Drum chronograph

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        Drum chronograph

        Drum chronograph

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          Drum chronograph

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            Drum chronograph

              2 Archival description results for Drum chronograph

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              Drum Chronograph - Designed by Eicheus and Hadly - 1872
              IND-IIA-F040 · Fond · 1872

              This item was an instrument used to measure time. A wire rope is wound around a drum which unwinds in a fixed time under gravity. A maker which moves horizontally, marks out the time elapsed on a linear scale. This instrument was used before the invention of the pendulum clock for Astronomical measurements at the Madras Observatory.

               Eicheus