File:Kreuger anemometer 1855.jpg

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Kreuger_anemometer_1855.jpg ‎(287 × 456 pixels, file size: 31 KB, MIME type: image/jpeg)

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English: Anemometer (wind speed measuring device) designed by Johan Henrik Kreuger (1782-1858) around 1850. Drawing by Axel Erdmann, 1855.
  • Functional description (see figure): The pressure plate h, supported by two pairs of friction wheels, can move in a frame fastened to the wind vane g. The axis of the vane is a tube (Kreüger suggested a musket pipe). With a cord running in the tube, the pressure plate is connected to a lever with a scale and a counterweight o. Two clicks q lock the scale and counterweight at the maximum indication. The instrument thus records the maximum wind pressure since last release of the clicks. After the first tests, the vane was equipped with a V-shaped fin to dampen its oscillations. The sensor should be placed on the lighthouse master's house with the wind vane at the height of the chimney, and with the lever and the scale in the attic. A 32-point wind rose on the tube (not shown in the figure) showed the wind direction. The instrument also had a primitive recording device (not shown in the figure), a piece of chalk on the lever writing on a circular plate. A pendulum clockwork rotated the plate. This device was probably not used.
Date Image uploaded June 2009
Source Anemometer, designed by Johan Henrik Kreuger (1782-1858).
Author Drawing by Axel Erdmann, 1855.


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current14:49, 14 June 2009Thumbnail for version as of 14:49, 14 June 2009287 × 456 (31 KB)Lidingo (talk | contribs){{Information |Description={{en|1=Anemometer (wind speed measuring device) designed by Johan Henrik Kreuger (1782-1858) around 1850. Drawing by Axel Erdmann, 1855.}} |Source=[http://www.vos.noaa.gov/MWL/Images/anemometer.jpg Anemometer], designed by Johan

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