Brake, in particular for a drive of a hoist

A hoist, comprising

• a motor driven lifting mechanism;
• and
• a brake including
• an electrically conducting brake disk rotating about a rotation axis;
• magnetic means including a first pair of magnetic poles, positioned on both sides of the brake disk and defining a magnetic north and a magnetic south, for establishing a first magnetic field directed transversely to the brake disk and acting, at least temporarily, on a portion of the brake disk, said magnetic field having an orientation which depends on a rotation direction of the brake disk and generating a reactive force which retards the movement of the brake disk and is dependent on the rotation speed of the brake disk as well as a radial distance from the rotation axis;
• a constraining mechanism for guiding the magnetic poles along a predetermined path;
• and
• an elastic member, said magnetic poles being movable by the reactive force, in opposition to a return force applied by the elastic member, from a rest position along the predetermined path in rotation direction of the brake disk, wherein the radial distance is preset during movement along the path by a desired course of the rotation direction dependent and rotational speed dependent braking force and adjustable by the return force of the elastic member,
• wherein the constraining mechanism includes a swivel member which is configured to swing about a pivot axis, oriented in parallel relation to the rotation axis, and to sweep over the rotation axis, wherein the swivel member extends across one side of the brake disk and terminates in a U-shaped portion which embraces the brake disk,
• wherein the magnetic poles of the first pair of magnetic poles is located on the U-shaped portion of the swivel member in confronting relationship on either side of the brake disk.