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Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
American Amsler
American Steam Gauge & Valve Mfg. Co.
Chrome plated brass
ca. 1925
Determining Mean Effective Pressure from indicator diagrams

Notes: "Designed by James W. See, an engineer in Cincinnati, Ohio, this planimeter was first manufactured by The American Steam Gauge & Valve Manufacturing Co. in 1879. It was sold by both American and Crosby, and possibly others. It was marketed as the ""American Amsler"" planimeter, being a simplified version of Amsler's Type 1 polar planimeter. It is an elegant design, with very few parts. There is no multiplier wheel, indicating it was for measuring small areas, such as indicator diagrams. The pole arm weight is missing. The serial number is 4887."

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