Rain gauge

  • US 5,038,606 A
  • Filed: 07/27/1989
  • Issued: 08/13/1991
  • Est. Priority Date: 07/27/1989
  • Status: Expired due to Term
First Claim
Patent Images

1. A rain gauge comprising:

  • a central elongated tube;

    indicia extending vertically along the lateral axes of said tube and spaced apart from each other a predetermined distance;

    an interface means mounted to the top of the tube and a closure in the bottom of said tube;

    the interface means having a collecting opening for receiving rain water;

    said collecting opening having an area which is larger than the area of at least a portion of the tube by a factor equal to a unit of rainfall indicated in the indicia at the location of the diameter of the tube divided by the factor;

    said interface means being a funnel shaped collector communicating with the top of the tube whereby rain may flow from the collector into the tube;

    said interface means including an open top portion of sufficient size to hold substantial water, a horizontal plate having holes in it through which the water may flow into the tube and a bottom portion fitting within the tube and forming a sealing relation therein, said holes being sufficiently small so as to avoid debris falling into the tube and being less than 1/2 inch in diameter;

    said funnel shaped collector being capable of holding at least two cubic inches of water.

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