Patent US3920932A successfully refreshed from Google Patents.
US3920932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coaxial cable including line repeaters for broadband signals
Assignee: US Philips Corp
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Filing: 1974-08-20
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Granted: 1975-11-18
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Expires: 1994-08-20
Abstract
Abstract A coaxial cable comprising line repeaters, tubular ferromagnetic members coaxially mounted on the inner conductor to create electrical interruptions in the mechanically uninterrupted cable, and coupling means between the electrically interrupted portions of the cable and the line repeaters.
Inventors
- 👤 Engel Roza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:13
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/36; H01; H01B; H01B11/00; H01B11/18; H01B11/1895
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
122 words
A coaxial cable comprising: an inner conductor and an outer conductor; at least one line repeater having a pair of input and output terminals, said repeater being located in a cable section between said inner and outer conductor; a tubular ferromagnetic element coaxially mounted on and electromagnetically coupled to said inner conductor in front of said line repeater to provide, without a mechanical interruption of the inner conductor, an anterior electrical interruption for a broad frequency band of signals transmitted through the cable; and first means to couple the signal occuring in a cable section before said anterior electrical interruption to the input terminals of said line repeater, whereby the output terminals are coupled to a cable section behind said electrical interruption.
Claim 2
Dependent Claim
122 words
A coaxial cable comprising: an inner conductor and an outer conductor; at least one line repeater having a pair of input and output terminals, said repeater being located in a cable section between said inner and outer conductor; a tubular ferromagnetic element coaxially mounted on and electromagnetically coupled to said inner conductor in front of said line repeater to provide, without a mechanical interruption of the inner conductor, an anterior electrical interruption for a broad frequency band of signals transmitted through the cable; and first means to couple the signal occuring in a cable section before said anterior electrical interruption to the input terminals of said line repeater, whereby the output terminals are coupled to a cable section behind said electrical interruption.
Claim 3
Dependent Claim
69 words
A coaxial cable as claimed in claim 1, wherein an additional, tubular ferromagnetic element is coaxially mounted on and electromagnetically coupled to said inner conductor immediately behind said line repeater to provide a posterior electrical interruption in the path of the signal, and second means to couple the signal occuring at the output terminals of said line repeater to a portion of said cable behind said posterior electrical interruption.
Claim 4
Dependent Claim
39 words
A coaxial cable as claimed in claim 2, further comprising a capacitor having one electrode connected to the part of said inner conductor between said anterior and posterior electrical interruptions, and the other electrode connected to said outer conductor.
Claim 5
Dependent Claim
24 words
A coaxial cable as claimed in claim 3, wherein the ferromagnetic elements providing said anterior and posterior electrical interruptions have mutually different magnetic permeabilities.
Claim 6
Dependent Claim
25 words
A coaxial cable as claimed in claim 2, wherein said first and second coupling means include conductors having resilient ends abutting against said inner conductor.
Claim 7
Dependent Claim
45 words
A coaxial cable as claimed in claim 3, further including a tubular support member of an insulating material coaxially mounted on said inner conductor between said first and second ferromagnetIc elements, said support member having recesses for accomodating said line repeater and said capacitor, respectively.
Claim 8
Dependent Claim
34 words
A coaxial cable as claimed in claim 2, wherein said first and second coupling means include at least one coil inductively coupled to the magnetic field of at least one of said ferromagnetic elements.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |