Abstract: The invention relates to an apparatus for determining the roll angle of a device having a housing, wherein a coil, which is arranged on or in the housing so as to be rigid in relation to the housing of the device, and an actuation electronic system, which generates voltage profiles that are limited chronologically by means of the coil, are provided.

Abstract: The invention relates to an apparatus for location of an instrument or appliance having at least one magnet which produces a magnetic moment at right angles to the appliance shaft and can be rotated independently of the instrument or appliance. This results in a location system which allows precise location at an accurate time, determination of the axis direction and control of an appliance which is being operated in a channel or medium.

Abstract: A capsule is capable of releasing at least one agent that is contained therein by heating at least one heating element under the effect of at least one alternating magnetic field at a defined point in a body, said capsule dissolving when entering in contact with a dissolving liquid. The capsule avoids getting stuck on stenoses while being thermally acceptable and favorable from the point of view of energy. In the capsule, the heating element is at least partially surrounded with a capsule part, material of which is provided with greater thermal resistance than the walls of common capsules used for medicaments.