CH615992A5

CH615992A5 - Calliper rule

Info

Publication number: CH615992A5
Application number: CH1513477A
Authority: CH
Inventors: Philippe Kocher
Original assignee: Compac
Priority date: 1977-12-09
Filing date: 1977-12-09
Publication date: 1980-02-29

Abstract

The calliper rule comprises a rule (1) and a sliding cursor (3) whose movements are indicated by an index (9) set facing a dial (10) allowing readings in hundredths of millimetres. In order to avoid needing to read millimetre displacements on a graduation of the rule and the fractions of millimetre from the dial (10), the latter comprises a digital adder (11). Reading is thus faster and easier. <IMAGE>

Description

**ATTENTION** debut du champ DESC peut contenir fin de CLMS **. ** ATTENTION ** start of the DESC field may contain end of CLMS **.

REVENDICATIONS 1. Pied à coulisse comprenant une règle et un curseur coulissant sur cette règle, les déplacements de ce curseur le long de la règle étant indiqués par un index et un cadran, le déplacement relatif entre l'index et le cadran étant obtenu par l'intermédiaire d'au moins un pignon denté en prise avec une crémaillère portée par la règle, ce cadran et l'index effectuant une rotation complète pour une unité de longueur déterminée, le curseur comprenant en outre un dispositif totalisateur digital du nombre d'unités, caractérisé en ce que le dispositif totalisateur digital comprend au moins un disque rotatif dont le plan est parallèle à celui du cadran, ce disque portant des chiffres destinés à apparaître successivement dans une fenêtre du cadran. CLAIMS 1. Caliper comprising a ruler and a sliding cursor on this ruler, the displacements of this cursor along the ruler being indicated by an index and a dial, the relative displacement between the index and the dial being obtained by the intermediate of at least one toothed pinion engaged with a rack carried by the rule, this dial and the index performing a complete rotation for a unit of determined length, the cursor further comprising a digital totalizer of the number of units, characterized in that the digital totalizing device comprises at least one rotating disc whose plane is parallel to that of the dial, this disc bearing numbers intended to appear successively in a window of the dial.

2. Pied à coulisse selon la revendication 1, caractérisé en ce qu'il comprend deux disques rotatifs portant des chiffres destinés à apparaître dans une seule fenêtre du cadran, le premier disque étant entraîné à partir dudit pignon denté, le second disque étant entraîné a partir du premier disque. 2. Caliper according to claim 1, characterized in that it comprises two rotary discs bearing numbers intended to appear in a single window of the dial, the first disc being driven from said toothed pinion, the second disc being driven a from the first disc.

3. Pied à coulisse selon la revendication 2, caractérisé en ce qu'il comprend un mécanisme d'entraînement intermittent du second disque, ce mécanisme étant actionné par le premier disque. 3. Vernier caliper according to claim 2, characterized in that it comprises an intermittent drive mechanism of the second disc, this mechanism being actuated by the first disc.

4. Pied à coulisse selon la revendication 3, caractérisé en ce que les deux disques sont concentriques. 4. Vernier caliper according to claim 3, characterized in that the two discs are concentric.

L'invention a pour objet un pied à coulisse comprenant une règle et un curseur coulissant sur cette règle, les déplacements de ce curseur le long de la règle étant indiqués par un index et un cadran, le déplacement relatif entre l'index et le cadran étant obtenu par l'intermédiaire d'au moins un pignon denté en prise avec une crémaillère portée par la règle, ce cadran et l'index effectuant une rotation complète pour une unité de longueur déterminée, le curseur comprenant en outre un dispositif totalisateur digital du nombre d'unités. The subject of the invention is a caliper comprising a ruler and a sliding cursor on this ruler, the displacements of this cursor along the ruler being indicated by an index and a dial, the relative displacement between the index and the dial being obtained by means of at least one toothed pinion engaged with a rack carried by the ruler, this dial and the index performing a complete rotation for a unit of determined length, the cursor further comprising a digital totalizing device of the number of units.

Dans les pieds à coulisse connus de ce genre, le totalisateur est constitué par des tambours portant des chiffres sur leur périphérie. Des totalisateurs de ce genre sont relativement volumineux et il en résulte que le curseur présente une épaisseur gênante et inesthétique. In known calipers of this kind, the totalizer is constituted by drums bearing numbers on their periphery. Totalizers of this kind are relatively bulky and the result is that the cursor has a troublesome and unsightly thickness.

L'invention a pour but de fournir un pied à coulisse du genre précité dont le curseur peut présenter une forme très plate. The object of the invention is to provide a caliper of the aforementioned type, the cursor of which can have a very flat shape.

A cet effet, le pied à coulisse selon l'invention est caractérisé en ce que le dispositif totalisateur digital comprend au moins un disque rotatif dont le plan est parallèle à celui du cadran, ce disque portant des chiffres destinés à appareître successivement dans une fenêtre du cadran. To this end, the caliper according to the invention is characterized in that the digital totalizing device comprises at least one rotating disc whose plane is parallel to that of the dial, this disc bearing numbers intended to appear successively in a window of the dial.

Le dessin annexé représente, schématiquement et à titre d'exemple, une forme d'exécution du pied à coulisse objet de l'invention. The attached drawing shows, schematically and by way of example, an embodiment of the caliper object of the invention.

La fig. 1 est une vue en plan de ce pied à coulisse. Fig. 1 is a plan view of this calliper.

La fig. 2 montre à plus grande échelle l'indicateur de ce pied à coulisse, le cadran étant enlevé. Fig. 2 shows on a larger scale the indicator of this caliper, the dial being removed.

La fig. 3 est une coupe partielle selon la ligne III-III de la fig. 2. Fig. 3 is a partial section along line III-III of FIG. 2.

La fig. 4 est une coupe partielle selon la ligne IV-IV de la fig.2. Fig. 4 is a partial section along the line IV-IV of FIG. 2.

La fig. 5 illustre l'entraînement d'un mobile. Fig. 5 illustrates the driving of a mobile.

En référence a la fig. 1, le pied à coulisse comprend une règle 1 munie d'un bec 2 et sur laquelle peut se déplacer un curseur 3 venu d'une pièce avec un bec mobile 4. La règle 1 présente une rainure longitudinale S dont l'un des bords latéraux est muni d'une crémaillère 6. Cette crémaillère est en prise avec deux pignons 7, 8 visibles à la fig. 3 et destinés à entraîner un index rotatif 9 en regard d'un cadran 10 porté par le curseur 3. Les rapports de transmission sont choisis pour que l'index 9 effectue un tour complet par millimètre de déplacement relatif entre le curseur 3 et la règle 1. With reference to fig. 1, the caliper comprises a rule 1 provided with a spout 2 and on which a cursor 3 can move, which comes in one piece with a movable spout 4. The rule 1 has a longitudinal groove S, one of the edges of which side is provided with a rack 6. This rack is engaged with two pinions 7, 8 visible in FIG. 3 and intended to drive a rotary index 9 opposite a dial 10 carried by the cursor 3. The transmission ratios are chosen so that the index 9 performs one complete revolution per millimeter of relative movement between the cursor 3 and the ruler 1.

Le cadran 10 présente une fenêtre il dans laquelle apparaissent des chiffres portés par un dispositif totalisateur. The dial 10 presents a window il in which appear numbers carried by a totalizing device.

Comme le montrent les fig. 2 et 3, le curseur 3 porte un dispositif totalisateur logé dans un boîtier 12 dont le fond 13 et le couvercle 14 constituent deux platines entre lesquelles sont montés des mobiles dentés. As shown in fig. 2 and 3, the cursor 3 carries a totalizing device housed in a housing 12, the bottom 13 and the cover 14 constitute two plates between which are mounted toothed mobiles.

