Mecos Traxler Ag

Richemont International S.a.

Rene Larsonneur

Philipp Buhler

Denis Zimmermann

Philipp BÜHLER

A magnetic bearing device () with an improved vacuum-tight electrical feedthrough through its housing () is disclosed. The feedthrough () comprises a flat connection element () such as a rigid or flexible printed circuit board extending through the wall of the housing (), preferably all the way along an inner circumference of the housing. The connection element is sealed in a gas-tight manner to the housing. The element preferably has a central opening () for receiving the rotor shaft. Connections to the bearing units and sensors may be achieved by flat-ribbon cables () or flexprints. The sensors are preferably also implemented as printed sensors. Thus a very compact and cost-efficient magnetic bearing device can be obtained. An alternative embodiment uses a connection element on a side wall of the housing as a feedthrough to the bearing components.

Magnetic bearing device with an improved vacuum feedthrough

A rotor shaft () for a magnetic bearing device () is disclosed. The shaft comprises an inner portion on whose periphery a plurality of targets () separated by spacers () are mounted. This is achieved exerting an axial pressing force (F, F') to the peripheral parts, rather than applying a radial press fit. In this manner, a simplified construction, a higher stiffness and a higher stability at high rotational speed are achieved. Further disclosed is a rotor having a thrust disk () whose diameter decreases towards the periphery. This allows to use a larger thrust disk at a given rotational speed.

Rotor shaft for a magnetic bearing device

A magnetic bearing device () for rotatably supporting a shaft () for rotation about a rotation axis () is disclosed. The device () comprises a first active radial bearing (), one or more first radial displacement sensors (), and an axial bearing (). At least a part of the axial bearing () is disposed between the first active radial bearing () and the first radial displacement sensors () when viewed in an orthogonal projection onto the rotation axis (). A vacuum pump including the magnetic bearing device () and a multiple-sensing unit () are also disclosed.

Magnetic bearing device and vacuum pump

A lunar phase display mechanism includes an upper disc which is the lunar display disc and a lower disc mounted concentrically to this disc. One of the discs is mounted so that during normal operation of the mechanism that one disc rotates relative to the other disc, and the other disc is mounted in a stationary position during normal operation of the mechanism while this position can be changed by a rotary motion. The gear train driving the rotating disc allows that the direction of rotation of this disc can be reversed so that the different appearance of the lunar phases at the latitudes of the earth and, in particular, in the northern and southern hemisphere can be taken into account in the display.

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Winterthur, Switzerland

Rene Larsonneur