FR2587105A1 - Device for measuring the distance between two objects - Google Patents

Device for measuring the distance between two objects Download PDF

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Publication number
FR2587105A1
FR2587105A1 FR8513714A FR8513714A FR2587105A1 FR 2587105 A1 FR2587105 A1 FR 2587105A1 FR 8513714 A FR8513714 A FR 8513714A FR 8513714 A FR8513714 A FR 8513714A FR 2587105 A1 FR2587105 A1 FR 2587105A1
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FR
France
Prior art keywords
housing
opening
graduated
distance
ribbon
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Withdrawn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
FR8513714A
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French (fr)
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.)
MERMET GRANDFILLE AUGUSTE
Original Assignee
MERMET GRANDFILLE AUGUSTE
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 MERMET GRANDFILLE AUGUSTE filed Critical MERMET GRANDFILLE AUGUSTE
Priority to FR8513714A priority Critical patent/FR2587105A1/en
Publication of FR2587105A1 publication Critical patent/FR2587105A1/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B67/00—Sporting games or accessories therefor, not provided for in groups A63B1/00 - A63B65/00
    • A63B67/06—Ring or disc tossing games, e.g. quoits; Throwing or tossing games, e.g. using balls; Games for manually rolling balls, e.g. marbles
    • A63B67/066—Ring or disc tossing games, e.g. quoits; Throwing or tossing games, e.g. using balls; Games for manually rolling balls, e.g. marbles using balls on a horizontal playing ground, e.g. petanque
    • A63B67/068—Devices used therewith for measuring distance or difference in distance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/10—Measuring tapes
    • G01B3/1061—Means for displaying or assisting reading of length measurement
    • G01B3/1069—Electronic or mechanical display arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/10—Measuring tapes
    • G01B3/1084—Tapes combined with arrangements for functions other than measuring lengths
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/10—Measuring tapes
    • G01B3/1084—Tapes combined with arrangements for functions other than measuring lengths
    • G01B3/1092—Tapes combined with arrangements for functions other than measuring lengths for performing length measurements and at least one other measurement of a different nature, e.g. bubble-type level
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/10—Measuring tapes
    • G01B3/1084—Tapes combined with arrangements for functions other than measuring lengths
    • G01B3/1094—Tapes combined with arrangements for functions other than measuring lengths for recording information or for performing calculations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/10—Measuring tapes
    • G01B3/1041—Measuring tapes characterised by casings
    • G01B2003/1053—Tape exit slots, e.g. shape or exit direction
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/10—Measuring tapes
    • G01B3/1056—Tape end arrangements, e.g. end-hooks

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

Device 1 for measuring the distance between two objects 2, 3, of the type consisting of: - a box 4 including an opening 5, - a graduated tape 10 whose end 8 is fixed in the box 4 and whose other free end 11 passes through the said opening 5, - a spring 9 intended to wind up the said tape 10 in the said box 4 and allow this graduated tape 10 to be unwound in order to measure the distance between the two objects 2, 3. Characterised: - in that the free end 11 of the graduated tape 10 includes a proximity switch 16 associated with a first contact indicator 18, - in that the face 6 of the box 4 including the opening 5 and/or the face 12 of this box 4 parallel and opposite the one 6 including the opening 5 also has a proximity switch 13, 14 associated with a second contact indicator 15.

Description

DISPOSITIF POUR MESURER LA DISTANCE ENTRE DEUX OBJETS.DEVICE FOR MEASURING THE DISTANCE BETWEEN TWO OBJECTS.

L'invention concerne un dispositif pour mesurer la distance entre deux objets, tels que par exemple entre deux boules. The invention relates to a device for measuring the distance between two objects, such as for example between two balls.

