Master signal generator with allied servant units to detect range between the master signal transmitter and the allied servant units
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United States of America Patent
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N/A
Issued Date -
Dec 9, 2004
app pub date -
Jun 3, 2003
filing date -
Jun 3, 2003
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A combined radio transmitter/receiver apparatus for determining a particular distance between a transmitter and a receiver. The master transmitter unit sends a radio signal to a servant receiver. The servant receiver has a signal receiver which requires no amplification. When a signal is received from the master transmitter, it generates a current activating a comparator, which then triggers a return signal from a transmitter in the servant unit powered by a shielded battery unit. The master transmitter is set to respond either to receipt of a return signal or failure to receive a return signal. In some applications, the master transmitter will sound a warning to a user when there is no receipts of a returned signal. In other applications, the master transmitter will sound a warning to a user when there is receipt of a return signal. Through the use of tuned antennas in the master transmitter and coded return signals, false alarms and false positives are avoided.
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Cited Art Landscape
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