Reversible heat engines

Claim 1

IN A HEAT ENGINE USING A MIXTURE OF GASES AS THE WORKING SUBSTANCE, THE COMBINATION COMPRISING, A ROTOR HAVING A HUB AND A PLURALITY OF SUBSTANTIALLY EQUALLY SPACED VANES FIXED TO SAID HUB AND EXTENDING RADIALLY OUT THEREFROM; A ROTOR HOUSING HAVING IN CONSECUTIVE ORDER A CLOSED FIRST SECTOR PORTION, AN OPEN SECOND SECTOR PORTION, A CLOSED THIRD SECTOR PORTION, AND AN OPEN FOURTH SECTOR PORTION WHICH IS DISPOSED TO RECEIVE GAS FROM AMBIENT SPACE AND DISCHARGE GAS TO AMBIENT SPACE, SAID ROTOR HOUSING BEING SO DISPOSED AROUND SAID ROTOR AS TO BE IN CLOSE PROXIMITY TO ALL OF THE PERIPHERAL EDGES OF SAID PLURALITY OF VANES AS THEY IN OPERATION ROTATE INTO SAID CLOSED FIRST SECTOR PORTION AND INTO SAID CLOSED THIRD SECTOR PORTION TO THUS SUCCESSIVELY ENCLOSE INCOMING INTERVANE COMPARTMENTS IN SAID CLOSED FIRST SECTOR PORTION AND SUCCESSIVELY ENCLOSE OUTGOING INTERVANE COMPARTMENTS IN SAID CLOSED THIRD SECTOR PORTION; A FIRST PORT IN SAID CLOSED FIRST SECTOR PORTION OF SAID ROTOR HOUSING IN SUCCESSIVE COMMUNICATION WITH SAID INCOMING INTERVANE COMPARTMENTS; A SECOND PORT IN SAID CLOSED THIRD SECTOR PORTION OF SAID ROTOR HOUSING IN SUCCESSIVE COMMUNICATION WITH SAID OUTGOING INTERVANE COMPARTMENTS; AN INTERCONNECTING MEMBER HAVING A STREAMLINED CONSTRICTION IN THE MIDSECTION SO FORMED TO DEFINE A VENTURI PRESSURE INVERTER PASSAGEWAY, ONE END OF SAID INTERCONNECTING MEMBER BEING CONNECTED TO SAID HOUSING SO AS TO BE IN COMMUNICATION WITH SAID FIRST PORT AND THE OTHER END OF SAID INTERCONNECTING MEMBER BEING CONNECTED TO SAID HOUSING SO AS TO BE IN COMMUNICATION WITH SAID SECOND