Timepiece display correction mechanism

Patent metadata

Field	Value
Publication number	US-11360433-B2
Application number	US-201916291002-A
Country	US
Kind code	B2
Filing date	Mar 4, 2019
Priority date	Mar 26, 2018
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

A correction mechanism for a timepiece date display mechanism, arranged to change the angular position of a display wheel set comprised in such a date display mechanism, this correction mechanism includes, on the one hand, a control wheel set arranged to be controlled by user action and/or by a timepiece mechanism, and on the other hand, an output wheel set arranged to cooperate with such a display wheel set; this correction mechanism includes a free wheel mechanism which is arranged to disengage the output wheel set from the control wheel set in a first relative direction of rotation, and to engage the output wheel set with the control wheel set in a second relative direction of rotation opposite to the first relative direction of rotation.

First claim

The invention claimed is:

1. A correction mechanism for a timepiece date display mechanism, arranged to change the angular position of a display wheel set comprised in said date display mechanism, said correction mechanism comprising:
a control wheel set arranged to be controlled by user action and/or by a timepiece mechanism;
an output wheel set arranged to cooperate with said display wheel set; and
a free wheel mechanism which is arranged to disengage said output wheel set from said control wheel set in a first relative direction of rotation, and to engage said output wheel set with said control wheel set in a second relative direction of rotation opposite to said first relative direction of rotation,
wherein said control wheel set or respectively said output wheel set is integral in rotation with a rotor,
wherein said output wheel set or respectively said control wheel set includes a cavity inside which said rotor can pivot,
wherein said rotor and/or said cavity includes at least a first chamber of variable radial cross-section with respect to the pivot axis of said rotor,
wherein at least one free wheel is enclosed inside said chamber, and whose dimensions are arranged to allow said free wheel freedom inside said chamber in said first relative direction of rotation of said rotor with respect to said cavity, and to cause said free wheel to lock on a wall of said chamber in said second relative direction of rotation of said rotor with respect to said cavity, and
wherein said free wheel is movable only in a plane perpendicular to said pivot axis of said rotor.

2. The correction mechanism according to claim 1 , wherein the peripheral surface of said rotor forms a cam in each said chamber, in a plane perpendicular to an axis of rotation common to said output wheel set and to said rotor.

3. The correction mechanism according to claim 1 , wherein the peripheral surface of said rotor forms a cam in each said chamber, in a direction parallel to an axis of rotation common to said output wheel set and to said rotor.

4. The correction mechanism according to claim 1 , wherein said control wheel set, said output wheel set, said rotor, and each said free wheel, are made of non-magnetic material.

5. The correction mechanism according to claim 4 , wherein said control wheel set, said output wheel set, said rotor, and each said free wheel are made of ceramic material.

6. The correction mechanism according to claim 1 , wherein said correction mechanism includes, in said output wheel set or said control wheel set, a single pivot shoulder arranged to cooperate with a structure or plate or bridge of a timepiece mechanism or of a movement to which said correction mechanism is arranged to be fixed.

7. A date display mechanism comprising a display wheel set and a correction mechanism according to claim 1 .

8. A timepiece comprising a date display mechanism comprising a display wheel set, and a control wheel set arranged to be controlled by user action and/or by a timepiece mechanism comprised in said timepiece and/or by a movement comprised in said timepiece, which includes a correction mechanism according to claim 1 , arranged to correct the position of said display wheel set to change the date display.

