Time-setting device for electric timepiece

Claim 2

A time-setting mechanism for an electronic timepiece, comprising in combination: a rotatable seconds-hand arbor carrying a seconds hand; a first seconds-hand pinion element fixedly mounted on said arbor; a third gear disposed in gear meshing with said first pinion element and with a second gear; a second seconds-hand pinion element loosely mounted on said arbor and disposed in meshing with a gear train which is operable by a prime mover; a clutch unit adapted for connecting said second pinion element into a unitary combination with said arbor; and a locking cam fixedly mounted on said arbor and adapted to lock the arbor when subjected to a locking pressure.

Claim 3

A time-setting mechanism for an electronic timepiece using an electronically driven prime mover, comprising: a gear train including a seconds-hand arbor and a seconds-hand pinion mounted thereon, an associated gear for transmitting motion from said prime mover to said arbor, said mechanism being characterized in that said seconds-hand pinion is divided into two elements (4; 5) (104; 105), the first element (4) (104) being fixedly mounted on said arbor (1; 101), while the second element (5) (105) is loosely mounted on said arbor, said associated gear (13) (113) being disposed in meshing with said first pinion element and a second gear, said second pinion element being adapted for receiving motion from said associated gear, and both said pinion elements being engageable with each other through a clutch unit which is operable from outside.

Claim 4

A time-setting mechanism for an electronic timepiece using an electronically driven prime mover, comprising: a gear train including a seconds-hand arbor and a seconds-hand pinion mounted thereon, an associated gear for transmitting motion from said prime mover to said arbor, said mechanism being characterized in that said seconds-hand pinion is divided into two elements (4; 5) (104; 105), the first element (4) (104) being fixedly mounted on said arbor (1; 101), while the second element (5) (105) is loosely mounted on said arbor, said associated gear (13) (113) being disposed in meshing with said first pinion element and a second gear, said second pinion element being adapted for receiving motion from said associated gear, and both said pinion elements being engageable with each other through a clutch unit which is operable from outside.

Claim 5

The mechanism as set forth in claim 2, characterized by that said arbor (1)(101) carries fixedly a locking cam for locking the arbor when desired.

Claim 6

The mechanism as set forth in claim 2, characterized by that said associated gear is divided into two elements (6)(12) which are mounted slippable with each other and kept in gear meshing with said second and first pinion elements (5)(4), respectively.