Patent ID: 8360211

Claim:
A hoisting machine, comprising: a rotating part comprising a drive sheave rotatably mounted on a body part of the hoisting machine; a drive-sheave protection plate, wherein the drive-sheave protection plate is secured to the body part of the hoisting machine and extends to a side of the drive sheave, so that the drive sheave is housed in a space remaining between the protection plate and the body part; and a measuring arrangement comprising: a magnetic band, magnetic property of said magnetic band being implemented that the magnetic property varies in a longitudinal direction of the band, wherein the magnetic band is attached to the rotating part, so that the magnetic band is fitted to revolve about a rotational axis of the rotating part, and a reader which senses the magnetic property varying in the longitudinal direction of the magnetic band, said reader being mounted on the drive-sheave protection plate in the immediate vicinity of the magnetic band.