EP0395971B1 - Compas à étrier-ressort - Google Patents

Compas à étrier-ressort Download PDF

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Publication number
EP0395971B1
EP0395971B1 EP90107604A EP90107604A EP0395971B1 EP 0395971 B1 EP0395971 B1 EP 0395971B1 EP 90107604 A EP90107604 A EP 90107604A EP 90107604 A EP90107604 A EP 90107604A EP 0395971 B1 EP0395971 B1 EP 0395971B1
Authority
EP
European Patent Office
Prior art keywords
compass
legs
spring bow
spring clip
spring
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 - Lifetime
Application number
EP90107604A
Other languages
German (de)
English (en)
Other versions
EP0395971A1 (fr
Inventor
Dietmar Seelig
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.)
M. SEELIG KG REISSZEUGFABRIK
Rotring International GmbH and Co KG
Original Assignee
M SEELIG KG Reisszeugfabrik
Rotring International GmbH and Co KG
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 M SEELIG KG Reisszeugfabrik, Rotring International GmbH and Co KG filed Critical M SEELIG KG Reisszeugfabrik
Publication of EP0395971A1 publication Critical patent/EP0395971A1/fr
Application granted granted Critical
Publication of EP0395971B1 publication Critical patent/EP0395971B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B43L9/20—Pivots
    • 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
    • B43L9/02—Compasses

Definitions

  • the invention relates to a spring bracket with a spring bracket with its free ends in engagement with the rear ends of the compass legs and with an extending through the compass adjuster, the rear ends of the compass are in supportive engagement with each other.
  • the spring clip In a known spring clip of this type (US-A 4,120,092), the spring clip consists of an arc-shaped strip of constant material thickness, the free ends of which extend in recesses on the outer sides of the rear ends of the compass legs and thus exert a spring force on them in order to form the compass legs Interacting with the adjusting device having a threaded spindle, a handle and a spindle provided with shoulders in a defined position, the compass legs with their the rear ends are supported on a roller arranged in a recess of the compass legs and are held together by the spring clip.
  • a spring clip compass is known from US Pat. No. 2,296,279, in which the cross section of the spring clip increases continuously away from the free ends as shown in FIG. 7.
  • the spring brackets used in the known spring bracket circles represent a weak point of the entire circuit structure in that they have no secure connection to the compass legs.
  • a spring clip of the type mentioned at the outset is designed in such a way that projections are provided at the free ends of the spring clip which extend substantially transversely to the plane containing the longitudinal axes of the two circle legs and which engage in the region of the rear ends of the circle legs trained, circular arc-shaped guide slots.
  • a peg-shaped grip element can be integrally formed on the outside of the spring clip so that the spring clip and grip element can be produced in one piece in one operation, while previously several working steps were required to manufacture the spring clip and peg-shaped handle element and to form a threaded hole in the spring clip into which the handle element can be screwed.
  • each of the toothed segments of the spring clip according to the invention can consist of plastic, and in order to achieve a particularly uniform and precise guidance, each of the toothed segments can consist of two adjacent sections, the toothings of which are offset from one another in the direction of rolling.
  • toothed segments are made of plastic in a spring clip assembly according to the invention, it is expedient to also form the guide slots in these toothed segments for the engagement of projections provided on the spring clip.
  • the spring clip compass shown has compass legs 1, 2, at the front ends of which clamping screws 3, 4 are fastened in the usual manner, with the aid of which a needle tip 6 or a lead lead 5 can be fastened in the front end of the respective compass leg.
  • a guide device which, in the usual way, has a threaded pin 11 with threads of different direction and can be rotated with the aid of a knurled wheel 12 which is fixed non-rotatably on it, so that the thread of the Setscrew 11 with nuts, not shown, held by rivets 9 and 10 in the compass legs 1 and 2 can cause an adjustment of the opening angle of the compass legs 1, 2.
  • toothed segments 7, 8 are fastened, which are in supportive engagement with one another and which have a shift towards the free rear end of the associated compass leg (Fig 2).
  • each of the tooth segments consists of two adjacent sections 8 'and 8'', which are offset from each other in the rolling direction, so that where one section carries a tooth, the other section has a tooth gap having. As is known, this results in a uniform and precise guidance of the tooth segments during the rolling.
  • the spring clip 13 With the rear ends of the compass legs 1 and 2 is a spring clip 13 in engagement, which compresses the compass legs 1, 2, as is usual with spring clip compasses, in the rear end region and thus holds them in position.
  • the spring clip 13 is made of plastic, for example of fiber-reinforced polyamide, both glass fibers and carbon fibers being suitable as fibers.
  • the material thickness of the spring clip 13, as can be seen in FIG. 1 increases continuously and uniformly from the free ends to the rear central region, on which a peg-shaped grip element 14 is formed on the outside.
  • the desired spring behavior is achieved by this increase in material thickness. It should be noted that it is also possible to achieve this spring behavior by continuously increasing the width of the spring clip alone or by a combination of the increases in the width and thickness of the spring clip.
  • the free ends of the spring clip 13 engage in recesses on the outer sides of the compass legs, so that the spring clip 13 is held in position there.
  • the free ends of the spring clip 13 are approximately C-shaped in section, and the legs of this C adjoining the base extend along the side faces of the compass legs.
  • the inward projections 16 formed on the free ends of the legs are brought into engagement with circular guide slots 15 (FIG. 2) by elastic bending of the spring clip ends.

Landscapes

  • Clamps And Clips (AREA)
  • Springs (AREA)

Claims (6)

  1. Compas à étrier-ressort avec un étrier-ressort (13) se trouvant par ses extrémités libres en prise avec les extrémités postérieures des branches (1, 2) du compas et avec un dispositif de réglage (11, 12) s'étendant à travers les branches du compas (1, 2), les extrémités postérieures des branches du compas (1, 2) se trouvant en prise en s'appuyant l'une sur l'autre, compas dans lequel l'étrier-ressort est en matière plastique et la section transversale du matériau augmente de façon continue à partir des deux extrémités libres et dans la même mesure, compas caractérisé en ce que sur les extrémités libres de l'étrier-ressort (13) sont prévues des saillies (16) s'étendant sensiblement perpendiculairement au plan contenant les axes longitudinaux des deux branches du compas (1, 2), saillies qui sont en prise avec des fentes de guidage (15) formées dans la zone des extrémités arrière des branches du compas (1, 2) ayant la forme d'arc de cercle.
  2. Compas à étrier-ressort selon la revendication 1, caractérisé en ce que, au milieu entre les extrémités libres de l'étrier-ressort (13) on forme un élément de prise (14) en forme de béton sur le côté extérieur de l'étrier.
  3. Compas à étrier-ressort selon la revendication 1 ou 3 caractérisé en ce que les extrémités arrière des branches du compas (1, 2) sont en prise en s'appuyant l'une sur l'autre au moyen de segments dentés (7,8) prévus sur elles.
  4. compas à étrier-ressort selon la revendication 3, caractérisé en ce que les segments dentés (7, 8) sont en matière plastique.
  5. Compas à étrier-ressort selon la revendication 2 ou 3, caractérisé en ce que chacun des segments dentés (par exemple 8) consiste en deux sections (8', 8'') se trouvant côte à côte dont les dentures sont décalées l'une par rapport à l'autre dans le sens du développement.
  6. Compas à étrier-ressort selon la revendication 1 et l'une des revendications 3 à 5, caractérisé en ce que les fentes de guidage (15) sont formées dans les segments dentés (7, 8).
EP90107604A 1989-05-05 1990-04-21 Compas à étrier-ressort Expired - Lifetime EP0395971B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8905644U 1989-05-05
DE8905644U DE8905644U1 (de) 1989-05-05 1989-05-05 Federbügelzirkel

Publications (2)

Publication Number Publication Date
EP0395971A1 EP0395971A1 (fr) 1990-11-07
EP0395971B1 true EP0395971B1 (fr) 1993-08-11

Family

ID=6838962

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90107604A Expired - Lifetime EP0395971B1 (fr) 1989-05-05 1990-04-21 Compas à étrier-ressort

Country Status (2)

Country Link
EP (1) EP0395971B1 (fr)
DE (2) DE8905644U1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4014927A1 (de) * 1990-05-10 1991-11-28 Intertech Zeichengeraete Guent Getriebe fuer einen zirkelkopf
DE9101209U1 (de) * 1991-02-02 1991-04-25 M. Seelig KG Reißzeugfabrik, 8535 Emskirchen Federbügelzirkel
DE4205072A1 (de) * 1991-02-23 1992-08-27 Emskirchen Reisszeugfabrik Zirkel

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2296279A (en) * 1941-06-17 1942-09-22 Miles H Hamilton Beam compass
CH524479A (de) * 1971-09-22 1972-06-30 Kern & Co Ag Geradführung an einem Zirkel
AU508333B2 (en) * 1976-11-19 1980-03-20 Helix Limited Drawing instrument
US4120092A (en) * 1977-04-11 1978-10-17 Hanson Goodwin F Plastic injection molded bow compass
DE3838473C1 (en) * 1988-03-15 1989-06-01 Intertech Zeichengeraete Guenther Partes Kg, 8535 Emskirchen, De Fine adjustment compass
DE3808511C1 (en) * 1988-03-15 1989-05-11 Intertech Zeichengeraete Guenther Partes Kg, 8535 Emskirchen, De Fine-adjustment compass

Also Published As

Publication number Publication date
EP0395971A1 (fr) 1990-11-07
DE59002255D1 (de) 1993-09-16
DE8905644U1 (de) 1990-09-06

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