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EP0165362A1 - Zirkel - Google Patents

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Publication number
EP0165362A1
EP0165362A1 EP84420091A EP84420091A EP0165362A1 EP 0165362 A1 EP0165362 A1 EP 0165362A1 EP 84420091 A EP84420091 A EP 84420091A EP 84420091 A EP84420091 A EP 84420091A EP 0165362 A1 EP0165362 A1 EP 0165362A1
Authority
EP
European Patent Office
Prior art keywords
branches
compass
rod
branch
nut
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.)
Withdrawn
Application number
EP84420091A
Other languages
English (en)
French (fr)
Inventor
Georges Ducellier
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.)
ASSOCIATION DEPARTEMENTALE POUR LE TRAVAIL PROTEGE
Original Assignee
ASSOCIATION DEPARTEMENTALE POUR LE TRAVAIL PROTEGE
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
Priority to FR8220014A priority Critical patent/FR2536343A1/fr
Application filed by ASSOCIATION DEPARTEMENTALE POUR LE TRAVAIL PROTEGE filed Critical ASSOCIATION DEPARTEMENTALE POUR LE TRAVAIL PROTEGE
Priority to EP84420091A priority patent/EP0165362A1/de
Publication of EP0165362A1 publication Critical patent/EP0165362A1/de
Withdrawn legal-status Critical Current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
    • B43L9/16—Features common to compasses, dividers, and callipers
    • B43L9/22—Leg-angle adjusting-means separate from pivots

