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self-recording pressure plate anemometer
self-recording pressure plate anemometer

self-recording pressure plate anemometer

Datecirca 1888
Inventory Number1996-1-0137
ClassificationAnemometer
Subject
    Attributed to A. Lawrence Rotch 1861 - 1912
    User Blue Hill Meteorological Observatory 1885-present
    Place of Use
      Dimensionsanemometer: 103 × 21 × 11.4 cm (40 9/16 × 8 1/4 × 4 1/2 in.)
      recording tube: 29.2 × 5.9 × 5.9 cm (11 1/2 × 2 5/16 × 2 5/16 in.)
      Material
        DescriptionThis instrument consists of a triangular metalic casing through which passes a long rod. At one end of the rod was put the pressure plate (1996-1-0137a). The other end is equipped with a spring, providing resistance to the plate. Inside the casing is a stylus that would inscribe the movement of the rod on a recording paper set on a rotating tube.
        Signedunsigned
        Curatorial RemarksAlso known as BH 114. Used with Inv. BH 134 (1996-1-0137a).
        FunctionA pressure plate anemometer measures wind speed in terms of the drag which the wind exerts on a solid body. (It is also known as plate anemometer.) This device (with its plate, 1996-1-0137a) was set into the wind and the wind pressure would push and pull a small stylus found inside the anemometer. The stylus draws a line on a specially calibrated paper put on a revolving tube. The pressure numbers recorded on the paper would then be converted into wind speed.
        ProvenanceFrom the Blue Hill Meteorological Observatory.
        Historical Attributes Used w/ Inv. BH 134 (1996-1-0137a).
        plate for pressure plate anemometer
        plate for pressure plate anemometer
        A. Lawrence Rotch
        Date: circa 1888
        Object number: 1996-1-0137a
        maximum gust anemometer
        maximum gust anemometer
        A. Lawrence Rotch
        Date: circa 1886
        Object number: 1996-1-0136
        rotating clock cylinder, nonslotted, for self-recording anemometer
        rotating clock cylinder, nonslotted, for self-recording anemometer
        American
        Date: 1900-1950
        Accessories: steel spindle assemblage
        Object number: 1996-1-0729a
        nipher shield
        nipher shield
        A. Lawrence Rotch
        Date: circa 1886
        Accessories: part of 1996-1-0183b
        Object number: 1996-1-0183b
        membership certificate given to Lawrence Rotch
        membership certificate given to Lawrence Rotch
        A. Lawrence Rotch
        Date: 1890-1900
        Object number: 1998-1-1077
        self-recording rain gauge
        self-recording rain gauge
        Sterling P. Fergusson
        Date: date 1888
        Accessories: Instruction pamphlet
        Object number: 1996-1-0088
        weather vane and cup anemometer for Draper wind direction and speed recorder
        weather vane and cup anemometer for Draper wind direction and speed recorder
        Blue Hill Meteorological Observatory
        Date: 1890-1910
        Accessories: additional cup (1996-1-0145c)
        Object number: 1996-1-0145b
        pressure gauges for tube anemometer
        pressure gauges for tube anemometer
        Blue Hill Meteorological Observatory
        Date: circa 1892
        Object number: 1998-1-0418a
        pressure tube anemometer
        pressure tube anemometer
        Date: circa 1900
        Object number: 1998-1-1257
        Dines' portable anemometer
        Dines' portable anemometer
        C. F. Casella & Co. Ltd.
        Date: circa 1905
        Object number: 1996-1-0157
        Dines' portable anemometer
        Dines' portable anemometer
        L. Casella
        Date: 1890-1905
        Object number: 1996-1-0158
        anemometer, Dines pressure-tube type
        anemometer, Dines pressure-tube type
        William H. Dines
        Date: circa 1891
        Object number: 1998-1-0907