Abstract: Automobiles parking method and apparatus comprising a multi storied building with an inclined hoist way located diagonally along the vertical profile linking all parking floors in order to park and retrieve automobiles carried by the elevator lifted along rails situated in the inclined hoist way by means of over head traction cables powered by motor. During parking process automobile is driven in to horizontally positioned platform of the elevator brought down to loading station, so that the elevator is moved along rails on wheels by overhead traction cables to desired parking floor for automobile to drive in to desired parking place and vice versa.

Abstract: A mechanical assembly applicable to convert bidirectional motion of an input shaft into unidirectional motion of an output shaft comprising input shaft, intermediate shaft and output shaft, wherein two sets of gearing arranged one after the other, in combination with ratchet and pawl mechanisms driven in opposite directions, with two opposing ratchet wheels fitted to input shaft, each accompanied by a gearwheel driven on bearings on the same shaft with protruded flanges integral to aforesaid gear wheel, carrying spring loaded pawls on flanges to engage with accompanied ratchet wheel. The output shaft is coupled to input shaft by aforesaid gearings, so that the rotary movement performed either on clock wise or counterclockwise direction on input shaft will result unidirectional motion on output shaft.