US3879709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking system using radio wave
Assignee: Individual
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Filing: 1972-08-09
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Granted: 1975-04-22
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Expires: 1992-08-09
Abstract
Abstract A locking system using radio waves. The system is made up of a transmitting means having a low frequency oscillation circuit with a mechanical filter circuit and an instantaneous starting circuit, an amplification circuit, a half-wave rectifying and a rectangular wave rectifying circuit for a low frequency generated by said low frequency oscillation circuit, and a high frequency oscillation circuit operated interruptedly by a rectified rectangular wave from said half-wave rectifying and rectangular wave rectifying circuit. A receiving means receives electric wave energy radiated from said transmitting means, said receiving means including a frequency detection circuit with a filter circuit to permit a narrow range of high frequency and low frequency to pass, and a mechanical filter circuit having a peak value forming circuit for amplifying and attenuating a peak value of the detected output from said frequency detection circuit to make the value of said detected output constant. The lastmentioned mechanical filter circuit further has an integral circuit. The output signal for operating a locking mechanism is obtained through a rectifying circuit for the output of the lastmentioned filter circuit and a DC amplication circuit with a delay circuit.
Inventors
- 👤 Hiroyuki Yukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:39
CPC Classifications
G; G07; G07C; G07C9/00; G07C9/00174; G07C9/00182; G07C2009/00753; G07C2009/00769; G07C2009/00793
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
318 words
A locking system using radio waves, comprising: a transmitting means comprised of a low frequency oscillation circuit including a first mechanical filter circuit and an instantaneous starting circuit coupled to said mechanical filter circuit, said instantaneous starting circuit comprised of a capacitor and two resistors connected, seriatim, in series, the junction of said resistors coupled to the input of said mechanical filter circuit, an amplifying circuit coupled to the the output of said low frequency oscillation circuit, a half-wave rectifying circuit for rectifying a low frequency signal generated by said low frequency oscillation circuit and coupled thereto, means operatively coupled to said half-wave rectifying circuit for producing a rectangular output wave, and high frequency oscillation means operatively coupled to said reCtangular output wave means and operated interruptedly by a rectified rectangular wave therefrom; and receiving means for receiving an electric signal transmitted from said transmitting means, said receiving means comprised of a frequency detection circuit having a filter circuit for passing only a narrow range of high frequency and low frequency signals, a second mechanical filter circuit, a peak value forming circuit for amplifying and attenuating a peak value of the detected output from said frequency detection circuit and coupled thereto in order to provide a constant output therefrom, an integral circuit coupled to said frequency detection circuit and second mechanical filter, said integral circuit comprised of a variable resistor and a condensor, said second mechanical filter circuit being responsive only to a predetermined integrated signal derived by said integral circuit from one of a sine wave and a rectangular wave having prescribed frequencies and peak values, a rectifying circuit coupled to said mechanical filter, a DC amplifying circuit, a first input of said DC amplifying circuit coupled to said rectifying circuit and a delay circuit coupled to a second input of said DC amplifying circuit, whereby an output signal for operating a locking mechanism can be obtained.
Claim 2
Dependent Claim
318 words
A locking system using radio waves, comprising: a transmitting means comprised of a low frequency oscillation circuit including a first mechanical filter circuit and an instantaneous starting circuit coupled to said mechanical filter circuit, said instantaneous starting circuit comprised of a capacitor and two resistors connected, seriatim, in series, the junction of said resistors coupled to the input of said mechanical filter circuit, an amplifying circuit coupled to the the output of said low frequency oscillation circuit, a half-wave rectifying circuit for rectifying a low frequency signal generated by said low frequency oscillation circuit and coupled thereto, means operatively coupled to said half-wave rectifying circuit for producing a rectangular output wave, and high frequency oscillation means operatively coupled to said reCtangular output wave means and operated interruptedly by a rectified rectangular wave therefrom; and receiving means for receiving an electric signal transmitted from said transmitting means, said receiving means comprised of a frequency detection circuit having a filter circuit for passing only a narrow range of high frequency and low frequency signals, a second mechanical filter circuit, a peak value forming circuit for amplifying and attenuating a peak value of the detected output from said frequency detection circuit and coupled thereto in order to provide a constant output therefrom, an integral circuit coupled to said frequency detection circuit and second mechanical filter, said integral circuit comprised of a variable resistor and a condensor, said second mechanical filter circuit being responsive only to a predetermined integrated signal derived by said integral circuit from one of a sine wave and a rectangular wave having prescribed frequencies and peak values, a rectifying circuit coupled to said mechanical filter, a DC amplifying circuit, a first input of said DC amplifying circuit coupled to said rectifying circuit and a delay circuit coupled to a second input of said DC amplifying circuit, whereby an output signal for operating a locking mechanism can be obtained.
Claim 3
Dependent Claim
318 words
A locking system using radio waves, comprising: a transmitting means comprised of a low frequency oscillation circuit including a first mechanical filter circuit and an instantaneous starting circuit coupled to said mechanical filter circuit, said instantaneous starting circuit comprised of a capacitor and two resistors connected, seriatim, in series, the junction of said resistors coupled to the input of said mechanical filter circuit, an amplifying circuit coupled to the the output of said low frequency oscillation circuit, a half-wave rectifying circuit for rectifying a low frequency signal generated by said low frequency oscillation circuit and coupled thereto, means operatively coupled to said half-wave rectifying circuit for producing a rectangular output wave, and high frequency oscillation means operatively coupled to said reCtangular output wave means and operated interruptedly by a rectified rectangular wave therefrom; and receiving means for receiving an electric signal transmitted from said transmitting means, said receiving means comprised of a frequency detection circuit having a filter circuit for passing only a narrow range of high frequency and low frequency signals, a second mechanical filter circuit, a peak value forming circuit for amplifying and attenuating a peak value of the detected output from said frequency detection circuit and coupled thereto in order to provide a constant output therefrom, an integral circuit coupled to said frequency detection circuit and second mechanical filter, said integral circuit comprised of a variable resistor and a condensor, said second mechanical filter circuit being responsive only to a predetermined integrated signal derived by said integral circuit from one of a sine wave and a rectangular wave having prescribed frequencies and peak values, a rectifying circuit coupled to said mechanical filter, a DC amplifying circuit, a first input of said DC amplifying circuit coupled to said rectifying circuit and a delay circuit coupled to a second input of said DC amplifying circuit, whereby an output signal for operating a locking mechanism can be obtained.
Claim 4
Dependent Claim
318 words
A locking system using radio waves, comprising: a transmitting means comprised of a low frequency oscillation circuit including a first mechanical filter circuit and an instantaneous starting circuit coupled to said mechanical filter circuit, said instantaneous starting circuit comprised of a capacitor and two resistors connected, seriatim, in series, the junction of said resistors coupled to the input of said mechanical filter circuit, an amplifying circuit coupled to the the output of said low frequency oscillation circuit, a half-wave rectifying circuit for rectifying a low frequency signal generated by said low frequency oscillation circuit and coupled thereto, means operatively coupled to said half-wave rectifying circuit for producing a rectangular output wave, and high frequency oscillation means operatively coupled to said reCtangular output wave means and operated interruptedly by a rectified rectangular wave therefrom; and receiving means for receiving an electric signal transmitted from said transmitting means, said receiving means comprised of a frequency detection circuit having a filter circuit for passing only a narrow range of high frequency and low frequency signals, a second mechanical filter circuit, a peak value forming circuit for amplifying and attenuating a peak value of the detected output from said frequency detection circuit and coupled thereto in order to provide a constant output therefrom, an integral circuit coupled to said frequency detection circuit and second mechanical filter, said integral circuit comprised of a variable resistor and a condensor, said second mechanical filter circuit being responsive only to a predetermined integrated signal derived by said integral circuit from one of a sine wave and a rectangular wave having prescribed frequencies and peak values, a rectifying circuit coupled to said mechanical filter, a DC amplifying circuit, a first input of said DC amplifying circuit coupled to said rectifying circuit and a delay circuit coupled to a second input of said DC amplifying circuit, whereby an output signal for operating a locking mechanism can be obtained.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |