Mechanical timepiece comprising a tourbillon
The invention relates to a timepiece consisting of a main plate ( 24 ) having the following components mounted thereto: a time base which is formed by a tourbillon ( 16 ) comprising a rotatable frame, which appears in an opening ( 14 a ) in the dial ( 14 ) thereof; and time information display means which are controlled from the time base. The aforementioned display means comprise a rotatable ring ( 40 ) which appears in the opening ( 14 a ) in the dial, co-axially around the frame, and ring drive means.
1. A timepiece comprising a main plate ( 24 ) and, mounted on the latter, a time base formed by a tourbillon ( 16 ) comprising a rotatable frame ( 28 ) which appears in an opening ( 14 a ) made in a dial of the timepiece ( 14 ), and time information display means controlled from said time base, characterized in that said means comprise a rotatable ring ( 40 ) which appears in said opening around said frame ( 28 ), coaxially with it, and elements driving this ring.
2. The timepiece as claimed in claim 1 , characterized in that said frame ( 28 ) is mounted rotatably between said main plate ( 24 ) and an additional plate ( 12 ).
3. The timepiece as claimed in claim 2 , characterized in that said plate ( 12 ) comprises cutouts ( 36 ) through which the tourbillon ( 16 ) appears.
4. The timepiece as claimed in claim 3 , characterized in that said ring ( 40 ) is mounted rotatably inside a groove ( 38 ) made in said plate ( 12 ).
5. The timepiece as claimed in claim 4 , characterized in that said ring ( 40 ) is associated with a toothed wheel ( 44 ) which is concentric with it and co-operates with said driving means.
6. The timepiece as claimed in claim 5 , characterized in that said toothed wheel ( 44 ) also co-operates with means of manual adjustment of the position of said ring.
7. The timepiece as claimed in claim 5 , characterized in that said ring ( 40 ) is held in place by at least one platelet ( 62 ) fixed to said plate ( 12 ) and protruding into said groove ( 38 ) so as to fit between said ring ( 40 ) and said toothed wheel ( 44 ).
8. The timepiece as claimed in claim 1 , characterized in that said ring ( 40 ) is a date indicator.
9. The timepiece as claimed in claim 2 , characterized in that said ring ( 40 ) is a date indicator.
10. The timepiece as claimed in claim 3 , characterized in that said ring ( 40 ) is a date indicator.
11. The timepiece as claimed in claim 4 , characterized in that said ring ( 40 ) is a date indicator.
12. The timepiece as claimed in claim 5 , characterized in that said ring ( 40 ) is a date indicator.
13. The timepiece as claimed in claim 6 , characterized in that said ring ( 40 ) is a date indicator.
14. The timepiece as claimed in claim 7 , characterized in that said ring ( 40 ) is a date indicator.