Multi-tone photoelectric musical instrument

Claim 1

IN A PHOTOELECTRIC MUSICAL INSTRUMENT AN INTERCHANGEABLE STATIONARY MODULATION PATTERN REPRESENTING BY MEANS OF DIFFERENT LIGHT TRANSMITTING QUALITIES, INDEPENDENT OF THE PITCH, AMPLITUDES AND DIFFERENCES IN PHASE OF THE HARMONIC COMPONENTS OF A COMPLEX TONE IN ONE DIRECTION (WT) AND THEIR VARIATIONS WITH TIME AND AN UNMODULATED PART IN ANOTHER DIRECTION (Z) AND A MULTI-TONE SCANNING DEVICE COMPRISING A NUMBER OF SCANNING DISKS, OBJECTIVES AND OTHER OPTICAL MEANS, A PLURALITY OF BEAM DEFLECTION APPLIANCES, LIGHT SOURCES AND PHOTOELECTRIC TRANSDUCER MEANS SAID SCANNING DISKS CONTINUOUSLY ROTATED AT CONSTANT SPEED BEING GENERALLY OPAQUE, HOWEVER PERFORATED BY A PLURALITY OF CONCENTRIC ROWS OF EQUIDISTANT SCANNING APERTURES, ONE OF SAID ROWS FOR EACH NOTE OF THE MUSICAL SCALE, SAID OBJECTIVES FORMING BY MEANS OF SAID BEAM DEFLECTION APPLIANCES OPTICAL IMAGES OF SINGLE SCANNING APERTURE OF EACH OF THE SAID ROWS ON A SECTION OF SAID MODULATION PATTERN AND ANALOGOUSLY OF THE SAME SECTION OF THE MODULATION PATTERN ON SAID ROWS, SAID SINGLE SCANNING APERTURES SCANNING SAID MODULATION PATTERN PERIODICALLY WITH THE FUNDAMENTAL FREQUENCY OF THE CORRESPONDING COMPLEX TONE IN SAID ONE DIRECTION (WT) AND SAID BEAM DEFLECTION APPLIANCES BEING OPTICALLY ARRANGED BETWEEN SAID OBJECTIVES AND SAID MODULATION PATTERN, EACH OF THEM CORRESPONDING TO ONE OF SAID ROWS AND CONTROLLING INDIVID-