US3955200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interleaving jamming technique
Assignee: United States Department of the Army
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Filing: 1961-04-06
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Granted: 1976-05-04
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Expires: 1981-04-06
Abstract
Abstract 1. The method for producing radio-frequency signals for jamming the detecs in twin channel type variable-time proximity fuzes comprising the steps of detecting a first radio-frequency signal radiated from said variable-time proximity type fuze within a first prescribed range of frequencies, alternately detecting said first signal and a second radio-frequency signal radiated from said fuze within a second prescribed frequency range, the alternating rate being at a frequency mucn higher than the band-pass of the said variable-time fuze detectors, delaying each of said detected signals a prescribed time in the order that they are detected, sequentially deriving from said delayed detected signals respective radio-frequency signals having frequencies equal to said first and second fuze radiated signals respectively, and alternately transmitting said derived radio frequencies at said alternating rate for a time equal to said delay time to provide interleaved transmitted signals.
Inventors
- 👤 Leon Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:35
CPC Classifications
H; H04; H04K; H04K3/00; H04K3/40; H04K3/46; G; G01; G01S; G01S7/00; G01S7/02; G01S7/38; H04K3/42; H04K3/45
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
140 words
The method for producing radio-frequency signals for jamming the detectors in twin channel type variable-time proximity fuzes comprising the steps of detecting a first radio-frequency signal radiated from said variable-time proximity type fuze within a first prescribed range of frequencies, alternately detecting said first signal and a second radio-frequency signal radiated from said fuze within a second prescribed frequency range, the alternating rate being at a frequency much higher than the band-pass of the said variable-time fuze detectors, delaying each of said detected signals a prescribed time in the order that they are detected, sequentially deriving from said delayed detected signals respective radio-frequency signals have frequencies equal to said first and second fuze radiated signals respectively, and alternately transmitting said derived radio frequencies at said alternating rate for a time equal to said delay time to provide interleaved transmitted signals.
Claim 2
Independent Claim
140 words
The method for producing radio-frequency signals for jamming the detectors in twin channel type variable-time proximity fuzes comprising the steps of detecting a first radio-frequency signal radiated from said variable-time proximity type fuze within a first prescribed range of frequencies, alternately detecting said first signal and a second radio-frequency signal radiated from said fuze within a second prescribed frequency range, the alternating rate being at a frequency much higher than the band-pass of the said variable-time fuze detectors, delaying each of said detected signals a prescribed time in the order that they are detected, sequentially deriving from said delayed detected signals respective radio-frequency signals have frequencies equal to said first and second fuze radiated signals respectively, and alternately transmitting said derived radio frequencies at said alternating rate for a time equal to said delay time to provide interleaved transmitted signals.
Claim 3
Dependent Claim
27 words
The method in accordance with claim 1 wherein said prescribed delay time is 1 millisecond and wherein 40 of said interleaved transmitted signals occur during one millisecond.
Claim 4
Dependent Claim
26 words
The method in accordance with claim 1 wherein the rate of detection is at a frequency of 20 kc. and said delay time is one millisecond.
Claim 5
Independent Claim
170 words
The method for producing radio-frequency signals for jamming detectors in channel type variable-time proximity fuze comprising the steps of detecting a first radio-frequency signal radiated from said fuze within a prescribed range of frequencies, sequentially stepping through successive ranges of frequency of the same scope as said prescribed range for detecting a second radio-frequency signal radiated from said fuze within one of the successive frequency ranges after the detection of said first radio-frequency fuze signal, alternately detecting said first and second radio-frequency signal radiated from said variable-time fuzes at a rate much higher than the band-pass of said fuze detectors, delaying said first and second alternately detected signals a prescribed time in the order that they are detected, deriving from said delayed detected signals respective radio-frequency signals at frequencies equal to said first and second fuze radiated signals, and alternately transmitting said derived radio frequencies at the same rate the fuze radiated signals were alternately detected and for a time equal to said delay time to provide interleaved transmitted signals.
Claim 6
Independent Claim
170 words
The method for producing radio-frequency signals for jamming detectors in channel type variable-time proximity fuze comprising the steps of detecting a first radio-frequency signal radiated from said fuze within a prescribed range of frequencies, sequentially stepping through successive ranges of frequency of the same scope as said prescribed range for detecting a second radio-frequency signal radiated from said fuze within one of the successive frequency ranges after the detection of said first radio-frequency fuze signal, alternately detecting said first and second radio-frequency signal radiated from said variable-time fuzes at a rate much higher than the band-pass of said fuze detectors, delaying said first and second alternately detected signals a prescribed time in the order that they are detected, deriving from said delayed detected signals respective radio-frequency signals at frequencies equal to said first and second fuze radiated signals, and alternately transmitting said derived radio frequencies at the same rate the fuze radiated signals were alternately detected and for a time equal to said delay time to provide interleaved transmitted signals.
Claim 7
Independent Claim
177 words
The method for producing radio-frequency signals for jamming detectors in twin channel type variable-time proximity fuze comprising the steps of detecting a first radio-frequency signal radiated from said fuze within a prescribed range of frequencies, sequentially stepping through successive ranges of the same scope of frequency as said prescribed range for detecting a second radio-frequency signal radiated from said fuze within one of the successive frequency ranges after the detection of said first radio-frequency signal, alternately detecting said first and second radio-frequency signal radiated from said variable-time fuzes at a rate higher than the band-pass of the fuze detectors, delaying said first and second alternately detected signals a prescribed time in the order they are detected, sequentially deriving from said delayed detected signals respective radio-frequency signals at frequencies equal to said first and second fuze radiated signals, interleaving the transmission of said derived radio frequencies at the same rate the fuze radiated signals were alternately detected and simultaneously precluding the reception of further fuze signals, the duration of interleaved transmission being equal to said prescribed delay time.
Claim 8
Independent Claim
177 words
The method for producing radio-frequency signals for jamming detectors in twin channel type variable-time proximity fuze comprising the steps of detecting a first radio-frequency signal radiated from said fuze within a prescribed range of frequencies, sequentially stepping through successive ranges of the same scope of frequency as said prescribed range for detecting a second radio-frequency signal radiated from said fuze within one of the successive frequency ranges after the detection of said first radio-frequency signal, alternately detecting said first and second radio-frequency signal radiated from said variable-time fuzes at a rate higher than the band-pass of the fuze detectors, delaying said first and second alternately detected signals a prescribed time in the order they are detected, sequentially deriving from said delayed detected signals respective radio-frequency signals at frequencies equal to said first and second fuze radiated signals, interleaving the transmission of said derived radio frequencies at the same rate the fuze radiated signals were alternately detected and simultaneously precluding the reception of further fuze signals, the duration of interleaved transmission being equal to said prescribed delay time.
Claim 9
Dependent Claim
24 words
The method in accordance with claim 5 wherein the alternate detecting rate is at 20 kc. and said prescribed delay time is one millisecond.
Claim 10
Dependent Claim
19 words
The method in accordance with claim 1 wherein the duration of signal detection is equal to said delay time.
References Cited (Backward Citations)
US2943318A
Cited
US2910691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |