Percussion tone generating device

Claim 1

IN AN ELECTRICAL MUSICAL INSTRUMENT, THE COMBINATION COMPRISING: A TONE SIGNAL SOURCE HAVING A TONE SIGNAL OUTPUT TERMINAL; A PLURALITY OF KEYS; A PLURALITY OF SWITCHES; MEANS COUPLING SAID PLURALITY OF SWITCHES TO ONE OF SAID KEYS WHEREBY SWITCHES OF SAID PLURALITY ARE OPERABLE IN SEQUENCE BY ACTUATION OF ONE OF SAID KEYS; FIRST CAPACITANCE MEANS COUPLED THROUGH A FIRST SWITCH OF SAID PLURALITY TO A FIRST TERMINAL AT SUBSTANTIALLY CONSTANT NEGATIVE POTENTIAL TO CHARGE SAID FIRST CAPACITANCE MEANS; SECOND CAPACITANCE MEANS COUPLED THROUGH A SECOND SWITCH OF SAID PLURALITY OF SWITCHES TO A SOURCE OF POSITIVE POTENTIAL TO ESTABLISH AN INITIAL POSITIVE CHARGE ON SAID SECOND CAPACITANCE MEANS; FIRST RESISTANCE MEANS COUPLING SAID TONE SIGNAL SOURCE TO SAID SECOND CAPACITANCE MEANS; A THIRD SWITCH, SAID THIRD SWITCH BEING CLOSABLE AFTER SAID SECOND SWITCH IS OPENED, AND SAID THIRD SWITCH BEING OPERABLE, WHEN CLOSED, TO COUPLE SAID SECOND CAPACITANCE MEANS AND SAID FIRST RESISTANCE MEANS TO SAID FIRST CAPACITANCE MEANS TO THEREUPON INITIATE REVERSAL OF THE CHARGE OF SAID SECOND CAPACITANCE MEANS BY SAID FIRST CAPACITANCE AND INITIATE THE NEGATIVE RISE PORTION OF AN IMPULSE VOLTAGE APPLIED TO SAID TONE SIGNAL SOURCE; THIRD CAPACITANCE MEANS AND SECOND RESISTANCE MEANS COUPLED TO SAID SECOND CAPACITANCE MEANS TO PARTIALLY DISCHARGE SAID SECOND CAPACITANCE MEANS AND PROVIDE A DECREASE IN THE IMPULSE VOLTAGE APPLIED TO SAID TONE SIGNAL SOURCE, SAID THIRD CAPACITANCE MEANS HAVING LESS CAPACITANCE THAN SAID SECOND CAPACITANCE MEANS; SAID THIRD AND SECOND SWITCHES THEN BEING OPERABLE WHEN AGAIN OPENED AND CLOSED, RESPECTIVELY, TO PROVIDE A DISCHARGE PATH THROUGH SAID SECOND SWITCH TO SAID SOURCE OF POSITIVE POTENTIAL TO RAPIDLY DISCHARGE THE REMAINING NEGATIVE POTENTIAL FROM SAID SECOND CAPACITANCE MEANS AND RE-ESTABLISH A POSITIVE CHARGE THEREON.