Water cooling and aerating device for fish tanks and the like

Claim 1

IN A COOLING AND AERATING DEVICE FOR FISH TANKS AND THE LIKE HAVING A GENERALLY PREDETERMINED WATER LINE: A SUPPORT PLATE ADAPTED TO BE SUPPORTED ADJACENT THE TOP OF THE TANK ABOVE THE WATER LINE IN THE TANK, A VERTICAL TUBE HAVING AN UPPER OPEN END, SAID VERTICAL TUBE BEING SPACED FROM SAID SUPPORT PLATE WITH THE UPPER OPEN END OF SAID TUBE TERMINATING GENERALLY IN THE REGION OF THE WATER LINE OF THE TANK, A MOTOR HAVING A VERTICAL SHAFT SUPPORTED GENERALLY COAXIALLY OF SAID VERTICAL TUBE, A PROPELLER SUPPORTED BY SAID SHAFT INSIDE SAID VERTICAL TUBE FOR MOVING WATER VERTICALLY THROUGH SAID TUBE, A COOLING COIL POSITIONED INSIDE SAID TUBE ABOVE SAID PROPELLER IN SUCH POSITION THAT WATER PROPELLED BY SAID PROPELLER FLOWS OVER SAID COOLING COIL, MEANS AT THE UPPER END OF SAID VERTICAL TUBE FOR INTRODUCING AIR INTO WATER FLOWING OUT OF THE TOP OF SAID TUBE, A TOP FILTER PLATE MEMBER HAVING AN OPENING THERETHROUGH THROUGH WHICH WATER TO SAID VERTICAL TUBE PASSES, A BOTTOM FILTER PLATE MEMBER SPACED BENEATH SAID TOP FILTER PLATE MEMBER, A POROUS RETAINER EXTENDING VERTICALLY BETWEEN SAID FILTER PLATES AND SURROUNDING SAID OPENING IN SAID TOP PLATE, A VERTICALLY EXTENDING FILTER POSITIONED