Open railroad car

Claim 1

IN AN OPEN RAILROAD FREIGHT CAR: A CAR BOX HAVING A FLAT BOTTOM AND COMPRISING TWO BOX SECTIONS TILTABLE TOWARD THE CENTRAL PORTION OF SAID CAR AND ABOUT AN AXIS TRANSVERSE TO THE LONGITUDINAL AXIS THEREOF FOR RECEIVING GOODS TO BE TRANSPORTED, AN UNDERSTRUCTURE SUPPORTING SAID CAR BOX AND HAVING AN OPENING AT LEAST APPROXIMATELY IN THE MIDDLE PORTION OF THE BOTTOM OF SAID UNDERSTRUCTURE, SHAFT MEANS SUPPORTED BY SAID CAR AND TILTABLY SUPPORTING SAID BOX SECTIONS FOR SELECTIVE TILTING MOVEMENT OF SAID BOX SECTIONS ABOUT SAID SHAFT MEANS FROM A SUBSTANTIALLY HORIZONTAL LOADING POSITION INTO A TILTED POSITION FOR RELEASING GOODS FROM SAID BOX SECTIONS THROUGH SAID OPENING, A CENTRAL WALL SECTION FIXED TO SAID UNDERSTRUCTURE ON AT LEAST ONE SIDE AND SLIDABLY ENGAGING THE SIDES OF SAID BOX SECTIONS AT THE INNER ENDS OF THE BOX SECTIONS, AND DOOR MEANS PIVOTALLY MOUNTED IN SAID WALL SECTION, THE INNER ENDS OF SAID BOX SECTIONS BEING SPACED SO OPENING OF THE DOOR MEANS WILL GIVE ACCESS TO THE SPACE BETWEEN THE INNER ENDS OF THE BOX SECTIONS.