US2726521A

US2726521A - Mounting for precious stones

Info

Publication number: US2726521A
Application number: US231167A
Authority: US
Inventors: Melik-Minassiantz Raphael
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-06-14
Filing date: 1951-06-12
Publication date: 1955-12-13
Anticipated expiration: 1972-12-13

Description

3. 1955 R. MELlK-MINASSIANTZ 2,726,521

MOUNTING FOR PRECIOUS STONES Filed June 12, 1951 United States Patent MOUNTING FGR PRECIOUS STONES Raphael Melik-Minassiantz, Paris, France Application June 12, 1951, Serial No. 231,167 Claims priority, appiication France June 14, 1950 1 Claim. (Cl. 63-27) The object of the present invention is a new embodiment of a mounting for precious stones on jewellery. It is in particular destined to enhance the appearance of diamonds notably in increasing their effect.

The object of the present invention is a double mounting. It comprises a first setting in platinum, the contour of which is adapted to that of the diamond which is set therein, either by the agency of points of very small dimensions, or by overlapping on the complete periphery of the diamond at the edge of the setting. A second support having a hollowed or solid base is equipped with claws by which is held said first setting: the two elements of the complete mounting are maintained by the second support at a certain distance the one from the other. The second support is solidly fixed to the jewel by soldering for example.

The present invention enhances the effect of the diamond by creating the illusion of a stone of greater volume than in reality.

The annexed drawing shows as a non limitative example a method of the realization of the present invention.

Fig. 1 represents a front view of the diamond inserted into its first support.

Fig. 2 is a cross section of the line AB of Fig. 1.

Fig. 3 represents a front view of the second support.

Fig. 4 is a side view of the second support.

Fig. 5 represents the ensemble of the diamond and its double support.

Fig. 6 is a cross section of the line C-D of Fig. 5.

In the example represented diamond 1 is mounted in a platinum setting 2, where it is maintained by the agency of points 3, overlapping as little as possible the surface of said diamond. The setting 2, which forms the inner element of the mounting, is of inverted frusto-pyramidal form with its larger base directed upwardly. As seen in the drawings this inner element directly receives and supports the diamond.

The diamond is assumed here to be of circular form, mounted in a square setting.

The outer element 4 of the mounting, which may be seen in Figs. 3 to 5, is of inverted frusto-conical form with its larger base directed upwardly and is formed with a series of claws 5 which extend upwardly and define a central chamber for receiving the inner element 2. The distance between opposite outer edges of the lower smaller base of the inner element 2 is approximately equal to the diameter of the upper larger base of the outer frusto- 2,726,521 Patented Dec. 13, 1955 conical element 4 within the claws 5. When the inner element 2 is secured in the outer element 4, as shown in Figs. 5 and 6, the claws 5 overlie the sides of element 2 and overlie the upper edges of this element for locking engagement with it. The claws 5 are equal in number to the sides of the inner element 2 and are regularly spaced. By reason of this structure, the corners of the inner element 2 project centrally in the spaces between the claws beyond the periphery of the upper larger base of the frusto-conical outer member 4.

The double mounting theretofore described has the advantage of creating the illusion of a diamond of greater volume than in reality, allowing the realization of jewels of striking effect with relatively small stones and at a low-cost.

It is understood that the forms and details of execution can be varied without departing from the framework of the present invention.

In particular, for the first support, the contour of the setting can envelop exactly that of the stone. In this case the setting can be obtained by overlapping the edge of the support on to the diamond, care being taken to encroach the least possible onto the surface of the stone.

I claim:

In a mounting for precious stones, in combination, an inner element of inverted frusto-pyramidal form with its larger base directed upwardly, said inner element directly receiving and supporting the precious stone by engaging said stone from below and being provided with means for simultaneously engaging a limited portion of the upper surface of the stone whereby the stone is retained against dislodgment in any direction, said means engaging the stone upper surface lying on the diagonals of said larger base, and an outer element having a plurality of claws extending upwardly therefrom and defining a central chamber receiving said inner element, said outer element being of inverted frusto-conical form with its larger base directed upwardly and adjacent the lower smaller base of said inner element, the distance between opposite side edges of the lower smaller base of said in ner element is approximately equal to the diameter of the upper larger base of said outer element, said claws of said outer element overlying the sides of said inner element and overlying the upper edges of the inner element for locking engagement therewith, said claws being equal in number to the sides of said inner element and being regularly spaced, and the cornersof said inner element projecting centrally in the spaces between said claws beyond the periphery of the upper larger base of said frusto-conical outer member.

References Cited in the file of this patent UNITED STATES PATENTS 253,450 Van Houten Feb. 7, 1882 717,824 Dover Jan. 6, 1903 722,824 Dover Mar. 17, 1903 1,548,646 Akeson Aug. 4, 1925 2,239,302 Pritchard Apr. 22, 1941 FOREIGN PATENTS 588,891 Great Britain June 5, 1947