Chemical balance - Chemical balance

…Basically, a manual balance has a downward blade fixed in the center, supported by a blade rest, and two upward blades fixed at both ends equidistant from the fulcrum, with a plate suspended from the force point and weight point of the primary lever (a beam) via a blade rest, and a direct-reading balance has a counterweight fixed to the force point, which is balanced with a plate and an internal weight equivalent to the weighing capacity (maximum amount that can be measured) hung on the weight point of the beam. Manual balances are also called degree table balances because the balance of the beam is measured with a scale called a degree table, and their structure is typified by the chemical balance used in the field of chemistry shown in Figure 1. Each part of the balance is supported by a rest arm, and the blade and blade rest made of precious stones (agate, ruby, sapphire, etc.) are separate. …

*Some of the terminology explanations that refer to "chemical balance" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…基本的には中央に下向きの刃を固定し刃受けで支え支点とし，支点から左右等距離の両端に上向きの刃を固定し，力点，重点とする第1次てこ(さお)の力点と重点に刃受けを介して皿をつるした手動てんびんと，さおの重点に皿と秤量(測定できる最大量)に相当する内蔵分銅を掛けた状態でつり合うカウンターウェイトを力点に固定した直示てんびんとに大別される。　手動てんびんはさおのつり合いを度表と呼ばれる目盛板で測定することから度表てんびんとも呼ばれ，その構造は図1に示す化学の分野で使用する化学てんびんに代表される。てんびん各部は休め腕で支えられ，宝石(メノウ，ルビー，サファイアなど)製の刃と刃受けは切り離されている。…

※「化学てんびん」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報