US3673590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device to detect motion
Assignee: CORVONICS CORP
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Filing: 1969-10-08
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Granted: 1972-06-27
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Expires: 1989-10-08
Abstract
Abstract A motion detector in which an oscillator-detector transmits a series of narrow bursts of radio frequency, electromagnetic energy, the period of which varies as a function of the radial motion of the object relative to the detector, and the varying pulse frequency provides information that an object is moving radially. Such a detector in which the varying pulse frequency of the oscillator-detector is converted to a varying D.C. voltage the magnitude of which varies at a rate determined by the rate of movement of the object, the varying voltage effecting energization of an alarm.
Inventors
- 👤 Joseph A Corvi
- 👤 William G Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:33
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/52; G01S13/56
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
125 words
In a motion detector, self-pulsing oscillator-detector means for transmitting short bursts of a field of radiofrequency electromagnetic energy and for detecting changes in the periodicity of the pulses caused by movement of an object in the field, said self-pulsing oscillator-detector comprises a transistor, antenna means connected to the base of said transmitter, a source of current, a radiofrequency ground capacitor connected to the collector of said transistor, an output conductor connected to the base of said transistor, and a resistor and a capacitor in said output conductor, whereby said means emits output pulses at a variable frequency determined by the motion of the object and responds to the variation of the periodicity of said output pulses to provide information indicative of motion of the object.
Claim 2
Dependent Claim
125 words
In a motion detector, self-pulsing oscillator-detector means for transmitting short bursts of a field of radiofrequency electromagnetic energy and for detecting changes in the periodicity of the pulses caused by movement of an object in the field, said self-pulsing oscillator-detector comprises a transistor, antenna means connected to the base of said transmitter, a source of current, a radiofrequency ground capacitor connected to the collector of said transistor, an output conductor connected to the base of said transistor, and a resistor and a capacitor in said output conductor, whereby said means emits output pulses at a variable frequency determined by the motion of the object and responds to the variation of the periodicity of said output pulses to provide information indicative of motion of the object.
Claim 3
Dependent Claim
49 words
A motion detector as defined in claim 1 wherein said last-mentioned means comprises a frequency discriminator for converting the output pulse frequency of said self-pulsing oscillator-detector means to a varying D.C. voltage the magnitude of which varies at a rate determined by the rate of motion of the object.
Claim 4
Dependent Claim
124 words
In a motion detector, a self-pulsing oscillator-detector means for transmitting short bursts of a field of radiofrequency electromagnetic energy and detecting return energy, said self-pulsing oscillator-detector means including means for emitting output pulses at a frequency determined by the frequency of the returned energy, and means operatively connected to said oscillator-detector means and operable for indicating movement of an object in said field in response to variaTions in the frequency of said output pulses, said self-pulsing oscillator-detector comprising a transistor, antenna means connected to the base of said transmitter, a source of current, a radiofrequency ground capacitor connected to the collector of said transistor, an output conductor connected to the base of said transistor, and a resistor and a capacitor in said output conductor.
Claim 5
Dependent Claim
124 words
In a motion detector, a self-pulsing oscillator-detector means for transmitting short bursts of a field of radiofrequency electromagnetic energy and detecting return energy, said self-pulsing oscillator-detector means including means for emitting output pulses at a frequency determined by the frequency of the returned energy, and means operatively connected to said oscillator-detector means and operable for indicating movement of an object in said field in response to variaTions in the frequency of said output pulses, said self-pulsing oscillator-detector comprising a transistor, antenna means connected to the base of said transmitter, a source of current, a radiofrequency ground capacitor connected to the collector of said transistor, an output conductor connected to the base of said transistor, and a resistor and a capacitor in said output conductor.
Claim 6
Dependent Claim
65 words
A motion detector as defined in claim 3, comprising frequency discriminator means connected to the output of said self-pulsing oscillator-detector to receive said pulses and convert the pulse frequency to a D.C. voltage output the magnitude of which is determined by said pulses, and means responsive to the output from frequency discriminator for effecting operation of said means operatively connected to said self-pulsing oscillator-detector means.
Claim 7
Dependent Claim
78 words
A motion detector as defined in claim 3 comprising frequency discriminator means connected to the output of said self-pulsing oscillator-detector to receive said pulses and convert the pulse frequency to a D.C. voltage output the magnitude of which is determined by said pulses, said means operatively connected to said self-pulsing oscillator-detector means, and means including an amplifier responsive to the output from said frequency discriminator for effecting operation of said means operatively connected to said self-pulsing oscillator-detector means.
Claim 8
Dependent Claim
88 words
A motion detector defined in claim 3 comprising frequency discriminator means connected to the output of said self-pulsing oscillator-detector to receive said pulses and convert the pulse frequency to a D.C. voltage output the magnitude of which is determined by said pulses, means including a trigger circuit responsive to the output from said frequency discriminator, and counter means responsive to signals from said trigger circuit for effecting operation of said means operatively connected to said self-pulsing oscillator-detector means only in response to a plurality of said trigger signals.
Claim 9
Dependent Claim
108 words
A motion detector as defined in claim 3 comprising frequency discriminator means connected to the output of said self-pulsing oscillator-detector to receive said pulses and convert the pulse frequency to a D.C. voltage output the magnitude of which is determined by said pulses, means including a trigger circuit responsive to the output from said frequency discriminator, counter means responsive to signals from said trigger circuit to produce an output signal only in response to a plurality of said trigger signals, and a further trigger circuit for effecting operation of said means operatively connected to said self-pulsing oscillator-detector means in response to said output signal from said counter means.
Claim 10
Dependent Claim
20 words
A motion detector as defined in claim 7 wherein said means operatively connected to said self-pulsing oscillator-detector comprises an alarm.
Claim 11
Dependent Claim
19 words
A motion detector as defined in claim 7 wherein means operatively connected to said self-pulsing oscillator-detector comprises an alarm.
Claim 12
Dependent Claim
19 words
A motion detector as defined in claim 3, including a capacitor connecting the emitter of said transistor to ground.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |