a block diagram showing the interconnection of the components of the apparatus of theinvention;FIG. 2 is a block diagram showing signal flow in one embodiment of the apparatus.DESCRIPTION OF THE PREFERRED EMBODIMENTReferring to the drawings, specifically FIG. 1, a high frequency transmitter 2 produces and supplies twoelectromagnetic wave signals through suitable coupling means 14 to an antenna 4. The signals are directedby the antenna 4 to the skull 6 of the subject 8 being examined. The two signals from the antenna 4, whichtravel independently, penetrate the skull 6 and impinge upon the tissue of the brain 10.Within the tissue of the brain 10, the signals combine, much in the manner of a conventional mixingprocess technique, with each section of the brain having a different modulating action. The resultingwaveform of the two signals has its greatest amplitude when the two signals are in phase and thusreinforcing one another. When the signals are exactly 180.degree. out of phase the combination producesa resultant waveform of minimum amplitude. If the amplitudes of the two signals transmitted to thesubject are maintained at identical levels, the resultant interference waveform, absent influences of external radiation, may be expected to assume zero intensity when maximum interference occurs, thenumber of such points being equal to the difference in frequencies of the incident signals. However,interference by radiation from electrical activity within the brain 10 causes the waveform resulting frominterference of the two transmitted signals to vary from the expected result, i.e., the interferencewaveform is modulated by the brain waves. It is believed that this is due to the fact that brain wavesproduce electric charges each of which has a component of electromagnetic radiation associated with it.The electromagnetic radiation produced by the brain waves in turn reacts with the signals transmitted tothe brain from the external source.The modulated interference waveform is re-transmitted from the brain 10, back through the skull 6. Aquantity of energy is re-transmitted sufficient to enable it to be picked up by the antenna 4. This can becontrolled, within limits, by adjusting the absolute and relative intensities of the signals, originallytransmitted to the brain. Of course, the level of the transmitted energy should be kept below that whichmay be harmful to the subject.
United States Patent: 3951134http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOF...von 723.1.2012 13:30