Proximity warning or position separation device

Claim 1

AN INTERROGATOR-TRANSPONDER SYSTEM COMPRISING: INTERROGATING PULSE GENERATING MEANS; TRANSMITTER MEANS COUPLED TO SAID INTERROGATING PULSE GENERATING MEANS; A PLURALITY OF SEQUENTIALLY OPERABLE GATE GENERATING MEANS COUPLED IN CASCADE TO SAID INTERROGATING PULSE GENERATING MEANS; A PLURALITY OF FIXED DIRECTIONAL ANTENNAS, A PLURALITY OF RECEIVER MEANS RESPECTIVELY COUPLED TO SAID ANTENNAS; A CORRESPONDING PLURALITY OF DISPLAY CIRCUIT MEANS EACH COMPRISING A PLURALITY OF COINCIDENCE CIRCUIT MEANS EACH HAVING AN INDICATOR DEVICE COUPLED IN THE OUTPUT CIRCUIT THEREOF; A PLURALITY OF SWITCH MEANS RESPECTIVELY COUPLING AN INPUT CIRCUIT OF THE COINCIDENCE CIRCUIT MEANS IN EACH OF SAID DISPLAY MEANS IN COMMON TO ONE OF SAID RECEIVER MEANS; CIRCUIT MEANS COUPLING ANOTHER INPUT CIRCUIT OF A COINCIDENCE CIRCUIT MEANS IN EACH OF SAID DISPLAY MEANS IN COMMON TO ONE OF SAID SEQUENTIALLY OPERABLE GATE GENERATING MEANS; LONG GATE GENERATING MEANS HAVING THE INPUT CIRCUIT THEREOF COUPLED TO SAID INTERROGATING PULSE GENERATING MEANS AND HAVING THE OUTPUT CIRCUIT THEREOF COUPLED IN COMMON TO EACH OF SAID SWITCH MEANS; AND AMPLIFIER MEANS HAVING THE INPUT CIRCUIT THEREOF COUPLED IN COMMON TO SAID SWITCH MEANS AND THE OUTPUT CIRCUIT THEREOF COUPLED TO SAID TRANSMITTER MEANS AND TO THE INPUT CIRCUIT OF SAID LONG GATE GENERATING MEANS.