Tone control receiver circuit

Claim 1

IN A SELECTIVE COMMUNICATIONS SYSTEM, A RECEIVER RESPONSIVE TO A CARRIER WAVE MODULATED BY AUDIO INTELLIGENCE SIGNALS AND BY AN AUDIO TONE SIGNAL, SAID RECEIVER INCLUDING IN COMBINATION; A DETECTOR FOR DERIVING SAID AUDIO INTELLIGENCE AND TONE SIGNALS FROM SAID RECEIVED CARRIER WAVE, AUDIO AMPLIFIER MEANS INCLUDING CIRCUIT MEANS TO RENDER THE SAME OPERATIVE TO CONDUCT INTELLIGENCE SIGNALS ONLY UPON THE APPLICATION OF A CONTROL POTENTIAL THERETO, AND A TONE OPERATED SQUELCH CIRCUIT INCLUDING TONE AMPLIFYING MEANS, FILTER NETWORK MEANS FOR APPLYING SIGNALS TO SAID TONE AMPLIFYING MEANS, SAID FILTER NETWORK MEANS INCLUDING A FIRST PORTION HAVING A LOW PASS CHARACTERISTIC FOR PASSING SAID AUDIO TONE SIGNALS AND A SECOND PORTION FOR PASSING A PORTION OF THOSE FREQUENCIES ABOVE THE RANGE OF SAID AUDIO INTELLIGENCE SIGNALS, MEANS INCLUDING A RESONANT REED DEVICE COUPLED TO SAID TONE AMPLIFYING MEANS AND OPERATIVE TO PRODUCE A CONTROL POTENTIAL IN RESPONSE TO A PREDETERMINED AUDIO TONE SIGNAL, MEANS APPLYING SAID CONTROL POTENTIAL TO SAID AUDIO AMPLIFYING MEANS TO RENDER THE SAME CONDUCTIVE SO THAT SAID AUDIO INTELLIGENCE IS TRANSLATED THEREBY, AND NOISE GATING MEANS COUPLED BETWEEN SAID SECOND FILTER PORTION AND A REFERENCE POTENTIAL AND FURTHER COUPLED TO SAID AUDIO AMPLIFIER, SAID TONE AMPLIFIER MEANS REDUCING THE AMPLIFICATION OF FREQUENCIES PASSED BY SAID FIRST FILTER PORTION IN THE PRESENCE OF THE FREQUENCIES ABOVE SAID AUDIO INTELLIGENCE SIGNALS FROM SAID SECOND FILTER PORTION, SAID AUDIO AMPLIFYING MEANS WHEN CONDUCTING ACTUATING SAID HIGH FREQUENCY GATING MEANS TO BYPASS SAID FREQUENCIES PASSED BY SAID SECOND FILTER PORTION TO SAID REFERENCE POTENTIAL, WHEREBY THE LEVEL OF FREQUENCIES PASSED BY SAID FIRST FILTER PORTION AND APPLIED BY SAID TONE AMPLIFIER MEANS TO SAID REED DEVICE, IS INCREASED.