HK1090262A1 - Invisible setting of precious stones - Google Patents

Abstract

An item of jewelry ( 1 ) consisting of a central stone ( 2 ) and several peripheral stones ( 3 ) arranged on a support ( 4 ). Said support ( 4 ) comprises a first ring ( 5 ) concentric with and connected to a second ring ( 6 ) smaller in diameter and greater in height than the first ring ( 5 ). The second ring ( 6 ) comes to a T-shaped shoulder ( 8 ) on its top edge with one side designed to be snapped into a longitudinal groove ( 9 ) passing all the way around the circumference of the pavilion ( 10 ) of the central stone ( 2 ) and its other side is snapped into a groove ( 11 ) present in one of the facets near the edge of each peripheral stone ( 3 ). The peripheral stones are held firmly in their positions by a slot ( 12 ) formed on the inside of the perimeter of the first ring ( 5 ).

Description

The present invention relates to the field of jewellery, specifically to a jewellery item incorporating an invisible fastening system that allows the assembly of several gemstones (see US-A-2002166337).

This invisible fixing system allows the special arrangement of several gems to create an aesthetic appearance that gives the illusion of seeing only one large gemstone when viewed from the table.

Invisible certifying is well known and widespread in the jewellery industry.

To help you understand this exhibition, Figure 7 is a gem with indications of common terms used in the rest of this exhibition.

The width of the grooves was determined in such a way as to make the means of attachment invisible when all the stones are assembled. The groove flanges have a shoulder and some elasticity to allow the stones to be assembled by simple pressure on the stones and to keep the stones in their places by pressure from the water in longitudinal grooves cut into the back of the stone.

Another device described in document No. FR 2627359 proposes an invisible hardening with the advantage of not being cut (the cross is a technical term describing the longitudinal throats to be cut in the backbone) than a stone on two and on the other hand to reduce the appearance of the throats on the table side of the gemstone.

The diamond has two flat surfaces located on the diamond's backbone at 180° from each other just below the rounder, each of which has a longitudinal neck into which a shoulder is pushed on the inner diameter side of a cylinder serving as a support.

All the devices described in the state of the art only allow the arrangement of precious stones parallel to each other, thus limiting the geometric shape obtained to a rectangle or a square. On the other hand, these devices, although hiding the support, do not remove the appearance of the table-side throats of the precious stones when they are assembled with each other.

The purpose of the present invention is to propose an invisible or mysterious certifying system which has the peculiarity of being able to assemble around a central gemstone several pre-defined-shaped gemstones so as to remove entirely the table-side throats of the gemstones.

According to the invention, this purpose is achieved by means of a jewellery item and a decorative article according to claims 1 and 6 consisting of a central stone and several peripheral stones arranged around the central stone on a special support. This consists of a first concentric ring and a solidary ring of a second ring of a lower diameter and higher height than the first ring. The rings are solidary, for example, by means of several competing branches arranged between the base of the first and second ring at regular intervals. The second ring has a T-shaped shoulder on its upper edge, one of its sides being intended to be driven through a closed mouthpiece extending the entire length of the central stone and the other side is also held in a closed mouthpiece on one of its inner edges. These inner facets are also held in a closed mouthpiece on the other side of the peripheral ring.

This piece of jewellery has the advantage of continuous fire between the central stone (2) and the peripheral stones (3) due to the absence of the throats usually caused by the systems described in the state of the art.

Thus, this piece of jewellery has the same aesthetic appearance as ordinary gemstones of different sizes such as five, ten or fifteen carats while having a much lower cost of production since the raw material is significantly reduced.

Other features of the invention are set out in the claims and will be described below.

A method of execution of the invention will now be described as an example, by no means limiting, by reference to the schematic figures, in which: Figure 1 represents a view from the perspective of a jewellery item.Figure 2 represents a view from below the jewellery item.Figure 3 represents a view from above the jewellery item.Figure 4 represents a view of the jewellery item in a cut-out view according to line A-B of Figure 3.Figure 5a represents a view from above the central stone.Figure 5b represents a view from the front of the central stone.Figure 6a represents a view from the top of a view of the peripheral stones.Figure 6b represents a view from the front of Figure 6a.Figure 6c represents a view from the side of Figure 6a.Figure 7 represents an ordinary gemstone with the indications of the terms used in jewellery.

According to this method of execution of the present invention, a jewellery item (1) consists of an octagonal diamond (2) and eight small trapezoidal diamonds (3) which are held together by a special support (4).

The support (4) consists of a first ring (5) concentric to a second ring (6) of lower diameter and higher height than the first ring (5). The two rings (5, 6) are joined at their base by several concurrent branches (7) arranged at regular intervals. The second ring (6) has a T-shaped shoulder (8) on its upper edge. One side of the shoulder (8) is intended to be cast into a longitudinal neck (9) located on the entire circumference of the neck (10) of the octagonal diamond (2). The other side of the shoulder (8) is cast into a bright neck (11) located close to each other on the edge of each small diamond (3). This is also securely held in a perimeter position by the size of the inner rings (12) on each side of the diamond (5) allowing the other facets of the diamond to reproduce their brightness. (3) The inner rings of each small diamond (3) are also held in a perimeter position by the size of the inner rings of the diamond (5) to allow the other facets of the diamond to reproduce their brightness.

The eight small diamonds (3) were cut so that the edge of one of their sides was the same length as the edge of one of the facets (14) on the crown of the octagonal diamond (2).

The height and diameter of the first ring (5) were determined to create an angle of incidence of the table (13) of the eight small diamonds (3) corresponding to the angle of incidence of one of the facets (14) of the octagonal diamond crown (2).

The arrangement of the said facet of the octagonal diamond crown (2) is made adjacent to one of the edges of the table (13) of the small diamond (3) so as to reconstitute the bezel (15) of a diamond shiny size . The arrangement of the two facets reconstituting said bezel (15) on the same plane ensures a continuous fire.

Thus, this hardening system makes it possible to transform a genuine small diamond size 16/16 into a larger shiny size when viewed from above, using about one tenth of the raw material needed to make a genuine diamond of this type.

In this design, the cylinder (5) is continuous and opaque, thus masking the fixing device, while the cylinder (6) may have discontinuities.

The method of production is not limited and therefore, instead of the form of production described above, diamonds can be replaced by any other type of precious or semi-precious stones in order to offer jewellery with various aesthetic aspects.

The jewellery item (1) may be fitted to a ring or a pendant.

The invention is not limited to rings, but is applicable to all kinds of jewelry items such as earrings, necklaces, bracelets.

The invention also relates to a decorative article incorporating the jewellery item of the present invention.

Claims (6)

1. Item of jewellery (1) consisting of a central stone (2) and several peripheral stones (3), characterized in that said stones are arranged on a support (4) comprising a first ring (5) concentric with and connected to a second ring (6) smaller in diameter and greater in height than the first ring (5), said second ring (6) coming to a T-shaped shoulder (8) on its top edge with one side designed to be snapped into a longitudinal groove (9) passing all the way around the circumference of the pavilion (10) of the central stone (2) and its other side snapped into a groove (11) present in each peripheral stone (3), each peripheral stone also being held firmly in its position by a slot (12) formed on the inside of the perimeter of the second ring (6).
2. Item of jewellery (1) according to Claim 1, characterized in that the table (13) of each peripheral stone (3) and one of the facets (14) of the crown (4) of the octagonal central stone (2) have an identical angle of incidence.
3. Item of jewellery (1) according to Claim 1 or 2, characterized in that the length of the edge of one of the sides of each of said peripheral stones (3) is identical to the length of the edge of one of the facets (14) on the crown of the central stone (2).
4. Item of jewellery (1) according to any one of the preceding claims, characterized in that the central stone (2) is an octagonal stone with eight trapezoidal stones arranged around it.
5. Item of jewellery according to any one of the preceding claims in the form of a ring, pendant, earrings, or necklaces.
6. Decorative item comprising an item of jewellery according to one of the preceding claims.