Patent US3197173A successfully refreshed from Google Patents.
US4191966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
CATV block converter
Assignee: RCA Corp
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Filing: 1978-10-02
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Granted: 1980-03-04
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Expires: 1998-10-02
Abstract
Abstract A converter that is capable of handling all 35 CATV channels without a separate tuning means. The standard VHF channels 2 through 13 on the cable are passed through to the TV set's VHF tuner and the remaining channels are block upconverted to the UHF frequencies to be received on a standard television UHF tuner.
Inventors
- 👤 John L. Ovnick, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:32
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
A cable TV converter for converting the cable TV midband channel frequencies of 120 to 174 MHz and the superband channel frequencies of 216 to 300 MHz to conventional TV tuner frequencies comprising: filtering means responsive to said midband and superband cable channel frequencies for separating said midband and superband channel frequencies, first upconverting means coupled to said filtering means and responsive to said midband signals for upconverting all of said midband channel frequencies by a same fixed frequency to a first block of UHF TV tuner channel frequencies, second upconverting means coupled to said filtering means responsive to said superband channel frequencies for upconverting all of said superband channel frequencies by a same fixed frequency to a second block of different UHF TV tuner channel frequencies, and means coupled to said first and second upconverting means for combining said UHF channel frequencies.
Claim 2
Dependent Claim
143 words
A cable TV converter for converting the cable TV midband channel frequencies of 120 to 174 MHz and the superband channel frequencies of 216 to 300 MHz to conventional TV tuner frequencies comprising: filtering means responsive to said midband and superband cable channel frequencies for separating said midband and superband channel frequencies, first upconverting means coupled to said filtering means and responsive to said midband signals for upconverting all of said midband channel frequencies by a same fixed frequency to a first block of UHF TV tuner channel frequencies, second upconverting means coupled to said filtering means responsive to said superband channel frequencies for upconverting all of said superband channel frequencies by a same fixed frequency to a second block of different UHF TV tuner channel frequencies, and means coupled to said first and second upconverting means for combining said UHF channel frequencies.
Claim 3
Dependent Claim
43 words
The combination of claim 1 wherein said second upconverting means upconverts said superband signals so that the lowest frequency of said second block UHF frequencies is at least 90 MHz above the highest frequency of said first block of UHF tuner channel frequencies.
Claim 4
Dependent Claim
20 words
The combination of claim 2 wherein each of said first and second upconverting means includes a fixed frequency local oscillator.
Claim 5
Dependent Claim
23 words
The combination of claim 3 wherein a first of said oscillators operates at 368 MHz and the second oscillator operates at 416 MHz.
Claim 6
Dependent Claim
203 words
A cable TV converter for providing all of the cable TV frequencies including the midband cable channels A through I and the superband cable channels J through W to standard TV receiver channels having VHF and UHF tuners comprising: means responsive to incoming signals at all channels for equally power dividing said signals to provide first and second power divided output signals, means including an amplifier for coupling said first power divided signals to a first output terminal adapted to be coupled to a TV VHF tuner, diplexer means responsive to said second power divided signals for separating said midband channel frequencies and said superband channel frequencies, first upconverting means coupled to said diplexer means and responsive to said midband channel frequencies for upconverting all of said midband channel frequencies by a same fixed frequency to lower channel UHF TV frequencies, second upconverting means coupled to said diplexer and responsive to said superband channel frequencies for upconverting all of said superband channel frequencies by a same fixed frequency to upper UHF TV channel frequencies, and means coupled to said first and second upconverting means for combining said UHF channel frequencies to a common terminal adapted to be coupled to a UHF TV tuner.
Claim 7
Dependent Claim
203 words
A cable TV converter for providing all of the cable TV frequencies including the midband cable channels A through I and the superband cable channels J through W to standard TV receiver channels having VHF and UHF tuners comprising: means responsive to incoming signals at all channels for equally power dividing said signals to provide first and second power divided output signals, means including an amplifier for coupling said first power divided signals to a first output terminal adapted to be coupled to a TV VHF tuner, diplexer means responsive to said second power divided signals for separating said midband channel frequencies and said superband channel frequencies, first upconverting means coupled to said diplexer means and responsive to said midband channel frequencies for upconverting all of said midband channel frequencies by a same fixed frequency to lower channel UHF TV frequencies, second upconverting means coupled to said diplexer and responsive to said superband channel frequencies for upconverting all of said superband channel frequencies by a same fixed frequency to upper UHF TV channel frequencies, and means coupled to said first and second upconverting means for combining said UHF channel frequencies to a common terminal adapted to be coupled to a UHF TV tuner.
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) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |