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short interval timer
short interval timer

short interval timer

Datecirca 1924
Inventory Number1996-1-0335
ClassificationTimer
Subject
    Maker Mann Instrument Company 1920 - 1959
    Cultural Region
      Place of Origin
        Dimensions13 x 17 x 17 cm (5 1/8 x 6 11/16 x 6 11/16 in.)
        Material
          DescriptionA timer, mounted on a four-footed metal base, with the timer dial on the top of the instrument and the timer mechanism mounted below. The timer dial, a rectangular metal plate, painted white, has circular scale marked in increments of 1 from 0-10, and a smaller inset circular scale, in increments of 10 from 0 to 110. Each scale has a single rotating pointer.

          According to the patent application, the timer utilizes a vibratory mechanism, instead of a spring, allowing faster timing intervals.

          In U.S. Patent filings, the device is described as a "Stop Watch Mechanism," Patent No. 1,509,899, September 30, 1924, Serial No. 455,805, issued to David W. Mann of Lincoln, Massachusetts.
          Signedon face: MANN / SHORT INTERVAL / TIMER
          Inscribedon face near bottom: PATENTED SEPT. 30, 1924 / No. 400
          FunctionShort interval timer.
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