On connait déjà un dispositif du type en question constitué par un boitier renfermant un ruban gradué dont une extrémité est fixée et enroulée dans le boitier et dont l'autre extrémité libre qui traverse le boitier par une ouverture permet, sous l'effet d'un ressort, d'être déroulée pour mesurer la distance entre deux objets à mesurer. Bien que très largement répandu, notamment auprès des bricoleurs, ce dispositif présente toutefois l'inconvéniant de manquer de précision et surtout de nécessiter un contact physique entre d'une part, le boitier, et d'autre part, l'extrémité du ruban et les objets dont on veut mesurer la distance, ce qui peut involontairement entrainer le déplacement de cet objet et par voie de conséquence, occasionner des contestations. There is already known a device of the type in question consisting of a case containing a graduated ribbon, one end of which is fixed and wound in the case and the other free end of which passes through the case through an opening allows, under the effect of a spring, to be unrolled to measure the distance between two objects to be measured. Although very widely used, in particular among DIY enthusiasts, this device has the disadvantage of lacking precision and above all of requiring physical contact between on the one hand, the case, and on the other hand, the end of the ribbon and objects whose distance you want to measure, which can unintentionally cause this object to move and, consequently, cause disputes.

L'invention pallie ces inconvénients. Elle concerne un dispositif pour mesurer la distance entre deux objets, qui soit facile à construire et à manipuler, fiable, et évite les désagréments des dispositifs connus à ce jour. The invention overcomes these drawbacks. It relates to a device for measuring the distance between two objects, which is easy to construct and to handle, reliable, and avoids the inconvenience of the devices known to date.

Ce dispositif du type constitué par
- un boitier comportant une ouverture,
- un ruban gradué dont une extrémité est fixée dans ledit boitier et dont l'autre extrémité libre traverse ce boitier par ladite ouverture,
- un ressort destiné à enrouler ledit ruban dans ledit boitier et à permettre de dérouler ce ruban gradué pour mesurer la distance entre deux objets, se caractérise
- en ce que l'extrémité libre du ruban gradué présente un contacteur de présence associé à un premier témoin de contact
- en ce que la face du boitier comportant l'ouverture et/ou la face de ce boitier parallèle et opposée à celle comportant l'ouverture présente également un contacteur de présence associé à un second témoin de contact.This device of the type constituted by
- a case comprising an opening,
- a graduated ribbon, one end of which is fixed in said housing and the other free end of which passes through this housing through said opening,
- a spring for winding said ribbon in said housing and allowing this graduated ribbon to be unwound to measure the distance between two objects, is characterized
- in that the free end of the graduated ribbon has a presence switch associated with a first contact indicator
- in that the face of the housing comprising the opening and / or the face of this housing parallel and opposite to that comprising the opening also has a presence switch associated with a second contact indicator.

En d'autres termes, l'invention consiste à ménager sur les faces des boitiers à l'extrémité des rubans des contacteurs de présence qui, associés à des témoins de contact, permettent ainsi de détecter que l'on est au voisinage immédiat des objets dont on veut mesurer la distance qui est ainsi lue sur le ruban gradué. In other words, the invention consists in providing, on the faces of the boxes at the end of the strips, presence switches which, associated with contact indicators, thus make it possible to detect that one is in the immediate vicinity of the objects. whose distance we want to measure, which is thus read on the graduated tape.

Comme on le sait, un contacteur de présence est un organe destiné à déceler la présence d'un objet avec ou sans contact avec cet objet. As is known, a presence switch is a device intended to detect the presence of an object with or without contact with this object.

En pratique
- le témoin de contact est une lampe reliée au contacteur de présence par un circuit électrique
- ce circuit électrique reliant le premier témoin de contact au contacteur de présence disposé à l'extrémité libre du ruban est un fil conducteur noyé dans ledit ruban gradué
- le circuit électrique reliant ce premier témoin de contact au contacteur de présence disposé à l'extrémité libre du ruban gradué est constitué par le ruban lui-même réalisé en une matière conductrice
- les contacteurs de présence sont du type capacitif ::
- le dispositif comporte également un organe de blocage mécanique du déroulement du ruban gradué
- le dispositif comporte également un ensemble électronique destiné à mesurer et à mémoriser les distances entre les deux capteurs de présence
- enfin, cet ensemble électronique est associé à un afficheur placé sur le boitier, destiné ainsi à faire apparaitre la distance mesurée et/ou les distances mémorisées.In practice
- the contact indicator is a lamp connected to the presence switch by an electrical circuit
- This electrical circuit connecting the first contact indicator to the presence switch located at the free end of the ribbon is a conductive wire embedded in said graduated ribbon
- the electrical circuit connecting this first contact indicator to the presence contactor arranged at the free end of the graduated tape consists of the tape itself made of a conductive material
- the presence contactors are of the capacitive type:
- The device also includes a mechanical blocking member for the unwinding of the graduated tape
- the device also includes an electronic assembly intended to measure and memorize the distances between the two presence sensors
- Finally, this electronic assembly is associated with a display placed on the housing, thus intended to display the measured distance and / or the stored distances.

La manière dont l'invention peut être réalisée et les avantages qui en découlent ressortiront mieux de l'exemple de réalisation qui suit, donné à titre indicatif et non limitatif à l'appui de la figure unique annexée, étant entendu que l'application illustrée aux jeux de boules n'est nullement limitative mais simplement indicative. The manner in which the invention can be implemented and the advantages which result therefrom will emerge more clearly from the example of embodiment which follows, given by way of nonlimiting indication in support of the single appended figure, it being understood that the application illustrated bowling is by no means limiting but merely indicative.

Le dispositif selon l'invention désigné par la référence générale (1) sert à mesurer dans le cas d'espèce la distance entre une boule (2) et le cochonnet (3). Le dispositif (1) se compose d'un boitier (4) en métal ou en matière plastique appropriée présentant une ouverture (5) disposée sur une de ses faces latérales (6). En cours de fonctionnement, ce boitier repose sur le sol (7) et est disposé entre la boule (2) et le cochonnet (3). De manière connue, l'intérieur du boitier (4) comporte, enroulé sur l'axe (8) auquel est associé un ressort de rappel (9), un ruban gradué (10) dont l'extrémité labre (11) sort à travers l'ouverture (5). Sous l'effet du ressort (9), le ruban gradué (10) est enroulé sur l'axe de bobinage (8). The device according to the invention designated by the general reference (1) is used in the present case to measure the distance between a ball (2) and the jack (3). The device (1) consists of a box (4) made of metal or a suitable plastic material having an opening (5) arranged on one of its lateral faces (6). During operation, this box rests on the ground (7) and is arranged between the ball (2) and the jack (3). In known manner, the interior of the housing (4) comprises, wound on the axis (8) with which is associated a return spring (9), a graduated ribbon (10) whose labr end (11) comes out through the opening (5). Under the effect of the spring (9), the graduated ribbon (10) is wound on the winding axis (8).

Selon l'invention, la face latérale (6) comportant l'ouverture (5) ainsi que la face parallèle opposée (12) présentent chacune un capteur de présence capacitif respectivement (13) et (14), disposé à hauteur appropriée. Par un circuit électrique ou analogue non repré- senté, chacun de ces capteurs (13,14) est associé à un témoin de contact (15), par exemple une lampe, voire un signal sonore. According to the invention, the lateral face (6) comprising the opening (5) as well as the opposite parallel face (12) each have a capacitive presence sensor respectively (13) and (14), arranged at an appropriate height. By an electrical circuit or the like not shown, each of these sensors (13, 14) is associated with a contact indicator (15), for example a lamp, or even an audible signal.

Selon l'autre caractéristique de l'invention, l'extrémité libre (11) du ruban gradué (10) comporte également un autre contacteur de présence (16). Le ruban gradué (10) est réalisé en un matériau souple mais rigide et comporte noyé dans la masse un fil conducteur (17) pour amener le courant à l'axe (8) puis de là par un circuit électrique non représenté à un autre témoin de contact (18) constitué également par une lampe ou un signal sonore et placé sur le dessus du boitier. According to another characteristic of the invention, the free end (11) of the graduated strip (10) also includes another presence switch (16). The graduated tape (10) is made of a flexible but rigid material and has embedded in the mass a conductive wire (17) to bring the current to the axis (8) then from there by an electrical circuit not shown to another witness contact (18) also consisting of a lamp or an audible signal and placed on top of the housing.

Une pile électrique (19), voire un capteur solaire assure l'alimentation électrique d l'ensemble. Un organe de blocage mécanique non représenter peut assurer de manière connue le blocage du ruban déroulé (10). An electric battery (19), or even a solar collector ensures the electrical supply of the assembly. A mechanical blocking member that is not shown can block the unwound tape (10) in known manner.

