How an Elevator Goes Up and Down. There are two kinds of elevators today. the hydraulic, which is worked by water, and the electric, which is worked by electricity. The picture here shows the principle of the hydraulic elevator in a simple form. A strong pole, called a plunger rod, is attached to the cage in which we sit, and it works up and down in a cylinder of water. When the elevator is down, the man, by pulling a rope, lowers a plug, which allows water at high pressure to rush into the cylinder, and the pressure of this water raises the plunger rod and pushes up the cage.
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How an Elevator Goes Up and Down. There are two kinds of elevators today. the hydraulic, which is worked by water, and the electric, which is worked by electricity. The picture here shows the principle of the hydraulic elevator in a simple form. A strong pole, called a plunger rod, is attached to the cage in which we sit, and it works up and down in a cylinder of water. When the elevator is down, the man, by pulling a rope, lowers a plug, which allows water at high pressure to rush into the cylinder, and the pressure of this water raises the plunger rod and pushes up the cage.

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Photo12/Universal Images Group/Ivy Close Images

Notre référence

UMG25A06_063

Licence

Droits gérés

Format disponible

46,1Mo (4,0Mo) / 26,8cm x 43,2cm / 3160 x 5100 (300dpi)

Mots clés

20th century elevator works elevators hydraulics electric elevator industrial revolution diagram hydraulic elevator otis

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