Horology: time measuring systems or devices – Mechanical time base – Mainspring
Reexamination Certificate
2011-05-17
2011-05-17
Kayes, Sean (Department: 2833)
Horology: time measuring systems or devices
Mechanical time base
Mainspring
C368S318000, C368S324000
Reexamination Certificate
active
07942573
ABSTRACT:
A timepiece includes a platen (10) and a barrel mounted on the platen, the barrel including: a drum (20) with a bottom and side walls; a shaft (14) extending through the drum at the center thereof and provided with pivoting elements (40, 54) on the platen; a leaf spring provided in the drum and co-operating with the shaft at one end and with the drum at the other end; and a lid (28) through which the shaft extends and closing the drum, a ratchet wheel (30) being kinematically connected to the shaft for winding the spring. According to the invention, the drum is pivoted via a first ball bearing (34) having a bushing (36) connected to the platen and another bushing (38) connected to the bottom of the drum.
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International Search Report dated Jun. 30, 2008, from corresponding PCT application.
Eterna SA Fabrique d'horlogerie
Kayes Sean
Young & Thompson
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