"Biram's Patent" Anemometer

Description
Portable, single-dial, eight-vane, mechanical anemometer with carrying or hanging loop at top. Device consists of a circular brass band with exterior frame around its vertical middle that holds a central shaft in place that is turned by the spatulate-shaped vanes and connected to a small circular dial, marked 1 to 9 with "X" at zero place, at center front of frame. Top front crossbar of frame engraved "Biram's Patent" while bottom front crossbar has "Davis & Son", "647" and "A" (sideways), all in roman letters.
The anemometer measures wind velocity in order to determine the volume of air entering or exiting mine shafts. It was invented in 1844 by Benjamin Biram (1804-1857), house steward to the Earl Fitzwilliam, who owned several coal mines in South Yorkshire, England. Scientific instrument maker John Davis (1810-1873) of Derby, England, first manufactured the device in 1845; and anemometers based on Biram's patent continued to be produced by the successor firms of John Davis & Son and Davis Derby until the mid 20th century.
Location
Currently not on view
date made
1850 - 1875
place made
United Kingdom: England, Derby
Physical Description
brass (band; frame elements; handle material)
metal, sheet (vanes material)
steel (mechanism; pointer on dial material)
silvered brass (dial face material)
Measurements
overall: 1 1/4 in x 4 1/2 in x 4 1/8 in; 3.175 cm x 11.43 cm x 10.4775 cm
ID Number
1982.0090.55
accession number
1982.0090
catalog number
1982.0090.55
Credit Line
Gift of Estate of John Paul Remensnyder
See more items in
Home and Community Life: Domestic Life
Domestic Furnishings
Data Source
National Museum of American History, Kenneth E. Behring Center

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