Watch cannon-pinion

The invention relates to a watch cannon-pinion (1). The watch cannon-pinion including a first bore (2) for receiving a pivot-shank (3) including, on either side of a recess (4), a first shoulder (5) and a second shoulder (6). This cannon-pinion (1) is made in two parts and includes, on the one hand,...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: STEPHANE BEUGIN, GAETAN VILLARD, LUCIEN GERMOND, POLYCHRONIS NAKIS KARAPATIS
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The invention relates to a watch cannon-pinion (1). The watch cannon-pinion including a first bore (2) for receiving a pivot-shank (3) including, on either side of a recess (4), a first shoulder (5) and a second shoulder (6). This cannon-pinion (1) is made in two parts and includes, on the one hand, a body (10) comprising internally the first bore (2) and externally a support shoulder (7), and on the other hand, a shape memory alloy ring (8) including a second bore (9), and, in the free state, the second bore (9) has a larger diameter than that of the support shoulder (7) when the ring is in a martensitic structure, and a smaller diameter than that of the support shoulder (7) when the ring is in an austenitic structure.