Hairspring with curve elevation made from a silicon-based material

摘要

The hairspring (1) has a spiral spring (3) made of a single piece and coaxially provided with a shell (5), a Phillips type terminal curve (7) and an elevation device (9) between an external loop (15) of the spiral spring and the terminal curve. Two unique parts are integrated to increase precision of development of the hairspring. The elevation device has a strut connecting an end of an outer loop at one end of the external loop to an end of the terminal curve and realized in a single piece with a spiral spring-shell assembly. An independent claim is also included for a method for manufacturing a hairspring.