EP0020291B1 - Elément de support fixé à l'extrémité d'un bras de compas - Google Patents

Elément de support fixé à l'extrémité d'un bras de compas Download PDF

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Publication number
EP0020291B1
EP0020291B1 EP19800810119 EP80810119A EP0020291B1 EP 0020291 B1 EP0020291 B1 EP 0020291B1 EP 19800810119 EP19800810119 EP 19800810119 EP 80810119 A EP80810119 A EP 80810119A EP 0020291 B1 EP0020291 B1 EP 0020291B1
Authority
EP
European Patent Office
Prior art keywords
receptacle
stud
writing
compass
leg
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19800810119
Other languages
German (de)
English (en)
Other versions
EP0020291A1 (fr
Inventor
Roman Etter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leica Aarau AG
Original Assignee
Kern and Co AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kern and Co AG filed Critical Kern and Co AG
Publication of EP0020291A1 publication Critical patent/EP0020291A1/fr
Application granted granted Critical
Publication of EP0020291B1 publication Critical patent/EP0020291B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L9/00—Circular curve-drawing or like instruments
    • B43L9/16—Features common to compasses, dividers, and callipers
    • B43L9/24—Means for mounting points or writing appliances on legs

Definitions

  • the present invention relates to an attachment for compasses for attaching a writing or drawing device, in particular a tube recorder, to the compass with an attachment piece fitting in its writing leg and a receiving part for the writing or drawing device.
  • a known approach of this type for tube recorders receives the tube recorder in a thread on one side and can be fitted or clamped into the writing leg of the compass by means of an extension piece on the other side.
  • this approach difficulties arise when drawing small circles because the dimensions of the tube recorder make it difficult to set small radii, the compass tip and the writing tip have to be attached at the same time, and because the pressure on the writing tip is difficult to meter.
  • the writing tip often hooks onto the writing pad, so that the compass tip is torn out of the puncture point and moved around the writing tip.
  • the object of the present invention is therefore to provide an approach of the type mentioned for normal circles, which enables the use of tube recorders for drawing circles of any radius down to zero while avoiding the above-mentioned difficulties in a simple and clean manner.
  • a solution to this problem is according to the invention that the receiving part on the extension piece is slidably mounted in the longitudinal direction, that guide means are provided which prevent rotation between the receiving part and the extension piece, and that means for locking the sliding receiving part with respect to the extension piece are present.
  • a variant of this solution is characterized in that the receiving part is designed as a cylindrical socket, which is self-lockingly guided in the attachment piece by means of a steep thread in such a way that it can be lowered automatically onto the writing pad by its weight or by spring pressure while rotating, and that means for Locking the movable receiving part with respect to the extension piece are present.
  • the displacement range for the part receiving the tube recorder is preferably dimensioned such that, with the smallest circle spread, the writing tip of the tube recorder can both be raised above the circle tip and lowered.
  • the writing tip is expediently held in the working position of the compass by the weight of the tube pen and the movable part on the writing pad.
  • the compass shown in FIG. 1 has a first leg 2 carrying the compass tip 1 and a writing leg 5 carrying the writing tip 3 of a tube recorder 4. These legs are articulated in a known manner by a head 6, and their spread can be finely adjusted via a screw 7. The legs 2 and 5 can be bent at points 8 and 9.
  • the tube recorder 4 is screwed into the opening 10 of a receiving part 11, which is shown in detail in FIG.
  • the part 11 is, according to the invention, slidably mounted on a shoulder part 12.
  • the cylindrical extension part 12 is inserted into the writing leg 5 via a known coupling 13.
  • the displacement path of part 11 on extension 12 is limited at the top by a shoulder 14 of extension 12 and down by a guide part 16 fastened by means of a knurled screw 15 .
  • the guide part 16 secures the part 11 against rotation on the extension part 12 by engaging its guide opening 18 from below (see FIG. 2).
  • the part 11 can be locked against longitudinal displacement on the extension part 12 by a plug pin 19.
  • Fig. 2 shows a partial section through the part 11 at the height of the spigot 19.
  • This spigot 19 has a milled wedge surface 20 so that the end part 12 fitted into the opening 22 of the part 11 is clamped by pressure on the end 21 and under pressure the head 23 is released again at the other end of the pin 19.
  • the guide part 16 sliding in the opening 18 can also be replaced by a pin fixed in the opening 18, which then slides in a guide secured by the screw 15 on the attachment part 12.
  • the part 11 is now shifted so that the writing tip 3 of the tube recorder 4 is located above the circular tip 1 and cannot touch the same when the center of the circle is located on the writing pad. In this position, the part 11 is clamped by means of the plug pin 19. After setting the radius of the circle with the screw spindle 7 and inserting the compass tip 1 into the center of the circle, the pin 19 is loosened and the writing tip 3 is lowered onto the writing pad, on which it remains due to the weight of tube recorder 4 and part 11 with the appropriate contact pressure, regardless of inevitable small circle fluctuations around the position perpendicular to the desk pad.
  • the attachment part 12 itself already has a solid angular shape, while the part 11 receiving the tube recorder 4 is designed as a cylindrical socket with a handle attachment 24.
  • This socket is self-locking in the extension 12 by means of a steep thread 25 and is guided in such a way that its weight can be lowered automatically onto the writing pad by rotating it about the axis 26 and remains there with constant contact pressure.
  • To lift the tube recorder simply turn the handle attachment 24 and clamp the part 11 in the attachment piece 12 by means of a clamping screw 19 '.
  • the particular advantage of this variant compared to that described in relation to FIG. 2 is that a rotation-preventing guide means 16 and a tilting and play-prone degree guidance are avoided.
  • Fig. 4 shows an embodiment of the approach, which is similar to that shown in Fig. 1, but has a different clamping.
  • the tube recorder 4 is in turn screwed into the opening 10 of the part 11.
  • the part 11 is mounted on the extension part 12 by means of a bore 28 so as to be longitudinally displaceable.
  • the displacement of the part 11 on the extension part 12 is limited at the top by a spring ring 14 and at the bottom by a torsionally rigid guide part 16.
  • This guide part slides with a fork-shaped end along a guide pin 16 ', which is fixed in part 11 and fitted into the guide fork is.
  • the part 11 has a circular cylindrical, slightly eccentric to the bore 28. Extension 11 'of such a length that it just fills a rotatable cap 19 "which fits thereon.
  • the cap 19" also has an eccentric bore 27 for pushing through the extension 12, which is aligned with the bore 28 for an angular position. He also carries a tongue-shaped extension 30 of its edge, which engages over the part 11 and thereby prevents it from sliding out of the cap 19 ".
  • FIG. 4 a shows a view of the union 19 "in the direction of arrow 31.
  • a projection 32 is provided on the inner edge adjacent to the bore 27, which engages in an annular groove 33 on the upper edge thereof after insertion of the extension 11 'and thereby the rotation of the union 19 "is limited to the semicircular area of the annular groove 33.
  • the bore 27 moves because of its eccentric position relative to the bore 28 in the extension 11 'of the part 11 and thus causes the part 11 to be clamped against the extension part 12. This clamping is only released when the bores 27 and 28 in in the above-mentioned manner due to the angular position of the union 19 ".
  • the writing tip will be clamped in the usual position so that the radius cannot change when you draw in a manner known per se.

Landscapes

  • Pens And Brushes (AREA)

Claims (5)

