FR2462226A1

FR2462226A1 - Two way built in spirit level for portable drill - indicates horizontal and vertical bit alignments using diagonal mirror in cuboid capsule

Info

Publication number: FR2462226A1
Application number: FR7919258A
Authority: FR
Original assignee: REVOL JEAN
Current assignee: REVOL JEAN
Priority date: 1979-07-26
Filing date: 1979-07-26
Publication date: 1981-02-13
Also published as: FR2462226B1

Abstract

The two-way spirit level is built into the back of a portable power drill, permitting the truly horizontal or vertical alignment of the drill bit. It comprises a sealed (6) e.g. cuboid translucid capsule (5) with a base flange and with part spherical internal depressions (3,4) in one wall and the invert, being installed in a drill housing socket. The capsule is part filled with liquid (2) to provide a bubble (1), and contains a diagonal mirror (M) which may be mounted on a tapered plug. The bubble gravitates into the centre of depressions (3,4) to indicate vertical and horizontal bit alignment respectively, the former image being reflected to the eyepiece by the mirror.

Description

L'objet de la présente invention est un accessoire se montant sur les petites perceuses électriques ( ou me pneumatiques ) portatives se te- nant à la main. The object of the present invention is an accessory mounted on small portable electric (or pneumatic) drills held by hand.

Cet accessoire est un niveau liquide à bulle permettant à lwutili- sateur de maintenir l'ase de le perceuse soit horizontal soit vertical. This accessory is a liquid spirit level allowing the user to keep the drill base horizontal or vertical.

Ce niveau se distingue dos autres niveaux classiques par le fait que l'horizontalité et la verticalité sont repérables par un même et seul niveau comportant une seule bullevisible d'un seul et même enté. This level is distinguished from other classic levels by the fact that horizontality and verticality can be identified by the same single level comprising a single visible bubble from one and the same entry.

Il est a noter qu'actuellement il est souvent malaisé de percer des trous rigoureusement verticaux ou horizontaux, dans nant une perceuse å la main.Bien sûr,pour les trous verticaux on peut monter la perceuce portative sur un support vertical,la transformant ainsi en perceuse seneitive d'établi;mais encore faut-il que la pièce puisse se placer sur la table du suppert ce qui n'est pas toujoure le oas.De plus,ce support est d'un prix non négligeable et d'un oncombrement certain tandis que le niveau proposé est mimuscule et peu couteux. It should be noted that currently it is often difficult to drill rigorously vertical or horizontal holes, using a hand drill. Of course, for vertical holes you can mount the portable drill on a vertical support, thus transforming it into seneitive bench drill; but it is still necessary that the piece can be placed on the suppert table which is not always the oas. while the level offered is tiny and inexpensive.

Pour obtenir la verticalité et l'horizontalité,voici ce que l'invention propose:
Premièrement: Placer le niveau à l'arrière de la perceuse,de l'autre cêté du mandrin,c'est-à-dire devant les yeux de l'utilisateur.Ce niseau s'il est de fores cylindrique peut facilement s'encastrer dus un trou sur l'arrière de la perceuse ( figure 1 et figure 2 ).To obtain verticality and horizontality, here is what the invention offers:
First: Place the level at the back of the drill, on the other side of the mandrel, that is to say in front of the user's eyes. This niseau if it is cylindrical in shape can easily be embedded due to a hole on the back of the drill (Figure 1 and Figure 2).

Deuxièmement: Pour obtenir la verticalité, rien de nouveau a ce qui se fait communément, il suffit que la surface intérieure du niveau soit une calotte sphérique ou quasi-sphérique et qu'elle soit d'un axe paralléle à l'axe du mandrin.Donc lorsque la perceuse est verticale ( figure 6 ) ,la bulle se trouve au sommet de la surface sphérique directement visible par transparence du corps da niveau ( figure 3 ) .Un repère qui peut être un cercle de couleur permettra de faciliter cette lecture. Second: To obtain verticality, nothing new to what is commonly done, it suffices that the interior surface of the level is a spherical or quasi-spherical cap and that it is of an axis parallel to the axis of the mandrel. So when the drill is vertical (figure 6), the bubble is at the top of the spherical surface directly visible by transparency of the level body (figure 3). A mark which can be a colored circle will facilitate this reading.

Troisièmement: Pour obtenir l'horizontalité avec le même niveau,il faut d'abord remarquer que l'invention ne permettra de repérer l'horizontalité que lorsque la perceuse sera tenue poignée quasi-verticale.A ce moment là,il suffit de placer à l'intérieur du niveau une autre calotte sphérique ou quasi-sphérique perpendiculairement à la première et du cte opposé à la poignée c' est-à-dire vers le haut lorsque la perceuse est tenue horizon- talement. ( figure I et figure 2 )
Donc lorsque la perceuse sera horizontale, la bulle viendra se lo ger au sommet de cette deuxième surface et pour voir la bulle à travers le repère de la première surface, il suffira alors de placer convenablement un miroir à 45 O à l'intérieur du niveau ( figure 4 ).Thirdly: To obtain horizontality with the same level, it should first be noted that the invention will only make it possible to identify horizontality when the drill is held with a quasi-vertical handle. At this point, it suffices to place inside the level, another spherical or quasi-spherical cap perpendicular to the first and on the side opposite the handle, that is to say upwards when the drill is held horizontally. (figure I and figure 2)
So when the drill is horizontal, the bubble will come to lie at the top of this second surface and to see the bubble through the mark on the first surface, it will then suffice to place a mirror 45 ° inside the level (figure 4).

