DEVICE FOR MEASURING THE DEVELOPED WIDTH OF THE NAIL PLATE.

Abstract

Appareil de mesure de la largeur développée de la plaque unguéale. L'appareil est du type pied à coulisse avec vernier composé d'une réglette graduée (1) et de deux pièces en équerre (2, 3), dont l'une est fixe et dont l'autre coulisse sur la réglette (1); chaque extrémité (4, 5) des deux équerres (2, 3) est pourvue d'un tube cylindrique de guidage (6, 7) pour un fil (8); le fil (8) est monté coulissant dans lesdits tubes (6, 7), une extrémité dudit fil (8) comporte un nœud de blocage (14), l'autre extrémité du fil (8) comporte de la longueur de fil supplémentaire, de manière à permettre l'écartement des deux pièces en équerre (2, 3); le point zéro ou point de calage (20), qui correspond au point où les deux pièces en équerre (2, 3) sont jointives, permet au zéro de la réglette graduée (1) de l'équerre (2) de correspondre avec le zéro du vernier de l'équerre (3); ce point zéro correspond au point où les deux tubes (6, 7), qui font office de moyen de guidage au fil (8), sont également en contact au niveau de leurs extrémités libres. Appareil de mesure notamment pour podologues.

Description

The invention relates to a device for measuring the developed width of the nail plate. The patent application filed on November 7, 1989 under No. 89 14637 describes a caliper-type device with vernier, consisting of a graduated ruler and two right-angled pieces, one of which is fixed and the other of which slides on the ruler to allow the thickness of the object clamped between these two right-angled pieces or jaws to be evaluated, characterized by the fact that each end of the two right-angled pieces is provided with a wire guide means, such as a cylindrical tube arranged parallel to the end of the right-angled piece.The two tubes are long enough to exceed the length of the brackets. A wire enters one end of one of the cylindrical tubes, oriented towards the base of the bracket, exits the other end of the same tube, and enters the end of the tube of the other bracket, on the point side, exiting the other end of that same tube. The wire is slidably mounted within the tubes. One end of the wire has a locking knot, and the other end has an additional length of wire to allow the two pieces to be separated at an angle. On the side of the free end of the wire, the bracket has, near the corresponding tube, a means for locking the wire. According to a preferred embodiment, the cylindrical tubes are parallel in their first part and are inclined towards each other in the second part, as soon as they pass the point of the brackets. The wire locking mechanism is a flexible bar that locks the wire against the body of the right-angled piece. The zero point alignment between the two right-angled pieces is achieved when the two wire guide means, such as tubes, have their ends in contact. The accompanying drawings are provided as illustrative and non-limiting examples. They represent a preferred embodiment of the invention and will facilitate understanding of the invention. Figure 1 is a top view of the device, highlighting the sliding of the wire in the tubes with arrows. In this figure 1, the ends 4, 5 of the brackets 2, 3 are separated from each other. Figure 2 is a view of the device when the two tubes are joined at their ends and when the two indices are set to the zero point. The device is of the caliper type with vernier, consisting of a graduated ruler 1 and two right-angled pieces 2,3, one of which is fixed and the other slides on the ruler 1 to allow evaluation of the thickness of the object clamped between these two right-angled pieces 2, 3 or jaws, characterized by the fact that each end 4, 5 of the two right-angled pieces 2, 3 is provided with a wire guide means, such as a cylindrical tube 6, 7 arranged parallel to the end of the right-angled piece.The two tubes 6, 7 are of such a length that they exceed the length of the brackets 2, 3; a wire 8 enters one end 9 of one of the cylindrical tubes 7 oriented towards the base of the bracket 3, exits through the other end 11 of the same tube 7 and enters the end 12 of the tube 6 of the other bracket 2, on the point side of the bracket 4, to exit through the other end 13 of this same tube 6; said wire 8 is mounted to slide within said tubes 6, 7, one end of the wire 8 has a locking knot 14, the other end of the wire 8 has an additional length of wire 15, so as to allow the two pieces to be separated into a bracket 2, 3. On the side of the free end of the wire 8, the bracket 2 has, near the corresponding tube 6, a locking means 16 for the wire 8. The zero point or calibration point 20, which corresponds to the point where the two right-angled pieces 2, 3 are joined, allows the zero of the graduated ruler 1 of the right-angled piece 2 to correspond with the zero of the vernier of the right-angled piece 3. This zero point corresponds to the point where the two tubes 6, 7, which act as a means of guiding the wire 8, are also in contact at their free ends 11, 12. The use of the measuring device can be described as follows. The device is placed opposite the nail, the podiatrist places each end 11, 12, of each tube 6, 7 in the bottom of the groove in contact with the lateral edge. Thread 8 is stretched over the nail. Wire 8 is fixed by locking onto the flexible bar 16. The instrument is free from the nail. Wire 8 is stretched by sufficiently separating the two pieces at right angles 2, 3. The podiatrist determines, through reading, the dimension which allows the choice of the appropriate staple from a range or assortment of staples. REFERENCES 1. graduated ruler 2. first right-angled piece 3. second right-angled piece 4. first end of the right-angled piece 5. second end of the right-angled piece 6. cylindrical tube 7. cylindrical tube 8. wire 9. end of tube 7 11. second end of tube 7 12. end of tube 6 13. end of tube 6 14. locking knot 15. extra length of wire 16. wire locking device 20. zero point or setting point

Claims

DEMANDS 1. A caliper-type apparatus with a vernier scale comprising a graduated scale (1) and two right-angled pieces (2, 3), one of which is fixed and the other of which slides on the scale (1) to allow the thickness of the object clamped between these two right-angled pieces (2, 3) to be evaluated, according to claim 1 of the main patent application, characterized by the fact that that each end (4, 5) of the two brackets (2, 3) is provided with a cylindrical guide tube (6, 7) for a wire (8), said tube (6, 7) is arranged parallel to the end (4, 5) of the bracket, the two cylindrical tubes (6, 7) have a length such that they exceed the length of the brackets (2, 3), a wire (8) enters one of the ends (9) of one of the cylindrical tubes (7) oriented towards the side of the base of the bracket (3), exits through the other end (11) of the same tube (7) and enters the end (12) of the tube (6) of the other bracket (2), on the point side of the bracket (4), to exit through the other end (13) of this same tube (6); the wire (8) is mounted sliding in said tubes (6, 7), one end of said wire (8) has a locking knot (14), the other end of wire (8) has additional wire length (15), so as to allow the two pieces to be separated at right angles (2, 3);the zero point or calibration point (20), which corresponds to the point where the two right-angled pieces (2, 3) are joined, allows the zero of the graduated ruler (1) of the right-angled piece (2) to correspond with the zero of the vernier of the right-angled piece (3); this zero point corresponds to the point where the two tubes (6, 7), which act as a means of guiding the wire (8), are also in contact at the level of their free ends (11, 12).