Combination radio receiver and underwater doppler acoustical device

Claim 1

THE COMBINATION OF SUPERHETERODYNE RADIO RECEIVER AND UNDERWATER DOPPLER ACOUSTICAL DEVICE FOR DETECTING VELOCITY OF A TARGET RELATIVE TO THE LOCATION OF SAID DEVICE; SAID RECEIVER INCLUDING AN ANTENNA, A SELECTOR HAVING A VARIABLE TUNED CIRCUIT CONNECTED FROM SAID ANTENNA, A LOCAL OSCILLATOR, A MIXER, THE OUTPUT OF SAID LOCAL OSCILLATOR AND SELECTOR BEING CONNECTED TO SAID MIXER, A TUNED INTERMEDIATE FREQUENCY AMPLIFIER CONNECTED FROM THE OUTPUT OF SAID MIXER, DETECTOR MEANS CONNECTED FROM THE OUTPUT OF SAID INTERMEDIATE FREQUENCY AMPLIFIER FOR DEMODULATING AMPLIFIER MODULATED SIGNALS ARRIVING AT SAID ANTENNA, AUDIO AMPLIFIER MEANS CONNECTED TO THE OUTPUT OF SAID DETECTOR, SAID FIRST TRANSDUCER MEANS CONNECTED TO THE OUTPUT OF SAID AUDIO AMPLIFIER FOR CONVERTING THE OUTPUT THEREOF TO SOUND ENERGY; SAID DOPPLER ACOUSTICAL DEVICE INCLUDING A TRANSMITTER OSCILLATOR, AND SECOND TRANSDUCER MEANS FOR RADIATING ACOUSTICAL ENERGY INTO THE WATER IN RESPONSE TO ENERGIZATION OF SAID OSCILLATOR, AND FOR RECEIVING OCOUSTICAL ENERGY, SAID SECOND TRANSDUCER MEANS INCLUDING AN OUTPUT CHANNEL FOR PROVIDING A SIGNAL IN RESPONSE TO ACOUSTICAL ENERGY TRANSMITTED THROUGH THE WATER; CONNECTOR MEANS FOR COUPLING THE OUTPUT CHANNEL OF SAID SECOND TRANSDUCER TO THE INPUT OF SAID RECEIVER AND FOR DISCONNECTING SAID LOCAL OSCILLATOR; SAID COMBINATION ALSO INCLUDING FIRST SWITCH MEANS HAVING A FIRST POSITION FOR ENABLING VOICE COMMUNICATION BETWEEN SAID FIRST TRANSDUCER AND THE WATER, AND A SECOND POSITION FOR ENERGIZING SAID TRANSMITTER OSCILLATOR WHEREBY REFLECTIONS OF SAID TRANSMITTED ACOUSTICAL ENERGY RECEIVED BY SAID SECOND TRANSDUCER MEANS ARE MIXED WITH THE OUTPUT FREQUENCY OF SAID TRANSMITTER OSCILLATOR TO PRODUCE DOPPLER SIGNALS, AND MEANS FOR COUPLING SAID DOPPLER SIGNALS TO SAID FIRST TRANSDUCER MEANS TO INDICATE RELATIVE VELOCITY BETWEEN SAID SECOND TRANSDUCER MEANS AND A TARGET.