Abstract: Trailer apparatus or drive unit is disclosed for rotating a drive shaft of a trailer landing gear, lifting gear, dolly, or the like, thereby facilitating the raising and lowering of the legs or supports of the landing gear. The drive unit includes a shaft and gear assembly or gear box having a first shaft with one end adapted to be releasably connected to the drive shaft of the landing gear and with a second end adapted to receive a hand crank handle, a second shaft parallel to the first shaft with one end serving as a rotary support and the other end adapted to receive an output shaft of a rotary motor. A first gear is attached to the first shaft proximate its ends with a plurality of drive teeth meshing with corresponding drive teeth of a second smaller gear attached to the second shaft proximate its ends. A housing surrounds the gears, supports the shafts and includes openings for receiving therethrough the first and second shafts.

Abstract: A monorail vehicular system is provided, which uses an elevated track of multipiece construction, with a central electrically insulated panel having a supporting lower metal rail, which acts as one side of an electrical supply system, and with an upper metal rail on top of the central panel for support, and to provide the other side of the electrical system. The lower rail is supported at intervals by clips, carried on spaced vertical poles which rest on bases on the ground or other supporting surface. A car used in the system rides on wide roller type wheels on top of the upper metal rail, has a resiliently urged collector in contact with the upper rail, and a pair of contacts which engage the lower metal rail, with a pair of horizontal stabilizing wheels extending downwardly from the car on each side of the central panel and in contact with it, and which wheels are unequally spaced from the upper rail.