Quartz accelerometer

Claim 1

AN ACCELEROMETER COMPRISING A HOUSING HAVING A CHAMBER THEREIN, A PENDULUM HAVING A CONDUCTIVE BOX ON ONE END THEREOF AND SUPPORTED FOR SWINGING MOVEMENT WITHIN SAID CHAMBER AT THE OTHER END THEREOF, SAID BOX HAVING AN OPENING EXTENDING THERETHROUGH DEFINED IN PART BY A PAIR OF PARALLEL SPACED APART WALLS EXTENDING IN THE DIRECTION OF MOVEMENT OF SAID BOX, SAID OPENING BEING INTERRUPTED BY A CONDUCTIVE MEMBRANE EXTENDING PERPENDICULARLY BETWEEN SAID PAIR OF WALLS IN A MANNER TO FORM A PAIR OF OUTWARDLY PRESENTING RECESS IN THE BOX, A PAIR OF INSULATED BLOCKS ON SAID HOUSING PROJECTING INTO AND SUBSTANTIALLY FILLING DIFFERENT ONES OF SAID RECESS, THREE CONDUCTIVE PLATES ON EACH OF SAID INSULATED BLOCKS, EACH OF SAID BLOCKS HAVING ONE PLATE THEREON PARALLEL AND ADJACENT TO ONE OF SAID WALLS, A SECOND PLATE THEREON PARALLEL TO SAID MEMBRANE AND A THIRD PLATE THEREON PARALLEL AND ADJACENT TO THE OTHER OF SAID WALLS, AND CONTROL MEANS FOR CONNECTING SAID SECOND PLATES AND CONDUCTIVE MEMBRANE AS A CAPACITOR PICKOFF WITH THE CONDUCTIVE MEMBRANE ACTING AS THE MOVABLE ELEMENT AND CONNECTING THE REMAINING PLATES AND WALLS AS CAPACITORS FOR EXERTING ELECTROSTATIC FORCES ON THE CONDUCTIVE BOX IN RESPONSE TO THE OUTPUT SIGNAL OF THE CAPACITOR PICKOFF TO RESTRAIN THE PENDULUM IN THE NULL POSITION.