. Bulletin. Science. Figure 30.âUpperworks and passenger platforms of the Otis system at second level. (From La Nature, Aug. 10, 1889, vol. 17, p. 169.) chines (which he did have faith in) . . and if the others ate up coal in proportions greatly in of ours, he would have it to say . . "Gentlemen, these are my choice of elevators, those are yours &; There was a published interview ... in which Eiffel stated . . that he was to meet some American gentlemen the following day, who were to provide him with elevatorsâgrand elevators, I think he said. . The Roux and the Otis sy
. Bulletin. Science. Figure 30.âUpperworks and passenger platforms of the Otis system at second level. (From La Nature, Aug. 10, 1889, vol. 17, p. 169.) chines (which he did have faith in) . . and if the others ate up coal in proportions greatly in of ours, he would have it to say . . "Gentlemen, these are my choice of elevators, those are yours &; There was a published interview ... in which Eiffel stated . . that he was to meet some American gentlemen the following day, who were to provide him with elevatorsâgrand elevators, I think he said. . The Roux and the Otis systems both drew their â wzXtT supply from the same tanks; also, each system used similar distributing valves () operated from the cars. Although no reports have been found of actual controlled tests comparing the efficiencies of the Otis and Roux systems, a general quantitative comparison may be made from the balance figures given for each (p. 40), where it is seen that 2,665 pounds of excess tractive effort were allowed to over- come the friction of the Otis machinery against 13,856 pounds for the Roux. THE EDOUX SYSTEM The section of the Tower presenting the least diffi- culty to elevator installation was that above the juncture of the four legsâfrom the second platform to the third, or observation, enclosure. There was no question that French equipment could perform this service. The run being perfectly straight and vertical, the only unusual demand upon contemporary elevator technology was the length of riseâ525 feet. The system ultimately selected (fig. 37) appealed to the Commission largely because of a smiliar one that had been installed in one tower of the famous Troca- dero ^' and which had been operating successfully for 10 years. It was the direct plunger system of Leon Edoux, and was, for the time, far more rationally contrived than Backmann's helicoidal system. Edoux, an old schoolmate of Eiffel's, had built thousands of elevators in France and was possi
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