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Timepiece with a date mechanism comprising two superposed date rings

A technology for calendars and clocks, used in mechanically driven clocks, clocks, and time-indicating mechanical devices, etc., and can solve problems such as difficulty in obtaining jumpers

Active Publication Date: 2013-03-27
ETA SA MFG HORLOGERE SUISSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore it is difficult to obtain such a jumper

Method used

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  • Timepiece with a date mechanism comprising two superposed date rings
  • Timepiece with a date mechanism comprising two superposed date rings
  • Timepiece with a date mechanism comprising two superposed date rings

Examples

Experimental program
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Embodiment Construction

[0016] Starting from a general inventive idea, the present invention aims to provide a calendar mechanism for a timepiece whose bridge-action stop comprises two compact bridges that are easy to manufacture and guarantee correct positioning of the date ring. This effect is achieved because, in the prior art, since there is no tooth in one position on the ring gear of each date ring, the bridge piece must cooperate with three consecutive teeth of the ring gear of each ring to In contrast to ensuring the positioning of the ring even when passing through a missing tooth, according to the invention, the missing tooth is replaced by a thin tooth. This thin tooth has the same effect as the missing tooth, i.e. to define an extended rest position for the relevant date ring when its space is in the display position of the watch, but it ensures that the bridge will always be accommodated in said ring between two consecutive teeth of the ring gear. These bridges are thus of conventional ...

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PUM

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Abstract

The present invention discloses a calendar mechanism for a timepiece such as a wristwatch, the mechanism comprising two superimposed upper and lower calendar rings, the surface of which is divided into segments, the upper ring comprising sixteen segments, fifteen of which have consecutively marked and the sixteenth is an additional section with an opening, the lower ring contains seventeen sections, sixteen of which are marked and the seventeenth is an additional section, each said ring is associated with a drive Cooperate so that the marks appear sequentially in the display area. The calendar mechanism also includes a jumper action stop device that can stop the ring at any desired position. The calendar mechanism is characterized in that a The ring gear of the ring has thin teeth between two consecutive teeth in position, and when the additional section of the ring is at the position of the display area, the thin teeth are opposite to the driving means, so that the driving means only drives the other ring, the thin teeth do not Interfering with the movement of the drive means and making the stop means permanently housed between two consecutive teeth of the ring.

Description

technical field [0001] The invention relates to a large date mechanism comprising two superimposed date rings, one above and one below. One of the rings bears fifteen consecutive markers out of the 31 positions of a cycle, while the other bears another sixteen markers. technical background [0002] Cycle counting and display devices having apertures for displaying the date in calendar timepieces are known. In general, an analogue display of the date is conventionally performed using a calendar ring comprising 31 segments marked from 1 to 31. However, such a device has the disadvantage that only an area whose size corresponds to one thirty-first of the circumference of the ring is provided for each segment. Especially in small wristwatches, this area is not sufficient for the date display to be easily read. There is therefore a need for a device capable of displaying a "big date" over an area much larger than one thirty-first of the circumference. [0003] The first solut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G04B19/247G04B19/253G04B19/24G04B19/25
CPCG04B19/25G04B19/25366G04B19/25306
Inventor R·维勒曼R·梅茨格M·贝泰利
Owner ETA SA MFG HORLOGERE SUISSE