Step platform for an escalator
 A step platform for an escalator having a step chain with a plurality of axles is provided comprising a lower step attached to an axle of the step chain, a higher step, attached to an axle of the step chain, having a middle section, and apparatus for actuating the middle section. The actuating apparatus is operated by the rotation of the step chain axles in the transition zones between the landings and the inclined midsection of the escalator. 
Otis Elevator Company
B
B66B
inventional
Helmut J. W. Hermann W. Klaus Udo
Meyer Ahls Blaseck Schmitting