US3671675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency communication system
Assignee: Individual
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Filing: 1969-06-17
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Granted: 1972-06-20
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Expires: 1989-06-17
Abstract
Abstract A panel consisting of two dielectric sheets on opposite sides of a thin metallic layer, sandwiched between two grounded metal plates, serves for the conveying of messages between several transmitting and receiving stations operating on different carrier frequencies. A station can be plugged in, for transmission or reception, at virtually any location along the panel by insertion of a probe through the proximal dielectric sheet; communication is thus possible between stations on either side of the panel.
Inventors
- 👤 Thomas I Ress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:12
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/50
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
183 words
A communication system comprising a panel formed from dielectric sheet means, a thin conductive layer on said sheet means, and a grounded metal plate disposed parallel to said layer alongside said sheet means and separated thereby from said layer; at least one transmitting station having an output circuit connected across said layer and said plate, said output circuit including a first lead traversing said sheet means for conductive contact with said layer at a first point; and at least one receiving station having an input circuit connected across said layer and said plate, said input circuit including a second lead traversing said sheet means for conductive contact with said layer at a second point remote from said first point; said transmitting and receiving stations being provided with modulating and demodulating means operation on at least one carrier frequency; said panel having a main portion of substantially uniform cross-section and a marginal zone of progressively varying cross-section with a series conductance tapering toward the panel edge, the width of said zone being at least equal to a Quarter wavelength of the lowest carrier frequency.
Claim 2
Dependent Claim
183 words
A communication system comprising a panel formed from dielectric sheet means, a thin conductive layer on said sheet means, and a grounded metal plate disposed parallel to said layer alongside said sheet means and separated thereby from said layer; at least one transmitting station having an output circuit connected across said layer and said plate, said output circuit including a first lead traversing said sheet means for conductive contact with said layer at a first point; and at least one receiving station having an input circuit connected across said layer and said plate, said input circuit including a second lead traversing said sheet means for conductive contact with said layer at a second point remote from said first point; said transmitting and receiving stations being provided with modulating and demodulating means operation on at least one carrier frequency; said panel having a main portion of substantially uniform cross-section and a marginal zone of progressively varying cross-section with a series conductance tapering toward the panel edge, the width of said zone being at least equal to a Quarter wavelength of the lowest carrier frequency.
Claim 3
Dependent Claim
35 words
A communication system as defined in claim 1 wherein said sheet means comprises a first sheet between said layer and said plate and a second sheet on the side of said layer opposite said plate.
Claim 4
Dependent Claim
27 words
A communication system as defined in claim 2 wherein said panel further includes a second grounded metal plate extending parallel to said layer alongside said second sheet.
Claim 5
Dependent Claim
39 words
A communication system as defined in claim 2 wherein said panel further includes a nonconductive, rigid backing strip between said sheets carrying said conductive layer adjacent said first sheet and a second, substantially identical layer adjacent said second sheet.
Claim 6
Dependent Claim
21 words
A communication system as defined in claim 1 wherein said leads are parts of probes removably inserted in said sheet means.
Claim 7
Dependent Claim
31 words
A communication system as defined in claim 1 wherein the thickness of said layer decreases progressively by at least one order of magnitude toward the panel edge throughout said marginal zone.
Claim 8
Dependent Claim
26 words
A communication system as defined in claim 1 wherein said layer is formed with generally triangular indentations bounded by exponentially curved flanks throughout said marginal zone.
Claim 9
Dependent Claim
41 words
A communication system as defined in claim 1, further comprising at least one other receiving station having an input lead traversing said sheet means for conductive contact with said layer at a third point remote from said first and second points.
Claim 10
Dependent Claim
38 words
A communication system as defined in claim 8 wherein said receiving stations have demodulating means operating on different carrier frequencies, said transmitting station having switchover means for selectively tuning said modulating means to either of said carrier frequencies.
Claim 11
Dependent Claim
48 words
A communication system as defined in claim 1, further comprising oscillator means connected across said layer and said plate, for transmitting at least one pilot frequency along said layer, said modulating and demodulating means including circuitry for deriving from said pilot frequency a carrier frequency harmonically related thereto.
Claim 12
Dependent Claim
16 words
A communication system as defined in claim 1 wherein said conductive layer consists of ferromagnetic material.
Claim 13
Dependent Claim
174 words
A communication system comprising a panel formed from a pair of dielectric sheets, nonconductive rigid backing plate between said sheets, a pair of substantially identical thin conductive layers on opposite sides of said backing plate adjacent said sheets, and a grounded metal plate disposed parallel to said layers alongside one of said sheets and separated thereby from said backing plate and said layers; at least one transmitting station having an output circuit connected across one of said layers and said metal plate, said output circuit including a first lead traversing one of said sheets for conductive contact with said one of said layers at a first point; and at least one receiving station having an input circuit connected across one of said layers and said metal plate, said input circuit including a second lead traversing one of said sheets for conductive contact with the last-mentioned layer at a second point remote from said first point; said transmitting and receiving stations being provided with modulating and demodulating means operating on at least one carrier frequency.
Claim 14
Dependent Claim
174 words
A communication system comprising a panel formed from a pair of dielectric sheets, nonconductive rigid backing plate between said sheets, a pair of substantially identical thin conductive layers on opposite sides of said backing plate adjacent said sheets, and a grounded metal plate disposed parallel to said layers alongside one of said sheets and separated thereby from said backing plate and said layers; at least one transmitting station having an output circuit connected across one of said layers and said metal plate, said output circuit including a first lead traversing one of said sheets for conductive contact with said one of said layers at a first point; and at least one receiving station having an input circuit connected across one of said layers and said metal plate, said input circuit including a second lead traversing one of said sheets for conductive contact with the last-mentioned layer at a second point remote from said first point; said transmitting and receiving stations being provided with modulating and demodulating means operating on at least one carrier frequency.
References Cited (Backward Citations)
US2790029A
Cited
US3401469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |