. Nailing Plate 



James 



l-Beam 



Track 



Extension 



Bolt 



Hoist \''.1:iee's 

 Chain (| Macliined 

 Guide| and Keyed to 



Shaft 



Gudgeon 

 support 

 rivetted 

 through 



two 

 thicknesses 



of steel 



Trip Spring 

 Protected 



147 Rivets. 



Machine n^'^"':''' 

 not spot welded. 



Reinforcing Plate 

 Steel 

 4ya'\vide,'/8"thick 



18 Gauge 

 Galvanized 



Steel 



