Patent US3614035A successfully refreshed from Google Patents.
US3614035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Change detector
Assignee: Lockheed Martin Tactical Systems Inc
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Filing: 1964-02-10
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Granted: 1971-10-19
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Expires: 1984-02-10
Abstract
Abstract 1. In a target change detector adapted for combination with a reconnaissance aircraft, the combination of a reference transparent scene film, a film drive means, a cathode-ray tube adapted to scan the total area of the transparent film with nominal raster technique, a photomultiplier adapted to receive the scanning beam of the cathode-ray tube through the transparent film, lens means to properly direct the scanning beam of the cathode-ray tube to the transparent film and to the photomultiplier to produce video signals, a vidicon adapted to electronically image a comparison scene of the earth beneath the aircraft and produce video signals, a pair of wide-band electronic amplifiers adapted to receive the video signals from the vidicon and the photomultiplier respectively, the amplifier for the vidicon being set for a positive output signal, the amplifier for the photomultiplier being set for a negative output signal, a summer unit adapted to receive the video signals of opposite polarity from the amplifiers to produce a difference signal, said difference signal being the difference between the reference transparent film signal and the comparison vidicon signal, a comparison guidance system section adapted to compare the vidicon image with the film image to keep the aircraft flying on the proper course, switch means between the vidicon and its amplifier, said switch adapted to switch the vidicon signal to the cathode-ray tube input, switch means between the photomultiplier and its amplifier, said second-mentioned switch adapted to shift the photomultiplier signal to the comparison guidance system and means to change the switches synchronously together to change the apparatus from the change detector section to the comparison guidance system.
Inventors
- 👤 George R Buynak
- 👤 Nicholas D Diamantides
- 👤 Richard H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:33
CPC Classifications
F; F41; F41G; F41G7/00; F41G7/34; F41G7/343
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
269 words
In a target change detector adapted for combination with a reconnaissance aircraft, the combination of a reference transparent scene film, a film drive means, a cathode-ray tube adapted to scan the total area of the transparent film with normal raster technique, a photomultiplier adapted to receive the scanning beam of the cathode-ray tube through the transparent film, lens means to properly direct the scanning beam of the cathode-ray tube to the transparent film and to the photomultiplier to produce video signals, a vidicon adapted to electronically image a comparison scene of the earth beneath the aircraft and produce video signals, a pair of wide-band electronic amplifiers adapted to receive the video signals from the vidicon and the photomultiplier respectively, the amplifier for the vidicon being set for a positive outpuT signal, the amplifier for the photomultiplier being set for a negative output signal, a summer unit adapted to receive the video signals of opposite polarity from the amplifiers to produce a difference signal, said difference signal being the difference between the reference transparent film signal and the comparison vidicon signal, a comparison guidance system section adapted to compare the vidicon image with the film image to keep the aircraft flying on the proper course, switch means between the vidicon and its amplifier, said switch adapted to switch the vidicon signal to the cathode-ray tube input, switch means between the photomultiplier and its amplifier, said second-mentioned switch adapted to shift the photomultiplier signal to the comparison guidance system and means to change the switches synchronously together to change the apparatus from the change detector section to the comparison guidance system.
Claim 2
Dependent Claim
269 words
In a target change detector adapted for combination with a reconnaissance aircraft, the combination of a reference transparent scene film, a film drive means, a cathode-ray tube adapted to scan the total area of the transparent film with normal raster technique, a photomultiplier adapted to receive the scanning beam of the cathode-ray tube through the transparent film, lens means to properly direct the scanning beam of the cathode-ray tube to the transparent film and to the photomultiplier to produce video signals, a vidicon adapted to electronically image a comparison scene of the earth beneath the aircraft and produce video signals, a pair of wide-band electronic amplifiers adapted to receive the video signals from the vidicon and the photomultiplier respectively, the amplifier for the vidicon being set for a positive outpuT signal, the amplifier for the photomultiplier being set for a negative output signal, a summer unit adapted to receive the video signals of opposite polarity from the amplifiers to produce a difference signal, said difference signal being the difference between the reference transparent film signal and the comparison vidicon signal, a comparison guidance system section adapted to compare the vidicon image with the film image to keep the aircraft flying on the proper course, switch means between the vidicon and its amplifier, said switch adapted to switch the vidicon signal to the cathode-ray tube input, switch means between the photomultiplier and its amplifier, said second-mentioned switch adapted to shift the photomultiplier signal to the comparison guidance system and means to change the switches synchronously together to change the apparatus from the change detector section to the comparison guidance system.
Claim 3
Dependent Claim
233 words
In a target change detector adapted for combination with a reconnaissance aircraft, the combination of a reference scene, a cathode-ray tube adapted to scan the scene, a photomultiplier adapted to receive the scanning beam of the cathode-ray tube to produce video signals, means to electronically image a comparison scene of the earth beneath the aircraft and produce video signals, a pair of wide-band electronic amplifiers adapted to receive the video signals from the electronic image means and the photomultiplier respectively, the amplifier for the electronic image means being set for a positive output signal, the amplifier for the photomultiplier being set for a negative output signal, a summer unit adapted to receive the video signals of opposite polarity from the amplifiers to produce a difference signal, said difference signal being the difference between the reference scene and the comparison electronic image signal, a comparison guidance system section adapted to compare the electronic image with the scene to keep the aircraft flying on the proper course, switch means between the electronic image means and its amplifier, said switch adapted to switch the electronic image signal to the cathode-ray tube input, switch means between the photomultiplier and its amplifier, said second-mentioned switch adapted to shift the photomultiplier signal to the comparison guidance system and means to change the switches synchronously together to change the apparatus from the change detector section to the comparison guidance system.
Claim 4
Dependent Claim
233 words
In a target change detector adapted for combination with a reconnaissance aircraft, the combination of a reference scene, a cathode-ray tube adapted to scan the scene, a photomultiplier adapted to receive the scanning beam of the cathode-ray tube to produce video signals, means to electronically image a comparison scene of the earth beneath the aircraft and produce video signals, a pair of wide-band electronic amplifiers adapted to receive the video signals from the electronic image means and the photomultiplier respectively, the amplifier for the electronic image means being set for a positive output signal, the amplifier for the photomultiplier being set for a negative output signal, a summer unit adapted to receive the video signals of opposite polarity from the amplifiers to produce a difference signal, said difference signal being the difference between the reference scene and the comparison electronic image signal, a comparison guidance system section adapted to compare the electronic image with the scene to keep the aircraft flying on the proper course, switch means between the electronic image means and its amplifier, said switch adapted to switch the electronic image signal to the cathode-ray tube input, switch means between the photomultiplier and its amplifier, said second-mentioned switch adapted to shift the photomultiplier signal to the comparison guidance system and means to change the switches synchronously together to change the apparatus from the change detector section to the comparison guidance system.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |