Report on Test method for "Shock resistant" wrist watches___-

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  • 耐衝撃試験方法の実験検討報告
  • タイ ショウゲキ シケン ホウホウ ノ ジッケン ケントウ ホウコク

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Abstract

Regarding to the quality standard and test method for wrist watches bearing the mention "Shock resistant", international work on this subject was commenced in 1965 by ISO. And, in 1973, International Standard on this subject have been established and published as ISO 1413 "Shock resistant wrist watches". At present, this International Standard have been used widely, for example, through being introduced to national standards of many countries. New proposal on test method, hower, was presented from Switzerland to ISO last year. ISO decided that member bodies are asked to examine the test method based on Swiss proposal. According to this resolution, we carried out experiments on test methods for shock resistant wrist watches. From the results, the following conclusions may be deduced. 1) Residual effect and damage rates by shocks in the two tilted positions [figure] are much lower in comparison with those in the horizontal and vertical positions [figure] under the ISO n0w in force. The tow tilted positions exert little influence. 2) There is no characteristic result by shocks in these two tilted positions. We do not think, therefore, it is necessary to make tests in the two tilted positions. 3) Evident cumulative effect of shocks are not observed wholely, but as to some individual sample, this effect is observed. Therefore, it is better to make tests successively in two horizontal and vertical positions provided in the present ISO. The text of this paper. is eliminated here, as the whole results are already published on the Annual Report of Study and Research of JHI for 1977, to which the reders are requested to refer.

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