9 u2032 is accomplished by reversing the travel of operating beam 36 the device of the present invention can be used in both new car construction and also in retrofitting existing cars for cars having transverse doors preferably one mechanism is used for each door as at least one door opens in the opposite direction as shown in fig 1 the reversing mechanism taught in this invention will be used for doors which operate in reverse 0036 fig9 shows an air cylinder which can operate the mechanism of the present invention when it is not possible to directly couple the cylinder to the actuating beam referring now to fig9 a cylinder 8 is coupled to actuating beam 36 by a lever 200 lever 200 is fixed for rotation about a pivot 202 when cylinder 8 is activated lever 200 turns about pivot 202 in a clockwise direction causing beam 36 to travel in the direction shown by arrow a using this mechanism cylinder 8 can be mounted on either end of car 2 as actuating beam 36 can be made to travel in either direction by using either direct coupling or lever 200 in the above description and in the claims which follow the use of such words as u201c clockwise u201d u201c counterclockwise u201d u201c distal u201d u201c proximal u201d.