Keying systems for electric musical instruments

Claim 1

IN AN ELECTRONIC ORGAN, A SOURCE OF ALTERNATING VOLTAGE REPRESENTING MUSICAL TONE, A LOAD, A FIRST CIRCUIT INTERCONNECTING SAID SOURCE AND SAID LOAD, SAID CIRCUIT INCLUDING DIODE MEANS AND CAPACITIVE MEANS CONNECTED IN CIRCUIT WITH SAID DIODE MEANS AND SAID SOURCE, SAID DIODE MEANS BEING CONNECTED TO PROVIDE RECTIFIED CHARGING CURRENT OF ONE SIGN ONLY TO SAID CAPACTIVE MEANS FROM SAID SOURCE, SAID CAPACITIVE MEANS BEING CONNECTED COMPLETLY AND ALONE TO BACK BIAS SAID DIODE MEANS INTO NON-CONDUCTIVE STATE WITH RESPECT TO SAID ALTERNATING VOLTAGE WHEN CHARGED FROM SAID SOURCE VIA SAID DIODE MEANS, A FURTHER CIRCUIT COMPRISING IN SERIES A SOURCE OF DIRECT VOLAGE, A SWITCH AND A RESISTANCE, SAID FURTHER CIRCUIT BEING POLED AND CONNECTED TO PROVIDE CHARGING CURRENT TO SAID CAPACITIVE MEANS OF SIGN OPPOSITE TO SAID ONE SIGN AND OF MAGNITUDE SUFFICIENT TO ENABLE FREE PASSAGE OF THE ENTIRE WAVE FROM OF SAID ALTENRATING VOLTAGE THROUGH SAID DIODE MEANS TO SAID LOAD, SAID RESITANCE HAVING A VALUE WHEN TAKEN IN CONJUNCTION WITH THE CAPACITY OF SAID CAPACITIVE MEANS TO PROVIDE A TIME CONSTANT SELECTED TO PROVIDE AN AUDIBLY GRADUAL TRANSITION OF SAID DIODE MEANS FROM THE NON-CONDUCTIVE TO THE CONDUCTIVE STATE ON CLOSURE OF SAID SWITCH.