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Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
The Lippincott Planimeter
Hine & Robertson Co.
Chrome-plated brass
Determining Mean Effective Pressure from indicator diagrams

Notes: "This is a very unusual planimeter, but at it's core it works exactly the same as the Willis planimeter, from which is borrowed the sharp-edged wheel as its recording mechanism. Instead of having a rotating triangular ruler with scales, like the Willis, this uses paper scales sealed inside glass tubes. And further, the tracing wheel slides along the glass tube while an area is being measured! This is a very interesting and rare planimeter."

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