Direction finding system for hunting dogs
First Claim
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1. A DIRECTION FINDING SYSTEM COMPRISING, IN COMBINATION:
- A. A PORTABLE RADIO TRANSMITTER CARRIED BY A MOVING BODY, SAID TRANSMITTER HAVING (1) AN OSCILLATOR DEVELOPING HIGH FREQUENCY ELECTRICAL ENERGY, (2) AN OMNIDIRECTIONAL ANTENNA COUPLED TO SAID OSCILLATOR TO RADIATE SAID ELECTRICAL ENERGY INTO SPACE IN THE FORM OF RADIO SIGNALS, (3) A MODULATOR INCLUDING AN ASTABLE MULTIVIBRATOR AND A CAPACITOR CONNECTED TO SAID OSCILLATOR TO PULSE MODULATE SAID RADIO SIGNALS, AND (4) ACCELERATION RESPONSIVE MEANS COMPRISING A SWITCH OPERATING TO SHORT OUT SAID CAPACITOR IN RESPONSE TO MOVEMENT OF SAID BODY SO AS TO VARY THE PULSE MODULATING RATE OF SAID MODULATOR ACCORDING TO THE MOTIONAL ACTIVITY OF SAID BODY;
AND B. A REMOTELY LOCATED RECEIVER TUNED TO THE FREQUENCY OF SAID RADIO SIGNALS TRANSMITTED BY SAID TRANSMITTER, SAID RECEIVER HAVING (1) A DIRECTIONAL ANTENNA RESPONDING TO SAID RADIO SIGNALS, (2) A DEMODULATOR CONNECTED TO SAID DIRECTIONAL ANTENNA TO DEMODULATE SAID RADIO SIGNALS, AND (3) OUTPUT MEANS CONNECTED TO SAID DEMODULATOR TO PROVIDE AN INDICATION OF THE DIRECTION FROM SAID RECEIVER TO SAID TRANSMITTER AND THE ACTIVITY OF SAID MOVING BODY CARRYING SAID TRANSMITTER.
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1 Claim
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1. A DIRECTION FINDING SYSTEM COMPRISING, IN COMBINATION:
- A. A PORTABLE RADIO TRANSMITTER CARRIED BY A MOVING BODY, SAID TRANSMITTER HAVING (1) AN OSCILLATOR DEVELOPING HIGH FREQUENCY ELECTRICAL ENERGY, (2) AN OMNIDIRECTIONAL ANTENNA COUPLED TO SAID OSCILLATOR TO RADIATE SAID ELECTRICAL ENERGY INTO SPACE IN THE FORM OF RADIO SIGNALS, (3) A MODULATOR INCLUDING AN ASTABLE MULTIVIBRATOR AND A CAPACITOR CONNECTED TO SAID OSCILLATOR TO PULSE MODULATE SAID RADIO SIGNALS, AND (4) ACCELERATION RESPONSIVE MEANS COMPRISING A SWITCH OPERATING TO SHORT OUT SAID CAPACITOR IN RESPONSE TO MOVEMENT OF SAID BODY SO AS TO VARY THE PULSE MODULATING RATE OF SAID MODULATOR ACCORDING TO THE MOTIONAL ACTIVITY OF SAID BODY;
AND B. A REMOTELY LOCATED RECEIVER TUNED TO THE FREQUENCY OF SAID RADIO SIGNALS TRANSMITTED BY SAID TRANSMITTER, SAID RECEIVER HAVING (1) A DIRECTIONAL ANTENNA RESPONDING TO SAID RADIO SIGNALS, (2) A DEMODULATOR CONNECTED TO SAID DIRECTIONAL ANTENNA TO DEMODULATE SAID RADIO SIGNALS, AND (3) OUTPUT MEANS CONNECTED TO SAID DEMODULATOR TO PROVIDE AN INDICATION OF THE DIRECTION FROM SAID RECEIVER TO SAID TRANSMITTER AND THE ACTIVITY OF SAID MOVING BODY CARRYING SAID TRANSMITTER.
- A. A PORTABLE RADIO TRANSMITTER CARRIED BY A MOVING BODY, SAID TRANSMITTER HAVING (1) AN OSCILLATOR DEVELOPING HIGH FREQUENCY ELECTRICAL ENERGY, (2) AN OMNIDIRECTIONAL ANTENNA COUPLED TO SAID OSCILLATOR TO RADIATE SAID ELECTRICAL ENERGY INTO SPACE IN THE FORM OF RADIO SIGNALS, (3) A MODULATOR INCLUDING AN ASTABLE MULTIVIBRATOR AND A CAPACITOR CONNECTED TO SAID OSCILLATOR TO PULSE MODULATE SAID RADIO SIGNALS, AND (4) ACCELERATION RESPONSIVE MEANS COMPRISING A SWITCH OPERATING TO SHORT OUT SAID CAPACITOR IN RESPONSE TO MOVEMENT OF SAID BODY SO AS TO VARY THE PULSE MODULATING RATE OF SAID MODULATOR ACCORDING TO THE MOTIONAL ACTIVITY OF SAID BODY;
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Current AssigneeGarland J. Mcculloch, Rollin J. Sloan
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Original AssigneeGarland J. Mcculloch, Rollin J. Sloan
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InventorsSloan, Rollin J., Mcculloch, Garland J.
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Application NumberUS04/403,736Time in Patent Office1,035 DaysField of SearchUS Class Current342/386CPC Class CodesA01K 15/021 Electronic training devices...G01S 1/02 using radio waves G01S19/00...
