US3821559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for electric installations
Assignee: Mitsubishi Electric Corp
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Filing: 1973-01-02
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Granted: 1974-06-28
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Expires: 1993-01-02
Abstract
Abstract In the disclosed system a 3-bit binary coded signal having eight words each corresponding to one of eight switches and control signals corresponding to those switches in their ''''ON'''' and developed in response to the binary coded signals are represented by amplitude varying currents wherein different frequencies correspond to different bits of the binary coded signal. The binary coded signals and the control signals are delivered via a single transmission line to eight receivers connected to respective electric devices. In each receiver the signals are restored to their original forms and a binary coded signal corresponding to an associated switch is decoded and applied along with the control signal resulting from that switch, being closed, to a driving circuit for enabling an associated electric device. Only those binary coded signals assigned to closed switches are delivered to the receivers.
Inventors
- 👤 A Ueda
- 👤 M Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:10
CPC Classifications
G; G08; G08C; G08C15/00; B; B60; B60R; B60R16/00; B60R16/02; B60R16/03; B60R16/0315
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
282 words
A control system for controlling a plurality of electrically powered devices in a vehicle comprising: a. a transmitter comprising means for developing a periodic first signal sequence of signals corresponding to a periodic sequence of consecutive n-bit binary numbers, control circuit means having a plurality of control switches each corresponding to a different n-bit binary number and operable to an open and a closed condition, means defining a plurality of signal paths for applying said first signals to said control means for developing control signals in synchronism with the signals in said first signal sequence corresponding to n-bit binary numbers for which the corresponding switches are closed, frequency encoding circuit means receptive of the first sequence of signals for providing in response thereto a second signal sequence comprising a periodic sequence of signals corresponding to a periodic sequence of consecutive n-bit binary numbers wherein each of the n-bits is represented by a different frequency, output circuit means receptive of the second signal sequence and the control signals for providing a transmitter output signal comprising a sequence of superpositions of frequencies representing each of the n-bit binary numbers represented by the first signal sequence and corresponding control signals corresponding to a closed state of the corresponding control switches; b. an output signal path receptive of the transmitter output signal and disposed throughout the vehicle; and c. a plurality of receivers connected to said output signal path wherein each receiver comprises, means responsive to a combination of frequencies corresponding to a specific n-bit binary number and the corresponding control signals for providing a signal in response thereto; and means receptive of the last-mentioned signal for enabling a corresponding electrically powered device in response thereto.
Claim 2
Dependent Claim
282 words
A control system for controlling a plurality of electrically powered devices in a vehicle comprising: a. a transmitter comprising means for developing a periodic first signal sequence of signals corresponding to a periodic sequence of consecutive n-bit binary numbers, control circuit means having a plurality of control switches each corresponding to a different n-bit binary number and operable to an open and a closed condition, means defining a plurality of signal paths for applying said first signals to said control means for developing control signals in synchronism with the signals in said first signal sequence corresponding to n-bit binary numbers for which the corresponding switches are closed, frequency encoding circuit means receptive of the first sequence of signals for providing in response thereto a second signal sequence comprising a periodic sequence of signals corresponding to a periodic sequence of consecutive n-bit binary numbers wherein each of the n-bits is represented by a different frequency, output circuit means receptive of the second signal sequence and the control signals for providing a transmitter output signal comprising a sequence of superpositions of frequencies representing each of the n-bit binary numbers represented by the first signal sequence and corresponding control signals corresponding to a closed state of the corresponding control switches; b. an output signal path receptive of the transmitter output signal and disposed throughout the vehicle; and c. a plurality of receivers connected to said output signal path wherein each receiver comprises, means responsive to a combination of frequencies corresponding to a specific n-bit binary number and the corresponding control signals for providing a signal in response thereto; and means receptive of the last-mentioned signal for enabling a corresponding electrically powered device in response thereto.
Claim 3
Dependent Claim
77 words
In a control system for controlling a pluraLity of electrically powered devices in a vehicle according to claim 1 wherein said means for developing the first signal sequence comprises: a. a clock circuit for developing a periodic sequence of clock pulses; and b. an n-bit counter receptive of the clock pulses for counting the clock pulses and providing the first signal sequence of signals representative of a periodic sequence of consecutive n-bit binary numbers in response thereto.
Claim 4
Dependent Claim
154 words
In a control system for controlling a plurality of electrically powered devices in a vehicle according to claim 1 wherein said control means comprises: a. a decoder receptive of the first signal sequence for providing 2n sampling pulses in response thereto wherein each sampling pulse corresponds to a different n-bit binary number and is developed in response to each first signal of the first signal sequence corresponding to that n-bit binary number; b. a control signal generator connected to said control switches and receptive of the sampling pulses for generating a control pulse in response to a sampling pulse corresponding to an n-bit binary number for which the corresponding control switch is closed; c. a control oscillator developing an output signal; and d. an AND gate receptive of the control oscillator output signal and control pulses for gating the control oscillator output signal in response to the control pulses to provide a control signal.
Claim 5
Dependent Claim
111 words
In a control system for controlling a plurality of electrically powered devices in a vehicle according to claim 3 wherein said frequency encoding circuit means for providing the second signal sequence comprises: a. n oscillators each having a different output signal frequency from said control oscillator and from each other; and b. n AND gates each receptive of an output signal from a different one of said n oscillators and a portion of the first signal sequence representative of a different one of the n-bits wherein the AND gates gate the oscillator output signals to provide the second signal sequence wherein each of the n-bits are represented by a different frequency.
Claim 6
Dependent Claim
117 words
In a control system for controlling a plurality of electrically powered devices in a vehicle according to claim 1 wherein said control means comprises: a. a decoder receptive of the first signal sequence for providding 2n sampling pulses in response thereto wherein each sampling pulse corresponds to a different n-bit binary number and is developed in response to each first signal of the first signal sequence corresponding to that n-bit binary number; and b. a control signal generator connected to said control switches and receptive of the sampling pulses for generating the control signals in response to the sampling pulses corresponding to the n-bit binary numbers for which the corresponding control switches are in a closed state.
Claim 7
Dependent Claim
72 words
In a control system for controlling a plurality of electrically powered devices in a vehicle according to claim 11 wherein said output circuit means comprises an OR gate receptive of the second signal sequence from said n AND gates and the control signals for providing the transmitter output signal containing the superposition of the frequencies representing each of the n-bit binary numbers represented by the first signal sequence and corresponding control signals.
Claim 8
Dependent Claim
93 words
In a control system for controlling a plurality of electrically powered devices in a vehicle according to claim 4 wherein said output circuit means comprises: a. an OR gate receptive of the second signal sequence from said n AND gates for providing an output signal comprising a superposition of the n AND gate signal frequencies; and b. an AND gate receptive of said OR gate output signal and receptive of the control signals for gating the OR gate output signal in response to the received control signals to provide the transmitter Output signal.
Claim 9
Dependent Claim
214 words
In a control system for controlling a plurality of electrically powered devices in a vehicle according to claim 1 wherein said means responsive to a combination of frequencies corresponding to a specific n-bit binary number and a corresponding control signal comprises: a. n frequency selectors each receptive of the transmitter output signal and responsive to a different one of the frequencies of the second signal sequence for developing n output signals each comprising a different one of the frequencies of the second signal sequence representative of one of the n-bits; b. n converters each receptive of an output signal from a corresponding one of said n frequency selectors for providing in response thereto output signals corresponding to the first signal sequence; c. a decoder receptive of the n converter output signals and responsive to a combination of said converter output signals representative of a specific n-bit binary number for developing an output signal in response thereto; d. control signal decoding means receptive of the transmitter output signal for developing output signals in response to the control signals superposed with the transmitter output signal; and e. an AND gate receptive of the decoder output signal and a control signal decoding means output signal for providing an output signal in response to reception of both simultaneously.
Claim 10
Dependent Claim
156 words
In a control system for controlling a plurality of electrically powered devices in a vehicle according to claim 1 wherein said means responsive to a combination of frequencies corresponding to a specific n-bit binary number and a control signal comprises: a. n frequency selectors each receptive of the transmitter output signal and responsive to a different one of the frequencies of the second signal sequence for developing n output signals each comprising a different one of the frequencies of the second signal sequence representative of one of the n-bits; b. n converters each receptive of an output signal from a corresponding one of said n frequency selectors for providing in response thereto output signals corresponding to the first signal sequence; and c. a decoder receptive of the n converter output signals and responsive to a combination of said converter output signals representative of a specific n-bit binary number for developing an output signal in response thereto.
Claim 11
Dependent Claim
28 words
In a control system for controlling a plurality of electrically powered devices in a vehicle according to claim 1 wherein said output signal path comprises a single conductor.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |