Communications: electrical – Condition responsive indicating system – With particular coupling link
Patent
1994-02-25
1995-10-03
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular coupling link
340572, 34082549, 348734, G08B 108
Patent
active
054555604
ABSTRACT:
A locating device for locating a remote control device which is capable of controlling an electronic device, the electronic device being stationary and the remote control device being capable of controlling the electronic device from a remote location, is disclosed. The locating device comprises a transmitter portion incorporated with the electronic device and a receiver portion which is located within the remote control device. The transmitter portion comprises circuitry for transmitting a signal. The receiver portion comprises a first oscillator circuit which is adapted to oscillate when the transmitted signal is at the design center frequency of the first oscillator circuit. The receiver portion further comprises a second oscillator circuit which is adapted to begin oscillation after the first oscillator circuit begins to oscillate. The signal from the second oscillator circuit is amplified and provided to an audio oscillator circuit. A method of coding the signals is also disclosed.
REFERENCES:
patent: 4101873 (1978-07-01), Anderson et al.
patent: 4476469 (1984-10-01), Lander
patent: 5294915 (1994-03-01), Owen
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