The Swatch Group Research and Development Ltd

Nivarox-Far S.a.

Guido Plankert

Christian Charbon

Christophe Henzirohs

Pierry Vuille

Tommy Carozzani

Thomas Froelicher

Thomas Foelicher

The invention concerns a timepiece component containing a high-entropy alloy, the high-entropy alloy containing between 4 and 13 main alloying elements forming a single solid solution, the high-entropy alloy having a concentration of each main alloying element comprised between 1 and 55 at. %.

Timepiece component containing a high-entropy alloy

A method for the galvanoplastic deposition of a gold alloy on an electrode dipped into a bath including gold metal, organometallic compounds, a wetting agent, a sequestering agent and free cyanide, the alloy metals being copper metal and silver metal allowing a mirror-bright yellow gold alloy to be deposited on the electrode characterized in that the bath respects a proportion of 21.53% gold, 78.31% copper and 0.16% silver.

Method of obtaining a 18 carats 3N gold alloy

Method for fabrication of an antiferromagnetic and temperature compensated timepiece balance spring, including the steps of:

Method for fabrication of a timepiece balance spring

Method of obtaining a 18 caracts 3N gold alloy

A timepiece spring, as a mainspring, made of austenitic stainless steel including a base formed of iron and chromium, thickness of the spring being less than 0.20 mm, and the spring including, by mass: chromium: minimum value 15%, maximum value 25%; manganese: minimum value 5%, maximum value 25%; nitrogen: minimum value 0.40%, maximum value 0.75%; carbon: minimum value 0.10%, maximum value 1.00%; the total (C+N) carbon and nitrogen content between 0.40% and 1.50% by mass; the carbon-to nitrogen ratio (C/N) by mass between 0.125 and 0.550; impurities and additional metals with the exception of iron: minimum value 0%, maximum value 12.0%; iron: the complement to 100%.

Timepiece spring made of austenitic stainless steel

A method of manufacturing a ceramic element for a timepiece is provided, including forming a body made of oxide-based ceramic; exposing at least one portion of the external surface of the body to a reduction reaction, to remove oxygen atoms to a predetermined depth in order to make the at least one portion electrically conductive; depositing a metallic material starting from the at least one electrically conductive portion; and machining the body and/or the metallic material in order to provide the element with an aesthetic finish.

Method for manufacturing a selectively conductive ceramic coated with metallic material

The invention concerns the field of galvanic depositions and relates to a method of galvanoplastic deposition of a gold alloy on an electrode dipped into a bath including metal gold in alkaline aurocyanide form, organometallic compounds, a wetting agent, a sequestering agent and free cyanide. According to the invention, the alloy metals are copper, in double copper and potassium cyanide form, and silver in cyanide form, allowing a mirror bright yellow gold alloy to be deposited on the electrode.

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Boppelsen, Switzerland

Guido Plankert