Patent ID: 8376622

Claim:
A device for detecting and monitoring damage to races or adjacent regions of bearing rings of anti-friction bearings with an anti-friction bearing chamber and with a bearing circumference, said device being comprised of a measuring device disposed in the anti-friction bearing chamber, said device comprising: a sensor for transmission of measuring signals and a means for supplying sensor measurement data to outside the anti-friction bearing chamber; an energy source disposed in the anti-friction bearing chamber and which comprises a first coil to supply electrical energy required by the measuring device and a second coil disposed outside the anti-friction bearing chamber for inductive transfer of electrical energy to the first coil, the second coil extending only over a part of the bearing circumference and the energy source further comprising an energy accumulator connected to the first coil and said energy accumulator stores electrical energy received via said second coil and said first coil with at least a portion of said first coil is adjacent to at least a portion of said second coil.