Abstract: A shelter for crustaceans adapted to convert to a trap to facilitate harvesting. The shelter is a rectangular structure with a sound- and light-impervious and end walls, and a corrugated metal roof. The side of the structure are constituted by hinged doors pivotable from a horizontal position allowing access to the interior of the shelter to a vertical position closing such access. The movement from open to closed position is effected by cables having one end attached to the door and the other end to a marker float via a main cable.

Abstract: A method and apparatus for obtaining water at a desired temperature from a generally vertical tank such as a water heater is disclosed, characterized in that water is drawn from the tank at a plurality of spaced vertical points where the water temperature has the desired temperature. The tank contains a quantity of water having a variable non-uniform temperature. A vertical pipe open at its upper and lower ends is centrally arranged within the tank, the lower end of the pipe extending through the bottom of the tank to define a water outlet. A plurality of normally closed, temperature responsive valves are connected with the pipe in vertically spaced relation. Each of the valves is operable when the water adjacent thereto has a predetermined temperature to deliver that water to the pipe, whereby the water at the outlet will have the predetermined temperature.