Abstract: A magnetic stimulation probe is provided to produce a probe electromagnetic field within a patient. The magnetic stimulation probe has a first generally planar magnetic field generating coil having a first coil trace having a decreasing radial spiral which passes about a first central portion, the first coil trace having a first electric current traveling in a first direction and having a first plurality of separated portions each having a first respective set of different radii from the first central portion along a bisecting line. The first planar coil has a second coil trace having a second electric current traveling in a second direction which is parallel to the first direction, and having a second plurality of separated portions each having a second respective set of different radii from the first central portion along the bisecting line along the bisecting line. Two such coils can be arranged to produce a high intensity focused magnetic field at a distance from the probe.

Abstract: A magnetic stimulation probe is provided to produce a probe electromagnetic field within a patient. The magnetic stimulation probe has a first generally planar magnetic field generating coil having a first coil trace having a decreasing radial spiral which passes about a first central portion, the first coil trace having a first electric current traveling in a first direction and having a first plurality of separated portions each having a first respective set of different radii from the first central portion along a bisecting line. The first planar coil has a second coil trace having a second electric current traveling in a second direction which is parallel to the first direction, and having a second plurality of separated portions each having a second respective set of different radii from the first central portion along the bisecting line along the bisecting line. Two such coils can be arranged to produce a high intensity focused magnetic field at a distance from the probe.

Abstract: This invention relates to a homopolar machine. The homopolar machine can be used as a generator or a motor. In one embodiment, the homopolar machine has a conductive shaft which orbits around two stationary co-linear conductive shafts. There are four electrical connection means, two located on the orbiting shaft and one located on each of the stationary shafts. Each of the two electrical connections on the stationary shafts are connected to an electrical connection on the orbiting shaft. In this way, the three shafts are electrically connected. There is also an armature, which in a preferred embodiment is disc shaped, located at least one of the four electrical connections and comprises at least one of the electrical connections. Furthermore, a magnetic flux path mechanically associated with the orbiting shaft intersects the armature. In operation, the orbiting shaft moves around the two stationary shafts.