Un ensemble électronique (20) alimenté par la pile (19) décompte les barres de graduation du ruban (10) qui défilent devant lui au niveau de l'ouverture (5). Cetensemble électronique (20) est asservi à un circuit intégré de comptage ou de de'comptage qui alimente un organe de visualisation (21) tel qu'un afficheur à cristaux liquides, de manière à afficher sur le dessus du boitier (4) la distance entre les deux boules (2) et (3) lorsque les contacteurs respectivement (14) et (16) sont au voisinage immédiat de ces deux objets et qu'ainsi les lampes témoin (15) et (18) sont allumées. Dans une variante avantageuse, l'ensemble électronique (20) comporte également unellémorisation qui permet ainsi de stocker différentes distances et d'afficher celles-ci sur l'organe (21) et ainsi de pouvoir classer les différentes distances mesurées. An electronic assembly (20) powered by the battery (19) counts the graduation bars of the ribbon (10) which pass in front of it at the level of the opening (5). This electronic assembly (20) is slaved to an integrated counting or down counting circuit which supplies a display member (21) such as a liquid crystal display, so as to display the distance on the top of the box (4). between the two balls (2) and (3) when the contactors respectively (14) and (16) are in the immediate vicinity of these two objects and that the indicator lights (15) and (18) are thus on. In an advantageous variant, the electronic assembly (20) also includes a memory which thus makes it possible to store different distances and to display these on the member (21) and thus to be able to classify the different measured distances.

Grâce à un dispositif classique de remise à zéro, ces distances peuvent être ainsi comparees ou rappelées. Thanks to a classic reset device, these distances can be compared or recalled.

I1 importe que la sensibilité des capteurs de présence (13,14,16) soit sensiblement identique de manière à ne pas fausser les mesures, puisque l'on cherche à éviter le contact physique avec les objets. It is important that the sensitivity of the presence sensors (13,14,16) be substantially identical so as not to distort the measurements, since it is sought to avoid physical contact with the objects.

Le capteur (13) disposé sur la face (6) du boitier (4) permet de mesurer des distances entre des objets dont la distance est inférieure à la largeur du boitier entre les deux faces paralleles (6) et (12).  The sensor (13) disposed on the face (6) of the housing (4) makes it possible to measure distances between objects the distance of which is less than the width of the housing between the two parallel faces (6) and (12).

Bien que l'invention ait été décrite dans son application aux jeux de boules, elle peut trouver sans autre modification d'autres applications telles que par exemple pour mesurer des distances dans l'industrie, dans le bâtiment, dans le bricolage ou chez les artisans.  Although the invention has been described in its application to boules games, it can find without other modifications other applications such as for example for measuring distances in industry, in construction, in DIY or in craftsmen .

Claims (8)

