down due to freezing weather. The electric elevator freezing chemical to the water — and operation was 



had a short life, being removed in 1922 when the placed on a year-round basis. 



number of winter visitors increased far beyond its Today the two Fives-Lilies hydraulic systems remain 



capacity. However, the two hydraulic systems were in full use; and visitors reach the Tower's summit by 



modified to operate in freezing temperatures — pre- Edoux's elevator (fig. 41), which is all that remains 



sumably by the simple expedient of adding an anti- of the original installation. 



Balance of the Three Elevator 



Systems 





The Otis System 









Negative effect 









Weight of cabin: 23,900 Ib.Xsin 78°9' (incline of upper run) 

 Live load: 40 persons (0)150 lb. = 6,000 X sin 78 °9' 



Positive effect 





23, 390 lb. 

 5.872 



— 29, 262 lb. 



^ . , 1^5, oooXsin ti4°3'5' (incline of lower run) 



Counterweight: ^^^ , -^-^ ^^ 



3 (rope gear ratio) 



,,, • , r ■ , , ■ 33, o6oXsin 54°35' 



Weight of piston and chariot: ^ -. — . , '^'"^ 



^ ^ 12 (ratio) 



^ 156 p.s.i.X 1,134 sq. in. (piston area) 

 r ower . /- , ■ ^ 

 12 (ratio) 





14, 940 lb. 



2,245 

 14, 742 



31,927 lb. 



Excess to overcome friction 







2, 665>. 



The Roux, Combaluxjer and Lepape 



System 





Negative effect 









Weight of cabin: i4,iooXsin 54°35' 



Live load: 100 persons (5150 lb. = 15,000 X sin 54 "35' 



Positive effect 





1 1, 500 lb. 



12, 220 



— 23, 720 lb. 





Counterweight: 6,600 X sin 54°35' 



,156 p.s.i.X 2 (pistons) X 1,341.5 sq. in. (piston area) 

 13 (rado) 





5.380 

 32, 196 



37. 576 lb. 



Excess to overcome friction 







13,856 lb. 



The Edoux System 









Negative effect 









Unbalanced weight of plungers (necessary to raise full lower car and 



weight of cables on lower side) 

 Live load: 60 persons (n 150 lb. 



Positive effect 



42, 330 lb. 

 9, 000 



— 51.330 lb. 





Power: 227.5 P-s.i. X 2 (plungers) X 124 sq. in. (plunger area) 



E.xcess to overcome friction 







56, 420 lb. 



5, 090 lb. 



40 BULLETIN 228: CONTRIBUTIONS FROM THE MUSEUM OF HISTORY AND TECHNOLOGY 



U.S. G&VERNMENT PRINTING OFFICE: 1961 



