C.W. Baldwin's hydraulic elevator in 1872 is noted for revolutionizing the industry by using what combination?

C.W. Baldwin's hydraulic elevator in 1872 is significant because it introduced a combination of a short jack assembly, rope, and sheave, which allowed for more efficient lifting and operation compared to previous systems. The short jack assembly facilitated quick and effective movement of the elevator car, while the rope provided a flexible yet strong connection to the drive mechanism. The sheave, a wheel or pulley that supports the rope, enabled smooth guidance and reduced friction, further enhancing the elevator's performance.

This combination was a pivotal development in elevator mechanics, ultimately transforming how elevators were designed and operated, leading to broader adoption and improved safety. The efficiency and innovative mechanics of Baldwin's system laid the foundation for future advancements in the elevator industry, making it a landmark moment in engineering history.