Vane anemometer having a modular impeller assembly

  • US 5,939,645 A
  • Filed: 06/23/1998
  • Issued: 08/17/1999
  • Est. Priority Date: 04/17/1997
  • Status: Expired due to Term
First Claim
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1. A vane anemometer, comprising:

  • a casing that encloses a microprocessor that calculates wind speed, calculates wind chill and determines air temperature;

    a temperature probe that is coupled to the casing and that is external to the casing, the temperature probe being in electrical communication with the microprocessor, so that the microprocessor can determine the temperature of the air; and

    a modular impeller assembly, removably inserted into the casing, comprising a periphery, an elastomeric material running around the periphery, an impeller and a magnet mounted on a rotatable shaft, such that wind causes rotation of the impeller, the magnet and the shaft, said rotation of the magnet producing an electrical signal proportional to the wind speed and the electrical signal being receivable by said microprocessor so that the microprocessor can calculate the wind speed in response to the electrical signal and the wind chill in response to the electrical signal and the temperature probe.

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