US3746991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote control communications system
Assignee: Individual
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Filing: 1970-07-15
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Granted: 1973-07-17
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Expires: 1990-07-15
Abstract
Abstract A transmitter, which remotely controls the demuting of a normally muted radio receiver, derives a command signal from a carrier wave, the command signal having a frequency or a duration which is precisely related to the frequency of the carrier wave. The receiver derives a reference signal from the received carrier wave, having a frequency which is a predetermined fraction of the frequency of the carrier wave, detects the command signal, and compares a time parameter of the command signal (either its frequency or duration) with the frequency of the reference signal. If a predetermined relationship exists, a control signal is provided for controlling a muting/demuting circuit in the receiver. Selective addressing of a particular receiver may be effected by providing the transmitter with means for deriving a plurality of command signals, each having a different time parameter corresponding to a particular receiver, and selective keying means for selecting one of the command signals for transmission. The carrier wave may be a pilot carrier which, in turn, modulates a main carrier wave of the transmitter.
Inventors
- 👤 G Gautney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:52
CPC Classifications
G; G08; G08B; G08B27/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
151 words
A communications system, comprising: a transmitter and a remote receiver; said transmitter including a source of a carrier wave, means to derive a command signal from said carrier wave having a time parameter having a fixed relationship with the frequency of said carrier wave, means to modulate said carrier wave with said command signal, and means to transmit the modulated carrier wave; and said receiver including means to receive said modulated carrier wave, means to derive a reference signal from said received carrier wave having a time parameter which is a function of the frequency of said received carrier wave, means to detect said command signal modulated on said received carrier wave, comparison means for comparing said time parameters of said detected command signal and said reference signal and for providing a control signal in response to a predetermined relationship between said time parameters, and apparatus controlled by said control signal.
Claim 2
Dependent Claim
151 words
A communications system, comprising: a transmitter and a remote receiver; said transmitter including a source of a carrier wave, means to derive a command signal from said carrier wave having a time parameter having a fixed relationship with the frequency of said carrier wave, means to modulate said carrier wave with said command signal, and means to transmit the modulated carrier wave; and said receiver including means to receive said modulated carrier wave, means to derive a reference signal from said received carrier wave having a time parameter which is a function of the frequency of said received carrier wave, means to detect said command signal modulated on said received carrier wave, comparison means for comparing said time parameters of said detected command signal and said reference signal and for providing a control signal in response to a predetermined relationship between said time parameters, and apparatus controlled by said control signal.
Claim 3
Dependent Claim
39 words
A communications system as recited in claim 1, said system being a muting/demuting system and said receiver including means for muting an output from said receiver and responsive to said control signal for demuting said output from said receiver.
Claim 4
Dependent Claim
36 words
A communications system as recited in claim 2, wherein said transmitter includes means for transmitting an intelligence signal and said receiver includes means for detecting said intelligence signal and providing said intelligence signal as said output.
Claim 5
Dependent Claim
54 words
A communications system as recited in claim 1, wherein said means to derive a command signal comprises frequency divider means for providing a command signal having a frequency which is a predetermiNed fraction of the frequency of said carrier wave, said frequency of said command signal being said time parameter of said command signal.
Claim 6
Dependent Claim
26 words
A communications system as recited in claim 4, wherein said means to derive said command signal further comprises keying means for selectively providing said command signal.
Claim 7
Dependent Claim
38 words
A communications system as recited in claim 4, wherein said comparison means comprises means for deriving a timing signal from said detected command signal the duration of which is a function of the frequency of said command signal.
Claim 8
Dependent Claim
76 words
A communications system as recited in claim 1, wherein said means to derive a command signal comprises means for providing a command signal which is a predetermined fraction of the frequency of said carrier wave, and wherein said comparison means includes a frequency multiplier for multiplying said command signal by the inverse of said predetermined fraction and phase comparison means for comparing the phase of said carrier wave and the output signal from said frequency multiplier.
Claim 9
Dependent Claim
98 words
A communications system as recited in claim 1, wherein said means to derive a command signal is adapted to derive a plurality of command signals from said carrier wave, each having a different time parameter, and comprises selective keying means to transmit a selected command signal, and wherein said system comprises a plurality of remote receivers, the comparison means in each of said receivers being adapted to provide a control signal in response to the reception of a particular one of said command signals, whereby only receivers responsive to the selected command signal will provide a control signal.
Claim 10
Dependent Claim
71 words
A communications system as recited in claim 1, wherein said carrier wave is a pilot carrier wave, wherein said transmitter comprises a source of a main carrier wave, said main carrier wave being modulated by said pilot carrier wave after said pilot carrier wave is modulated by said command signal, and wherein said receiver comprises means to receive said modulated main carrier wave and to detect said modulated pilot carrier wave.
Claim 11
Dependent Claim
29 words
A communications system as recited in claim 1, wherein said receiver comprises hold means for maintaining said control signal for a time interval following cessation of said command signal.
Claim 12
Dependent Claim
139 words
A carrier wave receiver, comprising: means for receiving a carrier wave modulated by a command signal having a time parameter having a fixed relationship with the frequency of said carrier wave; means to derive a reference signal from said received carrier wave having a time parameter which is a function of the frequency of said received carrier wave; means to detect said command signal modulated on said received carrier wave; comparison means for comparing said time parameters of said detected command signal and said reference signal and for providing a control signal in response to a predetermined relationship between said time parameters; and apparatus having at least two states and including means for effecting one of said states when said control signal is provided and for effecting the other of said states in the absence of said control signal.
Claim 13
Dependent Claim
139 words
A carrier wave receiver, comprising: means for receiving a carrier wave modulated by a command signal having a time parameter having a fixed relationship with the frequency of said carrier wave; means to derive a reference signal from said received carrier wave having a time parameter which is a function of the frequency of said received carrier wave; means to detect said command signal modulated on said received carrier wave; comparison means for comparing said time parameters of said detected command signal and said reference signal and for providing a control signal in response to a predetermined relationship between said time parameters; and apparatus having at least two states and including means for effecting one of said states when said control signal is provided and for effecting the other of said states in the absence of said control signal.
Claim 14
Dependent Claim
31 words
A carrier wave receiver as recited in claim 11, wherein said apparatus comprises means for muting an output from said receiver and responsive to said control signal for demuting said output.
Claim 15
Dependent Claim
29 words
A carrier wave receiver as recited in claim 12, further comprising means for detecting an intelligence signal modulated on said carrier wave, said detected intelligence signal comprising said output.
Claim 16
Dependent Claim
190 words
A transmitter for remotely controlling a remote receiver comprising: a source of a carrier wave; means to derive a command signal from said carrier wave having a time parameter having a fixed relationship with the frequency of said carrier wave; means to modulate said carrier wave with said command signal; means to transmit the modulated carrier wave; and means to transmit an intelligence signaL; wherein said means to derive a command signal comprises frequency divider means for providing a command signal having a frequency which is a predetermined fraction of the frequency of said carrier wave; and further comprising a receiver of said carrier wave, means for deriving said command signal from said carrier wave, means for multiplying the frequency of said command signal by the inverse of said predetermined fraction, means for comparing the phases of said carrier wave and the output signal from said means for multiplying to produce an output signal when the phases of said signals bear a predetermined phase relationship to one another and means responsive to an output signal from said phase comparator for a specified length of time for performing a predetermined function.
Claim 17
Dependent Claim
190 words
A transmitter for remotely controlling a remote receiver comprising: a source of a carrier wave; means to derive a command signal from said carrier wave having a time parameter having a fixed relationship with the frequency of said carrier wave; means to modulate said carrier wave with said command signal; means to transmit the modulated carrier wave; and means to transmit an intelligence signaL; wherein said means to derive a command signal comprises frequency divider means for providing a command signal having a frequency which is a predetermined fraction of the frequency of said carrier wave; and further comprising a receiver of said carrier wave, means for deriving said command signal from said carrier wave, means for multiplying the frequency of said command signal by the inverse of said predetermined fraction, means for comparing the phases of said carrier wave and the output signal from said means for multiplying to produce an output signal when the phases of said signals bear a predetermined phase relationship to one another and means responsive to an output signal from said phase comparator for a specified length of time for performing a predetermined function.
Claim 18
Dependent Claim
100 words
A transmitter for remotely controlling a remote receiver comprising: a source of a carrier wave; means to derive a command signal from said carrier wave having a time parameter having a fixed relationship with the frequency of said carrier wave; means to modulate said carrier wave with said command signal; and means to transmit the modulated carrier wave; wherein said means to derive a command signal derives a plurality of command signals from said carrier wave, each having a different time parameter, and comprises selector means for selecting a particular command signal for transmission for controlling a particular remote receiver.
Claim 19
Dependent Claim
100 words
A transmitter for remotely controlling a remote receiver comprising: a source of a carrier wave; means to derive a command signal from said carrier wave having a time parameter having a fixed relationship with the frequency of said carrier wave; means to modulate said carrier wave with said command signal; and means to transmit the modulated carrier wave; wherein said means to derive a command signal derives a plurality of command signals from said carrier wave, each having a different time parameter, and comprises selector means for selecting a particular command signal for transmission for controlling a particular remote receiver.
Claim 20
Dependent Claim
98 words
The combination according to claim 15 further comprising a receiver for receiving the transmitted modulated carrier wave, said receiver comprising: means to derive a reference signal from said received carrier wave having a time parameter which is a function of the frequency of said received carrier wave, means to detect said command signal modulated on said received carrier wave, comparison means for comparing said time parameters of said detected command signal and said reference signal and for providing a control signal in response to a predetermined relationship between said time parameters, and apparatus controlled by said control signal.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |