Radio rescue beacon

• US 3,176,229 A
• Filed: 11/07/1962
• Issued: 03/30/1965
• Est. Priority Date: 11/09/1961
• Status: Expired due to Term

• Current Assignee: Reginald R. Pierce
• Original Assignee: Reginald R. Pierce
• Inventors: Pierce, Reginald R.
• Application Number:
  US04/236,076
• Time in Patent Office: 874 Days
• US Class Current: 342/385
• CPC Class Codes: G01S 1/68 Marker, boundary, call-sign, or like beacons transmitting signals not carrying directional information
• CPC Class Codes: H02M 3/3372 of the parallel type
• CPC Class Codes: H04B 1/034 Portable transmitters
• CPC Class Codes: H04L 15/22 Apparatus or circuits for sending one or a restricted number of signals, e.g. distress signals

Claims

1. A BATTERY OPERATED RADIO RESCUE BEACON EMPLOYING SEMICONDUCTOR DEVICES AS THE SOLE ACTIVE ELEMENTS, COMPRISING:

A SEMICONDUCTOR CRYSTAL CONTROLLED RADIO FREQUENCY OSCILLATOR;

A SEMICONDUCTOR AMPLIFIER CONNECTED TO RECEIVE AND AMPLIFY OSCILLATIONS FROM THE SAID OSCILLATOR;

AND A FREQUENCY MULTIPLIER STAGE CONNECTED TO RECEIVE AMPLIFIED OSCILLATIONS FROM THE SAID AMPLIFIER, THE SAID STAGE INCLUDING A SEMICONDUCTOR VOLTAGE VARIABLE CAPACITY DIODE CONNECTED TO A SOURCE OF REVERSE BIAS, AND FURTHER INCLUDING A CIRCUIT TUNED TO A MULTIPLE OF THE FREQUENCY OF THE SAID OSCILLATIONS, ACROSS WHICH THE OUTPUT FROM THE SAID DIODE IS DEVELOPED AT A FREQUENCY WHICH IS THE SAID MULTIPLE OF THAT OF THE OSCILLATIONS RECEIVED BY THE STAGE, THE SAID STAGES COMPRISING A TRANSMITTER;

AN ANTENNA;

AND A TRANSISTOR OSCILLATOR D.C.-D.C. CONVERTER OF THE PUSHPULL TRANSFORMER TYPE CONNECTED TO PROVIDE THE POWER SUPPLIES TO AT LEAST THE LAST TWO STAGES OF THE SAID TRANSMITTER, THE SAID CONVERTER INCLUDING AN UNSMOOTHED RECTIFIER IN THE OUTPUT THEREOF, WHEREBY TO EFFECT A HIGH MODULATION OF THE TRANSMITTER SIGNAL, THE SAID CONVERTER BEING ARRANGED TO OPERATE WITH ONE TRANSISTOR CONDUCTING FOR SUBSTANTIALLY MORE OF EACH PERIOD OF OSCILLATION THAN THE OTHER, THE SAID RECTIFIER BEING CONNECTED SO AS TO SUPPLY THE SAID TRANSMITTER STAGES WHILE THE LONGER DUTY TRANSISTOR IS OPERATING.