Abstract: Maglev propulsion systems commonly employ either synchronous fields with a serpentine winding or a linear induction motor winding. Another alternative is a simpler heliical winding, the current for which is injected via a sliding contact. Long stator machines are forced to excite a lot more track than is required at any time and to place expensive switch gear along the track. Short stator induction machines are forced to perform much of the power handling on the vehicle and to deal with entry drag effects. A brush on the vehicle excites a helix winding on the track and eliminates both problems and uses the same magnetic field employed to get lift and guidance to supply propulsion. Because only a small section of the track is excited at a time, the efficiency is very high.

Abstract: A device for cancer treatment and nerve regeneration that induces a non-symmetrical electric field. This electric field is thought to cause electro-osmotic activity around p53 proteins within the body, in addition to altering the transmembrane potential. Both closed and open magnetic field structures can be used towards this end. With a closed magnetic structure, the field is contained within a toroid or similar structure, and the electrical circuit is completed by placing the toroid in a conducting liquid or gel. Using an open circuit, a cut C core of ferromagnetic material is wound with a figure “8” shaped coil and the field is driven into the body. In both cases, the current driving the coil is preferentially asymmetrical, resulting in an induced E field which is not the same in the first half of the cycle as it is in the second. The induced electric field moves organelles into the nerve tip site through the process of electrokinectics.

Abstract: Transcranial Magnetic Stimulation (TMS) is now a common diagnostic and treatment for many brain dysfunctions. A rapidly changing magnetic field induces an electric field which initiates an action potential. Ferromagnetic cores increase the efficiency of the stimulator unit. Choosing an optimal core size is a task which involves both the physics of fields as well as the physics of biostimulation. Both the inductance and resistance of the stimulator affect the induced transmembrane voltage. A technique is outlined for using a boundary element method to design an optimal stimulation core and an exemplary core devised by such technique is described.

Abstract: Conventional linear induction motors (LIMS) have been used effectively to get linear thrust. These devices are typically short stator, and thus have entry and exit field effects. When a field enters a coil, there is a braking, drag force. A pulsed linear induction motor (PLIM) pulses the coils so that they push off the secondary shorted coils. Among the advantages gained by the use of these devices is no entry drag effect, simpler electronics required to excite the PLIM, and a smaller winding overhang past the steel structure of the PLIM. This invention describes coil arrangements useful for exciting a continuous array of coils, placed end to end, and coils that are overlapped. Control is realized by selecting the number of pulses to apply during the active excitation window.

Abstract: Information is encoded on tags preferably in a form emulating conventional bar coding, in which ferromagnetic strips correspond to bars and nonferromagnetic spaces correspond to the absence of bars. The tags thus can be embedded within an article or otherwise concealed from visual scanning or inspection. The tags are read by scanning with a magnetic reader including an excitation coil and a pickup coil. Relative movement between the tags and the scanner induces a signal in the pickup coil only when a bar is scanned, so that the phase and timing of the induced signals contain information corresponding to the relative placement and width of the ferromagnetic bars and strips. Those signals are processed to provide an output signal emulating the output from a conventional optical bar code scanner.