Oscillating motor for horological instruments

Claim 1

AN ELECTRICALLY MAINTAINED BALANCE COMPRISING A BALANCE MOUNTED FOR ROTATION ABOUT AN AXIS AND SPRING RESTRAINED TOWARDS A DATUM POSITION SO THAT IT MAY OSCILLATE ABOUT THE DATUM POSITION, TWO FLAT COILS SIMILARLY MOUNTED APART ON THE BALANCE SO THAT AS THE BALANCE OSCILLATES THE TWO COILS HAVE A COMMON PATH OF MOVEMENT WHICH SUBSTANTIALLY LIES IN A SURFACE OF REVOLUTION ABOUT THE SAID AXIS, FIXED MAGNETIC MEANS ESTABLISHING A REGION OF MAGNETIC FLUX IN WHICH THE FLUX INTERSECTS THE SAID PATH OF MOVEMENT, THE POSITION OF THE COILS ON THE BALANCE BEING SUCH THAT WHEN THE BALANCE IS IN ITS DATUM POSITION THE COILS LIE RESPECTIVELY ON EITHER SIDE OF THE SAID REGION, ELECTRIC PULSE GENERATING MEANS CONNECTED TO THE COILS, AND MEANS RESPONSIVE TO THE ANGULAR POSITION OF THE BALANCE ACTING ON THE PULSE GENERATING MEANS TO CAUSE IT TO PASS CURRENT PULSES THROUGH THE COILS WHEN THEY ARE PASSING THROUGH THE SAID REGION SO AS TO MAINTAIN THE OSCILLATIONS, THE BALANCE THEREBY RECEIVING FOR EACH DIRECTION OF SWING TWO DISTINCT MAINTAINING IMPULSES AT EQUAL TIME INTERVALS BEFORE AND AFTER THE BALANCE PASSES THROUGH THE DATUM POSITION.