てこの弾性支点についての研究 : 交さ板ばね支点について

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タイトル別名
  • Research on the Elastic Fulcrum of Lever Using an Elastic Fulcrum of Cross Flexure
  • テ コノ ダンセイ シテン ニ ツイテ ノ ケンキュウ コウサ イタバネ シテン ニ ツイテ

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抄録

The fulcrum of single flexure used as the fulcrum of the lever of a scale, because of its construction in which the lever is hunging supported with the flexure, was unavoidably accompanied by lateral vibration of lever, rendering it extremely difficult to read the correct angle of the inclination of the lever, while, on the other hand, the lever could not be used where lateral force was applied to the fulcrum, as in the case of an upper-dish scale where the Roberval structure is adopted. Thus, for the purpose of eliminating such lateral vibration as mentioned above, and, at the same time, in order that the lever be used where lateral force is liable to be applied, the present author has conceived a construction in which two equal-size flexures, mutually crossing at the right angle, would be used before and after, the lever being hung at this very point. In the present paper, effort has been made to introduce a formula on the sensitivity of such an elastic fulcrum of cross flexure, and, at the same time, to ascertain that the dispersion of the equilibrium position of the lever will be drastically reduced as compared with the knife edge fulcrum, and, thus, the applicability of cross flexure as the fulcrum of the lever of a scale has been examined.

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