Piezoelectric liquid cleaning device

Claim 1

IN COMBINATION WITH A LIQUID BATH IN WHICH ARTICLES TO BE CLEANED ARE IMMERSED AND WHICH IS SUBJECT TO A RANGE OF VARIATIONS IN WORK LOAD, A PLURALITY OF VIBRATABLE MEANS IN DRIVING CONTACT WITH SAID LIQUID BATH, SAID VIBRATABLE MEANS HAVING A RANGE OF RESONANT FREQUENCIES OVER SAID RANGE OF VARIATIONS IN WORK LOAD, A POWER SOURCE OF RELATIVELY LOW FREQUENCY ALTERNATING CURRENT, MEANS ENERGIZED FROM SAID POWER SOURCE TO GENERATE A SPECTRUM OF RELATIVELY HIGH DRIVING FREQUENCIES AND COMPRISING A TANK CIRCUIT WITH A PLURALITY OF BRANCHES AND INCLUDING A PLURALITY OF SERIES-CONNECTED SPARK GAPS IN INCLUDING A PLURALITY OF SERIES-CONNECTED SPARK GAPS IN FORMER HAVING A RELATIVELY HIGH LEAKAGE REACTANCE BETWEEN ITS PRIMARY AND SECONDARY WINDINGS, THE POWER SOURCE BEING CONNECTED TO THE PRIMARY WINDING OF THE TRANSFORMER AND THE SECONDARY WINDING BEING CONNECTED TO SAID TANK CIRCUIT, WHEREBY SAID INPUT TRANSFOMER HAS A HIGH TRANSFER REACTANCE AT THE RESONANT FREQUENCY OF THE TANK CIRCUIT BUT HAS A RELATIVELY SMALL TRANSFER REACTANCE TO THE FREQUENCY OF THE POWER SOURCE SO THAT RELATIVELY LITTLE ENERGY IS REFLECTED BACK FROM THE TANK CIRCUIT TO THE POWER SOURCE, AND MEANS APPLYING SAID DRIVING FREQUENCIES TO SAID PLURALITY OF VIBRATABLE MEANS, SAID SPECTRUM OF DRIVING FREQUENCIES SUBSTANTIALLY CORRESPONDING TO SAID RANGE OF RESONANT FREQUENCIES OF SAID VIBRATABLE MEANS OVER SAID RANGE OF VARIATIONS IN WORK LOAD.