Le pignon 7 est solidaire d'un disque 15 relié par un ressort 16 à une roue dentée 17. Cette dernière engrène avec un pignon 18 fixé sur un pivot 19 portant l'aiguille qui constitue l'index 9. The pinion 7 is integral with a disc 15 connected by a spring 16 to a toothed wheel 17. The latter meshes with a pinion 18 fixed on a pivot 19 carrying the needle which constitutes the index 9.

De même, le pignon 8 est angulairement solidaire d'un disque 20 qui entraîne lui-même, par l'intermédiaire d'un dispositif 21 une roue dentée 22 également en prise avec le pignon 18. Le dispositif 21 est un dispositif anti-chocs qui peut être réalisé de différentes façons connues en elles-mêmes et n'est donc pas décrit en détail. Similarly, the pinion 8 is angularly integral with a disc 20 which itself drives, by means of a device 21 a toothed wheel 22 also in engagement with the pinion 18. The device 21 is an anti-shock device which can be produced in different ways known in themselves and is therefore not described in detail.

Le ressort 16 est un ressort à boudin ne comprenant que quelques spires et qui est précontraint pour exercer un couple élastique sensiblement entre le disque 15 et la roue dentée 17. The spring 16 is a coil spring comprising only a few turns and which is prestressed to exert an elastic torque substantially between the disc 15 and the toothed wheel 17.

Par cette disposition, ce ressort 16 a tendance à faire tourner les pignons 7 et 8 en sens inverse l'un de l'autre, de sorte qu'ils prennent appui contre des flancs opposés de la crémaillère 6. Il en résulte la suppression des jeux qui proviennent de l'ébat existant normalement entre les dentures d'un pignon et la crémaillère. By this arrangement, this spring 16 tends to rotate the pinions 7 and 8 in opposite directions to one another, so that they bear against opposite sides of the rack 6. This results in the elimination of clearances which originate from the play normally existing between the teeth of a pinion and the rack.

La roue dentée 22 est solidaire en rotation d'un disque à chiffres 23 monté sur le même pivot 33. Le rapport entre le pignon 18 et la rue dentée 22 est choisi de façon que le pignon 18 fasse dix tours pour un tour de la roue dentée 22. Ainsi, cette dernière effectue une rotation complète pour chaque centimètre de déplacement du curseur 3. The toothed wheel 22 is integral in rotation with a number disc 23 mounted on the same pivot 33. The ratio between the pinion 18 and the toothed track 22 is chosen so that the pinion 18 makes ten turns for one revolution of the wheel toothed 22. Thus, the latter performs a complete rotation for each centimeter of movement of the cursor 3.

Les fig. 4 et 5 montrent le dispositif d'accouplement intermittent entre le disque 23 qui porte la graduation des millimètres et un disque 24 portant une graduation en centimètres. Ce dispositif d'accouplement intermittent est connu en soi. Il comprend un mobile rotatif 25 constitué par une roue dentée 26 à douze dents solidaire en rotation d'un disque 27 présentant douze facettes arquées suivant un rayon correspondant au rayon extérieur du disque 24. Ce dernier est accouplé à une roue 28 présentant une seule dent 29 disposée de façon à coopérer avec la roue 26. En regard de cette dent 29, la périphérie du disque 24 présente une échancrure 30. Figs. 4 and 5 show the intermittent coupling device between the disc 23 which carries the graduation of millimeters and a disc 24 carrying a graduation in centimeters. This intermittent coupling device is known per se. It comprises a rotary mobile 25 constituted by a toothed wheel 26 with twelve teeth integral in rotation with a disc 27 having twelve facets arched along a radius corresponding to the outside radius of the disc 24. The latter is coupled to a wheel 28 having a single tooth 29 disposed so as to cooperate with the wheel 26. Opposite this tooth 29, the periphery of the disc 24 has a notch 30.

Lors de la rotation des disques 24 et 28, la dent 29 vient s'engager dans la roue dentée 26 et en même temps l'échancrure 30 vient en regard du disque 27. La roue 28 entraîne alors la roue 26 d'un angle correspondant au pas de sa denture. Lorsque la dent 29 a quitté la roue dentée 26, le bord du disque 24 coopère avec une facette du disque et empêche ce dernier de tourner jusqu'à ce que les disques 24 et 28 aient effectué une rotation complète et que la dent 29 s'engage à nouveau dans la roue dentée 26. During the rotation of the discs 24 and 28, the tooth 29 engages in the toothed wheel 26 and at the same time the notch 30 comes opposite the disc 27. The wheel 28 then drives the wheel 26 by a corresponding angle at the pace of his teeth. When the tooth 29 has left the toothed wheel 26, the edge of the disc 24 cooperates with a facet of the disc and prevents the latter from turning until the discs 24 and 28 have made a complete rotation and the tooth 29 s' engages the gear 26 again.

Le disque 27 et la roue dentée 26 sont solidaires en rotation d'une roue dentée 31 engrenant avec la denture périphérique 32 du disque 24. The disc 27 and the toothed wheel 26 are integral in rotation with a toothed wheel 31 meshing with the peripheral toothing 32 of the disc 24.

Ainsi, chaque fois le disque 23 effectue un tour complet indiquant un déplacement du curseur de dix millimètres, le disque 24 effectue un douzième de tour et affiche 1 cm d'avance du curseur. Thus, each time the disc 23 makes a complete revolution indicating a displacement of the cursor by ten millimeters, the disk 24 performs a twelfth of a revolution and displays 1 cm in advance of the cursor.

Bien entendu, on peut prévoir de nombreuses modifications Of course, many modifications can be expected

au dispositif décrit et en particulier, les disques 24 et 28, au lieu d'être concentriques, pourraient être disposés côte à côte. Pour faciliter la lecture, le disque 23 pourrait être complété par des divisions indiquant, par exemple, les dixièmes de millimètre. to the device described and in particular, the discs 24 and 28, instead of being concentric, could be arranged side by side. To facilitate reading, the disc 23 could be supplemented by divisions indicating, for example, tenths of a millimeter.

On pourrait aussi prévoir un mécanisme d'accouplement intermittent entre la roue dentée 22 et le disque 23, de façon que les chiffres portés par ce dernier défilent par saccades devant la fenêtre 11. One could also provide an intermittent coupling mechanism between the toothed wheel 22 and the disc 23, so that the numbers carried by the latter jerk past the window 11.

Claims

1. Caliper comprising a ruler and a sliding cursor on this ruler, the displacements of this cursor along the ruler being indicated by an index and a dial, the relative displacement between the index and the dial being obtained by the intermediate of at least one toothed pinion engaged with a rack carried by the rule, this dial and the index performing a complete rotation for a unit of determined length, the cursor further comprising a digital totalizer of the number of units, characterized in that the digital totalizing device comprises at least one rotating disc whose plane is parallel to that of the dial, this disc bearing numbers intended to appear successively in a window of the dial.

2. Caliper according to claim 1, characterized in that it comprises two rotary discs bearing numbers intended to appear in a single window of the dial, the first disc being driven from said toothed pinion, the second disc being driven a from the first disc.

3. Vernier caliper according to claim 2, characterized in that it comprises an intermittent drive mechanism of the second disc, this mechanism being actuated by the first disc.

4. Vernier caliper according to claim 3, characterized in that the two discs are concentric.

The subject of the invention is a caliper comprising a ruler and a sliding cursor on this ruler, the displacements of this cursor along the ruler being indicated by an index and a dial, the relative displacement between the index and the dial being obtained by means of at least one toothed pinion engaged with a rack carried by the ruler, this dial and the index performing a complete rotation for a unit of determined length, the cursor further comprising a digital totalizing device of the number of units.

In known calipers of this kind, the totalizer is constituted by drums bearing numbers on their periphery. Totalizers of this kind are relatively bulky and the result is that the cursor has a troublesome and unsightly thickness.

The object of the invention is to provide a caliper of the aforementioned type, the cursor of which can have a very flat shape.

To this end, the caliper according to the invention is characterized in that the digital totalizing device comprises at least one rotating disc whose plane is parallel to that of the dial, this disc bearing numbers intended to appear successively in a window of the dial.

The attached drawing shows, schematically and by way of example, an embodiment of the caliper object of the invention.

Fig. 1 is a plan view of this calliper.

Fig. 2 shows on a larger scale the indicator of this caliper, the dial being removed.

Fig. 3 is a partial section along line III-III of FIG. 2.

Fig. 4 is a partial section along the line IV-IV of FIG. 2.

Fig. 5 illustrates the driving of a mobile.

With reference to fig. 1, the caliper comprises a rule 1 provided with a spout 2 and on which a cursor 3 can move, which comes in one piece with a movable spout 4. The rule 1 has a longitudinal groove S, one of the edges of which side is provided with a rack 6. This rack is engaged with two pinions 7, 8 visible in FIG. 3 and intended to drive a rotary index 9 opposite a dial 10 carried by the cursor 3. The transmission ratios are chosen so that the index 9 performs one complete revolution per millimeter of relative movement between the cursor 3 and the ruler 1.

The dial 10 presents a window il in which appear numbers carried by a totalizing device.

As shown in fig. 2 and 3, the cursor 3 carries a totalizing device housed in a housing 12, the bottom 13 and the cover 14 constitute two plates between which are mounted toothed mobiles.

The pinion 7 is integral with a disc 15 connected by a spring 16 to a toothed wheel 17. The latter meshes with a pinion 18 fixed on a pivot 19 carrying the needle which constitutes the index 9.

Similarly, the pinion 8 is angularly integral with a disc 20 which itself drives, by means of a device 21 a toothed wheel 22 also in engagement with the pinion 18. The device 21 is an anti-shock device which can be produced in different ways known in themselves and is therefore not described in detail.

The spring 16 is a coil spring comprising only a few turns and which is prestressed to exert an elastic torque substantially between the disc 15 and the toothed wheel 17.

By this arrangement, this spring 16 tends to rotate the pinions 7 and 8 in opposite directions to one another, so that they bear against opposite sides of the rack 6. This results in the elimination of clearances which originate from the play normally existing between the teeth of a pinion and the rack.

The toothed wheel 22 is integral in rotation with a number disc 23 mounted on the same pivot 33. The ratio between the pinion 18 and the toothed track 22 is chosen so that the pinion 18 makes ten turns for one revolution of the wheel toothed 22. Thus, the latter performs a complete rotation for each centimeter of movement of the cursor 3.

Figs. 4 and 5 show the intermittent coupling device between the disc 23 which carries the graduation of millimeters and a disc 24 carrying a graduation in centimeters. This intermittent coupling device is known per se. It comprises a rotary mobile 25 constituted by a toothed wheel 26 with twelve teeth integral in rotation with a disc 27 having twelve facets arched along a radius corresponding to the outside radius of the disc 24. The latter is coupled to a wheel 28 having a single tooth 29 disposed so as to cooperate with the wheel 26. Opposite this tooth 29, the periphery of the disc 24 has a notch 30.

During the rotation of the discs 24 and 28, the tooth 29 engages in the toothed wheel 26 and at the same time the notch 30 comes opposite the disc 27. The wheel 28 then drives the wheel 26 by a corresponding angle at the pace of his teeth. When the tooth 29 has left the toothed wheel 26, the edge of the disc 24 cooperates with a facet of the disc and prevents the latter from turning until the discs 24 and 28 have made a complete rotation and the tooth 29 s' engages the gear 26 again.

The disc 27 and the toothed wheel 26 are integral in rotation with a toothed wheel 31 meshing with the peripheral toothing 32 of the disc 24.

Thus, each time the disc 23 makes a complete revolution indicating a displacement of the cursor by ten millimeters, the disk 24 performs a twelfth of a revolution and displays 1 cm in advance of the cursor.

** ATTENTION ** end of the CLMS field may contain start of DESC **.