Frequency compensated phase clock

Claim 1

A FREQUENCY COMPENSATED PHASE CLOCK COMPRISING A SOURCE OF EXCITATION REFERENCED TO GROUND POTENTIAL, A RESOLVER HAVING AT LEAST ONE ROTOR WINDING CONNECTED TO SAID SOURCE OF EXCITATION AND ADAPTED TO BE ANGULARLY DISPLACED, A FIRST AND SECOND STATOR WINDING DISPLACED 90* FROM EACH OTHER AND CONNECTED AT A COMMON POINT TO THE GROUND POTENTIAL AND INDUCTIVELY COUPLED TO SAID ROTOR WINDING PROVIDING THEREON SIGNALS WHOSE AMPLITUDES VARY IN ACCORDANCE WITH THE SINE AND COSINE OF THE ANGULAR DISPLACEMENT OF THE ROTOR, A RESISTIVE AND A REACTIVE ELEMENT SERIALLY CONNECTED ACROSS THE STATOR WINDINGS AND PROVIDING AT THE JUNCTION OF THE TWO ELEMENTS AN OUTPUT SIGNAL WHOSE PHASE IS DISPLACED IN ACCORDANCE WITH THE ANGULAR DISPLACEMENT OF THE ROTOR, SAID SIGNAL ALSO CONTAINING AN ERROR PHASE DISPLACEMENT IN ACCORDANCE WITH FREQUENCY VARIATIONS OF THE SOURCE FROM A PREDETERMINED CENTER FREQUENCY, A COUPLING TRANSFORMER HAVING A PRIMARY WINDING CONNECTED ACROSS THE STATORS AND A SECONDARY WINDING, A DOUBLE DAMPED NETWORK HAVING AN INPUT CONNECTED TO SAID SECONDARY WINDING AND A TWO TERMINAL OUTPUT HAVING ONE TERMINAL CONNECTED TO THE JUNCTION OF THE TWO ELEMENTS PROVIDING AT THE OTHER TERMINAL RELATIVE TO GROUND POTENTIAL A COMPENSATED OUTPUT SIGNAL WHOSE PHASE ANGLE IS PROPORTIONAL TO THE ANGULAR DISPLACEMENT OF THE ROTOR AND WHICH IS SUBSTANTIALLY INSENSITIVE TO FREQUENCY VARIATION OF THE SOURCE FROM THE PREDETERMINED CENTER FREQUENCY.