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This
was theorized sometime in the mid-17th century yet it's capability of advancing and
explaining technology was not fully accredited until the 19th century when hydraulic
elevators were first introduced. Hydraulic elevators were used between 1857 and 1889.
Operated by means of a vertical plunger, this elevator traveled up and down a cylinder
pushing and lowering the car above it...
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The vertical plunger was reallocated by liquid
under pressure. A hand-driven pump (hydraulic jack) created this pressure. The basic
idea behind any hydraulic system is extraordinarily simple. Any force that is applied at one
point is moved to another point using an ?incompressible fluid' (either oil or water) while
the force is frequently multiplied in the process...
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