Calendar driving mechanism for date and week day indicating timepiece

Claim 1

In a date and week day indicating timepiece, a calendar driving mechanism comprising, in combination, a rotary date indicator, a rotary week day indicator, a driving wheel making 1 revolution in 24 hours and automatically indexing said indicators, a date indexing member and a week day indexing member each being movable from a rest position to a bent position and being permanently urged toward its rest position, and a detent mechanism becoming engaged in a first predetermined position of said driving wheel and being released in a further predetermined position of said driving wheel, said detent mechanism, upon being engaged, causing both said indexing members to move from their rest position toward their bent position under the control of said driving wheel until said driving wheel reaches said further predetermined position thereby liberating said indexing members simultaneously and permitting them to return in rest position while indexing said indicators in unison, one of said indexing members being mounted for rotary motion coaxially to said driving wheel, a first spring means being bent between said driving wheel and said one indexing member, the other one of said indexing members consisting of a rocking lever being mounted at the side of said driving wheel and set under the action of a second spring means.