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AUTOMATIC RECORDING RAIN GAUGE

  • US 3,721,122 A
  • Filed: 11/30/1970
  • Issued: 03/20/1973
  • Est. Priority Date: 12/01/1969
  • Status: Expired due to Term
First Claim
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1. A rain gauge comprising a rainwater-collection container, a positive-displacement pump connected to pump rainwater from the container, sensor means for detecting when the level of rainwater collected in the Container reaches an upper predetermined level and when the said level falls below a lower predetermined level, switching means controlled by the sensor means, for starting the pump whenever the collected rainwater reaches the upper predetermined level and for stopping the pump whenever the level of the collected rainwater falls below the lower predetermined level, and measuring means coupled to the pump for providing a representation of the number of cycles of operation of the pump and thereby affording a measure of the amount of rainwater collected in and pumped from the container.

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