Definitions

  • the present invention relates to drawing compasses, and more specifically to a new compass head structure for assembling the two branches, a system for fine adjustment and rapid adjustment of the spacing of the branches, as well as a reading system. direct by electronic display of the measurement of the tip spacing.
  • French patent application 913 224 describes a compass head structure comprising an inverted U-shaped yoke provided with two parallel plate-shaped wings connected by a central part receiving a longitudinal screw forming a yoke button.
  • the head further comprises an intermediate piece, inserted between the wings of the yoke, and comprising a threaded bore into which the longitudinal screw penetrates for its connection.
  • the intermediate piece carries two pivot axes on which the ends of the two arms of the compass are adapted.
  • the wings of the yoke are clamped against each other by a transverse screw.
  • This known device requires, for its assembly, the operation of two screws, and leads to relatively delicate manipulations, in particular to insert the longitudinal screw in the bottom of the intermediate piece.
  • the positioning of the various parts is indeed delicate and leads to a significant installation cost.
  • the object of the present invention is in particular to avoid the drawbacks of known devices by proposing a new compass head structure requiring only one screw for assembly, and comprising guide means considerably facilitating the positioning of the pieces compared to others during assembly.
  • the assembly is carried out simply and quickly by embedding.
  • the single screw simultaneously maintains the assembly and blocks the arms of the compass.
  • the compass according to the invention is provided with a device allowing the pivoting of the branches to be blocked.
  • the compass further comprises a quick adjustment system and a fine adjustment system for the spacing of the branches, these adjustment systems being particularly simple in that they comprise a minimum number of rooms. This reduces the manufacturing difficulties existing in known similar devices.
  • the structure of the compass makes it possible to produce the parts by molding of plastic material possibly loaded with glass or carbon fibers.
  • the particular constitution of the compass makes it possible to achieve an operating precision as good as in known devices made of metal.
  • the structure allows the adaptation of a device for reading and electronic display of the spacing of the branches, allowing good reading accuracy and great speed of use.
  • the particular shape of the different parts of the compass allows their manufacture by molding plastic material using relatively simple and very resistant molds.
  • the particular structure of the spacing adjustment device allows the production of very rigid compasses, ensuring precise adjustment of the spacing.
  • the present invention provides a head of a compass comprising an inverted U-shaped yoke provided with two parallel plate-shaped wings, connected together by a central part integral with an extension forming a clevis button; the head comprises an intermediate piece on which the ends of the branches are articulated by means of two pivot axes; one of the wings of the yoke is provided with an internal groove, and the intermediate piece consists of a plate capable of being inserted in translation and locked in rotation in said groove.
  • the ends of the two branches are provided with passage holes suitable for receiving the pivot axes, the axes being carried by the intermediate piece.
  • the fact of providing the axes on the intermediate piece and not on the ends of the branches makes it possible to avoid weakening the molds used for the manufacture of the branches.
  • the compass head comprises a single transverse screw, blocked in rotation and in translation by its head of polygonal section embedded in a first wing of the clevis, the rod of the screw passing through a hole in the intermediate piece, passing between the two branches, passing through a hole in the second wing and receiving a nut which comes to bear by screwing against the outer face of the second wing.
  • the screw thus ensures the locking in translation of the intermediate piece and its final assembly, and simultaneously ensures the pivoting locking of the branches by screwing the nut and tightening the wings against the lateral faces of the branches.
  • each of the branches has an intermediate articulation of transverse axis parallel to the pivot axis and connecting a first part of a branch articulated to the head and a second part of a branch.
  • the second parts of the branches are connected by an opening adjustment device comprising a rod passing through a rod clamp guide secured to a first branch, the rod being screwed into a nut secured to the second branch.
  • the rod simultaneously ensures the opening adjustment of the branches and the parallel holding of the second parts of branches, so as to allow great accuracy in spacing the compass.
  • the arms of the compass may be non-articulated and connected by an opening adjustment device comprising a rod passing through a rod clamp rotatably mounted on a first branch along an axis parallel to the pivot axis; the rod is screwed into a nut comprising a portion with a spherical outer surface journalling in a spherical housing of the second branch.
  • an opening adjustment device comprising a rod passing through a rod clamp rotatably mounted on a first branch along an axis parallel to the pivot axis; the rod is screwed into a nut comprising a portion with a spherical outer surface journalling in a spherical housing of the second branch.
  • the rod is provided with marks
  • the second branch of the compass is provided with an electronic reading and counting device for reading the marks and counting them when they are scrolled in front of the reading device ;
  • a digital display device indicates to the user the result of the count, reflecting the value of the spacing of the free ends of the branches.
  • the compass head comprises a yoke 1 in the form of an inverted U, comprising two parallel wings 1a and 1b, each in the form of a plate, connected to one another by a part central lc integral with an extension ld forming a clevis button.
  • One of the wings lb of the yoke 1 is provided with an inner groove 2 longitudinal, that is to say parallel to the axis of symmetry of the U, the groove having edges that are substantially parallel and of substantially constant depth.
  • the head further comprises an intermediate piece 3 consisting of a clean rectangular plate to be inserted with a slight lateral clearance in the groove 2, the edges of the groove as well as the central part lc of the yoke preventing its rotation.
  • the thickness of the intermediate piece is substantially equal to the depth of the groove 2, the assembly having substantially the same thickness as the wing 1a of the yoke.
  • the intermediate part 3 carries, on one of its two faces, two pivot axes 4 and 5, and a central hole 6.
  • the central hole 6 is aligned, when the intermediate part 3 is fully inserted into the groove 2, with a hole 12 and a hole 13 formed respectively in the wing la and in the wing lb of the yoke 1.
  • the axes 4 and 5 are offset on the same side of the intermediate part 3 by relative to the central hole 6.
  • the compass comprises two branches 7 and 8 articulated on the intermediate piece 3 at their first end, respectively 9 and 10.
  • the first ends 9 and 10 each include a through hole, respectively 9a and 10a, to receive the axes with little play 4 and 5.
  • the first end, respectively 9 and 10, of each of the branches has transverse ribs forming a toothed sector, respectively 9b and 10b, meshing with the toothed sector of the other branch to center the yoke according to the bisector branches 7 and 8.
  • the compass head also comprises a transverse screw 11, the head 11a of which has a polygonal section intended to be housed in the hole 12 of the wing 1a for keeping it in translation and in rotation, the hole 12 having a recess of polygonal section complementary.
  • the screw 11 has a length greater than the thickness of the yoke 1 to pass completely through the holes 12 and 13, and receives at its threaded end llb a nut 14.
  • the mounting of the head is carried out as follows: first of all, the two branches 7 and 8 are adapted on the axes 4 and 5 of the intermediate piece, the axes 4 and 5 having an adequate spacing so that the toothed sectors 9b and lOb mesh practically without play.
  • the inherent elasticity of the intermediate piece 3 allows the reduction of play and promotes precision without requiring excessive manufacturing tolerances of the pieces.
  • the intermediate piece-branches 7 and 8 assembly is then inserted by longitudinal translation into the yoke 1, the intermediate piece 3 being disposed on the side of the groove 2. If necessary, the free end of the wings 1a and 1b is slightly separated. facilitate this introduction.
  • the intermediate piece 3 is arranged in the position such that the axes 4 and 5 are located on the same side as the central part 1c of the yoke relative to the central hole 6 of the intermediate piece.
  • the offset between the axes 4 and 5 and the central hole 6 is sufficient so that the screw 11 can be introduced between the branches 7 and 8.
  • the assembly and the locking in translation of the intermediate piece 3 is ensured by introduction of the screw 11 in the hole 12, passing between the arms 7 and 8 of the compass, passing through the central hole 6 then the hole 13 of the wing lb, and by adaptation of the nut 14 on its threaded end llb.
  • the screw 11 and the nut 14 ensure simultaneously locking in translation of the intermediate piece and tightening the wings 1a and 1b against the lateral faces of the branches 7 and 8. It is preferably possible to provide flat lateral faces for the two branches 7 and 8.
  • the introduction of the intermediate piece-branches 7 and 8 assembly is then carried out laterally by one of the sides of the yoke.
  • the branches 7 and 8 are left free, held by the axes 4 and 5 and by the pressure of the wings la and lb under the action of the screw 11 and the nut 14.
  • the branches 7 and 8 are connected by an opening adjustment device, for example a device shown in Figures 2 to 6.
  • the opening adjustment device comprises a knurled button nut 15 secured to a portion 16 with a spherical outer surface swiveling in a spherical housing 17 of the branch 7.
  • the spherical housing 17 is provided with two passage notches 18 and 19 to allow the oscillation of a rod 20 screwing into nut 15-16.
  • the threaded rod 20 passes through a rod clamp 21 integral with the branch 8, the rod clamp 21 being rotatably mounted relative to the branch 8 along a transverse axis parallel to the pivot axes 4 and 5.
  • the rod clamp 21 comprises a threaded portion 21a passing through a hole in the branch 8 and onto which a nut 24 is fitted, the screwing of which enables the rod 20 to be pressed against a washer 23 for blocking the rod.
  • FIGS. 7 to 9 represent a preferred embodiment of the device for adjusting the opening of the compass.
  • the rods have a central bulge 7a and 8a in which is formed a lumen, respectively 7b and 8b.
  • the slots 7b and 8b are limited by two longitudinal walls, respectively 7c, 7d and 8c, 8d, substantially perpendicular to the pivot axes 4 and 5, and by oblique end walls, such as the walls 7e, 7f and 8e, 8f, shown in FIG. 7, allowing the free movement of the rod 20 during the pivoting of the branches 7 and 8 relative to one another.
  • the longitudinal walls 7c and 7d of the light 7b each have a hollow, respectively 7g and 7h, in a spherical cap for receiving the spherical outer surface portion 16 of a nut provided with a knurled button 15.
  • a rod 20 has a first threaded end engaging in the nut 15-16, its second end passing through the lumen 8b of the branch 8 in which it is fixed by a clamp 21a.
  • the stem clamp 21a comprises a stem 21b comprising a central hole 21e for the passage of the stem 20, the stem 21b ending at one end by a head 21c resting on a first face of the branch 8 , and receives at its other threaded end a tightening nut 21d.
  • the branches 7 and 8 are produced by molding a plastic material loaded with glass or carbon fibers.
  • the assembly of the spherical part 16 of the nut in the light 7b is effected by overmolding of the branch 7 on the spherical part 16.
  • the mold has protuberances to hold the spherical part 16, at the same time defining the light 7b.
  • the withdrawal of the material forming the branch 7, after injection allows a smooth adjustment, without play, by elastic support of the recesses 7g and 7h on the spherical part 16.
  • each of the arms 7 and 8 of the compass comprises an intermediate articulation, respectively 32 and 33, of transverse axis parallel to the pivot axes 4 and 5, and connecting a first part, respectively 32a and 33a articulated to the compass head and a second part, respectively 32b and 33b.
  • the second parts 32b and 33b are connected by an opening adjustment device comprising a rod 20 secured to the second part 32b by a device 28 ensuring the guiding function and the function of rod clamp, the rod 20 being screwed into a nut 29 providing fine adjustment.
  • the nut 29 has a threaded part integral in translation with the second part 33b of the branch 8.
  • a threaded tube 30, sliding on the rod 20 has a slot and a 'conical part; a knurled nut 31, thanks to its conical bearing, ensures the pinching of the tube on the rod and its immobilization.
  • the rotation of the knurled nut 29 ensures fine adjustment of the spacing, the rod 20 simultaneously ensuring the parallel maintenance of the second parts 32b and 33b.
  • the rod 20 is provided with pins 34, and the branch 8 carries a reading device and electronic counting to read the marks and count them when they scroll in front of the reading device.
  • a sensor 27 is shown diagrammatically ensuring the reading of the marks carried on the rod 20, the sensor 27 sending electrical signals to a counting device itself producing information sent to a digital display device 26 indicating to the user the counting result.
  • This counting result reflects the value of the spacing of the free ends of the branches.
  • a reset device makes it possible to reset the counter voluntarily to zero when the free ends of the branches have a given spacing, for example a zero spacing.

Landscapes

  • Pivots And Pivotal Connections (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)
EP84420091A 1982-11-18 1984-05-18 Zirkel Withdrawn EP0165362A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR8220014A FR2536343A1 (fr) 1982-11-18 1982-11-18 Systeme d'assemblage et procede de realisation de compas permettant le blocage de la tete, le reglage rapide et fin ainsi que la lecture directe par affichage electronique de l'ecartement des branches
EP84420091A EP0165362A1 (de) 1982-11-18 1984-05-18 Zirkel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8220014A FR2536343A1 (fr) 1982-11-18 1982-11-18 Systeme d'assemblage et procede de realisation de compas permettant le blocage de la tete, le reglage rapide et fin ainsi que la lecture directe par affichage electronique de l'ecartement des branches
EP84420091A EP0165362A1 (de) 1982-11-18 1984-05-18 Zirkel

Publications (1)

Publication Number Publication Date
EP0165362A1 true EP0165362A1 (de) 1985-12-27

Family

ID=26095508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84420091A Withdrawn EP0165362A1 (de) 1982-11-18 1984-05-18 Zirkel

Country Status (2)

Country Link
EP (1) EP0165362A1 (de)
FR (1) FR2536343A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3990155C1 (de) * 1988-03-04 1998-08-06 Klaus Juergen Kiefer Meßzirkel
DE19802280A1 (de) * 1998-01-22 1999-07-29 Alexander Lehn Zirkel mit integrierter Messeinrichtung
GB2408020A (en) * 2003-11-11 2005-05-18 Erik Juel-Jacobsen Pair of compasses with computer for measurement of angle subtended by legs
CN102963179A (zh) * 2012-12-13 2013-03-13 叶晓东 一种可变速的便利圆规

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2656256B1 (fr) * 1989-12-22 1992-04-24 Maped Tete de compas de dessin.
FR2656257B1 (fr) * 1989-12-22 1993-11-19 Maped Dispositif de serrage pour mine ou pointe seche de compas.
WO1996022889A1 (en) * 1995-01-26 1996-08-01 Richard Dieter Buschle Compass
FR2733184B1 (fr) * 1995-04-21 1997-05-23 Courrin Gil Compas perfectionne de tracage
CN113085416B (zh) * 2018-10-27 2022-09-23 山东汇融电子设备有限公司 一种作图用圆规及使用方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE5905C (de) * H. SCHMIDT, Mechaniker, in Berlin, Grüner Weg 47 Stellvorrichtung zur vertikalen Führung von Zirkelspitzen
FR440285A (fr) * 1912-02-17 1912-07-06 Louis Claude Marie Laurin Compas à tire-ligne permettant de tracer automatiquement les traits de force des cercles
FR913224A (fr) * 1943-11-20 1946-09-02 Vente Des Instr De Geodesie He Guidage perpendiculaire pour compas
FR983774A (fr) * 1948-04-19 1951-06-27 Règle pour le dessin et la mesure des dimensions
CH302177A (de) * 1952-05-07 1954-10-15 Chr Lotter Johann Teilzirkel.
FR2080178A5 (de) * 1968-08-22 1971-11-12 Staedtler J S
FR2222225A1 (en) * 1973-03-23 1974-10-18 Pascal & Cie Francois Drawing compasses with guided head - have an inverted U-section containing meshed toothed segments supporting the compass legs
DE2852898A1 (de) * 1978-12-07 1980-06-19 Christian Siebenhaar & Co Inha Zirkel

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1592505A (de) * 1968-05-03 1970-05-19
DE2718627C2 (de) * 1977-04-27 1981-04-16 Rotring-Werke Riepe Kg, 2000 Hamburg Zirkelkopf für einen Federbügelzirkel

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE5905C (de) * H. SCHMIDT, Mechaniker, in Berlin, Grüner Weg 47 Stellvorrichtung zur vertikalen Führung von Zirkelspitzen
FR440285A (fr) * 1912-02-17 1912-07-06 Louis Claude Marie Laurin Compas à tire-ligne permettant de tracer automatiquement les traits de force des cercles
FR913224A (fr) * 1943-11-20 1946-09-02 Vente Des Instr De Geodesie He Guidage perpendiculaire pour compas
FR983774A (fr) * 1948-04-19 1951-06-27 Règle pour le dessin et la mesure des dimensions
CH302177A (de) * 1952-05-07 1954-10-15 Chr Lotter Johann Teilzirkel.
FR2080178A5 (de) * 1968-08-22 1971-11-12 Staedtler J S
FR2222225A1 (en) * 1973-03-23 1974-10-18 Pascal & Cie Francois Drawing compasses with guided head - have an inverted U-section containing meshed toothed segments supporting the compass legs
DE2852898A1 (de) * 1978-12-07 1980-06-19 Christian Siebenhaar & Co Inha Zirkel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3990155C1 (de) * 1988-03-04 1998-08-06 Klaus Juergen Kiefer Meßzirkel
DE19802280A1 (de) * 1998-01-22 1999-07-29 Alexander Lehn Zirkel mit integrierter Messeinrichtung
GB2408020A (en) * 2003-11-11 2005-05-18 Erik Juel-Jacobsen Pair of compasses with computer for measurement of angle subtended by legs
GB2408020B (en) * 2003-11-11 2007-06-06 Erik Juel-Jacobsen Measurement device
CN102963179A (zh) * 2012-12-13 2013-03-13 叶晓东 一种可变速的便利圆规

Also Published As

Publication number Publication date
FR2536343A1 (fr) 1984-05-25

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19860429

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Effective date: 19870811

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Effective date: 19880322

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Inventor name: DUCELLIER, GEORGES