Patent US3906366A successfully refreshed from Google Patents.
US3906366A
Expired / Lapsed
US
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Remote control system
Assignee: Panasonic Holdings Corp
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Filing: 1973-12-10
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Granted: 1975-09-16
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Expires: 1993-12-10
Abstract
Abstract A remote control system is disclosed which may gradually control a device or vary a control signal through a non-mechanical oscillation transmission system. The transmitter comprises a high-frequency oscillator, an astable multivibrator adapted to modulate the output of the high-frequency oscillator, and an element adapted to transmit the modulated output signal. The output of the element may be varied by varying the ratio of the pulse width to the pulse period of the output pulses of the astable multivibrator. The high-frequency oscillator is adapted to oscillate at a predetermined frequency which may be arbitrarily selected depending upon the device to be controlled. A receiver can discriminate the received signal so that a device to be controlled by the received signal may be detected and controlled. The discriminated signal is shaped in waveform by a wave-shaping circuit so that a DC voltage whose magnitude is the product of the amplitude of the shaped output signal and the aforesaid ratio of the output pulses of the astable oscillator, is produced to control the intended device.
Inventors
- 👤 Shunji Minami
- 👤 Takehide Takemura
- 👤 Shunzo Oka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:25
CPC Classifications
H; H04; H04Q; H04Q9/00; H04B; H04B1/00; H04B1/06; H04B1/16; H04B10/00; H04B10/50; H04Q9/14
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
147 words
A remote control system comprising A. a transmitter comprising a. a high-frequency oscillator having a selectively variable oscillation frequency; b. means for varying the power output of said high-frequency oscillator as a continuous function; and c. means for transmitting the output of said high-frequency oscillator; and B. a receiver comprising d. means for receiving said transmitted output from said transmitter; e. means for discriminating the received signal depending upon the frequency; f. means for shaping the discriminated signal into a series of pulses wherein the ratio of the pulse width to the pulse period thereof corresponds to the power of the transmitted signal; and g. means connected to said shaping means for providing a voltage having an amplitude proportional to the product of the ratio of the pulse width to The pulse period of the output of said shaping means and the amplitude of the shaped signal.
Claim 2
Dependent Claim
147 words
A remote control system comprising A. a transmitter comprising a. a high-frequency oscillator having a selectively variable oscillation frequency; b. means for varying the power output of said high-frequency oscillator as a continuous function; and c. means for transmitting the output of said high-frequency oscillator; and B. a receiver comprising d. means for receiving said transmitted output from said transmitter; e. means for discriminating the received signal depending upon the frequency; f. means for shaping the discriminated signal into a series of pulses wherein the ratio of the pulse width to the pulse period thereof corresponds to the power of the transmitted signal; and g. means connected to said shaping means for providing a voltage having an amplitude proportional to the product of the ratio of the pulse width to The pulse period of the output of said shaping means and the amplitude of the shaped signal.
Claim 3
Dependent Claim
17 words
A remote control system as defined in claim 1 wherein said modulating means comprises amplitude modulating means.
Claim 4
Dependent Claim
137 words
A remote control system as defined in claim 1 wherein a. said modulating means comprises pulse train generating means; and b. said means for providing a voltage in proportion to said ratio and the amplitude of said shaped signal comprises a secondary of a transformer directly coupled to said wave-shaping means, a resistor, a neon bulb, and a base of a MOS field-effect transistor interconnected in series in the order named from said secondary of said transformer, a high-frequency oscillator connected to the output of said wave-shaping circuit through an integrator and to the primary of said transformer so as to supply the high frequency to said secondary of said transformer, a capacitor interconnected between the base of said field-effect transistor and the ground, and a resistor connected between the source of said transistor and the ground.
Claim 5
Dependent Claim
19 words
A remote control system as defined in claim 1 wherein said transmitting means comprises means for transmitting electromagnetic waves.
Claim 6
Dependent Claim
18 words
A remote control system as defined in claim 1 wherein said transmitting means comprises means for transmitting sound.
Claim 7
Dependent Claim
21 words
A remote control system as defined in claim 1 wherein said transmitting means comprises means for transmitting an oscillating magnetic field.
Claim 8
Dependent Claim
25 words
The remote control system of claim 1, wherein said transmitter comprises means for transmitting the output of the high frequency oscillator with a rectangular waveform.
Claim 9
Dependent Claim
122 words
A remote control system comprising a transmitter and a receiver, said transmitter comprising means for transmitting pulses of oscillations of selectively variable frequency and pulse width to pulse period ratios that are selectively variable as a continuous function, said receiver comprising means for receiving the transmitted output from the transmitter, means for discriminating the received signals depending upon the frequency of the oscillations thereof, means for shaping the discriminated signals to produce pulse signals corresponding to the transmitted signals, and means connected to said shaping means for producing a voltage having an amplitude proportional to the product of the ratio of the pulse width to the pulse period of the output of the shaping means and the amplitude of the shaped signal.
Claim 10
Dependent Claim
122 words
A remote control system comprising a transmitter and a receiver, said transmitter comprising means for transmitting pulses of oscillations of selectively variable frequency and pulse width to pulse period ratios that are selectively variable as a continuous function, said receiver comprising means for receiving the transmitted output from the transmitter, means for discriminating the received signals depending upon the frequency of the oscillations thereof, means for shaping the discriminated signals to produce pulse signals corresponding to the transmitted signals, and means connected to said shaping means for producing a voltage having an amplitude proportional to the product of the ratio of the pulse width to the pulse period of the output of the shaping means and the amplitude of the shaped signal.
Claim 11
Dependent Claim
77 words
The remote control system of claim 8, wherein said means for transmitting pulses comprises an oscillator, means for selectively varying the frequency of oscillations of said oscillator, means generating a pulse train of pulses, means for varying the ratio of the pulse width to the pulse period of the pulses of said pulse train as a continuous function, means for modulating the oscillations of said oscillator with said pulse train, and means for transmitting the modulated oscillations.
Claim 12
Dependent Claim
105 words
The remote control system of claim 8, wherein said means connected to said shaping means comprises a source of operating potential having first and second terminals, a field effect transistor having a drain electrode connected to said first terminal, a first resistor connected between the source electrode and said second terminal, a storage capacitor connected between the gate of said transistor and said second terminal, switching means, a second resistor and a threshold conducting device connected in series between the output of said shaping means and said gate electrode, and means for operating said switching means in response to an output from said shaping means.
Claim 13
Dependent Claim
15 words
The remote control system of claim 10, wherein said threshold means comprises a neon tube.
Claim 14
Dependent Claim
58 words
The remote control system of claim 11, wherein said switching means comprises a transformer having a first winding connected in series in the output of said shaping means and a second winding, a high frequency oscillator connected to sAid second winding, and means for activating said high frequency oscillator in response to output signals from said shaping means.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |