662 G. New Patents

A power generation system for converting the motion of waves on a body of water such as a lake or sea to drive pumps, electrical generators or the like. A weighted float rides on the waves. A cable and pulley arrangement changes the direction, travel and force of the wave energy ac- tion imparted on the float and drives a hydraulic circuit. The hydraulic circuit includes an ac- cumulator for temporary energy storage and release to assist in maintaining constant flow and pressure of hydraulic fluid to one or more hydraulic motors during each wave cycle. The hydraulic motor drives a load such as an electric generator. An automatically actuated device adjusts for high and low tides.

4434743

S H E L L F I S H M A R I C U L T U R E A P P A R A T U S

William F Nickel

e8 7b ~

4434575

MARINE TRAP SENSING SYSTEM

Arthur Pearson

--~Z ,

62 ~ t = i O r ~

A new and improved marine trap alarm with a sensing system that includes an electrical current producing source such as a battery, a normally open pair of contacts with at least one movable contact to be actuated by an animal entering the trap, and a trap sensing circuit connected to the open contacts. The trap sensing circuit includes a true comparator and a silicon controlled rec- tifier. The true comparator prevents an output when the input does not reach a designed threshold value. The true comparator includes the operational amplifier that has critical dis- crete component values that are engineered to render input current flow bridging the contacts by way of the high saline fluid environment in- operative, thereby eliminating false output signals to an alarm or indicator. When the nor- mally open pair of contacts is closed by the weight of the animal, a differential potential then exists between the inverting and noninverting in- puts of the operational amplifier causing the out- put voltage to rise and trigger the latching circuit to set off the alarm.

A shellfish mariculture apparatus whereto tile apparatus includes a frame, an envelope corn prising a sleeve of open mesh material having a~ upper and lower portion and a series of stanchions operably connected to the frame l:\~r supporting an upper portion of the sleeve and ~ means operably contacting an upper portion of the sleeve for elevating the upper portion of the sleeve above the lower portion thereof above

4435366

M E T H O D A N D A P P A ~ T U S F O R C O N C E N T R A T I O N O F T R A C E

M A T E R I A L F R O M L A R G E W A T E R V O L U M E S

Dieter Heitkamp, Klaus Wagener, Jfederai Republic Of Germana assigned to Kernfor, schungsanlage Julich Gesellschaft mit beschrankter Haftung

5 v a

Method of and apparatus for concentration of trace material from large volumes of water. Car- rier bodies having a lower density than that of water are introduced into a water layer, espe- cially a natural sea current or stream; these c a r rier bodies are collected again after an automatic traversal of the sea flow or water layer under conditions determined by density differing from that of water. The carrier bodies are loaded and charged by depositing or accumulation of trace material, e.g. uranium concentration, on the car- rier bodies. The carrier bodies are then conveyed