Ship's hatch covers comprising two sections foldably connected to each other

Claim 1

IN A SHIP HAVING A DECK WITH A HATCH OPENING THEREIN, A COAMING SURROUNDING SAID HATCH OPENING AND A SECTIONAL HATCH COVER ADAPTED TO CO-OPERATE WITH SAID COAMING, SAID COVER COMPRISING A PRIMARY SECTION SWINGABLY MOUNTED IN RELATION TO ONE END OF THE COAMING AND A SECONDARY SECTION FOLDABLY CONNECTED TO THE PRIMARY ONE, A MANEUVERING APPARATUS CARRIED BY THE SECTIONS AND WORKING THEREON FOR OBTAINING OPENING AND CLOSING MOVEMENTS, A FIRST SET OF TRACKS EXTENDING ALONG THE SIDES OF THE COAMING, WHEELS AT THE OUTER ENDS OF SAID SECONDARY SECTION ADAPTED TO RUN ON SAID FIRST SET OF TRACKS, SLIDEABLE CARRYING MEMBERS AT THE SWINGING SIDE OF THE PRIMARY SECTION, A SECOND SET OF TRACKS OUTSIDE OF THE CORRESPONDING SIDE OF THE COAMING SAID SLIDABLE CARRYING MEMBERS BEING ADAPTED TO RUN ON SAID SECOND SET OF TRACKS, AND BEING ARRANGED MAINLY AT THE SAME LEVEL AS THE TRACKS AND BEING ARRANGED MAINLY AT THE SAME LEVEL AS THE TRACKS AND HAVING A LENGTH CORRESPONDING TO THE DEPTH OF THE SECTIONS WHEN FOLDED TOGETHER, THE PRIMARY SECTION BEING FURTHER PROVIDED WITH BARS REACHING OUTSIDE SAID CARRYING MEMBERS AND HAVING TRUNNION PINS AT THEIR ENDS FOR CO-OPERATION WITH FIXED GUIDING SLOTS BELOW SAID SECOND SET OF TRACKS, THE RELATIVE SHAPE AND POSITION OF SAID SECOND SET OF TRACKS AND SAID SLOTS BEING SUCH, THAT THE MEMBERS ARE PUSHED OUTWARDS FROM THE COAMING, OVER A DISTANCE CORRESPONDING TO SAID FOLDED DEPTH OF THE SECTIONS, UPON AN UPWARDLY TILTING MOVEMENT OF THE PRIMARY SECTION, AND VICE VERSA.