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Time-meter connecting mechanism

A technology for joining mechanisms and timers, applied to time-indicating mechanical devices, instruments, mechanically driven clocks, etc., can solve problems such as deformation and unfavorable elasticity

Inactive Publication Date: 2004-05-19
ETA SA MFG HORLOGERE SUISSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It will also be observed that in the stop or zero chrono position occupied most of the time, the flexible arm 15 is permanently stressed, which will obviously lead to at least partial deformation, which is not good for its elasticity

Method used

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Experimental program
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Embodiment Construction

[0019] image 3 A complete top view showing the constituent parts of the engagement mechanism, Figure 4 A further simplified but larger scale is represented in , and in Figure 5 Middle is a cross-sectional view. exist image 3 , 4 In and 5, the engaging means are shown in the disengaged position. As previously described, the positional change of the engagement device is controlled by the cam disc 1 , which is actuated by a button and rotationally driven by a finger 26 acting on the outer toothing 3 , while being held in a defined position by the jumper spring 5 . The cam 1 also includes internal teeth 2 formed by a series of pockets 4 and flats 6 . The pitch ratio between the inner teeth 2 and the outer teeth 3 is 1:2 (for example, there are 40 teeth on the inside and 80 teeth on the outside), so that the step-by-step forward movement of the cam 1 alternately makes the tooth pocket 4 and the plane 6 faces the reference position.

[0020] In the same manner as conventi...

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PUM

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Abstract

The coupling wheel (17) is brought into friction with an intermediate second wheel (19), or, conversely, to moved away therefrom by a fork (16) formed in the large arm (22) of an L-shaped coupling spring (20), articulated at the joining portion of the two arms (22, 24) on an adjustment plate (30), the small arm (24) of said coupling spring (20) having its end stressed by the end of a control lever (10). Means for guiding (32a, 32b) and positioning by a cam screw (38) allow the distance between the small arm (24) of the coupling spring (20) and the end of the control lever (10) to be modified, which thus allows manufacturing tolerances to be compensated for.

Description

technical field [0001] The present invention relates to a chronograph engagement mechanism utilizing a lever designed, on the one hand, to prevent any hindrance in reaching the working position from a stop or zero chrono position, and, on the other hand, to precisely adjust the The forces exerted by the ends of the joints again offset to some extent the unavoidable manufacturing tolerances present in the many moving parts that form the control means of the joint mechanism. Background technique [0002] In order to better understand the present invention, first briefly describe the closest prior art known to the applicant, with reference to figure 1 with figure 2 , which schematically represent the control device of the engagement mechanism when it is in the timer working position in plan view and sectional view, respectively. as from figure 1 As seen in , the engagement device is actuated by a cam disc 1 having a drive tooth 3 on its outer side, on which a lever actuated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04B19/02G04F7/08
CPCG04F7/0828G04F7/08G04B19/02
Inventor P·黑费利A·布伦
Owner ETA SA MFG HORLOGERE SUISSE