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Timepiece with a date mechanism comprising two superposed date rings

A technology for calendars and clocks, which is applied to mechanically driven clocks, clocks, and time-indicating mechanical devices, and can solve problems such as difficulty in obtaining jumpers

Active Publication Date: 2012-11-07
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

[0021] The present invention starts from the idea of ​​general invention and aims to provide a calendar mechanism for timepieces. On the one hand, the calendar mechanism includes a drive that rotates once every twenty-four hours and drives the calendar ring by acting on the teeth of the calendar ring. The wheel, on the other hand, includes a correction device for quickly changing the display provided by the calendar mechanism. To achieve this effect, the calendar ring includes two inner circumferential ring gears, one of which is used to cooperate with the driving wheel, and the other is used to cooperate with the correction device. Moreover, each of the ring gears has a position missing teeth to define an extended rest position of the associated ring. More specifically, when the vacant position of a ring (the opening of the upper ring and the unmarked section of the lower ring) is in the display position of the watch, the driving wheel and the correction device are opposite to...

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PUM

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Abstract

Date mechanism for a timepiece such as a wristwatch including two superposed respectively upper and lower date rings, whose surface is divided into a plurality of sectors comprising successive sector and extra sector, each of said rings cooperating with drive means such that the markings of the lower ring appear successively in a display zone, the date mechanism being wherein each ring includes two peripheral toothings, the teeth of the upper and lower rows of the upper ring being superposed, whereas the teeth of the upper and lower rows of the lower ring are staggered, one location of each of the toothings of the upper and lower rings being tooth free, and in that said date mechanism further includes a correction device, the position of the drive means with respect to the upper and lowertoothings of the respectively upper and lower rings, and the position of the correction mechanism with respect to the lower and upper toothings of the respectively upper and lower rings being such that when the upper ring has its extra sector at the location of said display zone, the drive means and the correction device are located respectively opposite the tooth free location of the toothing ofthe upper row and that of the lower row of the upper ring, and vice versa.

Description

Technical field [0001] The present invention relates to a large calendar mechanism, which includes two superimposed calendar rings on the upper and lower sides, respectively. One of the rings bears fifteen consecutive marks out of 31 positions in one cycle, and the other bears another sixteen marks. Background technique [0002] A cycle counting and display device with an opening for displaying the date in calendar timepieces is known. Generally, analogue display of the date is conventionally performed using a calendar ring containing 31 segments marked from 1 to 31. However, such a device has a disadvantage in that each section is provided with only one area whose size is equivalent to one thirty-first of the circumference of the ring. Especially in small wristwatches, the area is insufficient for the date display to be easily read. Therefore, a device that can display the "big calendar" in an area much larger than one thirty-one of the circumference is needed. [0003] The fi...

Claims

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Application Information

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