Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1999-06-01
2000-12-19
Swann, Glen
Communications: electrical
Condition responsive indicating system
Specific condition
119721, 119908, G08B 2100, A01K 1502
Patent
active
061632619
ABSTRACT:
A method of applying at least one of a stimulus and a warning signal to an animal includes selecting a maximum desired distance between the animal and a transmitter, transmitting a radio frequency signal from the transmitter at a first point in time, and receiving the radio frequency signal with a receiver attached to the animal. An ultrasonic frequency signal is transmitted from the transmitter at a second point in time. A first time difference between the second point in time and the first point in time varies inversely with the selected maximum desired distance. The ultrasonic frequency signal is received with the receiver at a third point in time. A second time difference between the third point in time and the first point in time is calculated. It is determined whether the animal is beyond the maximum desired distance from the transmitter by comparing the second time difference with at least one threshold time difference. A stimulus and/or a warning signal is selectively applied to the animal dependent upon the determining step.
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Innotek Pet Products, Inc.
Swann Glen
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