Patent US4117271A successfully refreshed from Google Patents.
US4117271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inductive communication system
Assignee: United States Department of the Navy
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Filing: 1977-01-10
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Granted: 1978-09-26
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Expires: 1997-01-10
Abstract
Abstract An apparatus providing multiple conversations over limited range. Pseudo-se modulations and specific address coding permit multiple conversations between a base station and several vehicles or between the vehicles. A variable power source gives even greater range control for private communication. By utilizing portable communicators, vehicles can be guided by individuals around the base station.
Inventors
- 👤 Wallis L. Teeter
- 👤 David J. Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:35
CPC Classifications
H; H04; H04B; H04B5/00; H04B5/40; H04B5/48
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
203 words
A communication system between a base station and a plurality of vehicles with a transceiver at the base station and a transceiver in each vehicle comprising: means for initiating voice or data signals within each transceiver; an analog to digital, A/D, converter within each transceiver connected to the output of said voice or data signal initiating means for converting said signals to digital form; means for address encoding within each transceiver connected to said A/D converters for encoding said digital signals as pseudo-noise; a transmitter connected to the output of said A/D converter for transmitting said pseudo-noise encoded digital signals; a receiver within each transceiver for receiving pseudo-noise encoded digital transmissions; means for address decoding said pseudo-noise encoded digital transmissions into digital signals connected to the output of said receiver within each transceiver; a digital to analog, D/A, converter connected to the output of said address decoding means within each transceiver for converting said digital signals to analog signals; means connected to the output of said D/A converter for displaying data signals received from a transceiver; and loop means for inductively coupling said transceivers so as to be capable of two-way voice communication transmissions with said plurality of vehicles and said base station.
Claim 2
Dependent Claim
203 words
A communication system between a base station and a plurality of vehicles with a transceiver at the base station and a transceiver in each vehicle comprising: means for initiating voice or data signals within each transceiver; an analog to digital, A/D, converter within each transceiver connected to the output of said voice or data signal initiating means for converting said signals to digital form; means for address encoding within each transceiver connected to said A/D converters for encoding said digital signals as pseudo-noise; a transmitter connected to the output of said A/D converter for transmitting said pseudo-noise encoded digital signals; a receiver within each transceiver for receiving pseudo-noise encoded digital transmissions; means for address decoding said pseudo-noise encoded digital transmissions into digital signals connected to the output of said receiver within each transceiver; a digital to analog, D/A, converter connected to the output of said address decoding means within each transceiver for converting said digital signals to analog signals; means connected to the output of said D/A converter for displaying data signals received from a transceiver; and loop means for inductively coupling said transceivers so as to be capable of two-way voice communication transmissions with said plurality of vehicles and said base station.
Claim 3
Dependent Claim
18 words
A communications system as described in claim 1 wherein the means for initiating voice transmission is a microphone.
Claim 4
Dependent Claim
18 words
A communication system as described in claim 1 wherein the display means is a cathode ray tube display.
Claim 5
Dependent Claim
16 words
A communication system as described in claim 1 wherein the display means is a digital display.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |