Block and tackle
device · 250 BC · Ancient world
A system of pulleys that multiplies force.
What it is made of
- Pulley — has part. A block and tackle is several pulleys and a rope.
- Rope — has part. The rope runs around the pulleys.
Where it is used
- Crane (ancient) — is part of. The crane lifted loads with a block and tackle.
- Tower crane — is part of. The load is lifted with a block and tackle.
- Drilling rig — is part of. The block and tackle lifts the drill string.
- Pile driver — is part of. Lifting the weight.
- Overhead crane — is part of. A block and tackle.