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A 1915 Swiss Planimeter. This is an area measuring instrument for areas with irregular figures. The pole weight contains a steel pin in the bottom to make it stay put. The pole arm connect the pole weight to the carriage and the tracer arm connect the tracer point to the carriage. This caused the carriage to always move around a semi-circle regardless of the shape the tracer point followed. Underneath the carriage is a measuring wheel, and rotation of the wheel is proportional to the area traced. In impeccable shape. Made by G.Coradi Zurich. Comes with original box and conversion table. |
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