Abstract: A hanger bar assembly for sliding doors used in transit cars has at least two separate coaxially oriented, preferably tubular bearing segments which can slidingly engage a cylindrical rod secured above an entry portal of a transit car. Each bearing segment contains bearing means such as a ball bushing bearing. The tubular bearing segments can be secured to a hanger bar at selected locations, taking into consideration such factors as the location of door hanger support points above an entry portal of the transit car, the location where the sliding door interfaces with an adjacent sliding door, the horizontal width of the door, and the distance that the door must travel along the cylindrical rod. Each of the bearing segments can be sealed at either end to reduce the likelihood of dirt and other contaminants entering the bearing segments.

Abstract: A hanger bar assembly for sliding doors used in transit cars has at least two separate coaxially oriented, preferably tubular bearing segments which can slidingly engage a cylindrical rod secured above an entry portal of a transit car. Each bearing segment contains bearing means such as a ball bushing bearing. The tubular bearing segments can be secured to a hanger bar at selected locations, taking into consideration such factors as the location of door hanger support points above an entry portal of the transit car, the location where the sliding door interfaces with an adjacent sliding door, the horizontal width of the door, and the distance that the door must travel along the cylindrical rod. Each of the bearing segments can be sealed at either end to reduce the likelihood of dirt and other contaminants entering the bearing segments.

Abstract: A method for manufacturing patterned tread plates including the steps of providing a press having a path for advancing a sheet therethrough, the press being equipped with a progressive die including a plurality of gaggable dies and punches arranged in a plurality of rows in the path to sequentially engage the sheet when the same is being advanced therethrough in the path, operably associating with the press a CPU having a large capacity secondary data storage device, introducing a multiplicity of codes into the secondary data storage device with each code corresponding to a different tread pattern, some of the codes including gagging instructions for the operation of the dies and punches, selecting a first set of codes and operating the CPU to control the press so as to optionally produce a predetermined number of tread plates according to the first set of codes, and thereafter selecting a second set of codes and operating the CPU to produce a predetermined number of tread plates having a different pattern th