REVENDICATIONS 1/ Dispositif (1) pour mesurer la distance entre deux objets (2,3), du type constitué par 1 / Device (1) for measuring the distance between two objects (2,3), of the type constituted by - un boitier (4) comportant une ouverture (5), - a housing (4) comprising an opening (5), - un ruban gradué (10) dont une extrémité (8) est fixée dans le boitier (4) et l'autre extrémité libre (11) traverse ladite ouverture (5), - a graduated ribbon (10), one end (8) of which is fixed in the housing (4) and the other free end (11) passing through said opening (5), - un ressort (9) destiné à enrouler ledit ruban (10) dans ledit boitier (4) et à permettre dewdérouler ce ruban gradué (10) pour mesurer la distance entre les deux objets (2,3), caractérisé - a spring (9) intended to wind said ribbon (10) in said housing (4) and to allow this graduated ribbon (10) to be unwound to measure the distance between the two objects (2,3), characterized - en ce que l'extrémité libre (11) du ruban gradué (10) comporte un contacteur de présence (16) associé à un premier témoin de contact (18) - in that the free end (11) of the graduated strip (10) comprises a presence switch (16) associated with a first contact indicator (18) - en ce que la face (6) du boitier (4) comportant l'ouverture (5) et/ou la face (12) de ce boitier (4) parallèle et opposée à celle (6) comportant l'ouverture (5), présente également un contact de présence (13,14) associé à un second témoin de contact (15). - in that the face (6) of the housing (4) comprising the opening (5) and / or the face (12) of this housing (4) parallel and opposite to that (6) comprising the opening (5) , also has a presence contact (13,14) associated with a second contact indicator (15). 2/ Dispositif selon la revendication 1, caractérisé en ce que le témoin de contact (15,18) est une lampe reliée au contacteur de présence (13,14,16) par un circuit électrique. 2 / Device according to claim 1, characterized in that the contact indicator (15,18) is a lamp connected to the presence switch (13,14,16) by an electrical circuit. 3/ Dispositif selon la revendication 2, caractérisé en ce que le circuit électrique reliant le premier témoin de contact (18) au contacteur de présence (16) disposé à l'extrémité libre (11) du ruban gradué (10) est un fil conducteur (17) noyé dans ce ruban (10). 3 / Device according to claim 2, characterized in that the electrical circuit connecting the first contact indicator (18) to the presence switch (16) disposed at the free end (11) of the graduated tape (10) is a conductive wire (17) embedded in this ribbon (10). 4/ Dispositif selon la revendication 2, caractérisé en ce que le circuit électrique reliant le premier témoin de contact (18) au contacteur de présence (7) disposé à l'extrémité libre (11) du ruban gradué (10) est constitué par le ruban lui-même (10) rendu conducteur.  4 / Device according to claim 2, characterized in that the electrical circuit connecting the first contact indicator (18) to the presence switch (7) disposed at the free end (11) of the graduated strip (10) is constituted by the ribbon itself (10) made conductive. 5/ Dispositif selon la revendication 1, caractérisé en ce que les contacteurs de présence (13,14,16) sont du type capacitif. 5 / Device according to claim 1, characterized in that the presence contactors (13,14,16) are of the capacitive type. 6/ Dispositif selon la revendication 1, caractérisé en ce qu'il comporte également un organe de blocage mé- canique du déroulement du ruban (10).  6 / Device according to claim 1, characterized in that it also comprises a mechanical blocking member of the unwinding of the tape (10). 7/ Dispositif selon la revendication 1, caractérisé en ce qu'il comporte également un ensemble électronique (20) destiné à mesurer et à mémoriser la distance entre les deux capteurs de présence (13) ou (14) et (16). 7 / Device according to claim 1, characterized in that it also comprises an electronic assembly (20) intended to measure and memorize the distance between the two presence sensors (13) or (14) and (16). 8/ Dispositif selon la revendication 7, caractérisé en ce que l'ensemble électronique (20) est associé à un afficheur (21) placé sur le boitier (4).  8 / Device according to claim 7, characterized in that the electronic assembly (20) is associated with a display (21) placed on the housing (4).
FR8513714A 1985-09-12 1985-09-12 Device for measuring the distance between two objects Withdrawn FR2587105A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8513714A FR2587105A1 (en) 1985-09-12 1985-09-12 Device for measuring the distance between two objects

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8513714A FR2587105A1 (en) 1985-09-12 1985-09-12 Device for measuring the distance between two objects

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FR8513714A Withdrawn FR2587105A1 (en) 1985-09-12 1985-09-12 Device for measuring the distance between two objects

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FR (1) FR2587105A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2621113A1 (en) * 1987-09-28 1989-03-31 Poilpre Claude Measurement instrument, in particular for games of bowls (boules)
FR3058071A1 (en) * 2016-11-03 2018-05-04 Magnet-O-Score PETANQUE BALL LEVIES WITH INCORPORATED METER
EP3177373A4 (en) * 2014-08-08 2018-07-18 Dascanio, Gustavo, A. Laser distance comparator for use in ball games utilizing a reference ball

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2621113A1 (en) * 1987-09-28 1989-03-31 Poilpre Claude Measurement instrument, in particular for games of bowls (boules)
EP3177373A4 (en) * 2014-08-08 2018-07-18 Dascanio, Gustavo, A. Laser distance comparator for use in ball games utilizing a reference ball
FR3058071A1 (en) * 2016-11-03 2018-05-04 Magnet-O-Score PETANQUE BALL LEVIES WITH INCORPORATED METER
EP3318307A1 (en) * 2016-11-03 2018-05-09 Magnet-O-Score Petanque ball-lifter with built-in measuring tape

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