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申请号	AT99118465	申请日	1999-09-17	公开(公告)号	AT421717T	公开(公告)日	2009-02-15
申请人	ETA SA MFT HORLOGERE SUISSE;			发明人	KAELIN LAURENT; REBEAUD JEAN-PHILIPPE;
摘要	Device comprises a cylinder (2) between a generator rotor (11) and an oscillating mass (3) of the transmission chain. The cylinder includes a helical spring (4) and a sliding leaf (6), rolled in the same direction as the spring round its turns, but without a mechanical connection to the spring. In this way it forms a protecting envelope for the spring in its open position.
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