Patent US3761929A successfully refreshed from Google Patents.
US3761929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radar spoof
Assignee: United States Department of the Navy
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Filing: 1971-02-24
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Granted: 1973-09-25
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Expires: 1991-02-24
Abstract
Abstract A method and preferred means for utilizing a heat thrust engine exhaust to ignite and distribute a combustible mixture rich in ionizable material, thereby producing an engine exhaust capable of confusing radar or infrared tracking systems. More particularly, a slurry typically composed of a hydrocarbon fuel and an ionizable substance is injected into the tailpipe section of an aircraft to produce an engine exhaust having a radar and infrared return greater than that of the aircraft, thereby decoying the unfriendly detection or tracking system away from the aircraft and allowing the aircraft to undertake evasive action to avoid the weaponry associated with the detection or tracking system.
Inventors
- 👤 T Wyatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:44
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/14; H01Q15/145; F; F41; F41H; F41H11/00; F41H11/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
99 words
A method for producing a false radar return initially in the vicinity of an aircraft which produces a high temperature exhaust and subsequently a distance from said aircraft, comprising the steps of spraying a first combustible mixture including a first combustible fuel component and a first ionizable material into the exhaust, discontinuing the spraying of said first combustible mixture into said exhaust, and injecting in the form of a continuous stream a second combustible mixture comprising a second combustible fuel component and a second ionizable material into the exhaust subsequently to the exit of said exhaust from the aircraft.
Claim 2
Independent Claim
99 words
A method for producing a false radar return initially in the vicinity of an aircraft which produces a high temperature exhaust and subsequently a distance from said aircraft, comprising the steps of spraying a first combustible mixture including a first combustible fuel component and a first ionizable material into the exhaust, discontinuing the spraying of said first combustible mixture into said exhaust, and injecting in the form of a continuous stream a second combustible mixture comprising a second combustible fuel component and a second ionizable material into the exhaust subsequently to the exit of said exhaust from the aircraft.
Claim 3
Dependent Claim
59 words
The method of claim 1 wherein said first and second combustible mixtures comprise slurries consisting of (by weight): a. powdered aluminum 30 percent b. powdered magnesium 10 percent c. gasoline (unleaded) 55 percent d. cesium soap selected from the group consisting of cesium stearate, cesium oleate, or cesium palmitate 5 percent and e. thorium and cerium in trace amounts.
Claim 4
Independent Claim
99 words
A method for producing an electron population in a high-temperature gaseous exhaust from an engine, the electron population being of sufficient density and duration to reflect a radar signal, the method comprising the step of injecting a combustible mixture into the exhaust after said exhaust is emitted from the engine, the combustible mixture comprising a slurry consisting of (by weight): a. powdered aluminum 30 percent b. powdered magnesium 10 percent c. gasoline (unleaded) 55 percent d. cesium soap selected from the group consisting of cesium oleate or cesium palmitate 5 percent and, e. thorium and cerium in trace amounts.
Claim 5
Independent Claim
99 words
A method for producing an electron population in a high-temperature gaseous exhaust from an engine, the electron population being of sufficient density and duration to reflect a radar signal, the method comprising the step of injecting a combustible mixture into the exhaust after said exhaust is emitted from the engine, the combustible mixture comprising a slurry consisting of (by weight): a. powdered aluminum 30 percent b. powdered magnesium 10 percent c. gasoline (unleaded) 55 percent d. cesium soap selected from the group consisting of cesium oleate or cesium palmitate 5 percent and, e. thorium and cerium in trace amounts.
Claim 6
Dependent Claim
116 words
In an aircraft which expels a high-temperature gaseous exhaust, means for producing and distributing a radar reflective exhaust therefrom, comprising, a combustible slurry consisting of (by weight): a. powdered aluminum 30% b. powdered magnesium 10% c. gasoline (unleaded) 55% d. cesium soap selected from the group consisting of cesium oleate or cesium palmitate 5% and, e. thorium and cerium in trace amounts; nozzle means for injecting said slurry into the exhaust; thermostatically controlled storage means for holding and heating said mixture prior to injection of the slurry into the exhaust; pressurized means for maintaining pressure in said storage means; and control means for controlling the amount of the combustible slurry to be injected into the exhaust.
Claim 7
Dependent Claim
116 words
In an aircraft which expels a high-temperature gaseous exhaust, means for producing and distributing a radar reflective exhaust therefrom, comprising, a combustible slurry consisting of (by weight): a. powdered aluminum 30% b. powdered magnesium 10% c. gasoline (unleaded) 55% d. cesium soap selected from the group consisting of cesium oleate or cesium palmitate 5% and, e. thorium and cerium in trace amounts; nozzle means for injecting said slurry into the exhaust; thermostatically controlled storage means for holding and heating said mixture prior to injection of the slurry into the exhaust; pressurized means for maintaining pressure in said storage means; and control means for controlling the amount of the combustible slurry to be injected into the exhaust.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |