×

Rain detector for automatic irrigation systems

  • US 5,321,578 A
  • Filed: 04/17/1992
  • Issued: 06/14/1994
  • Est. Priority Date: 04/17/1992
  • Status: Expired due to Fees
First Claim
Patent Images

1. A rain detector for interrupting the regular cycle of an automatic irrigation system having a controller and at least one electrically actuated sprinkler valve, comprising:

  • a detector housing;

    a rainwater collection tray having an open top area adapted to be exposed to rain for the collection of rainfall and disposed partially below said housing;

    a pair of conductive sensors protruding from said housing into said rainwater collection tray;

    a switching circuit means disposed within said housing for providing electrical connection between the controller and the sprinkler valve when said pair of sensors form an open circuit and electrical disconnection between the controller and the sprinkler valve when the level of rainwater within said rainwater collection tray bridges said pair of sensors;

    means for varying said open top area exposed to rain of said rainwater collection tray; and

    a plurality of upstanding posts rising from the bottom of said rainwater collection tray to prevent leaves and similar large area debris from settling to the bottom of said rainwater collection tray.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×