Abstract: A timepiece or piece of jewelry includes an alloy containing at least 750 wt.-‰ gold, characterized in that the alloy comprises at least 200‰ copper, 19‰-35‰ palladium and 1‰-16‰ indium. Optionally, the alloy may contain at least one grain refining element, and also optionally, the alloy may contain at least one element selected from the group consisting of Ca, Sr, Si, Zr, and Mg.

Abstract: The present invention relates to a gray gold alloy free of nickel and copper having a hardness that is suitable in particular for watchmakers and jewellers. Said alloy consists of (in wt %): more than 75% of Au; more than 18% to less than 24% of Pd; more than 1% to less than 6% of at least one element selected from among Mn, Hf, Nb, Pt, Ta, V, Zn and Zr; optionally, no more than 0.5% of at least one element selected from among Si, Ga and Ti; and optionally, no more than 0.2% of at least one element selected from among Ru, Ir and Re. The invention also relates to a method for preparing said alloy.

Abstract: The invention relates to a timepiece or piece of jewellery comprising an alloy containing at least 750 wt.-‰ gold, characterised in that the alloy comprises at least 200‰ copper, 4‰-35‰ palladium and 1‰-16‰ indium.

Abstract: The invention relates to a timepiece or piece of jeweler comprising an alloy containing at least 750 wt.-% gold, characterised in that the alloy comprises at least 200% copper, 4%-35% palladium and 1%-16% indium.

Abstract: The invention relates to a timepiece or piece of jewelry comprising an alloy containing at least 750 wt.-‰ gold, characterised in that the alloy also contains copper, palladium and indium, the sum of the concentrations of palladium and indium being less than or equal to 35‰, or less than or equal to 30‰, or even less than or equal to 25‰, and/or the sum of the concentrations of palladium and indium being between 15‰ and 35‰, or between 20‰ and 35‰, or even between 25‰ and 33‰.

Abstract: The invention relates to a timepiece or piece of jewelry comprising an alloy containing at least 750 wt.-‰ gold, characterised in that the alloy comprises copper, calcium at a concentration of less than or equal to 10‰ or 7‰ or even 5‰, and/or silicon at a concentration of less than or equal to 2‰ or less than or equal to 0.5‰.

Abstract: The present invention relates to a white gold alloy free of nickel and copper having a hardness that is suitable in particular for watchmakers and jewellers. Said alloy consists of (in wt %): more than 75% of Au; more than 18% to less than 24% of Pd; more than 1% to less than 6% of at least one element selected from among Mn, Hf, Nb, Pt, Ta, V, Zn and Zr; optionally, no more than 0.5% of at least one element selected from among Si, Ga and Ti; and optionally, no more than 0.2% of at least one element selected from among Ru, Ir and Re. The invention also relates to a method for preparing said alloy.

Abstract: The invention concerns a device comprising at least a transducer (1) in the form of a matrix wherein is embedded an optical fiber segment (7) provided with means designed to modify light transmission in accordance to a stress to be measured. One input end of said optical fiber (7) is designed to be connected to an optical transmitter (8) and one output end to an optical detector (9). The transducer (1) is elongated in shape, longitudinally run through by said optical fiber segment (7). A median section (2) is designed to be subjected to stresses to be measured, its two ends being respectively secured to two portions transmitting stresses (3, 4) to said median section (2), arranged to be attached to the structure to be measured Said matrix is made of a composite material reinforced with filaments to provide the transducer (1) with a modulus of elasticity close to that of the structure to be measured.