Example levitating meter apparatus are disclosed. An example metering system includes a meter having a display to present indicia associated with a panelist. The meter has a microphone to receive audio output from a media device and circuitry to perform media monitoring. A base includes a cavity to receive at least a portion of the meter. The meter to magnetically levitate relative to the base to decouple the meter from the base. The base and the meter structured to fix a rotational position of the meter relative to the base when the at least the portion of the meter is received by the cavity of the base and the meter levitates relative to the base.

Example levitating meter apparatus are disclosed. An example metering system includes a meter having a display to present indicia associated with a panelist. The meter has a microphone to receive audio output from a media device and circuitry to perform media monitoring. A base includes a cavity to receive at least a portion of the meter. The meter to magnetically levitate relative to the base to decouple the meter from the base. The base and the meter structured to fix a rotational position of the meter relative to the base when the at least the portion of the meter is received by the cavity of the base and the meter levitates relative to the base.

Systems and methods of threading a metal substrate on a rolling mill include receiving a coil of the metal substrate. The method also includes uncoiling the metal substrate from the coil while the coil and guiding the metal substrate to a work stand of the rolling mill with a threading system.

A magnetically levitated arrangement for contactless movement over a surface comprising a magnetizable reaction surface and a magnetically levitated unit arranged to interact with the reaction surface. The levitated unit has at least one pair of rotatable rotary magnet units, each unit rotatable about a rotation axis and having magnetic elements arranged with alternating poles and respectively substantially parallel to the rotation axis in a pole connection direction. Each rotary unit pair is formed to interact, due to rotation of the two rotary units in opposite directions relative to one another and relative to the reaction surface, in such a way with the reaction surface, that forces are generated holding the levitated unit at a distance from the reaction surface, and due to the opposite rotation directions of the rotary units of each pair, a directed drive force moving the levitated unit relative to the reaction surface is generated.

A magnetically levitated arrangement for contactless movement over a surface comprising a magnetizable reaction surface and a magnetically levitated unit arranged to interact with the reaction surface. The levitated unit has at least one pair of rotatable rotary magnet units, each unit rotatable about a rotation axis and having magnetic elements arranged with alternating poles and respectively substantially parallel to the rotation axis in a pole connection direction. Each rotary unit pair is formed to interact, due to rotation of the two rotary units in opposite directions relative to one another and relative to the reaction surface, in such a way with the reaction surface, that forces are generated holding the levitated unit at a distance from the reaction surface, and due to the opposite rotation directions of the rotary units of each pair, a directed drive force moving the levitated unit relative to the reaction surface is generated.

Disclosed are a magnetic levitation device and a linear motion mechanism thereof. The magnetic levitation device is provided with a base and a levitation body, the base comprises a first magnetic assembly, the levitation body comprises a second magnetic assembly, and the first magnetic assembly and the second magnetic assembly are configured to be capable of providing a magnetic balance force required when the levitation body stably levitates relative to the base. The linear motion mechanism is arranged in the base, and comprises: a threaded column installed in a non-displaceable manner relative to the base, wherein at least one part of the threaded column in the length direction of the threaded column is provided with threads; and a displacement support used for supporting the first magnetic assembly of the base, wherein the displacement support is provided with a threaded portion matching the threads of the threaded column, such that when the threaded portion of the displacement support rotates relative to the threaded column, the displacement support generates a corresponding displacement in the length direction of the threaded column. According to the magnetic levitation device, due to the fact that the linear motion mechanism that is simple in structure and reasonable in space layout is used in the base, the whole base is more compact and more reliable in performance.

Disclosed are a magnetic levitation device and a linear motion mechanism thereof. The magnetic levitation device is provided with a base and a levitation body, the base comprises a first magnetic assembly, the levitation body comprises a second magnetic assembly, and the first magnetic assembly and the second magnetic assembly are configured to be capable of providing a magnetic balance force required when the levitation body stably levitates relative to the base. The linear motion mechanism is arranged in the base, and comprises: a threaded column installed in a non-displaceable manner relative to the base, wherein at least one part of the threaded column in the length direction of the threaded column is provided with threads; and a displacement support used for supporting the first magnetic assembly of the base, wherein the displacement support is provided with a threaded portion matching the threads of the threaded column, such that when the threaded portion of the displacement support rotates relative to the threaded column, the displacement support generates a corresponding displacement in the length direction of the threaded column. According to the magnetic levitation device, due to the fact that the linear motion mechanism that is simple in structure and reasonable in space layout is used in the base, the whole base is more compact and more reliable in performance.

A passive magnetic constant-force apparatus comprises a geometry and arrangement of permanent magnets, ferromagnetic components, and non-magnetic structural components. The apparatus is easily and precisely adjustable, cost-effective, with a high load capacity, and with minimal parasitic forces. The apparatus is suitable for use as a counterbalance for vertical linear motion applications and may be integrated with or attached to a linear motion stage.

Embodiments of the invention relate generally to directed self-assembly (DSA) and, more particularly, to the DSA of electronic components using diamagnetic levitation.

Embodiments of the invention relate generally to directed self-assembly (DSA) and, more particularly, to the DSA of electronic components using diamagnetic levitation.