FR2512398A1 - Travelling straight edge for drawing board - maintains alignment with resistance to movement reduced by mounting each end on two wheels - Google Patents

Travelling straight edge for drawing board - maintains alignment with resistance to movement reduced by mounting each end on two wheels Download PDF

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Publication number
FR2512398A1
FR2512398A1 FR8117286A FR8117286A FR2512398A1 FR 2512398 A1 FR2512398 A1 FR 2512398A1 FR 8117286 A FR8117286 A FR 8117286A FR 8117286 A FR8117286 A FR 8117286A FR 2512398 A1 FR2512398 A1 FR 2512398A1
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France
Prior art keywords
rule
square
wheels
drawing board
mounting
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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Withdrawn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
FR8117286A
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French (fr)
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Individual
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Individual
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Publication date
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Priority to FR8117286A priority Critical patent/FR2512398A1/en
Publication of FR2512398A1 publication Critical patent/FR2512398A1/en
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L13/00Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
    • B43L13/02Draughting machines or drawing devices for keeping parallelism
    • B43L13/04Guides for rulers
    • B43L13/045Guides for rulers with carriages
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L13/00Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
    • B43L13/02Draughting machines or drawing devices for keeping parallelism
    • B43L13/04Guides for rulers
    • B43L13/043Guides for rulers with squares

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  • Drawing Aids And Blackboards (AREA)

Abstract

The movable rule (1) with a set alignment is incorporated in a draughting machine, each of its ends being mounted on two wheels (6). The arrangement reduces the effort required by the draughtsman to move the rule over the drawing board (14). The offset of the rule above the table can be adjusted by manipulating two milled wheels (9), a square with an horizontal and a vertical graduated scale being provided. One handed manipulation of both the square and rule may be contrived by providing the square with a handle and the leg of the square may have a vertical scale on each edge with the line of the top edge of the arm forming both datum points.

Description

Les regles autoparalleles actuelles sont d'un emploi peu agréable, Cdr leur déplacement nécessite un certain effort. The current autoparalleles rules are not very pleasant to use, Cdr their displacement requires a certain effort.

Cet effort est particulièrement important lorsque la table à dessin est dans une position proche de l'horizontale. This effort is particularly important when the drawing table is in a position close to the horizontal.

Un deuxième inconvénient des règles autoparallèles est le fait qu'elles doivent être complétées par l'emploi d'une équerre et d'une règle graduée, qui obligent le dessinateur à un plus grand nombre de mouvements que l'utilisation d'un appareil à dessiner qui est plus mobile et qui se déplace pratiquement sans effort. A second disadvantage of autoparallel rules is the fact that they must be supplemented by the use of a square and a graduated rule, which oblige the designer to a greater number of movements than the use of a device to draw who is more mobile and who moves almost effortlessly.

Les perfectionnements, objet de la présente invention, suppriment ces deux inconvénients, tout en conservant aux règles parallèles, l'avantage sur les appareils à dessiner, d'une plus grande facilité dans le tracé des longues lIgnes horizontales. The improvements, object of the present invention, eliminate these two drawbacks, while retaining the parallel rules, the advantage over the drawing apparatus, of greater ease in the drawing of long horizontal lines.

L'effort nécessaire au déplacement des règles actuelles a deux causes - le frottement de la règle sur la table à dessin.  The effort required to move the current rulers has two causes - the friction of the ruler on the drawing table.

- la tension importante des câbles qui crée des frottements, également im
portants, des poulies sur leurs axes.
- the high tension of the cables which creates friction, also im
bearing, pulleys on their axes.

La suppression du frottement de la règle sur la table a été obtenue, en équipant la règle, à chacune de ses extrémités, de 2 galets de roulement qui la maintiennent a quelques dizièmes de millimètre au-dessus de la table à dessin. The elimination of the friction of the ruler on the table was obtained, by equipping the ruler, at each of its ends, with 2 rollers which hold it a few tenths of a millimeter above the drawing table.

Ce perfectionnement remplace le frottement de la règle sur la table par un roulement qui ne demande aucun effort de la part de l'utilisateur. This improvement replaces the friction of the rule on the table with a roll which requires no effort on the part of the user.

La tension des câbles, dans les regles actuelles, est crée par la masse des contrepoids d'équilibrage, masse qui n'est supportée que par les câbles eux-memes. Lorsque ces câbles sont dans la position horizontale, les masses des contrepoids transmettent aux câbles des efforts très importants, du fait de la décomposition des forces. The tension of the cables, in the current rules, is created by the mass of the balancing counterweights, a mass which is only supported by the cables themselves. When these cables are in the horizontal position, the masses of the counterweights transmit very significant forces to the cables, due to the decomposition of the forces.

Ces efforts expliquent les tensions exagérées des câbles,.leur gros diamètre et les frottements importants des poulies sur leurs axes. These efforts explain the exaggerated tensions of the cables, their large diameter and the significant friction of the pulleys on their axes.

La suppression de ces efforts a été obtenue en équipant les contrepoids de 2 galets qui roulent sur un chemin de roulement fixé à la table à dessin. The elimination of these efforts was obtained by equipping the counterweights with 2 rollers which roll on a raceway fixed to the drawing table.

Lorsque la table est horizontale, la masse des contrepoids n'a plus aucun effet sur la tension des câbles. When the table is horizontal, the mass of the counterweights no longer has any effect on the tension of the cables.

Lorsque la table est inclinée, les contrepoids ne peuvent plus transmettre aux câbles un effort supérieur à leur masse.  When the table is tilted, the counterweights can no longer transmit to the cables a force greater than their mass.

D'autre part, le travail du dessinateur a été facilité par le remplacement de l'équerre et de la règle graduée, par une équerre spéciale qui remplit les 2 fonctions. On the other hand, the work of the designer was facilitated by the replacement of the square and the graduated ruler, by a special square which fulfills the 2 functions.

Cette équerre est munie d'une poignée qui permet au dessinateur de manoeuvrer d'une seule main, la regle autoparallèle et l'équerre spéciale. This square has a handle which allows the designer to maneuver with one hand, the self-paralleling rule and the special square.

Différentes autres caractéristiques ressortent de la description cidessous faite en référence aux dessins annexés, qui montrent à titre d'exemples, des formes de réalisation de l'objet de l'invention. Various other characteristics will emerge from the description below made with reference to the appended drawings, which show by way of examples, embodiments of the subject of the invention.

La Fig. 1 est une vue partielle, en plan, représentant une extrémité de la règle autoparallèle. Fig. 1 is a partial plan view showing one end of the autoparallel rule.

La Fig. 2 est une coupe verticale suivant le plan A B de la Fig. 1. Fig. 2 is a vertical section along the plane A B of FIG. 1.

Ces 2 figures ne représentent que l'extrémité droite de la regle autoparallèle, l'extrêmite gauche est symétrique. These 2 figures represent only the right end of the self-parallel rule, the left end is symmetrical.

La Fig. 3 est une vue partielle, en plan, de l'équerre spéciale qui remplace l'équerre ordinaire et la règle graduée. Fig. 3 is a partial plan view of the special square which replaces the ordinary square and the graduated ruler.

La Fig. 4 est une coupe verticale suivant le plan C D de la Fig. 3. Fig. 4 is a vertical section along the plane C D of FIG. 3.

Les règles autoparalleles sont généralement composées d'une règle en Xplexiglass/91 et d'un profil de raidissement 2, fixé à cette règle.  Autoparalleles rules are generally composed of a rule in Xplexiglass / 91 and a stiffening profile 2, fixed to this rule.

Les perfectionnements,objet de la présente invention, sont décrits cidessous. The improvements which are the subject of the present invention are described below.

Sur le dessus du profil 2, une lame 3 légèrement flexible est fixée, par l'une de ses extrémités, au profil 2. On the top of profile 2, a slightly flexible blade 3 is fixed, at one of its ends, to profile 2.

Une cale d'épaisseur 4 positionne la lame à une certaine distance du profil 2;
Par son extrémité libre, la lame 3 est solidaire de la cornière 5, sur l'aile verticale de laquelle sont montées les 2 roulettes 6 et 7.
A shim of thickness 4 positions the blade at a certain distance from the profile 2;
By its free end, the blade 3 is integral with the angle iron 5, on the vertical wing of which are mounted the 2 rollers 6 and 7.

Une vis 8 et un écrou mollets 9, permettent de rapprocher la lame 3 du profil 2, ce qui a pour conséquence d'abaisser les roulettes 6 et 7 et d'dcar- ter, plus ou moins, la règle autoparallèle de la table à dessin. A screw 8 and a calf nut 9 allow the blade 3 to be brought closer to the profile 2, which has the consequence of lowering the rollers 6 and 7 and of removing, more or less, the self-parallel rule from the table to drawing.

D'autre part, le contrepoids d'équilibrage 10 est équipe de 2 roulettes
11 et 12, qui roulent sur le chemin de roulement 13,- qui est fixé par ses 2 extrémités à la table à dessin 14.
On the other hand, the balancing counterweight 10 is equipped with 2 casters
11 and 12, which run on the raceway 13, - which is fixed by its 2 ends to the drawing table 14.

L'équerre spéciale qui remplace les équerres ordinaires et les règles graduées est composee d'une règle horizontale 15, graduée à son bord supérieur, d'une règle verticale 16 ayant une graduation sur chacun de ses 2 bords, et une pièce métallique 17 qui maintient les 2 règles 15 et 16, dans des positions perpendiculaires.  The special square which replaces ordinary squares and graduated rulers is composed of a horizontal ruler 15, graduated at its upper edge, a vertical ruler 16 having a graduation on each of its 2 edges, and a metal piece 17 which maintains the 2 rules 15 and 16, in perpendicular positions.

Sur la pièce 17, une poignée est fixée, composée d'une piece en équerre 18 et de la pièce 19. On the piece 17, a handle is fixed, composed of a square piece 18 and the piece 19.

Le dessinateur, d'une seule main, peut, par l'intermédiaire de la pièce 19, faire glisser horizontalement, l'équerre spéciale, en la maintenal!t contre la regle autoparalléle.  The designer, with one hand, can, via part 19, slide the special square horizontally, keeping it against the self-paralleling rule.

De la même main, il lui est facile, par l'intermédiaire du profil de raidissement 2, de déplacer verticalement, l'ensemble de la règle parallèle et de l'équerre spéciale. With the same hand, it is easy for him, by means of the stiffening profile 2, to move vertically, the whole of the parallel rule and the special square.

La graduation droite de la règle verticale 16, a son zéro au même point que le zéro de la règle horizontale 15. The right graduation of the vertical ruler 16 has its zero at the same point as the zero of the horizontal ruler 15.

La graduation gauche de la regle 16 a son zéro dans le prolongement de la graduation de la règle 15. The left graduation of rule 16 has its zero in continuation of the graduation of rule 15.

Ces positions des zéros ont l'avantage de diminuer, autant que possible, les déplacements de l'équerre spéciale, au cours d'un dessin.  These positions of zeros have the advantage of reducing, as much as possible, the displacements of the special square, during a drawing.

Claims (4)

1 - Perfectionnement apporté aux règles autoparallèles pour 1 - Improvement brought to the autoparallel rules for diminuer les efforts nécessaires à leur déplacement, remplacer l'emploi de l'équerre et de la règle graduée par celui d'un seul appareil, caractérisé par l'adjonction de 2 roulettes (6) et (7) à chacune des extrémités de la règle.reduce the effort required to move them, replace the use of the square and the graduated rule with that of a single device, characterized by the addition of 2 rollers (6) and (7) at each end of the rule. 2 - Perfectionnement, selon la revendication 1, caractérisé par le fait que l'écartement entre la règle autoparallèle et la table à dessin est régalble par la manoeuvre de 2 boutons moletés (9)-.  2 - Improvement according to claim 1, characterized in that the spacing between the autoparallel ruler and the drawing table is adjustable by the operation of 2 knurled buttons (9) -. 3 - Perfectionnement, selon la revendication 1, caractérisé par une équerre composée de 2 règles graduées (15) et (16) et comportant une poignée (19) permettant au dessinateur de manoeuvrer facilement, simultanément et d'une seule main, la règle autoparal lèle et l'équerre.  3 - Improvement, according to claim 1, characterized by a square composed of 2 graduated rules (15) and (16) and having a handle (19) allowing the designer to easily maneuver, simultaneously and with one hand, the autoparal rule lele and square. 4 - Perfectionnement, selon la revendication 3, caractérisé par une équerre comportant 3 graduations 4 - Improvement according to claim 3, characterized by a square having 3 graduations - une graduation de la règle horizontale et une graduation de - a graduation of the horizontal ruler and a graduation of la regle verticale ayant leur zéro au même point. the vertical rule having their zero at the same point. rizontale.  rizontale. zéro dans le prolongement de la graduation de la règle ho zero in the extension of the scale of the ho rule - une deuxième graduation de la règle verticale ayant son - a second graduation of the vertical rule having its
FR8117286A 1981-09-10 1981-09-10 Travelling straight edge for drawing board - maintains alignment with resistance to movement reduced by mounting each end on two wheels Withdrawn FR2512398A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8117286A FR2512398A1 (en) 1981-09-10 1981-09-10 Travelling straight edge for drawing board - maintains alignment with resistance to movement reduced by mounting each end on two wheels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8117286A FR2512398A1 (en) 1981-09-10 1981-09-10 Travelling straight edge for drawing board - maintains alignment with resistance to movement reduced by mounting each end on two wheels

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR330316A (en) * 1903-03-20 1903-08-17 Fernand Decoeur Drawing machine
FR535387A (en) * 1921-05-12 1922-04-13 Naamlooze Vennootschap Werktui Draftsman's instrument
DE364795C (en) * 1922-12-02 Jakob Ender Liner
DE491666C (en) * 1928-02-24 1930-02-13 Otto Foersterling Drawing angle
GB852686A (en) * 1957-10-23 1960-10-26 Dargue Brothers Ltd Improvements in or relating to drawing boards having rack and pinion operated straight edges
US3180027A (en) * 1960-07-11 1965-04-27 Kermit K Ingle Drafting implement
FR2054803A5 (en) * 1969-07-28 1971-05-07 Kolbassieff Alexandre
FR2462276A1 (en) * 1979-07-31 1981-02-13 Rutten Jean Drafting machine with vertical bar to carry straight edges - has endless cable to ensure correct motion, connected to both ends of bar and passing over pulleys

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE364795C (en) * 1922-12-02 Jakob Ender Liner
FR330316A (en) * 1903-03-20 1903-08-17 Fernand Decoeur Drawing machine
FR535387A (en) * 1921-05-12 1922-04-13 Naamlooze Vennootschap Werktui Draftsman's instrument
DE491666C (en) * 1928-02-24 1930-02-13 Otto Foersterling Drawing angle
GB852686A (en) * 1957-10-23 1960-10-26 Dargue Brothers Ltd Improvements in or relating to drawing boards having rack and pinion operated straight edges
US3180027A (en) * 1960-07-11 1965-04-27 Kermit K Ingle Drafting implement
FR2054803A5 (en) * 1969-07-28 1971-05-07 Kolbassieff Alexandre
FR2462276A1 (en) * 1979-07-31 1981-02-13 Rutten Jean Drafting machine with vertical bar to carry straight edges - has endless cable to ensure correct motion, connected to both ends of bar and passing over pulleys

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