Ventilating system for bulk carriers

Claim 1

IN A BULK CARRIER, AN ENCLOSURE PROVIDED WITH A TOP AND A PAIR OF OPPOSED END MEMBERS EACH HAVING AN OPENING THERETHROUGH, SAID ENCLOSURE BEING ADAPTED TO CONTAIN THEREIN A BULK MATERIAL HAVING AN UPPERMOST LEVEL SPACED FROM SAID TOP AND BELOW SAID OPENINGS; MEANS ON SAID MEMBERS AT THE OPENINGS IN THE LATTER FOR INTERCOMMUNICATING THE SPACE BETWEEN THE TOP AND SAID UPPERMOST LEVEL WITH THE ATMOSPHERE SURROUNDING THE ENCLOSURE; SAID INTERCOMMUNICATING MEANS ON EACH OF SAID MEMBERS INCLUDING AN L-SHAPED DUCT HAVING A FIRST TUBULAR SECTION MOUNTED ON THE CORRESPONDING MEMBER AND A SECOND TUBULAR SECTION CONNECTED TO THE FIRST SECTION AND DEPENDING THEREFROM IN SPACED RELATIONSHIP TO THE RESPECTIVE MEMBER, SAID FIRST SECTION HAVING AN OPEN END COMMUNICATING WITH THE OPENING IN THE MEMBER AND SAID SECOND SECTION HAVING AN OPENING THEREIN SAPCED FROM THE CONNECTION THEREOF WITH SAID FIRST SECTION; AND MEANS RESPONSIVE TO MOVEMENTS OF ATMOSPHERIC AIR RELATIVE TO THE ENCLOSURE FOR PROVIDING AN AIR PRESSURE DIFFERENTIAL BETWEEN THE OPENINGS IN SAID MEMBERS, SAID LAST MENTIONED MEANS COMPRISING AN OPEN TOP, HOLLOW ELEMENT, SECURED TO THE SECOND SECTION OF THE DUCT ON ONE OF SAID MEMBERS AND IN COMMUNICATION WITH THE OPENING IN SAID SECOND SECTION AND A TURBINE VENT MOUNTED ON SAID ELEMENT AND IN COMMUNICATION WITH THE OPENING IN THE TOP THEREOF.