Hopper car door lock

Claim 1

IN A HOPPER STRUCTURE FOR A RAILWAY HOPPER CAR, THE STRUCTURE HAVING AN OUTLET OPENING AND A DOOR PIVOTED AT ITS UPPER EDGE TO THE STRUCTURE AND POSITIONED TO CLOSE THE OPENING; THE COMBINATION THEREWITH OF A DOOR LOCKING MECHANISM COMPRISING, A BEARING BRACKET SECURED TO THE HOPPER STRUCTURE, SAID BRACKET BEING FORMED WITH AN OPENING THEREIN HAVING A GENERALLY CYLINDRICAL PORTION AND AN ELONGATED SLOT PORTION TANGENTIAL THERETO, A BAR SOCKET AND OPERATOR HAVING A BEARING PORTION JOURNALED IN SAID CYLINDRICAL PORTION OF SAID BRACKET AND HAVING A LOCKING SURFACE ADJACENT SAID BEARING PORTION, A LOCKING LEVER HAVING A STUD ROTATABLE AND SLIDABLE IN SAID ELONGATED BEARING SLOT PORTION AND HAVING A CAMMING SURFACE ENGAGEABLE WITH SAID LOCKING SURFACE, MEANS FOR MANUALLY ROTATING SAID LOCKING LEVER SO THAT ITS CAMMING SURFACE IS DISENGAGED FROM SAID LOCKING SURFACE TO PERMIT MANUAL MANIPULATION OF SAID BAR SOCKET AND OPERATOR, AN ECCENTRIC NONROTATABLY CONNECTED TO SAID BAR SOCKET AND OPERATOR FOR ROTATION THEREWITH AND HAVING A BEARING SURFACE RADIALLY OFFSET FROM ITS AXIS OF ROTATION, A LATCH JOURNALED ON SAID OFFSET BEARING SURFACE, SAID LATCH HAVING FIRST AND SECOND ARMS EXTENDING AWAY FROM SAID BEARING SURFACE, SAID FIRST LATCH ARM BEING SHAPED TO ENGAGE THE DISTAL EDGE OF THE DOOR TO HOLD IT IN PARTLY AND FULLY CLOSED POSITIONS AND TO RELEASE IT TO FULLY OPEN POSITION, SAID SECOND ARM MOUNTING A COUNTER WEIGHT, AND SAID ECCENTRIC HAVING A LEVER ARM ROTATABLE THEREWITH, SPACED LATERALLY OF SAID LATCH AND PROJECTING OVER SAID LATCH AND ENGAGABLE WITH THE SURFACES OF SAID FIRST AND SECOND ARMS UPON ROTATION OF SAID ECCENTRIC SO AS TO ROTATE SAID LATCH ABOUT SAID OFFSET BEARING SURFACE, WHEREBY MANIPULATION OF SAID BAR SOCKET AND OPERATOR IN UNLOCKED CONDITION WILL EFFECT ACTUATION OF SAID LATCH.