The drawing below is from Gustave Eiffel's book describing the tower that bears his name. There are 53 of them in total.
XLI. Ascenseur Fives-Lille - Appareil funiculaire
XLI. Lift Fives-Lille - Funicular device
The elevator Fives-Lille is very largely described in these boards, there are many elements to describe. This plate presents the funicular apparatus, with great precisions in the ribs.
See also: