Contactless electrical transducer having moving parts

Claim 1

IN COMBINATION: A PAIR OF JUXTAPOSED STATIONARY PLATES HAVING CONFRONTING EDGES, SAID EDGES BEING SEPARATED BY A GAP DEFINED BY THE CONTOURS OF SAID EDGES, SAID PLATES HAVING INPUT LEADS THROUGH WHICH TO CHARGE SAID PLATES SO AS TO HAVE CHARGE POTENTIALS OF OPPOSITE POLARITY; A MOVABLE PLATE PARALLEL TO SAID PAIR OF PLATES AND ADAPTED FOR MOVEMENT PARALLEL THERETO SO AS TO SPAN SAID GAP AND HAVE PORTIONS CONFRONTING BOTH PLATES OF SAID PAIR, SAID MOVABLE PLATE WHEN SPANNING SAID GAP BEING CHARGED AN AMOUNT CORRESPONDING TO THE DIFFERENT BETWEEN THE PORTIONS THEREOF CONFRONTING BOTH PLATES OF SAID PAIR, SAID MOVABLE PLATE ALSO BEING MOVABLE TO CONFRONT EITHER ONE OF THE PLATES OF SAID PAIR AND CHARGED AN AMOUNT CORRESPONDING TO THE CHARGE ON SUCH ONE PLATE; A FURTHER STATIONARY PLATE TO BE CHARGED FROM SAID MOVABLE PLATE BUT WHICH IS NOT CAPACTIVELY COUPLED THERETO, SAID MOVABLE PLATE HAVING A PLATE SECTION IN FIXED SPACED RELATION AND ELECTRICALLY CONNECTED THEREWITH WHICH IS MOVABLE PARALLEL TO AND CAPACITIVELY COUPLED TO SAID FURTHER PLATE, SAID FURTHER PLATE BEING ADAPTED TO BE CHARGED FROM SAID PLATE SECTION, THE CAPACITANCE BETWEEN SAID PLATE SECTION AND SAID FURTHER PLATE BEING CONSTANT THROUGHOUT MOVEMENT OF SAID MOVABLE PLATE, SAID FURTHER PLATE HAVING AN OUTPUT LEAD; AND MEANS FOR EFFECTING MOVEMENT OF SAID MOVABLE PLATE AND PLATE SECTION IN UNISON.