Electric drive for hoisting and boom-lifting drums.
US1181323A
Drum, shaft, and winch for hoisters.
US1181321A
Clutch-shifter for overhung winches.
US1034806A
Dumping appliance for hoister-buckets.
US1043441A
Duplex steam hoisting-engine and boiler.
US1077413A
Clutch-operating mechanism.
US967203A
Derrick pivot connection.
US967202A
Winch attachment for stationary hoister-shafts.
US938772A
Duplex thrust device for friction-clutches.
US948281A
Semi-portable hoisting and conveying apparatus.
US978312A
Hoisting and conveying apparatus.
CA112928A
Hoist mechanism
US915363A
Skip or load-carrier.
US913901A
Duplex gearing for hoisting-drums.
US913900A
Reverse-gear for hoisting-machines and analogous uses.
US890073A
Fall-rope carrier.
US890663A
Fall-rope carrier.
US890072A
Fall-rope carrier.
GB190627078A
Improvements in Automatic Skips or Load Carriers for Filling, Hoisting, Removing and Discharging Earth, Coal, or other Materials, and in the Method of Operating such Skips.