Abstract: A system for transporting a person on a stretcher between upper and lower platforms connected by a stairway includes a retractable cable source located at the upper level whereby with one end of stretcher attached to the cable, an assistant to grasp the other end of the stretcher and transport the individual up or down the stairway with the cable providing tension to stabilize movement. Multiple stretchers may be located at either or both levels, in which case the retractable cable source provides sufficient tension to assist in pulling the stretcher up the stairway. In the preferred embodiment the retractable cable source includes a housing into which the cable retracts and a loaded spring disposed within the housing. Also in the preferred embodiment, the stretcher is sufficiently flexible to permit turning of the stretcher during transport.

Abstract: The mechanism comprises a rectilinearly movable roller guide which at its upper end can be coupled to the plunger of the fuel pump and in the lower end of which an arm is journalled by means of a pivot pin. The arm supports a follower roller which is held in contact with an actuating cam on the rotating control shaft of the engine. To the arm there is secured a pin engaging in a vertical guideway which can be moved horizontally so as to pivot the arm between two end positions each corresponding to one direction of rotation of the engine. Each end position is defined by the mutual engagement, under the influence of the force acting on the follower roller, between two abutment surfaces provided on the arm and the roller guide, respectively.