1. IN A RAILWAY CAR, A ROOF HAVING AN ELONGATE HATCH OPENING, AN ELONGATE HATCH COVER NORMALLY SEATED OVER THE HATCH OPENING FOR COVERING THE OPENING, A GENERALLY VERTICALLY EXTENDING MEMBER ADJACENT EACH END OF THE ELONGATE HATCH COVER ON WHICH THE HATCH COVER IS MOUNTED FOR UP AND DOWN MOVEMENT RELATIVE TO THE HATCH OPENING, MEANS OPERATIVELY CONNECTED TO EACH VERTICALLY EXTENDING MEMBER TO RAISE AND LOWER THE HATCH COVER, AND A PAIR OF GENERALLY HORIZONTALLY EXTENDING ARMS BENEATH THE HATCH COVER FOR SUPPORTING EACH VERTICAL MEMBER, SAID ARMS HAVING INNER ENDS PIVOTALLY CONNECTED TO THE ASSOCIATED VERTICAL MEMBER AND OUTER ENDS MOUNTED FOR BACK AND FORTH MOVEMENT, THE ARMS ADAPTED TO MOVE IN A TOGGLE ACTION FROM ONE SIDE OF A DEAD CENTER POSITION TO THE OTHER SIDE THEREOF FOR OPENING AND SUBSEQUENTLY CLOSING THE HATCH COVER, THE ARMS BEING GENERALLY PARALLEL WHEN IN THE DEAD CENTER POSITION.