|Manufactured in||Around 1944|
|Manufactured by||Aeronautical Research Institute, the Tokyo Imperial University
(Now, Research Center for Advanced Science and Technology)
|Owner||The National Museum of Nature and Science, Tokyo|
|Location of historical materials||The National Museum of Nature and Science, Tokyo 7-20 Ueno Park, Taito-ku, Tokyo 110-8718 Japan|
|Visitor information||Open to the public|
|Contact||The National Museum of Nature and Science, Tokyo Tel.+81-3-5777-8600 http://www.kahaku.go.jp/|
This is an analogue calculator made by Dr. Tathujiro Sasaki, Mr. Ryo Shiga and others for working out nine simultaneous linear algebraic equations. The original machine was designed and made by Dr. John B. Wilbur assistant professor of Civil Engineering, Massachusetts Institute of Technology in 1936 to solving for complex calculations on civil engineering and electrical engineering. Some of these machines were made in other countries. However all of them seemed to disappear except this Japanese one.
A cast iron frame holds ten brass bars which are able to tilt independently. And each bar has ten pulleys which moves form side to side on the bar, and metal tapes attached to pulleys. Tilting all bars fixed pulleys to perform calculations, solution for the equations are represented by the lengths of tapes.