Chronograph repeater mechanism with safety function

Patent metadata

Field	Value
Publication number	US-11221589-B2
Application number	US-201816205590-A
Country	US
Kind code	B2
Filing date	Nov 30, 2018
Priority date	Dec 19, 2017
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

An acoustic timepiece display mechanism includes a chronograph repeater for the acoustic display, by a striking mechanism, of a duration measured by a chronograph mechanism. The striking mechanism includes a winding lever for driving a rack to move a striking unit including a rack pinion integral with a striking ratchet, to move a striking rack to read the magnitude concerned and to release a corresponding strike function. The acoustic display mechanism includes, between a control mechanism included in the chronograph mechanism and the winding lever, a safety mechanism arranged, depending on the position of the strike wheel set, to allow or prevent travel of an operating lever of the control mechanism of the chronograph mechanism, which operating lever is arranged to be pivoted under the action of a chronograph start pusher.

First claim

The invention claimed is:

1. An acoustic timepiece display mechanism comprising a chronograph repeater for the acoustic display, by a striking mechanism, of a duration measured by a chronograph mechanism including a control mechanism having a main operating lever arranged to be pivoted under the action of a chronograph start pusher, said striking mechanism comprising an winding lever arranged to drive a rack to move a striking unit including a rack pinion integral with a striking ratchet, to move a striking rack to read a magnitude concerned and to release a strike function corresponding to the magnitude concerned,
wherein said acoustic striking mechanism includes, between said control mechanism and said winding lever, a safety mechanism arranged, depending on a position of said rack pinion, to allow or prevent travel of said operating lever.

2. The acoustic display mechanism according to claim 1 , wherein said striking mechanism includes at least one said striking rack formed by at least one of a minute rack arranged to cooperate with a minute snail cam, a tens-of-seconds rack arranged to cooperate with a tens-of-seconds cam, and a seconds rack arranged to cooperate with a seconds snail cam, and
wherein said chronograph mechanism includes at least one rotating display wheel set integral, at least in rotation, with at least one of the minute snail cam, the tens-of-seconds cam, and the seconds snail cam arranged to respectively cooperate with the minute rack, the tens-of-seconds rack, and the seconds rack, and a rim of the at least one rotating display wheel is arranged to cooperate with a beak of at least one of the minute rack, the tens-of-seconds rack, and the second rack, and wherein said winding lever is arranged to start a reading of a timed duration on at least one of the minute snail cam, the tens-of-seconds cam, and the seconds snail cam respectively corresponding to the minute rack, the tens-of-seconds rack, and the seconds rack, and to drive the rack against elastic return means forming drive means for said striking mechanism in order to read the magnitude concerned.

3. The acoustic display mechanism according to claim 1 , wherein said safety mechanism includes at least one safety lever, arranged to cooperate at a first end bearing on a cam with two levels, comprised in said striking unit, under action of elastic return means, and including, at a second opposite end, a stud which is arranged to be interposed on a trajectory of said operating lever, depending on an angular position of said at least one safety lever.

4. A timepiece comprising the acoustic display mechanism according to claim 1 .

5. The timepiece according to claim 4 , wherein said striking mechanism is distinct from said acoustic display mechanism.

6. The timepiece according to claim 4 , wherein said striking mechanism is integrated in said acoustic display mechanism.

7. The timepiece according to claim 4 , wherein said timepiece is a watch.

Assignees

• Omega Sa

Inventors

• Feyer Julien
• Capt Edmond

Classifications

• G04F7/00

  Apparatus for measuring unknown time intervals by non-electric means (using fluidic means G04F13/06) · CPC title

• G04B21/04 Primary

  Hour wheels; Racks or rakes; Snails or similar control mechanisms · CPC title

• G04F7/089

  indicating measured time by other than hands, e.g. numbered bands, drums, discs or sheet (current time indication other than by hand G04B19/20) · CPC title

• G04F7/08

  Watches or clocks with stop devices, e.g. chronograph · CPC title

• G04B21/12 Primary

  Reiterating watches or clocks · CPC title