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2. Hoist (device) - Wikipedia

   en.wikipedia.org/wiki/Hoist_(device)

   Hoist atop an elevator. A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium.

3. Patented track crane - Wikipedia

   en.wikipedia.org/wiki/Patented_track_crane

   ASME HST-2 - Performance Standard for Hand Chain Manually Operated Chain Hoists; ASME HST-4 - Performance Standard for Overhead Electric Wire Hoists; ASME HST-5 - Performance Standard for Air Chain Hoists; ASME HST-6 - Performance Standard for Air Wire Rope Hoists; ANSI Z535.4 - Product Safety Signs and Labels; NFPA 70 - National Electric Code

4. Engine crane - Wikipedia

   en.wikipedia.org/wiki/Engine_crane

   The electric chain hoist, also known as the "electric hoist", is the least used type of engine crane. The operation is similar to the chain hoist in the way that chains are used to lift the engine. The electric chain hoist uses an electric motor operated by remote control to lift the engine, unlike the chain hoist where the operator has to ...

5. Overhead crane - Wikipedia

   en.wikipedia.org/wiki/Overhead_crane

   The original hoist contained components mated together in what is now called the built-up style hoist. These built up hoists are used for heavy-duty applications such as steel coil handling and for users desiring long life and better durability. They also provide for easier maintenance.

6. Differential pulley - Wikipedia

   en.wikipedia.org/wiki/Differential_pulley

   He claimed that many engineering firms conceded on the difficulty of efficiently disengaging the chain from the teeth as the pulleys turned, but his firm developed a "pitch" chain which solved the issue. Marketed as "Weston Differential Pulley Blocks with Patent Chain Guides", the pulley had good sales, namely, 3000 sets in 9 months.

7. Crane (machine) - Wikipedia

   en.wikipedia.org/wiki/Crane_(machine)

   The advantage of the box girder type configuration results in a system that has a lower deadweight yet a stronger overall system integrity. Also included would be a hoist to lift the items, the bridge, which spans the area covered by the crane, and a trolley to move along the bridge. The most common overhead crane use is in the steel industry.