Timepiece spring made of austenitic stainless steel

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United States of America Patent

PATENT NO 10048649
APP PUB NO 20160147195A1
SERIAL NO

14896818

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Abstract

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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%.

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Patent Owner(s)

Patent OwnerAddress
NIVAROX-FAR S AAVENUE DU COLLEGE 10 CH-2400 LE LOCLE

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Charbon, Christian Chezard-St-Martin, CH 77 144
Plankert, Guido Boppelsen, CH 13 20

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