Ainsi lorsque la bulle sera à l'intérieur du repère, la perceuse aura son axe horizontal et sa poignée verticale. So when the bubble is inside the mark, the drill will have its horizontal axis and its vertical handle.

Il est à noter que le miroir ne gêne pas l'observation lorsque la perceuse est verticale. It should be noted that the mirror does not interfere with observation when the drill is vertical.

En conclusion,par l'observation de la seale face visible du niveau encastrée,on on peut apprécier soit l'horizontalité soit la verticalité de la perceuse. In conclusion, by observing the seale face visible from the built-in level, we can appreciate either the horizontality or the verticality of the drill.

Ce qui suit est une réflexion sur la fabrication et non sur le prin cipe:
Il semble qu'industriellement la forme extérieure la plus adaptée serait la forme cylindrique ou légèrement conique d'un diamètre de 12 à 20 mi afin de permettre son logement dans un trou sur l'arrière de la perceuse,
Ce niveau pourrait être collé et/ou coincé, la longueur de ce niveau pourrait être de I2 à 20 mm.The following is a reflection on the manufacturing and not on the principle:
It seems that industrially the most suitable external shape would be the cylindrical or slightly conical shape with a diameter of 12 to 20 mi in order to allow its accommodation in a hole on the back of the drill,
This level could be glued and / or stuck, the length of this level could be from I2 to 20 mm.

Ce niveau pourrait être en deux pièces principales scellables au montagercorps et bouchon.Le miroir pourrait être solidaire du bouchon. This level could be in two main parts which can be sealed with the body and cap. The mirror could be fixed to the cap.

Le plastique moulé translucide pourrait convenir à sa fabrication0
La précision de ce niveau sera limitée car la bulle vibrera lors du fonctionnement de la perceuse mais au départ et pendant les arrêts,l'uti- lisateur pourra apprécier verticalité et horizontalité.Translucent molded plastic may be suitable for its manufacture0
The precision of this level will be limited because the bubble will vibrate during the operation of the drill but at the start and during stops, the user will be able to appreciate verticality and horizontality.

Figure 5: 5: Ce niveau peut avoir son principe perfectionné au prix d'une complication de fabrication. Ce perfectionnement consiste à remplacer la deuxième calotte sphérique par une portion de sphére de la forme d'un tonnelet symétrique et d'axe confondu avec celui de la calotte sphérique assurant la verticalité d'une part et d'autre part à monter le miroir sur un axe et à lester d'un poids p pour qu'il garde toujours une position verticale mê- me lorsque la poignée fera un angle a@ec la verticale,8 ce moment,on pourrait repèrer l'horizontalité de la perceuse même lorsque la poignée n'est pas dans un plan vertical. Figure 5: 5: This level can have its principle perfected at the cost of a manufacturing complication. This improvement consists in replacing the second spherical cap with a portion of a sphere in the shape of a symmetrical keg and an axis coincident with that of the spherical cap ensuring the verticality on the one hand and on the other hand to mount the mirror on an axis and ballasting with a weight p so that it always keeps a vertical position even when the handle will make an angle with the vertical, 8 at this time, we could identify the horizontality of the drill even when the handle is not in a vertical plane.

Claims

R E V E N D I C A T I O N S

1) Bubble and liquid level built into the back of portable electric drills. This level allows you to identify either the horizontality or the verticality of the axis of the mandrel or of the perch by means of a single bubble which depending on the horizontal or vertical position of the drill comes to be housed in one of the two spherical or quasi-spherical caps with perpendicular axes. Drill allows verticality to be assessed directly by framing the image of the bubble.

As for the horizontality, a mirror inclined at 45 inside the liquid allows to appreciate it on the pre: 1st cap by returning the image of the bubble which is under the second horizontal cap not visible because recessed, when the drill is horizontal. (figure I)

20) Level according to claim I characterized in that it internally comprises two spherical or quasi-spherical concave caps.

Once the level is mounted on the drill, the axis of the first shell visible on the back of the drill is parallel or coincides with the axis of the man

Horsehair while the axis of the second cap is coincident or parallel to the vertical plane of symmetry of the drill. These two axes are perpendicular; the second cap is on the side opposite the handle, i.e. upwards.

30) Level according to claims I and 2 characterized in that inside the liquid, there is a plane or quasi-plane mirror inclined at 450 relative to the horizontal or to the vertical, oriented on the side of the concavities of the caps and whose center is at the intersection of the axes of symmetry of the two caps. The plane of this mirror is perpendicular to the axis of symmetry of the drill.

40) The level according to claims I, 2 and 3 can be improved by replacing the second spherical cap with a symmetrical surface in spherical barrel (figure 5) with an axis parallel to the axis of the mandrel and by mounting a ballasted mirror towards the bottom can pivot on an axis parallel to the axis of the drill.This allows to appreciate the horizontality even if the handle of the drill is not vertical.