Adjustment mechanism for timepiece display mechanism with rollers

Patent metadata

Field	Value
Publication number	US-11543778-B2
Application number	US-201916405173-A
Country	US
Kind code	B2
Filing date	May 7, 2019
Priority date	Jun 18, 2018
Publication date	Jan 3, 2023
Grant date	Jan 3, 2023

Abstract

An adjustment mechanism for a timepiece display including an input wheel driving a control wheel controlling the position of a first display member, and including a differential mechanism which includes a drive wheel set retained by a jumper and pivotable via the first input wheel, to drive a planetary wheel meshing with the control wheel and pivoting off-centre with respect to a planetary wheel holder friction-mounted on a frame, the differential mechanism multiplying by a particular factor the rotation between one of the inputs and the output of the differential mechanism when the other input is stationary, and the planetary wheel holder includes manipulating device allowing a watch technician to release the friction to change the angular position of the planetary wheel and thus of the control wheel for correct indexing thereof with respect to another display member.

First claim

The invention claimed is:

1. An adjustment mechanism for a timepiece display mechanism comprising at least a first input wheel arranged to drive, directly or indirectly, a first control wheel for controlling the position of a first display member comprised in said display mechanism, the adjustment mechanism comprising:
a differential gear train mechanism which includes a drive wheel set retained by a display jumper and is arranged to be pivoted by said first input wheel, and arranged to drive at least one planetary wheel meshing with said first control wheel and mounted pivotally and off-centre with respect to a planetary wheel holder friction-mounted, either inside a cavity of a frame of said adjustment mechanism, or by internal friction on a shoulder of said frame, said differential gear train mechanism being arranged to multiply by a particular factor the rotation between one of the inputs and the output of said differential mechanism when the other input is stationary, and
wherein said planetary wheel holder includes manipulating means arranged to allow a watch technician to release said planetary wheel and change the angular position of said planetary wheel, which determines the position of said first control wheel for the correct indexing thereof with respect to at least one other display member of said display mechanism.

2. A display mechanism including at least one said adjustment mechanism according to claim 1 , wherein said display mechanism is an instantaneous or semi-instantaneous display mechanism, in that said first input wheel is a large wheel including at least 24 teeth,
wherein said display mechanism includes at least one drive wheel set including at least one finger arranged to drive, directly or indirectly, said first input wheel, and wherein said display mechanism includes, between each said drive wheel set and said first input wheel, at least one intermediate wheel including a number of teeth less than or equal to half the number of teeth of said first input wheel, in that each said finger is arranged to cooperate with said intermediate wheel or with a star pivoting integrally with said intermediate wheel, and
wherein said display mechanism includes at least one input jumper, for a locked position in mesh only with said intermediate wheel or with a said star, and a correction jumper also in mesh only with said intermediate wheel or with a said star, for the change of said position.

3. The display mechanism according to claim 2 , wherein at least one said intermediate wheel pivots integrally with a said star.

4. The display mechanism according to claim 2 , wherein said display mechanism includes one said drive wheel set which is a drive wheel set and one said drive wheel set which is a correction wheel set.

5. The display mechanism according to claim 2 , wherein, on each jump in position of said at least one intermediate wheel, said intermediate wheel is arranged to shift by only one tooth said first input wheel or a second input wheel pivoting synchronously with said first input wheel.

6. The display mechanism according to claim 5 , wherein said display mechanism includes a said second input wheel or a front wheel pivoting synchronously with said first input wheel, and said second input wheel or front wheel cooperates with at least one said intermediate wheel.

7. The display mechanism according to claim 2 , wherein at least one said intermediate wheel has a pivot axis orthogonal to that of said first input wheel or of a second input wheel pivoting synchronously with said first input wheel.

8. The display mechanism according to claim 2 , wherein said display mechanism includes only one said intermediate wheel arranged to cooperate with each said drive wheel set.

9. A watch comprising at least one display mechanism according to claim 2 .

10. A display mechanism including the adjustment mechanism according to claim 1 , wherein said display mechanism is a roller display mechanism, wherein said first display member is a first roller, and wherein at least one said other display member is a second roller coaxial to said first roller.

11. The display mechanism according to claim 10 , wherein said second coaxial roller is arranged to be driven, directly or indirectly by said first input wheel or by a second input wheel pivoting synchronously with said first input wheel.

12. The display mechanism according to claim 11 , wherein said second coaxial roller is arranged to be driven, directly or indirectly, by a second input wheel pivoting synchronously with said first input wheel and having an incomplete toothing.

13. The display mechanism according to claim 10 , wherein said roller includes at least one flap having two faces, with two display symbols on either side, pivoting integrally with a pinion arranged to pivot when meshing with a toothed sector comprised in a frame of said display mechanism.

14. The display mechanism according to claim 13 , wherein said display mechanism is a date display mechanism, in that said first roller is a units display roller driven indirectly by a said first input wheel which is a 31-tooth wheel from which one tooth is removed or from which two consecutive teeth are removed, and wherein said second roller is a tens roller directly driven by a second input wheel pivoting synchronously with said first input wheel and which is a truncated 31-tooth wheel with only 4 teeth remaining in positions 10, 20, 30 and 31 teeth, and wherein said first roller includes five said pivoting flaps bearing on the ten faces thereof the numerals from zero to nine.

15. The display mechanism according to claim 13 , wherein said display mechanism is a date display mechanism, in that said first roller is a units display roller driven indirectly by a said first input wheel, which is a 31-tooth wheel from which one tooth is removed, or from which two consecutive teeth are removed, and wherein said second roller is a tens roller driven directly by a second input wheel pivoting synchronously with said first input wheel and which is a truncated 31-tooth wheel having only 4 teeth remaining in positions 10, 20, 30, and 31 and wherein said display mechanism includes a roller for indicating the days of the week and including one or three pivoting flaps.

16. The display mechanism according to claim 13 , wherein said display mechanism is a date display mechanism, in that said first roller is a units display roller driven indirectly by a said first input wheel which is a 31-tooth wheel from which one tooth is removed, or from which two consecutive teeth are removed, and wherein said second roller is a tens roller, driven directly by a second input wheel pivoting synchronously with said first input wheel and which is a truncated 31-tooth wheel having only 4 teeth remaining in positions 10, 20, 30 and 31, and wherein said display mechanism includes a roller for indicating the months and including six pivoting flaps.

17. The display mechanism according to claim 10 , wherein said display mechanism is a date display mechanism, in that said first roller is a units display roller driven indirectly by a said first input wheel, which is a 31-tooth wheel from which one tooth is removed, or from which two consecutive teeth are removed, and wherein said second roller is a tens roller, driven directly by a second input wheel pivoting synchronously with said first input wheel and which is a truncated 31-tooth wheel with only 4 teeth remaining in positions 10, 20, 30 and 31.

18. The display mechanism according to claim 10 , wherein said display mechanism includes a roller for indicating

Assignees

• Montres Breguet Sa

Inventors

• Zaugg Alain
• Riedo Christophe

Classifications

• G04B19/205

  by means of sheets · CPC title

• G04B19/26

  Clocks or watches with indicators for tides, for the phases of the moon, or the like {(planetaria G09B27/00 - G09B27/06; arrangements for table reference, e.g. menstrual tables G06C3/00)} · CPC title

• G04B19/24386 Primary

  sheet-shaped (G04B19/24306 takes precedence; flap-shaped for electrically driven timepieces G04C17/0033) · CPC title

• G04B19/207

  by means of bands (bands as time indicating means with a reference mark or window G04B19/04) · CPC title

• G04B13/008

  Differentials · CPC title