Patent US3248653A successfully refreshed from Google Patents.
US3248653A
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Band folding frequency conversion system
Assignee: Lockheed Martin Corp
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Filing: 1962-01-23
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Granted: 1966-04-26
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Expires: 1982-01-23
Abstract
No abstract record available.
Inventors
- 👤 William D Gabor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:46
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A BAND FOLDING SYSTEM COMPRISING: FIRST AND SECOND SIGNAL CHANNELS; MEANS FOR APPLYING SIGNALS FROM A BAND OF FREQUENCIES TO THE INPUTS OF THE FIRST AND SECOND CHANNELS; EACH SIGNAL CHANNEL HAVING A GENERATOR FOR PRODUCING SIMULTANEOUSLY A SPECTRUM OF LINE FREQUENCIES COVERING THE BAND BEING MONITORED AND HAVING A MIXER FOR HETERODYNING THE OUTPUT OF THE GENERATOR WITH THE SIGNALS APPLIED TO THE CHANNEL''S INPUT; MEANS IN THE SIGNAL CHANNELS FOR CAUSING THE SPECTRUM OF LINE FREQUENCIES GENERATED IN ONE SIGNAL CHANNEL TO BE DISPLACED IN FREQUENCY FROM AND INTERLEAVED WITH THE SPECTRUM OF LINE FREQUENCIES GENERATED IN THE OTHER SIGNAL CHANNEL; MEANS FOR ADDITIVELY COMBINING THE OUTPUTS OF THE TWO SIGNAL CHANNELS, AND FILTER MEANS CONNECTED TO FILTER THE HETERODYNED SIGNALS DEVELOPED IN EACH CHANNEL, THE INTERVAL BETWEEN ADJACENT LINE FREQUENCIES BEING AT LEAST TWICE AS GREAT AS THE BANDWIDTH OF SAID FILTER MEANS.
Claim 2
Dependent Claim
146 words
A BAND FOLDING SYSTEM COMPRISING: FIRST AND SECOND SIGNAL CHANNELS; MEANS FOR APPLYING SIGNALS FROM A BAND OF FREQUENCIES TO THE INPUTS OF THE FIRST AND SECOND CHANNELS; EACH SIGNAL CHANNEL HAVING A GENERATOR FOR PRODUCING SIMULTANEOUSLY A SPECTRUM OF LINE FREQUENCIES COVERING THE BAND BEING MONITORED AND HAVING A MIXER FOR HETERODYNING THE OUTPUT OF THE GENERATOR WITH THE SIGNALS APPLIED TO THE CHANNEL''S INPUT; MEANS IN THE SIGNAL CHANNELS FOR CAUSING THE SPECTRUM OF LINE FREQUENCIES GENERATED IN ONE SIGNAL CHANNEL TO BE DISPLACED IN FREQUENCY FROM AND INTERLEAVED WITH THE SPECTRUM OF LINE FREQUENCIES GENERATED IN THE OTHER SIGNAL CHANNEL; MEANS FOR ADDITIVELY COMBINING THE OUTPUTS OF THE TWO SIGNAL CHANNELS, AND FILTER MEANS CONNECTED TO FILTER THE HETERODYNED SIGNALS DEVELOPED IN EACH CHANNEL, THE INTERVAL BETWEEN ADJACENT LINE FREQUENCIES BEING AT LEAST TWICE AS GREAT AS THE BANDWIDTH OF SAID FILTER MEANS.
References Cited (Backward Citations)
US2954465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |