Miniature radio transmitter

Claim 1

A MINIATURIZED RADIO TRANSMITTER DEVICE OF THE TYPE TO BE CARRIED ON THE PERSON AND OPERATED FROM A SELFCONTAINED BATTERY POWER SOURCE, SAID TRANSMITTER DEVICE INCLUDING IN COMBINATION, HOUSING MEANS, A PRINTED CIRCUIT CHASSIS WITHIN SAID HOUSING MEANS AND HAVING ELECTRICAL CIRCUIT COMPONENTS MOUNTED THEREON, A SUBMINIATURE MICROPHONE HAVING MEANS FOR PROTECTING THE SAME AGAINST THE EFFECTS OF SHOCK AND VIBRATION, SAID MEANS INCLUDING A U-SHAPED BRACKET HAVING A BASE AFFIXED TO THE BOTTOM OF SAID MICROPHONE AND FIRST AND SECOND RESILIENT SUPPORT ARMS, EACH OF WHICH BEING FORMED BY A PLIANT SLEEVE OF SHOCK ABSORPTION MATERIAL AND ADAPTED FOR RECEIVING A PORTION OF SAID BRACKET BASE IN ONE END THEREOF AND A MOUNTING LUG IN THE OTHER END, SAID MOUNTING LUGS BEING ADAPTED FOR ATTACHMENT TO SAID PRINTED CIRCUIT CHASSIS, A FINAL AMPLIFIER CIRCUIT INCLUDING A POWER TRANSISTOR AND A DRIVER TRANSISTOR FOR APPLYING SIGNALS TO SAID POWER TRANSISTOR, AND A HEAT SINK AFFIXED TO SAID PRINTED CIRCUIT CHASSIS AND ADAPTED FOR RECEIVING SAID TRANSISTORS THEREON, SAID HEAT SINK PROVIDING THERMAL FEEDBACK FROM SAID POWER TRANSISTOR TO SAID DRIVER TRANSISTOR TO REDUCE THE OUTPUT THEREOF WITH INCREASING TEMPERATURE TO CONTROL THE CURRENT IN SAID POWER TRANSISTOR WITHIN PREDETERMINED LIMITS.