Vibrating reticle star tracker

Claim 1

A VIBRATING RETICLE STAR TRACKER COMPRISING: A TELESCOPE, A FIXED RETICLE MOUNTED IN THE FOCAL PLANE OF SAID TELESCOPE, SAID FIXED RETICLE HAVING ALTERNATE CLEAR AND OPAQUE LINES, THE LINES IN ONE SEGMENT BEING OPPOSITELY DISPOSED TO THE LINES IN ANOTHER SEGMENT, A MOVABLE RETICLE MOUNTED ON A REED ADJACENT SAID FIXED RETICLE, SAID MOVABLE RETICLE HAVING ALTERNATE CLEAR AND OPAQUE LINES THROUGHOUT, SAID REED HAVING ONE END ANCHORED IN SAID TELESCOPE, STOP MEANS FOR LIMITING THE MOVEMENT OF SAID REED TO ONE LINE WIDTH OF SAID RETICLE, ELECTRICAL DRIVE MEANS HAVING A VARYING POTENTIAL FOR VIBRATING SAID REED, THE OPAQUE LINES OF SAID MOVABLE RETICLE ALTERNATELY COVERING AND UNCOVERING THE CLEAR LINES OF SAID FIXED RETICLE SEGMENTS, THE LIGHT FROM A SOURCE PASSING THROUGH THE CLEAR LINES OF ONE OF SAID SEGMENTS AND BEING BLOCKED BY THE OTHER SEGMENT DEPENDING ON THE POSITION OF SAID LIGHT SOURCE WITH RESPECT TO SAID RETICLES, PHOTOSENSITIVE MEANS FOR DETECTING THE LIGHT FROM SAID SOURCE, A SIGNAL PRODUCED BY SAID PHOTOSENSITIVE MEANS BEING FED TO A PHASE-SENSITIVE DEMODULATOR CONNECTED WITH SAID ELECTRICAL DRIVE MEANS HAVING A VARYING POTENTIAL, SAID DEMODULATOR PROVIDING A DRIVE SIGNAL THROUGH AN AMPLIFIER OF APPROPRIATE POLARITY TO OPERATE A MOTOR; AND MECHANISM INTERCONNECTED WITH SAID TELESCOPE DRIVEN BY SAID MOTOR TO CENTER SAID TELESCOPE WITH RESPECT TO SAID LIGHT SOURCE.