EP0395971A1 - Compas à étrier-ressort - Google Patents

Compas à étrier-ressort Download PDF

Info

Publication number
EP0395971A1
EP0395971A1 EP90107604A EP90107604A EP0395971A1 EP 0395971 A1 EP0395971 A1 EP 0395971A1 EP 90107604 A EP90107604 A EP 90107604A EP 90107604 A EP90107604 A EP 90107604A EP 0395971 A1 EP0395971 A1 EP 0395971A1
Authority
EP
European Patent Office
Prior art keywords
spring clip
compass
legs
spring
free ends
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.)
Granted
Application number
EP90107604A
Other languages
German (de)
English (en)
Other versions
EP0395971B1 (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 Werke Riepe KG
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 Werke Riepe KG, 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 clip with a spring clip with its free ends in engagement with the rear ends of the compass legs and with an adjusting device extending through the compass legs, the rear ends of the compass legs being in supportive engagement with one another.
  • the spring clip In a known spring clip of this type (DE-GM 80 22 805), the spring clip consists of a circular steel 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 Compass legs in To cooperate with the adjusting device having a grub screw in a defined position, the compass legs with their rear ends via a recess provided in one of the compass legs and a provided in the other compass leg, extending into the recess in supporting engagement with each other.
  • the spring clips made of steel used in the known spring clip circuits represent a weak point in the overall circuit structure in that they are subject to oxidation. This cannot be prevented by coatings in the form of chrome plating or nickel plating, because the spring clip deforms repeatedly during operation and the coating thereby becomes at least cracked, if not partially chipped. At the parts of the coating that have become defective, the spring clip then oxidizes, which at least considerably impairs the visual impression of the compass.
  • a spring clip of the type mentioned at the outset is designed according to the invention in such a way that the spring clip is made of plastic, for example fiber-reinforced polyamide, and its material cross section increases continuously from both free ends and to the same extent.
  • the spring clip made of plastic according to the invention has the same spring properties as the otherwise common spring clip made of steel.
  • a problem with spring clip compasses is that when the compass legs are spread apart up to their maximum spread position, the spring clip can detach from its holder and fall off when the spring action of the spring clip has decreased, i.e. the spring clip due to aging, etc. has lost part of its elasticity.
  • projections extending substantially transversely to the plane containing the longitudinal axes of the two compass legs can be provided at the free ends of the spring clip, which engage in the area of the rear ends of the Circular legs are formed, circular arc-shaped guide slots.
  • a peg-shaped handle element can be integrally formed on this outside between its free ends, so that the spring clip and handle element can be produced in one piece in one operation, while previously several work steps were required to produce 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 way, 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 toothed segments consists of two adjacent sections 8 'and 8 vernum, 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 . As is known, this results in a uniform and precise guidance of the tooth segments during the rolling.
  • 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)
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 true EP0395971A1 (fr) 1990-11-07
EP0395971B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661981A1 (fr) * 1990-05-10 1991-11-15 Partes Intertech Kg Mecanisme pour tete de compas.
DE4205072A1 (de) * 1991-02-23 1992-08-27 Emskirchen Reisszeugfabrik Zirkel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9101209U1 (de) * 1991-02-02 1991-04-25 M. Seelig KG Reißzeugfabrik, 8535 Emskirchen Federbügelzirkel

Citations (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
FR2371302A1 (fr) * 1976-11-19 1978-06-16 Helix International Ltd Instrument de dessin
US4120092A (en) * 1977-04-11 1978-10-17 Hanson Goodwin F Plastic injection molded bow compass
DE3808511C1 (en) * 1988-03-15 1989-05-11 Intertech Zeichengeraete Guenther Partes Kg, 8535 Emskirchen, De Fine-adjustment compass
DE3838473C1 (en) * 1988-03-15 1989-06-01 Intertech Zeichengeraete Guenther Partes Kg, 8535 Emskirchen, De Fine adjustment compass

Patent Citations (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
FR2371302A1 (fr) * 1976-11-19 1978-06-16 Helix International Ltd Instrument de dessin
US4120092A (en) * 1977-04-11 1978-10-17 Hanson Goodwin F Plastic injection molded bow compass
DE3808511C1 (en) * 1988-03-15 1989-05-11 Intertech Zeichengeraete Guenther Partes Kg, 8535 Emskirchen, De Fine-adjustment compass
DE3838473C1 (en) * 1988-03-15 1989-06-01 Intertech Zeichengeraete Guenther Partes Kg, 8535 Emskirchen, De Fine adjustment compass

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661981A1 (fr) * 1990-05-10 1991-11-15 Partes Intertech Kg Mecanisme pour tete de compas.
DE4205072A1 (de) * 1991-02-23 1992-08-27 Emskirchen Reisszeugfabrik Zirkel

Also Published As

Publication number Publication date
EP0395971B1 (fr) 1993-08-11
DE59002255D1 (de) 1993-09-16
DE8905644U1 (de) 1990-09-06

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