著者
松本 栄寿
出版者
The Institute of Electrical Engineers of Japan
雑誌
電気学会論文誌A(基礎・材料・共通部門誌) (ISSN:03854205)
巻号頁・発行日
vol.117, no.7, pp.740-748, 1997-06-20 (Released:2008-07-15)
参考文献数
24
被引用文献数
1 1

Analog Indicating Electrical Instruments were developed in the last half of the nineteenth century. Having searched for the source of precision readings in the measuring such as astrolabes, Tyco's quadrant or surveyng instruments which employed nonious scales, diagonal scales and micrometer driven scales in Europe, the US and Japan from the fourteenth century, the author found that Edward Weston in the US employed diagonal scales for the precision electrical meters.Through the reproduction of old hand-drawing method of Electrical Instruments Scales which have diagonal graduations, he concluded that the diagonal scales were the most appropriate measure for precision analog electrical meters.