US3882266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for converting selected channels
Assignee: OCI Communcations Inc
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Filing: 1973-01-11
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Granted: 1975-05-06
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Expires: 1993-01-11
Abstract
Abstract A cable television converter which converts less than all of the plurality of channels available at its input and thus selectively provides less than all of the available channels of programming to a TV set.
Inventors
- 👤 Eugene C Walding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:07
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/16
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
140 words
A cable TV converter including an input band pass filter tuned to pass a plurality of contiguous TV channels, a first mixer connected to said filter, and a first oscillator connected to said first mixer, an intermediate band pass filter connected to the output of said first mixer, said intermediate filter having generally the same band width as said first filter, a second mixer connected to the ouput of said intermediate filter and a second oscillator connected to said second mixer, and an output band pass filter connected to said second mixer and having a band width the same as said input and intermediate band pass filters, said first oscillator having a frequency such that less than all of said plurality of TV channels present at the output of said first mixer are passed by said intermediate band pass filter.
Claim 2
Dependent Claim
140 words
A cable TV converter including an input band pass filter tuned to pass a plurality of contiguous TV channels, a first mixer connected to said filter, and a first oscillator connected to said first mixer, an intermediate band pass filter connected to the output of said first mixer, said intermediate filter having generally the same band width as said first filter, a second mixer connected to the ouput of said intermediate filter and a second oscillator connected to said second mixer, and an output band pass filter connected to said second mixer and having a band width the same as said input and intermediate band pass filters, said first oscillator having a frequency such that less than all of said plurality of TV channels present at the output of said first mixer are passed by said intermediate band pass filter.
Claim 3
Dependent Claim
45 words
The cable TV converter of claim 1 further characterized in that the frequency of said first oscillator is such that only a single channel of the plurality of channels present at the output of the first mixer are passed by the intermediate band pass filter.
Claim 4
Dependent Claim
40 words
The cable TV converter of claim 2 further characterized in that the frequency of the first oscillator is such that the highest channel present at the output of the first mixer will be passed by the intermediate band pass filter.
Claim 5
Dependent Claim
41 words
The cable TV converter of claim 2 further characterized in that the frequency of the first oscillator is such that only the lowest channel present at the output of the first mixer will be passed by the intermediate band pass filter.
Claim 6
Dependent Claim
18 words
The cable TV converter of claim 1 further characterized in that said second oscillator has a fixed frequency.
Claim 7
Dependent Claim
27 words
The cable TV converter of claim 1 further characterized in that the output of said second mixer is a frequency band usable in a conventional Tv set.
Claim 8
Dependent Claim
141 words
A cable TV converter including an input band pass filter tuned to pass a plurality of contiguous TV channels, a first mixer connected to said filter, and a first oscillator connected to said first mixer, an intermediate band pass filter connected to the output of said first mixer, said intermediate filter having generally the same band width as said first filter, a second mixer connected to the output of said intermediate filter and a second oscillator connected to said second mixer, and an output band pass filter connected to said second mixer and having a band width the same as said input and intermediate band pass filters, one of said oscillators having a frequency such that less than all of said plurality of TV channels present at the output of its associated mixer are passed by the following band pass filter.
Claim 9
Dependent Claim
141 words
A cable TV converter including an input band pass filter tuned to pass a plurality of contiguous TV channels, a first mixer connected to said filter, and a first oscillator connected to said first mixer, an intermediate band pass filter connected to the output of said first mixer, said intermediate filter having generally the same band width as said first filter, a second mixer connected to the output of said intermediate filter and a second oscillator connected to said second mixer, and an output band pass filter connected to said second mixer and having a band width the same as said input and intermediate band pass filters, one of said oscillators having a frequency such that less than all of said plurality of TV channels present at the output of its associated mixer are passed by the following band pass filter.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |