System for automatic electric recording and indicating a code marked by means of passive circuit elements on a vehicle

Claim 1

A SYSTEM FOR CONVEYING A BINARY CODED INFORMATION FROM A FIRST STATION TO A SECOND STATION, ONE OF SAID STATIONS BEING MOVABLE ALONG A PREDETERMINED PATH OF TRAVEL AND THE OTHER OF SAID STATIONS BEING STATIONARY ADJACENT TO SAID PATH OF TRAVEL, COMPRISING, IN COMBINATION, CODE SIGNAL DETERMINING MEANS AT SAID FIRST STATION AND CODE READING MEANS AT SAID SECOND STATION, SAID CODE READING MEANS AT SAID SECOND STATION INCLUDING INPUT INDUCTANCE COIL MEANS AND OUTPUT INDUCTANCE COIL MEANS AND ELECTRICAL SIGNAL AMPLIFYING MEANS CONNECTED BETWEEN SAID INPUT COIL MEANS AND SAID OUTPUT COIL MEANS, SAID INPUT COIL MEANS AND SAID OUTPUT COIL MEANS BEING SPACED FROM EACH OTHER A DISTANCE SUFFICIENT TO PREVENT MUTUAL INDUCTIVE COUPLING BETWEEN THEM AND TO THEREBY PREVENT ELECTRICAL SELF-OSCILLATION IN SAID ELECTRICAL SIGNAL AMPLIFYING MEANS, SAID ELECTRICAL SIGNAL AMPLIFYING MEANS COMPRISING TWO SEPARATE AMPLIFIER CHANNELS CONNECTED BETWEEN SAID INPUT COIL MEANS AND SAID OUTPUT COIL MEANS AND A RESONANT CIRCUIT BEING COMMON TO BOTH SAID AMPLIFIER CHANNELS AND BEING TUNED TO A PREDETERMINED FREQUENCY EACH OF SAID AMPLIFIER CHANNELS BEING ADAPTED TO IMPART A PHASE SHIFT DIFFERENT FROM THAT IMPARTED BY THE OTHER OF SAID AMPLIFIER CHANNELS TO A SIGNAL OF SAID PREDETERMINED FREQUENCY TRANSFERRED THROUGH THE RESPECTIVE AMPLIFIER CHANNEL FROM SAID INPUT COIL TO SAID OUTPUT COIL, SAID DIODE SIGNAL DETERMINING MEANS AT SAID FIRST STATION INCLUDING FOR EACH BINARY DIGIT OF BINARY CODED INFORMATION TO BE CONVEYED AN INDUCTANCE COIL SYSTEM COMPRISING A FIRST INDUCTANCE COIL AND A SECOND INDUCTANCE COIL AND SWITCHING MEANS FOR MUTUALLY INTERCONNECTING SAID FIRST AND SECOND INDUCTANCE COILS, SAID FIRST AND SECOND INDUCTANCE COILS BEING SPACED FROM EACH OTHER A DISTANCE SUBSTANTIALLY EQUAL TO THE DISTANCE BETWEEN SAID INPUT AND OUTPUT COIL MEANS OF SAID CODE READING MEANS AND SO DISPOSED AS TO BE INDUCTIVELY COUPLED TO SAID OUTPUT COIL MEANS AND SAID

Claim 2

A SYSTEM FOR CONVEYING A BINARY CODED INFORMATION FROM A FIRST STATION TO A SECOND STATION, ONE OF SAID STATIONS BEING MOVABLE ALONG A PREDETERMINED PATH OF TRAVEL AND THE OTHER OF SAID STATIONS BEING STATIONARY ADJACENT TO SAID PATH OF TRAVEL, COMPRISING, IN COMBINATION, CODE SIGNAL DETERMINING MEANS AT SAID FIRST STATION AND CODE READING MEANS AT SAID SECOND STATION, SAID CODE READING MEANS AT SAID SECOND STATION INCLUDING INPUT INDUCTANCE COIL MEANS AND OUTPUT INDUCTANCE COIL MEANS AND ELECTRICAL SIGNAL AMPLIFYING MEANS CONNECTED BETWEEN SAID INPUT COIL MEANS AND SAID OUTPUT COIL MEANS, SAID INPUT COIL MEANS AND SAID OUTPUT COIL MEANS BEING SPACED FROM EACH OTHER A DISTANCE SUFFICIENT TO PREVENT MUTUAL INDUCTIVE COUPLING BETWEEN THEM AND TO THEREBY PREVENT ELECTRICAL SELF-OSCILLATION IN SAID ELECTRICAL SIGNAL AMPLIFYING MEANS, SAID ELECTRICAL SIGNAL AMPLIFYING MEANS COMPRISING TWO SEPARATE AMPLIFIER CHANNELS CONNECTED BETWEEN SAID INPUT COIL MEANS AND SAID OUTPUT COIL MEANS AND A RESONANT CIRCUIT BEING COMMON TO BOTH SAID AMPLIFIER CHANNELS AND BEING TUNED TO A PREDETERMINED FREQUENCY EACH OF SAID AMPLIFIER CHANNELS BEING ADAPTED TO IMPART A PHASE SHIFT DIFFERENT FROM THAT IMPARTED BY THE OTHER OF SAID AMPLIFIER CHANNELS TO A SIGNAL OF SAID PREDETERMINED FREQUENCY TRANSFERRED THROUGH THE RESPECTIVE AMPLIFIER CHANNEL FROM SAID INPUT COIL TO SAID OUTPUT COIL, SAID DIODE SIGNAL DETERMINING MEANS AT SAID FIRST STATION INCLUDING FOR EACH BINARY DIGIT OF BINARY CODED INFORMATION TO BE CONVEYED AN INDUCTANCE COIL SYSTEM COMPRISING A FIRST INDUCTANCE COIL AND A SECOND INDUCTANCE COIL AND SWITCHING MEANS FOR MUTUALLY INTERCONNECTING SAID FIRST AND SECOND INDUCTANCE COILS, SAID FIRST AND SECOND INDUCTANCE COILS BEING SPACED FROM EACH OTHER A DISTANCE SUBSTANTIALLY EQUAL TO THE DISTANCE BETWEEN SAID INPUT AND OUTPUT COIL MEANS OF SAID CODE READING MEANS AND SO DISPOSED AS TO BE INDUCTIVELY COUPLED TO SAID OUTPUT COIL MEANS AND SAID