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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Julabo Labortechnik ： ウィキペディア英語版 Julabo Labortechnik Julabo GmbH is an international manufacturer of temperature-control technology for research and industry. The company was originally based upon Ernst Juchheim's (1901–1969) development of contact thermometers in 1926. == Background == Early glass contact thermometers used in temperature control were equipped with solid contacts. They were able to switch an attached device, such as a heater, on and off at short intervals by way of a contact protection relay as well as trigger an acoustic warning function. However, for more complex applications, variable setting of the temperature value was required. Ernst Juchheim, a master designer of glass instruments, fulfilled this requirement in 1926 with the development of the world's first glass contact thermometer with variable temperature adjustment. In 1927, his invention was granted a patent in Germany. Juchheim's glass contact thermometer consisted of two temperature scales of equal size, constructed of frosted glass, and arranged with one on top of the other. They were connected by an electrically conductive metal filament and a sliding contact in a capillary tube. The desired temperature was set on the upper scale by sliding a movable magnet on the outside of the thermometer. Sliding the magnet simultaneously moves the tip of the lower scale's metal filament to the same value. As soon as the column of mercury reaches the selected setpoint (due to rising temperature), an electrical contact is established, thereby switching the heating device on and off at short intervals in response to changes in the temperature. This process is repeated continuously and results in a control accuracy of approximately 0.1 °C. The control thermometer was commonly used for measurement and control tasks in laboratories and industrial environments until the 1970s. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Julabo Labortechnik」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.