US3582970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rocket and jet engine detector
Assignee: SCOPE ACQUISITION CORP A DE CORP
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Filing: 1968-06-19
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Granted: 1971-06-01
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Expires: 1988-06-19
Abstract
Abstract A rocket and jet engine detector for investigating the amplitude modulation of the infrared energy produced by the engines including an infrared detector, a high-pass filter for rejecting amplitude modulation at frequencies below about 500 Hz. and a threshold trigger coupled to the filter for providing an output signal.
Inventors
- 👤 Richard E Williams
- 👤 Julian A Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:33
CPC Classifications
G; G02; G02F; G02F2/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
81 words
A rocket and jet engine detector comprising means for detecting the amplitude modulation of the infrared energy produced by said engine, filter means coupled to the output of said detecting means for rejecting that component of said output signal below a predetermined frequency of about 500 Hz. so as to eliminate the modulation of said signal by atmospheric turbulence, threshold trigger means coupLed to the output of said filter means, and indicating means coupled to the output of said trigger means.
Claim 2
Dependent Claim
81 words
A rocket and jet engine detector comprising means for detecting the amplitude modulation of the infrared energy produced by said engine, filter means coupled to the output of said detecting means for rejecting that component of said output signal below a predetermined frequency of about 500 Hz. so as to eliminate the modulation of said signal by atmospheric turbulence, threshold trigger means coupLed to the output of said filter means, and indicating means coupled to the output of said trigger means.
Claim 3
Independent Claim
81 words
A device for detecting the amplitude modulated infrared radiation produced by jet and rocket engines comprising infrared radiation detecting means for providing an output signal generated by said amplitude modulated radiation, filter means coupled to the output of said detecting means for rejecting that component of said amplitude modulated radiation below a predetermined frequency of about 500 Hz. so as to eliminate the modulation of said signal by atmospheric turbulence, and indicator means coupled to the output of said filter means.
Claim 4
Independent Claim
81 words
A device for detecting the amplitude modulated infrared radiation produced by jet and rocket engines comprising infrared radiation detecting means for providing an output signal generated by said amplitude modulated radiation, filter means coupled to the output of said detecting means for rejecting that component of said amplitude modulated radiation below a predetermined frequency of about 500 Hz. so as to eliminate the modulation of said signal by atmospheric turbulence, and indicator means coupled to the output of said filter means.
Claim 5
Dependent Claim
17 words
The device of claim 2 wherein said indicating means comprises a threshold trigger, and a signal indicator.
Claim 6
Independent Claim
67 words
A method of monitoring the amplitude modulated infrared energy produced by jet and rocket engines which consists of detecting said amplitude modulated infrared energy, filtering said detected amplitude modulated infrared energy so as to reject said modulated energy below a predetermined frequency of about 500 Hz. so as to eliminate the modulation of said signal by atmospheric turbulence, and providing a signal indicative of said filtered energy.
Claim 7
Independent Claim
67 words
A method of monitoring the amplitude modulated infrared energy produced by jet and rocket engines which consists of detecting said amplitude modulated infrared energy, filtering said detected amplitude modulated infrared energy so as to reject said modulated energy below a predetermined frequency of about 500 Hz. so as to eliminate the modulation of said signal by atmospheric turbulence, and providing a signal indicative of said filtered energy.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |