  • Fig. 2 details on the storage of the compass legs and for receiving writing instruments in a compass according to Fig. 1, and
  • Fig. 3 is a view of the circle of FIG. 1 in the open position.
  • Ein in Fig. 1 und 3 schematisch dargestellter Zirkel umfasst einen ersten Schenkel 1, der in an sich bekannter Art eine Zentriernadel 2 zum aufsetzen und fixieren des Zirkels im Mittelpunkt des zu zeichnenden Kreises trägt. Der Schenkel 1 ist mit seinem Kopfende, d.h. mit seinem der Zentriernadel 2 gegenüberliegenden Ende in einem Längsschlitz 3 eines zweiten Schenkels 4 mittels einer Lagerschraube 5 angelenkt, wie das Detail der Fig. 2 näher zeigt.A compass shown schematically in FIGS. 1 and 3 comprises a first leg 1, which is known per se Kind of a centering needle 2 to put on and fix the Circle in the center of the circle to be drawn. The leg 1 is at its head end, i.e. with his the Centering needle 2 opposite end in one Longitudinal slot 3 of a second leg 4 by means of a Bearing screw 5 articulated, as the detail of FIG. 2 in more detail shows.

    Der Längsschlitz 3 ist im Schenkel 4 in Form einer mittigen ebenen Nut auf der dem Schenkel 1 zugewandten Seite ausgebildet und erstreckt sich von der Lagerschraube 5 bis zu einer abgewinkelten Stelle 6 des Schenkels 4. Der Längsschlitz 3 und der Schaft 7 des Schenkels 1 sind so dimensioniert, dass der Längsschlitz 3 insbesondere bei kleinen Spreizungen des Zirkels den Schaft 7 wenigstens mit einem Teil der Schlitzlänge umfasst und stabilisierend auf die Verwindungssteifigkeit zwischen den Schenkeln wirkt. Die Lagerschraube 5 erzeugt im U-förmig geschlitzten Profil des Schenkels 4 einen axialen Druck auf den Schaft 7, damit durch die entstehende Reibung ein geeignetes Friktionsmoment zwischen den Schenkeln 1 und 4 einstellbar gegeben ist.The longitudinal slot 3 is in the leg 4 in the form of a central flat groove on the side facing the leg 1 formed and extends from the bearing screw 5 to to an angled point 6 of the leg 4. The Longitudinal slot 3 and the shaft 7 of the leg 1 are so dimensioned that the longitudinal slot 3 in particular small spreads of the compass at least with the shaft 7 part of the slot length and stabilizing the torsional stiffness between the legs works. The bearing screw 5 produces a U-shaped slotted profile of the leg 4 an axial pressure on the shaft 7, so a suitable one due to the resulting friction Friction torque between legs 1 and 4 adjustable given is.

    Der zweite Schenkel 4 trägt an seinem unteren Ende eine Öffnung 8 und eine Klemmschraube 9 zur Aufnahme und Fixierung von auswechselbaren Schreibgeräten 10, wie Bleistift, Kugelschreiber oder dergleichen als Zeichenelement. An seinem oberen Ende ist der zweite Schenkel 4 starr mit einem Griffteil 11 verbunden, welches einen Bereich 12 mit um eine Achse 13 rotationssymmetrischer Oberfläche umfasst. Wie die Fig. 1 und 3 zeigen, nimmt der Durchmesser des Bereiches 12 von einem Maximalwert längs der Achse 13 nach oben und unten kugelähnlich ab. Vorzugsweise ist die Oberfläche des Bereiches 12 im wesentlichen als Teil eines Rotationsellipsoides mit geringfügig unterschiedlichen Halbachsen ausgeführt, wobei Abweichungen von dieser Fläche durch Riffelungen oder ähnliche Gestaltungen zur Verbesserung der Griffigkeit gegeben sind.The second leg 4 carries one at its lower end Opening 8 and a clamping screw 9 for receiving and Fixation of interchangeable writing utensils 10, such as Pencil, pen or the like as Drawing element. At its top is the second Leg 4 rigidly connected to a handle part 11, which an area 12 with an axis 13 includes rotationally symmetrical surface. Like FIG. 1 and Fig. 3, the diameter of the area 12 increases from a maximum value along the axis 13 up and down like a ball. Preferably, the surface of the Area 12 essentially as part of a Rotational ellipsoids with slightly different ones Semi-axes executed, with deviations from this area through corrugations or similar designs Improvement of the grip are given.

    Zwischen dem Griffteil 11 und dem ihn tragenden zweiten Schenkel 4 ist ein verjüngter Übergangsteil 14 vorgesehen. Die Oberfläche des Übergangsteiles 14 ist als achsnaher Teil eines Torus ausgebildet, sie ist also geometrisch erzeugt durch Drehung einer Kreislinie oder eines ähnlichen ebenen Linienstückes um die Achse 13, wobei die Achse 13 in der Ebene der Kreislinie in einem Abstand von deren konvexer Seite liegt. Between the handle part 11 and the second one carrying it Leg 4 is a tapered transition part 14 is provided. The surface of the transition part 14 is closer to the axis Part of a torus, so it is geometric generated by rotating a circular line or the like flat line segment around the axis 13, the axis 13 in the plane of the circular line at a distance from it convex side.

    Wie die Fig. 1 und 3 zeigen, weist die Achse 13 von Griffteil 11, Bereich 12 und Übergangsteil 14 gegen die Achse 18 des zweiten Schenkels 4, welche sich zwischen Lagerschraube 5 und einer Spitze 17 des Schreibgerätes 10 erstreckt, eine Neigung von etwa 15 Grad zum Schreibggerät 10 hin auf. Daher hat diese Achse 13 bei häufig vorkommenden Zirkelöffnungen von etwa 30 Grad die Lage der Winkelhalbierenden zwischen den Achsen der Schenkel 1 und 4, welche eine besonders bequeme Benutzung des Zirkels erlaubt.1 and 3 show, the axis 13 of Handle part 11, area 12 and transition part 14 against the Axis 18 of the second leg 4, which is between Bearing screw 5 and a tip 17 of the writing instrument 10 extends, an inclination of about 15 degrees to the writing utensil 10 out. Therefore, this axis has 13 at frequent occurring circular openings of about 30 degrees the location of the Bisector between the axes of the legs 1 and 4, which is a particularly convenient use of the compass allowed.

    Mit Vorteil ist die Oberfläche des kugelähnlichen Bereiches 12 des Griffteiles 11 in an sich bekannter Art mit Riffelungen oder in der Wirkung ähnlichen Vertiefungen oder Erhöhungen zur Verbesserung des Bedienkomforts versehen. Aus dem gleichen Grund ist diese Oberfläche aus einem Material ausgeführt, welches einen hohen Reibungskoeffizienten zur Haut an den Fingern einer Benutzer-Person aufweist. Die Dicke des Griffteiles 11, d.h. der maximale Durchmesser des Bereiches 12 ist zweckmässig im Bereich der Dicke der Finger einer Benutzer-Person gewählt. Wenn man, wie üblich, beim zeichnen das Griffteil 11 zwischen Daumen und Zeigefinger abrollt, hat sich eine Dicke des Griffteiles kleiner als jene der Zeigefingerspitze, vorzugsweise eine Dicke gleich 11 mm als vorteilhaft erwiesen. Bei diesem abrollen erlaubt das verjüngte Übergangsteil 14 eine ungehinderte Bedienung.The surface of the spherical area is advantageous 12 of the handle part 11 in a manner known per se Corrugations or depressions similar in effect or Provide increases to improve ease of use. For the same reason, this surface is one Made of material that is high Coefficient of friction to the skin on the fingers of one Has user person. The thickness of the handle part 11, i.e. is the maximum diameter of the area 12 expedient in the range of the thickness of the fingers of a user person chosen. If, as usual, when drawing this Handle part 11 rolls between your thumb and index finger the thickness of the handle part is smaller than that of the Index finger tip, preferably a thickness equal to 11 mm proven advantageous. With this roll it allows tapered transition part 14 an unimpeded operation.

    Zur Steigerung der Handlichkeit, z.B. beim Abtragen von Strecken mit dem Zirkel, trägt derselbe, wie Fig. 1 und 3 zeigen, am ersten Schenkel 1 ein verbreitertes Griffteil 15. Dem Griffteil 15 entsprechend ist der untere Teil 16 des zweiten Schenkels 4 angepasst ausgebildet. Der Schenkel 4, welcher das Zeichenelement 10 trägt, sowie die Griffteile 11 und 15 sind vorzugsweise aus Kunststoff gefertigt, z. B. aus Azetalharz mit dem Handelsnamen Delrin 100 der Firma DUPONT, aus Polyamid mit dem Handelsnamen Zytel von DUPONT, oder aus Polyester mit dem Handelsnamen Valox von General Electric. To increase handiness, e.g. when removing Stretch with the compass, carries the same as Fig. 1 and 3 show on the first leg 1 a widened handle 15. The lower part 16 corresponds to the handle part 15 of the second leg 4 adapted. The thigh 4, which carries the drawing element 10, and the Handle parts 11 and 15 are preferably made of plastic manufactured, e.g. B. from acetal resin with the trade name Delrin 100 from DUPONT, made of polyamide with the trade name Zytel from DUPONT, or made of polyester with the trade name Valox from General Electric.

    Neben den in den Patentansprüchen definierten Merkmalen können erfindungsgemässe Zirkel auch Kombinationen mit bekannten Merkmalen aufweisen. So kann eine Verstellbarkeit der Zirkelspreizung mittels Teilelement, z.B. einer Spindel oder eines verzahnten Elementes zweckmässig sein.In addition to the features defined in the claims circles according to the invention can also be combined with have known features. So an adjustability the circular spreading by means of a sub-element, e.g. a spindle or a toothed element should be appropriate.

    Claims (9)

    1. A compass, having a first leg (1) which has a centering pin (2) and is pivotably joined to the shaft of a second leg (4), which carries a drawing instrument (10), and the first leg (1) or second leg (4) carries a handgrip (11) for drawing purposes, and the handgrip (11) is rigidly joined to the leg (4) carrying it and includes a region (12) with a surface substantially rotationally symmetrical to an axis (13), the diameter of which surface decreases axially in both directions from a maximum value in a way similar to a ball, characterized in that the axis (13) of the region (12) of the handgrip (11), compared to the axis (18) of the leg (4) rigidly joined to the handgrip (11), which extends between a bearing screw (5) of the joint between the legs (1, 4) and a pointed tip (17) of the drawing instrument (10), has an inclination of approximately 15° toward the drawing instrument (10), such that at a compass spread angle of approximately 30° taken between the bearing screw (5) and respectively the pointed tip of the centering pin (2) and of the drawing instrument (10), with approximately equal lengths of the legs (1, 4) of the compass, the axis (13) of the region (12) of the handgrip (11) is located parallel to the angle bisector between the legs (1, 4).
    2. The compass of claim 1, characterized in that the first leg (1) is disposed with its pivot point (5), for being supported on the second leg (4), in a longitudinal slot (3) in the shaft of the second leg (4), and preferably when the spread angles are small, the longitudinal slot (3) surrounds the first leg (1, 7) and has a stabilizing effect on the torsional strength between the legs.
    3. The compass of one of claims 1 or 2, characterized in that a tapered transitional part (14) of the handgrip (11) has a surface, toward the leg (4) carrying it, which is generated by rotating a circular line or similar planar line segment about the axis (13) of the region (12), which axis is located in the plane of the circular line, spaced apart from its convex side.
    4. The compass of one of claims 1 - 3, characterized in that the substantially rotationally symmetrical surface of the region (12) of the handgrip (11) has fluting or indentations or protuberances of similar effect.
    5. The compass of one of claims 1 - 4, characterized in that the substantially rotationally symmetrical surface of the region (12) of the handgrip (11) is embodied of a material which has a high coefficient of friction with regard to the skin of the fingers of a person using it.
    6. The compass of one of claims 1 - 5, characterized in that the substantially rotationally symmetrical surface of the region (12) of the handgrip (11) is the portion of an ellipsoid of revolution that has slightly different semiaxes.
    7. The compass of one of claims 1 - 6, characterized in that the second leg (4) has means (8, 9) for receiving and fixing interchangeable writing tools, such as a pencil, ballpoint pen or the like, as the drawing instrument (10).
    8. The compass of one of claims 1 - 7, characterized in that the maximum value of the diameter of the region (12) with the substantially rotationally symmetrical surface is located in a region whose values are smaller than the thickness of the fingers of a person using it.
    9. The compass of one of claims 1 - 8, characterized in that on the first leg (1), a widened handgrip (15) for improving manipulability is provided.
    EP97904332A 1996-03-02 1997-02-24 Pair of compasses with holder part Expired - Lifetime EP0885132B1 (en)

    Applications Claiming Priority (4)

    Application Number Priority Date Filing Date Title
    CH53596 1996-03-02
    CH535/96 1996-03-02
    CH53596 1996-03-02
    PCT/CH1997/000070 WO1997031787A1 (en) 1996-03-02 1997-02-24 Pair of compasses with holder part

    Publications (2)

    Publication Number Publication Date
    EP0885132A1 EP0885132A1 (en) 1998-12-23
    EP0885132B1 true EP0885132B1 (en) 1999-12-22

    Family

    ID=4189254

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP97904332A Expired - Lifetime EP0885132B1 (en) 1996-03-02 1997-02-24 Pair of compasses with holder part

    Country Status (7)

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    EP (1) EP0885132B1 (en)
    JP (1) JP2000505374A (en)
    CN (1) CN1212655A (en)
    AU (1) AU1716097A (en)
    CA (1) CA2248871A1 (en)
    DE (1) DE59700891D1 (en)
    WO (1) WO1997031787A1 (en)

    Families Citing this family (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN107599691A (en) * 2017-09-04 2018-01-19 安徽信息工程学院 Multifunctional compass
    CN110370845A (en) * 2019-07-19 2019-10-25 得力集团有限公司 A kind of compasses drawing circle leg and detachably replacing
    JP7102000B2 (en) * 2019-08-23 2022-07-19 クツワ株式会社 compass
    CN113071249B (en) * 2021-03-30 2022-07-15 郑州铁路职业技术学院 Compasses convenient for teenagers to use

    Family Cites Families (13)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    NL8963C (en) * 1919-09-27
    US2082065A (en) * 1934-11-07 1937-06-01 Knackert George Compass
    FR995758A (en) * 1949-08-04 1951-12-07 Compass refinements
    US2655727A (en) * 1950-10-18 1953-10-20 Manuel Salientes Locking pen and pencil compass and divider
    FR1047498A (en) * 1952-01-03 1953-12-15 Improvement to compasses, balusters and similar components
    CH352146A (en) * 1957-06-19 1961-02-15 Willi Robert Circle
    US3247597A (en) * 1963-08-21 1966-04-26 Edward G Brown Drafting compass
    FR2271054A1 (en) * 1974-05-13 1975-12-12 Baignol & Farjon Sa Pair of compasses using ball point pen - has leg formed by pen gripped by jaws when top pivot screw is tightened
    CA1068896A (en) * 1976-06-29 1980-01-01 Helix International Limited Drawing compass
    GB2121728A (en) * 1982-05-26 1984-01-04 Ching Chiang Liu Compasses
    IT1228671B (en) * 1989-03-20 1991-07-03 Ilca Spa COMPASSO, PARTICULARLY FOR DESIGNERS.
    GB2232381B (en) * 1989-06-09 1992-11-25 F J Regamey Artists' proportional dividers
    US5542185A (en) * 1994-04-15 1996-08-06 Fiskars Inc. Device for describing arcs

    Also Published As

    Publication number Publication date
    EP0885132A1 (en) 1998-12-23
    CN1212655A (en) 1999-03-31
    DE59700891D1 (en) 2000-01-27
    CA2248871A1 (en) 1997-09-04
    JP2000505374A (en) 2000-05-09
    AU1716097A (en) 1997-09-16
    WO1997031787A1 (en) 1997-09-04

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