Smithsonian Report, 1910. — Beyer. 



Plate 4. 



1. Electric Traveling Crane Bought About Ten Years Ago. 



This slums open gearing, overhung gears, exposed couplings, etc. The foot walk on which the 

 men are standing was placed on the crane after it had Keen installed. 



2. Another Crane View, Showing What Can be Done in the Way of Protecting 



Gears. 



It is practically impossible for any one to be caught in the gearing of this crane, or for any of the 



parts to work, loose or drop. 



