Patent Number: 6,166,999

Title: Clock with a mainspring wound state indicator

Abstract: To reduce a number of parts constituting a spring winding state display device and downsize a movement, a device including a first sun wheel installed with a first sun wheel gear 152 and a first sun wheel arbor 154. A second sun wheel 160 is provide with a second sun wheel gear 162 and a second sun wheel pinion 164. The second sun wheel gear 162 is in mesh with an intermediate ratchet wheel 140. A planetary reduction wheel gear 170 is in mesh with a barrel gear 126. A first planetary wheel 172 and a second planetary wheel 174 are rotatably arranged to a planetary reduction wheel gear 170 with centers of rotation thereof disposed at portions different from a center of rotation of the planetary reduction wheel gear 170. The first planetary wheel 172 rotates while revolving around the second sun wheel pinion 164. The second planetary wheel 174 rotates while revolving around the first sun wheel gear 152. A sun wheel finger 180 is attached to a third axle portion 154c such that it can slip.

Inventors: Jujo; Koichiro (Chiba, JP), Takizawa; Katsuyoshi (Chiba, JP), Shibiya; Norio (Chiba, JP)

Assignee: Seiko Instruments Inc.

International Classification: G04B 9/00 (20060101); G04B 009/00 (); G04B 001/10 (); G04B 001/00 ()

Expiration Date: 12/26/2017