9. The timepiece according to claim 8 , wherein the timepiece is a watch.

10. A correction mechanism for a timepiece date display mechanism, arranged to change the angular position of a display wheel set comprised in said date display mechanism, said correction mechanism comprising:
a control wheel set arranged to be controlled by user action and/or by a timepiece mechanism;
an output wheel set arranged to cooperate with said display wheel set; and
a free wheel mechanism which is arranged to disengage said output wheel set from said control wheel set in a first relative direction of rotation, and to engage said output wheel set with said control wheel set in a second relative direction of rotation opposite to said first relative direction of rotation,
wherein said control wheel set or respectively said output wheel set is integral in rotation with a rotor,
wherein said output wheel set or respectively said control wheel set includes a cavity inside which said rotor can pivot,
wherein said rotor and/or said cavity includes at least a first chamber of variable radial cross-section with respect to the pivot axis of said rotor, and wherein at least one free wheel is enclosed inside said chamber, and whose dimensions are arranged to allow said free wheel freedom inside said chamber in said first relative direction of rotation of said rotor with respect to said cavity, and to cause said free wheel to lock on a wall of said chamber in said second relative direction of rotation of said rotor with respect to said cavity,
wherein said free wheel is movable both in a plane perpendicular to said pivot axis of said rotor and parallel to said pivot axis of said rotor.

11. The correction mechanism according to claim 10 , wherein the peripheral surface of said rotor forms a cam in each said chamber, both in a plane perpendicular to an axis of rotation common to said output wheel set and to said rotor, and in a direction parallel to said axis of rotation.

12. A correction mechanism for a timepiece date display mechanism, arranged to change the angular position of a display wheel set comprised in said date display mechanism, said correction mechanism comprising:
a control wheel set arranged to be controlled by user action and/or by a timepiece mechanism;
an output wheel set arranged to cooperate with said display wheel set; and
a free wheel mechanism which is arranged to disengage said output wheel set from said control wheel set in a first relative direction of rotation, and to engage said output wheel set with said control wheel set in a second relative direction of rotation opposite to said first relative direction of rotation,
wherein said control wheel set or respectively said output wheel set is integral in rotation with a rotor,
wherein said output wheel set or respectively said control wheel set includes a cavity inside which said rotor can pivot,
wherein said rotor and/or said cavity includes at least a first chamber of variable radial cross-section with respect to the pivot axis of said rotor, and
wherein at least one free wheel is enclosed inside said chamber, and whose dimensions are arranged to allow said free wheel freedom inside said chamber in said first relative direction of rotation of said rotor with respect to said cavity, and to cause said free wheel to lock on a wall of said chamber in said second relative direction of rotation of said rotor with respect to said cavity,
wherein each said chamber includes, in the same circumferential direction as all the other said chambers, a progressive enlargement area on an inclined surface, followed by an enlarged area limited by a stop surface, and wherein said free wheel is free in said enlarged area in said first relative direction of rotation, and locked and supported on said inclined surface in said second relative direction of rotation.

13. A correction mechanism for a timepiece date display mechanism, arranged to change the angular position of a display wheel set comprised in said date display mechanism, said correction mechanism comprising:
a control wheel set arranged to be controlled by user action and/or by a timepiece mechanism;
an output wheel set arranged to cooperate with said display wheel set; and
a free wheel mechanism which is arranged to disengage said output wheel set from said control wheel set in a first relative direction of rotation, and to engage said output wheel set with said control wheel

Assignees

• Montres Breguet Sa

Inventors

• Rochat Jean-Philippe

Classifications

• G04B19/24 Primary

  Clocks or watches with date {or week-day} indicators {, i.e. calendar clocks or watches}; Clockwork calendars · CPC title

• G04B27/04

  with clutch wheel {(support and displacement of the winding stem through the case, means for preventing the stem from going too far, fixation G04B37/06)} · CPC title

• G04B13/02

  Wheels; Pinions; Spindles; Pivots (bearings G04B31/00 {; chain wheels, spindles for chain wheels, also chains and driving weights G04B1/08}) · CPC title

• G04B11/001

  Clutch mechanism between two rotating members with transfer of movement in both directions, possibly with limitation on the transfer of power · CPC title

• G04B13/00

  Gearwork {(gearwork for driving the hands G04B19/02; calibers G04B33/00; dispositions and components for transmission in general F16H)} · CPC title