Apparatus including bivolumetric tone subaudition means for positionally spotting and tracing subjacently concealed conductive structures

Claim 1

A receptor apparatus wherein the utility lies as a means for providing improved acuity and sense of relative, say, right or left hand, perceptibility as to the lay of a concealed structure through the novel use of a plurality of separate position indicative sensory indications to an operator, said receptor including in operative combination; a. Plural inducer means arranged in a noncoincident relationship for the interception of electromagnetic field lines of various magnitudes produced sympathetically in the said concealed structure by separate exciter means, said exciter means operative to provide at least two distinctly different higher frequency alternating current signals each of which is modulated in amplitude at an audio frequency rate, wherein each of said plural inducer means is responsive to a different one of the said distinctly different frequencies so as to provide minute alternating current levels proportional to the relative power of the said electromagnetic induction field lines at the respective frequency intercepted by each of the said plural inducers, b. A.C. amplifier means, with plural inputs connected to said plural inducer means, operative to independently amplify said minute alternating current levels produced by each of the operatively connected plural inducer means to provide plural different frequency output signals of increased amplitude, each of said different frequency output signals being proportional to each of the respective plural minute alternating current level AC amplifier inputs, c. a plurality of detector means, each operative to detect a respective one of the different frequency plural A.C. amplifier output signals from the operatively connected A.C. amplifier means for producing plural audio signal outputs from said detector means, each audio signal output being proportional in amplitude to a respective one of the said minute alternating current level inputs, d. Audio amplifier means coupled to the output of each of the detector means operative to independently amplify each of the said plural audio signal outputs derived from said detector means, e. Audio reproducer means comprising a plurality of separate transducers with at least one of said transducers coupled to each of the said audio amplifier means to provide at least two audio tone sensations for the operator consisting of at least a left ear signal and a right ear signal the respective volumes of which are individually proportional to a respective one of the said plural audio signal inputs to the reproducer means, f. D.C. power source operative connected to each the said A.C. amplifier means, detector means, and audio amplifier means.