Cartesian type toy

Claim 2

A SUBMERSIBLE ELEMENT FOR A CARTESIAN TOY COMPRISING AN OPEN ELONGATED FRAME, SAID FRAME INCLUDING A PAIR OF LATERALLY-SPACED AND SUBSTANTIALLY PARALLEL SIDE FRAME MEMBERS, A PAIR OF LONGITUDINALLY-SPACED END FRAME MEMBERS, EACH OF SAID END FRAME MEMBERS CONNECTING, RESPECTIVELY, AN ADJACENT PAIR OF ENDS OF SAID SIDE FRAME MEMBERS, AN OGIVE FRONT FRAME MEMBER HAVING ITS ENDS CONNECTED, RESPECTIVELY, WITH AN ADJACENT PAIR OF ENDS OF SAID END FRAME MEMBERS, A SUBSTANTIALLY HOLLOW RIGID RECEPTACLE HAVING A PAIR OF OPPOSITELY-DISPOSED OPEN AND CLOSED ENDS, A RIGID CLOSURE WALL EXTENDING ACROSS AND CLOSING SAID OPEN END OF SAID RECEPTACLE, A FLEXIBLE DIAPHRAM EXTENDING ACROSS SAID RECEPTACLE, A FLEXIBLE DIAPHRAGM EXTENDING SURE WALL AND DIVIDING SAID RECEPTACLE INTO A PAIR OF AIRCONTAINING AND LIQUID-RECEIVING CHAMBERS, SAID CLOSURE WALL HAVING A PORT EXTENDING TRANSVERSELY THERETHROUGH, MEANS SUPPORTING SAID RECEPTACLE FOR ROTATION ON SAID FRAME, SAID MEANS COMPRISING A STUB SHAFT HAVING ONE OF ITS ENDS FIXEDLY-SECURED TO SAID CLOSED END OF SAID RECEPTACLE FOR ROTATION THEREWITH, THE OTHER END OF SAID STUB SHAFT BEING JOURNALED FOR ROTATION ON SAID OGIVE FRONT FRAME MEMBER CENTRALLY OF THE ENDS THEREOF AND AN ELONGATED SHAFT HAVING ONE OF ITS ENDS FIXEDLY-SECURED TO SAID CLOSURE WALL CENTRALLY THEREOF FOR ROTATION WITH SAID RECEPTACLE, THE OTHER END OF SAID SHAFT EXTENDING TRANSVERSELY THROUGH THE SIDE FRAME MEMBER ADJACENT SAID OGIVE FRAME MEMBER CENTRALLY OF SAID ENDS THEREOF AND BEING JOURNALED FOR ROTATION THEREIN, SAID OTHER END OF SAID SHAFT HAVING AN END PORTION DISPOSED BETWEEN SAID SIDE FRAME MEMBERS, A PROPELLER FIXEDLY-SECURED ON SAID END PORTION OF SAID SHAFT BETWEEN SAID SIDE FRAME MEMBERS, A LIQUID PRESSURE-RESPONSIVE FLAP VALVE DISPOSED IN SAID LIQUID-RECEIVING CHAMBER AND HAVING A PAIR OF OPPOSED ENDS, MEANS FIXEDLY-SECURING ONE OF SAID ENDS OF SAID FLAP VALVE TO SAID FIXEDLYCONNECTED END OF SAID SHAFT WITH ITS OTHER END NORMALLY EXTENDING ACROSS AND CLOSING SAID PORT AGAINST ENTRY OF SAID LIQUID INTO SAID LIQUID-RECEIVING CHAMBER, AND AN L-SHAPED CONDUIT HAVING AN END THEREOF EXTENDING TRANSVERSELY THROUGH SAID CLOSURE WALL AND IN OPEN COMMUNICATION WITH SAID LIQUID-RECEIVING CHAMBER, THE OTHER END OF SAID CONDUIT TERMINATING ADJACENT THE PERIPHERAL EDGE OF SAID CLOSURE WALL.