1. Elément de support pour compas, destiné au montage d'un instrument d'écriture ou de dessin, notamment d'un stylographe à plume tubulaire (4), sur le compas, comprenant une pièce embout (12) qui s'ajuste dans le bras de traçage (5) du compas et une partie réceptrice (11) destinée à recevoir l'instrument d'écriture ou de dessin, caractérisé en ce que la partie réceptrice (11) est montée sur la pièce embout (12) mobile en translation dans la direction longitudinale de celle-ci, en ce qu'il est prévu des moyens de guidage (16) qui empêchent la rotation entre la partie réceptrice (11) et la pièce embout (12) et en ce qu'il est prévu des moyens (19) destinés à bloquer la partie réceptrice (11) mobile en translation, sur la pièce embout (12).
2. Elément de support pour compas, destiné au montage d'un instrument d'écriture ou de dessin, en particulier d'un stylographe à plume tubulaire (4) sur le compas, comprenant une pièce embout (12) qui s'ajuste sur le bras de traçage du compas et une partie réceptrice (11) destinée à recevoir l'instrument d'écriture ou de dessin, caractérisé en ce que la partie réceptrice (11) est réalisée sous la forme d'une monture cylindrique qui est guidée dans la pièce embout (12), sans auto-blocage au moyen d'un filetage à pas rapide (25) de manière que, sous l'effet de son poids ou d'une pression élastique, elle puisse s'abaisser spontanément sur le support de dessin en tournant et en ce que des moyens (19') sont prévus pour bloquer la partie réceptrice (11) mobile en translation sur la partie embout (12).
3. Elément de support suivant la revendication 1, caractérisé en ce que les moyens destinés à bloquer la partie réceptrice (11) mobile en translation sur la pièce embout (12) sont constitués par un prolongement cylindrique (11') de la partie réceptrice (11) qui entoure la pièce embout (12) ainsi que par un chapeau (19") qui s'ajuste sur le prolongement (11') et est guidé libre en rotation sur celui-ci, le chapeau (19") présentant un perçage (27) excentré par rapport à son axe, dans lequel la pièce embout (12) est ajustée.
4. Elément de support suivant la revendication 1 ou 3, caractérisé par un dimensionnement de la course de translation de la partie réceptrice (11) tel que, dans le cas de l'écartement minimum du compas, la pointe traceuse (3) de l'instrument d'écriture ou de dessin puisse aussi bien être relevée au-dessus de la pointe (1) du compas, qu'abaissée.
5. Elément de support suivant la revendication 4, caractérisé en ce que, dans la position de travail du compas, la pointe traceuse (3) de l'instrument d'écriture ou de dessin est maintenue sur le support de dessin par le poids de l'instrument et de la partie réceptrice (11) mobile en translation ou par une pression élastique.
EP19800810119 1979-05-28 1980-04-08 Elément de support fixé à l'extrémité d'un bras de compas Expired EP0020291B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4938/79 1979-05-28
CH493879A CH645576A5 (de) 1979-05-28 1979-05-28 Ansatz fuer zirkel.

Publications (2)

Publication Number Publication Date
EP0020291A1 EP0020291A1 (fr) 1980-12-10
EP0020291B1 true EP0020291B1 (fr) 1983-03-23

Family

ID=4285126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800810119 Expired EP0020291B1 (fr) 1979-05-28 1980-04-08 Elément de support fixé à l'extrémité d'un bras de compas

Country Status (3)

Country Link
EP (1) EP0020291B1 (fr)
CH (1) CH645576A5 (fr)
DE (1) DE3062406D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107933158B (zh) * 2017-11-16 2020-04-28 周默 一种使用方便的圆规
CN107856446B (zh) * 2017-11-16 2020-02-14 周默 一种改良型圆规

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE86533C (fr) *
GB101683A (en) * 1916-06-27 1916-10-12 John William Setten Improved Pencil Grip for Drawing Compass.
GB429394A (en) * 1934-03-09 1935-05-29 Thomas Bethel Holland Improvements in and relating to lead or like holders for drawing instruments
US2442185A (en) * 1944-05-11 1948-05-25 Szerenyi Andrew Compass for use in drafting
US2557500A (en) * 1948-06-19 1951-06-19 Carl L Fairbanks Drawing compass
US2677181A (en) * 1951-07-05 1954-05-04 Elwood E Stephens Pipe marking device
DE1561393B1 (de) * 1967-04-21 1969-11-20 Czerweny Otto Arland Von Dr Maschine zum herstellen von schachtelhülsen
DE1949803A1 (de) * 1969-10-02 1971-04-15 Messerschmitt Boelkow Blohm Stangenzirkel

Also Published As

Publication number Publication date
DE3062406D1 (en) 1983-04-28
EP0020291A1 (fr) 1980-12-10
CH645576A5 (de) 1984-10-15

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