Method and apparatus for securing vibrato effects

Claim 1

AN ARRANGEMENT FOR SECURING A VIRBRATO IN A MUSICAL INSTRUMENT, THE IMPROVEMENT COMPRISING A DELAY LINE INCLUDING A GROUP OF SERIALLY CONNECTED COILS AND A CAPACITOR CONNECTED BETWEEN EACH JUNCTURE AND A COMMON LEAD WHEREBY AN INPUT SIGNAL CONNECTED TO A FIRST ONE OF SAID COILS IS SHIFTED IN PHASE ON TRANSMISSION THROUGH SAID COILS, AN ARRANGEMENT FOR CYCLICALLY SCANNING RESPECTIVE JUNCTURES AT A VIBRATO RATE FOR DETECTING A SIGNAL OF SHIFTED PHASE AT THE RESPECTIVE JUNCTURES, AND A TERMINATION IMPEDANCE CONNECTED BETWEEN A LAST COIL IN SAID GROUP AND SAID COMMON LEAD, SAID TERMINATION IMPEDANCE HAVING A VALUE TO BALANCE SAID LINE TO AVOID SIGNAL REFLECTIONS AT THE END OF SAID LINE, ADDITIONAL TERMINATION IMPEDANCE HAVING A VALUE WHEN CONNECTED TO THE LAST SAID COIL IN SAID GROUP TO UNBALANCE SAID LINE TO PRODUCE SIGNAL REFLECTION AT THE END OF SAID LINE, AND SWITCH MEANS FOR CONNECTING OR DISCONNECTING SAID ADDITIONAL TERMINATION IMPEDANCE AT THE WILL OF THE OPERATOR.