EP0005573A1 - Protractor head for drawing board - Google Patents

Protractor head for drawing board Download PDF

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Publication number
EP0005573A1
EP0005573A1 EP79200232A EP79200232A EP0005573A1 EP 0005573 A1 EP0005573 A1 EP 0005573A1 EP 79200232 A EP79200232 A EP 79200232A EP 79200232 A EP79200232 A EP 79200232A EP 0005573 A1 EP0005573 A1 EP 0005573A1
Authority
EP
European Patent Office
Prior art keywords
plate
teeth
plates
rapporteur
toothed
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Withdrawn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
EP79200232A
Other languages
German (de)
French (fr)
Inventor
Alain Maurice Bruneau
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.)
Alpia SA
Original Assignee
Alpia SA
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 Alpia SA filed Critical Alpia SA
Publication of EP0005573A1 publication Critical patent/EP0005573A1/en
Withdrawn legal-status Critical Current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
    • B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
    • B43L13/02—Draughting machines or drawing devices for keeping parallelism
    • B43L13/08—Protractor heads

Definitions

  • the invention relates to drawing devices, particularly a rapporteur group for drawing board comprising, on either side of a support, two parts, connected to each other by a hub passing through said support, consisting on the one hand of a rule holder and on the other hand a handle which rotates a graduated plate opposite at least one scale.
  • Known devices have a certain number of predetermined angular positions, generally from 15 ° to 15 ° , and the snap-fastening in the chosen position is obtained by the placement of a pawl in a notch of a suitable crown.
  • the object of the present invention is to produce a precise snap-fastening, easy to engage in each predetermined angular position, without play and of long duration, the manufacture of which does not present any particular difficulties.
  • each of said parts comprises a circular toothed plate concentric with its axis of rotation, rotating in the same plane, each provided with the same number of radial teeth, and by the fact that a third circular plate, identically toothed, concentric with the other two, is provided with means making it possible to interpose its teeth between those of the other plates, so as to block the rule carrier in a determined angular position.
  • the main advantage of the reporter group according to the invention resides in the fact that the snap-fastening is achieved by the engagement of all the teeth of the intermediate plate in all the teeth of the other two plates, thus ensuring high precision protected from games due to long use.
  • the reporter group according to the invention essentially consists of a so-called fixed part comprising a rule holder A, a pad B carried by a support C 'which is provided with a toothed plate 1, and a rotating part comprising a handle D provided with a toothed plate 2 pivoting around a hub E.
  • the plates 1 and 2 are concentric with the hub E and in the same plane, parallel to the rules.
  • a third plate 3 identically toothed, concentric and parallel to the plates 1 and 2, movable between said plates perpendicular to the hub E, pushed towards the plate 1 by springs 4, meshes with the plates 1, 2 and makes them integral.
  • This plate 3 movable along the hub E, is suspended from a plate 7 by columns 8 passing through the base 9 of the control handle D and rotating with it.
  • the upward or downward movements of the plate 3 are obtained by a pressure exerted on a pusher 5 integrated in the handle D.
  • the translation of the pusher 5 acts on a lever 6 whose support point 60 is located on the base 9, below of the plate 7.
  • the arm 61 of the lever 6 pivots on a pin 51 of the pusher 5 and passes through an oblong opening 70 of the plate 7 so that its short arm 62 presses on the center 71 of plate 7 and lift it.
  • a recess 50 of the pusher 5 allows the support force to be maintained by the installation of a latch 10 in said recess.
  • the plate 3 can thus be kept clear to allow upe faster rotation of the rules.
  • the plate 3 By unlocking the pusher 5 the plate 3 will be pushed towards the fixed plate 1 and the teeth of one will mesh in the teeth of the other at the same time as in the teeth of the pivoting plate 2.
  • the snap-in position chosen predetermined will be maintained by all the teeth of the plates 1,2,3 whose contact surfaces are proportional to the number of teeth, which represents an important advantage compared to the pawl of known devices.
  • FIG. 2 represents an embodiment of the invention comprising an orientable zero.
  • the width of the teeth of the intermediate plate 3 is equal to the sum of the widths of the teeth of the two other plates 1,2.
  • the contact surface of the teeth of the intermediate plate 3 is substantially equal to the sum of the surfaces of the teeth of the other two plates 1,2.

Landscapes

  • A Measuring Device Byusing Mechanical Method (AREA)
  • Drawing Aids And Blackboards (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)
  • Food-Manufacturing Devices (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Toys (AREA)

Abstract

Sur une tête d'appareil à dessiner classique, les moyens d'encliquetage sont constitués par un plateau circulaire denté 1, solidaire du porte-règle, un plateau circulaire 2 solidaire de la poignée tournante, les plateaux 1,2 étant concentriques et tournant dans un même plan, et par un troisième plateau denté 3, poussé vers les règles par des ressorts 4 qui s'engrène sur les plateaux 1 et 2 en les rendant solidaires. Ce plateau 3 est mobile le long d'un moyeu E, perpendiculairement à l'axe dudit moyeu; il peut être dégagé des plateaux 1 et 2 en exerçant une pression sur un poussoir 5 qui actionne un levier 6 lequel soulève une plaquette 7 reliée au plateau 3 par des colonnes 8.On a conventional drawing machine head, the latching means consist of a toothed circular plate 1, secured to the rule holder, a circular plate 2 secured to the rotating handle, the plates 1,2 being concentric and rotating in the same plane, and by a third toothed plate 3, pushed towards the rules by springs 4 which meshes on the plates 1 and 2 by making them integral. This plate 3 is movable along a hub E, perpendicular to the axis of said hub; it can be released from the plates 1 and 2 by exerting pressure on a pusher 5 which actuates a lever 6 which lifts a plate 7 connected to the plate 3 by columns 8.

Description

L'invention concerne les appareils à dessiner, particulièrement un groupe rapporteur pour planche à dessiner comprenant, de part et d'autre d'un support, deux parties, reliées entre elles par un moyeu traversant ledit support, constituées d'une part d'un porte-règles et d'autre part d'une poignée qui entraîne en rotation un plateau gradué en regard d'au moins une échelle.The invention relates to drawing devices, particularly a rapporteur group for drawing board comprising, on either side of a support, two parts, connected to each other by a hub passing through said support, consisting on the one hand of a rule holder and on the other hand a handle which rotates a graduated plate opposite at least one scale.

Les appareils connus comportent un certain nombre de positions angulaires prédéterminées, en général de 15° en 150, et l'encliquetage dans la position choisie est obtenu par la mise en place d'un cliquet dans un cran d'une couronne adéquate.Known devices have a certain number of predetermined angular positions, generally from 15 ° to 15 ° , and the snap-fastening in the chosen position is obtained by the placement of a pawl in a notch of a suitable crown.

D'autres constructeurs ont réalisé cet indexage à l'aide de billes poussées par des ressorts dans des trous également répartis à la périphérie d'un plateau circulaire.Other manufacturers have carried out this indexing using balls pushed by springs in holes also distributed at the periphery of a circular plate.

Les dispositifs connus ont en commun les mêmes diffi- cuités à résoudre :

  • - la fabrication de roues crantées précises ;
  • - l'élimination du jeu de fonctionnement.
The known devices have in common the same difficulties. cooked to solve:
  • - the manufacture of precise toothed wheels;
  • - elimination of the operating clearance.

Le but de la présente invention consiste à réaliser un encliquetage précis, aisé à enclencher dans chaque position angulaire prédéterminée, sans jeu et de longue durée dont la fabrication ne présente pas de difficultés particulières.The object of the present invention is to produce a precise snap-fastening, easy to engage in each predetermined angular position, without play and of long duration, the manufacture of which does not present any particular difficulties.

A cette fin, le groupe rapporteur selon l'invention est caractérisé par le fait que chacune desdites parties comporte un plateau circulaire denté concentrique à son axe de rotation, tournant dans un même plan, muni chacun du même nombre de dents radiales, et par le fait qu'un troisième plateau circulaire, identiquement denté, concentrique aux deux autres, est pourvu de moyens permettant d'interposer ses dents entre celles des autres plateaux, de façon à bloquer le porte-règles dans une position angulaire déterminée.To this end, the rapporteur group according to the invention is characterized in that each of said parts comprises a circular toothed plate concentric with its axis of rotation, rotating in the same plane, each provided with the same number of radial teeth, and by the fact that a third circular plate, identically toothed, concentric with the other two, is provided with means making it possible to interpose its teeth between those of the other plates, so as to block the rule carrier in a determined angular position.

Le principal avantage du groupe rapporteur selon l'invention réside dans le fait que l'encliquetage est réalisé par l'engagement de toutes les dents du plateau intermédiaire dans toutes les dents des deux autres plateaux, assurant ainsi une grande précision à l'abri des jeux dûs à un long usage.The main advantage of the reporter group according to the invention resides in the fact that the snap-fastening is achieved by the engagement of all the teeth of the intermediate plate in all the teeth of the other two plates, thus ensuring high precision protected from games due to long use.

D'autres avantages ressortiront de la description d'une forme de réalisation, préférentielle mais non limitative, et du dessin dans lequel : 4

  • la figure 1 est une vue en coupe,
  • la figure 2 est une vue en coupe d'une variante d'exécution.
  • La figure 3 est une vue en perspective des moyens d'encliquetage.
Other advantages will emerge from the description of an embodiment, preferential but not limiting, and from the drawing in which: 4
  • FIG. 1 is a sectional view,
  • Figure 2 is a sectional view of an alternative embodiment.
  • Figure 3 is a perspective view of the latching means.

Le groupe rapporteur selon l'invention est constitué essentiellement d'une partie dite fixe comportant un porte règle A, un coussinet B porté par un support C ' lequel est pourvu d'un plateau denté 1, et d'une partie tournante comportant une poignée D munie d'un plateau denté 2 pivotant autour d'un moyeu E.The reporter group according to the invention essentially consists of a so-called fixed part comprising a rule holder A, a pad B carried by a support C 'which is provided with a toothed plate 1, and a rotating part comprising a handle D provided with a toothed plate 2 pivoting around a hub E.

Les plateaux 1 et 2 sont concentriques au moyeu E et dans un même plan, parallèle aux règles.The plates 1 and 2 are concentric with the hub E and in the same plane, parallel to the rules.

Un troisième plateau 3, identiquement denté, concentrique et parallèle aux plateaux 1 et 2, déplaçable entre lesdits plateaux perpendiculairement au moyeu E, poussé vers le plateau 1 par des ressorts 4, s'engrène sur les plateaux 1,2 et les rend solidaires.A third plate 3, identically toothed, concentric and parallel to the plates 1 and 2, movable between said plates perpendicular to the hub E, pushed towards the plate 1 by springs 4, meshes with the plates 1, 2 and makes them integral.

Ce plateau 3, mobile le long du moyeu E, est suspendu à une plaquette 7 par des colonnes 8 traversant la base 9 de la poignée de commande D et tournant avec elle.This plate 3, movable along the hub E, is suspended from a plate 7 by columns 8 passing through the base 9 of the control handle D and rotating with it.

Les mouvements ascendants ou descendants du plateau 3 sont obtenus par une pression exercée sur un poussoir 5 intégré dans la poignée D. La translation du poussoir 5 agit sur un levier 6 dont le point d'appui 60 est situé sur la base 9, en dessous de la plaquette 7. Le bras 61 du levier 6 pivote sur un tourillon 51 du poussoir 5 et passe à travers une ouverture oblongue 70 de la plaquette 7 de façon que son bras 62 court appuie sur le centre 71 de la plaque 7 et la soulève.The upward or downward movements of the plate 3 are obtained by a pressure exerted on a pusher 5 integrated in the handle D. The translation of the pusher 5 acts on a lever 6 whose support point 60 is located on the base 9, below of the plate 7. The arm 61 of the lever 6 pivots on a pin 51 of the pusher 5 and passes through an oblong opening 70 of the plate 7 so that its short arm 62 presses on the center 71 of plate 7 and lift it.

Un décrochement 50 du poussoir 5 permet le maintien de la force d'appui par la mise en place d'un loquet 10 dans ledit décrochement.A recess 50 of the pusher 5 allows the support force to be maintained by the installation of a latch 10 in said recess.

Le plateau 3 peut ainsi être maintenu dégagé pour permettre upe rotation plus rapide des règles.The plate 3 can thus be kept clear to allow upe faster rotation of the rules.

En débloquant le poussoir 5 le plateau 3 sera poussé vers le plateau fixe 1 et les dents de l'un s'engrèneront dans les dents de l'autre en même temps que dans les dents du plateau pivotant 2. L'encliquetage dans la position prédéterminée choisie sera maintenu par toutes les dents des plateaux 1,2,3 dont les surfaces en contact sont proportionnelles au nombre de dents, ce qui représente un avantage important par rapport au cliquet des appareils connus.By unlocking the pusher 5 the plate 3 will be pushed towards the fixed plate 1 and the teeth of one will mesh in the teeth of the other at the same time as in the teeth of the pivoting plate 2. The snap-in position chosen predetermined will be maintained by all the teeth of the plates 1,2,3 whose contact surfaces are proportional to the number of teeth, which represents an important advantage compared to the pawl of known devices.

Quel que soit l'angle choisi pour l'encliquetage, la totalité des dents des plateaux 1,2,3 est engagée et il en résulte à la fois une grande précision et une excellente fiabilité.Whatever the angle chosen for the snap-in, all of the teeth of the plates 1,2,3 are engaged and this results in both high precision and excellent reliability.

La figure 2 représente une forme d'exécution de l'invention comportant un zéro orientable.FIG. 2 represents an embodiment of the invention comprising an orientable zero.

Dans les deux cas décrits, la largeur des dents du plateau, intermédiaire 3 est égale à la somme des largeurs des dents des deux autres plateaux 1,2.In the two cases described, the width of the teeth of the intermediate plate 3 is equal to the sum of the widths of the teeth of the two other plates 1,2.

La surface de contact des dents du plateau intermédiaire 3 est sensiblement égale à la somme des surfaces des dents des deux autres plateaux 1,2.The contact surface of the teeth of the intermediate plate 3 is substantially equal to the sum of the surfaces of the teeth of the other two plates 1,2.

Claims (5)

1. Groupe rapporteur pour planche à dessiner comprenant, de part et d'autre d'un support, deux parties, reliées entre elles par un moyeu traversant ledit support, constituées d'une part d'un porte-règles et d'autre part d'une poignée qui entraîne en rotation un plateau gradué en regard d'au moins une échelle, caractérisé par le fait que chacune desdites parties comporte un plateau circulaire denté concentrique à son axe de rotation, tournant dans un même plan, muni chacun du même nombre de dents radiales et par le fait qu'un troisième plateau circulaire, identiquement denté, concentrique aux deux autres, mobile perpendiculairement au moyeu, est pourvu de moyens permettant d'interposer ses dents entre celles des autres plateaux de façon à bloquer le porte-règles dans une position angulaire déterminée.1. Protractor group for drawing board comprising, on either side of a support, two parts, connected to each other by a hub passing through said support, consisting on the one hand of a rule holder and on the other hand a handle which rotates a graduated plate opposite at least one scale, characterized in that each of said parts comprises a circular toothed plate concentric with its axis of rotation, rotating in the same plane, each provided with the same number of radial teeth and the fact that a third circular plate, identically toothed, concentric with the other two, movable perpendicular to the hub, is provided with means making it possible to interpose its teeth between those of the other plates so as to block the holder rules in a determined angular position. 2. Groupe rapporteur selon la revendication 1, caractérisé par le fait que le troisième plateau denté (3) est poussé vers le plateau inférieur (1) portant les règles par des ressorts (4) prenant appui sur le plateau supérieur (2).2. rapporteur group according to claim 1, characterized in that the third toothed plate (3) is pushed towards the lower plate (1) carrying the rules by springs (4) bearing on the upper plate (2). 3. Groupe rapporteur selon la revendication 2, caractérisé par le fait que les moyens permettant d'interposer les dents des plateaux sont constitués par un poussoir (5) agissant sur une plaquette (7) par un levier (6), ladite plaquette (7) étant reliée au plateau intermédiaire (3) par au moins deux colonnes (8) diamétralement opposées, perpendiculaires aux plans parallèles de la plaquette et dudit plateau.3. rapporteur group according to claim 2, characterized in that the means for interposing the teeth of the plates consist of a pusher (5) acting on a plate (7) by a lever (6), said plate (7 ) being connected to the intermediate plate (3) by at least two diametrically opposite columns (8), perpendicular to the parallel planes of the plate and of said plate. 4. Groupe rapporteur selon la revendication 1, caractérisé par le fait que la largeur des dents du plateau intermédiaire est égale à la somme des largeurs des dents des deux autres plateaux.4. Rapporteur group according to claim 1, characterized in that the width of the teeth of the intermediate plate is equal to the sum of the widths of the teeth of the other two plates. 5. Groupe rapporteur selon la revendication 4, caractérisé par le fait que la surface de contact des dents du plateau intermédiaire est sensiblement égale à la somme des surfaces de contact des dents des deux autres plateaux.5. Rapporteur group according to claim 4, characterized in that the contact surface of the teeth of the intermediate plate is substantially equal to the sum of the contact surfaces of the teeth of the two other plates.
EP79200232A 1978-05-16 1979-05-11 Protractor head for drawing board Withdrawn EP0005573A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7815004 1978-05-16
FR7815004A FR2425947A1 (en) 1978-05-16 1978-05-16 RAPPORTEUR GROUP FOR DRAWING BOARD

Publications (1)

Publication Number Publication Date
EP0005573A1 true EP0005573A1 (en) 1979-11-28

Family

ID=9208491

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79200232A Withdrawn EP0005573A1 (en) 1978-05-16 1979-05-11 Protractor head for drawing board

Country Status (14)

Country Link
US (1) US4359824A (en)
EP (1) EP0005573A1 (en)
JP (1) JPS55500652A (en)
BE (1) BE62T1 (en)
CH (1) CH637575A5 (en)
DE (1) DE2953023C2 (en)
FR (1) FR2425947A1 (en)
GB (1) GB2045448B (en)
IT (1) IT1148298B (en)
NL (1) NL7915023A (en)
OA (1) OA06431A (en)
SE (1) SE8004443L (en)
SU (1) SU1074392A3 (en)
WO (1) WO1979001076A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3136872A1 (en) * 1981-09-17 1983-03-31 Möckel KG Feinmechanik, 6305 Buseck Drawing head for a drawing machine
US5598557A (en) * 1992-09-22 1997-01-28 Caere Corporation Apparatus and method for retrieving and grouping images representing text files based on the relevance of key words extracted from a selected file to the text files

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2708791A (en) * 1947-05-03 1955-05-24 Universal Drafting Machine Cor Drafting machine
DE943396C (en) * 1953-01-25 1956-05-17 Faber Castell A W Adjustment head for drawing machines
US2900728A (en) * 1957-03-11 1959-08-25 Vard Products Inc Drafting machine indexing means

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2708791A (en) * 1947-05-03 1955-05-24 Universal Drafting Machine Cor Drafting machine
DE943396C (en) * 1953-01-25 1956-05-17 Faber Castell A W Adjustment head for drawing machines
US2900728A (en) * 1957-03-11 1959-08-25 Vard Products Inc Drafting machine indexing means

Also Published As

Publication number Publication date
US4359824A (en) 1982-11-23
CH637575A5 (en) 1983-08-15
DE2953023C2 (en) 1983-06-30
IT1148298B (en) 1986-11-26
NL7915023A (en) 1980-08-29
WO1979001076A1 (en) 1979-12-13
SE8004443L (en) 1980-06-16
IT8086256A0 (en) 1980-07-02
FR2425947B1 (en) 1980-10-31
SU1074392A3 (en) 1984-02-15
DE2953023A1 (en) 1980-10-30
BE62T1 (en) 1980-04-25
FR2425947A1 (en) 1979-12-14
JPS55500652A (en) 1980-09-18
GB2045448B (en) 1983-04-20
GB2045448A (en) 1980-10-29
OA06431A (en) 1981-07-31

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Inventor name: BRUNEAU, ALAIN MAURICE