US3860748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catv primary and auxiliary power distribution apparatus
Assignee: Jerrold Electronics Corp
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Filing: 1973-06-20
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Granted: 1975-01-14
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Expires: 1993-06-20
Abstract
Abstract A power distribution arrangement for CATV or like applications includes power supply apparatus for quiescently supplying line amplifier powering 60 Hz line potential to system cabling. Standby batteries, an inverter, and power loss sensing switching apparatus is provided to automatically supply energy at a power rate other than 60 Hz (e.g., 70 Hz) when line voltage is lost. Power frequency sensing and switching circuitry is included at trunk repeater stations which responds to power at the standby, non-60Hz rate by operatively removing power from feeder lines, bridging amplifiers and the like. This reduces battery power drain, thereby extending the continued ability of the main trunk amplifiers to proliferate video throughout the cable system.
Inventors
- 👤 Norman Everhart
- 👤 James Herman
- 👤 William Meise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:43
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/44
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
207 words
In combination in a cable video distribution system, at least one power source means connected to the cable, said power source means including means for quiescently supplying line voltage of standard frequency to said cable, a storage battery, means connected to said battery for generating a standby alternating current potential at a standby power frequency different than said standard frequency, switching means for connecting a selected one of said line voltage or said standby potential to system cabling, and power loss detector means responsive to a loss of line voltage for signalling said switching means to connect the output of said standby potential supplying means to the cable system, further comprising at least one trunk repeater station connected to the cable system, said trunk station comprising a main line amplifier for locally regenerating the video signal on the cable system, a power supply for energizing said main amplifier, a feeder line output port, a power receiving input port, controlled switching means normally connecting said power input port and said feeder line output port, and frequency sensing means responsive to power received by said trunk station at the standby rate for signalling said switching means to operatively disconnect said power input port and said feeder line output port.
Claim 2
Dependent Claim
207 words
In combination in a cable video distribution system, at least one power source means connected to the cable, said power source means including means for quiescently supplying line voltage of standard frequency to said cable, a storage battery, means connected to said battery for generating a standby alternating current potential at a standby power frequency different than said standard frequency, switching means for connecting a selected one of said line voltage or said standby potential to system cabling, and power loss detector means responsive to a loss of line voltage for signalling said switching means to connect the output of said standby potential supplying means to the cable system, further comprising at least one trunk repeater station connected to the cable system, said trunk station comprising a main line amplifier for locally regenerating the video signal on the cable system, a power supply for energizing said main amplifier, a feeder line output port, a power receiving input port, controlled switching means normally connecting said power input port and said feeder line output port, and frequency sensing means responsive to power received by said trunk station at the standby rate for signalling said switching means to operatively disconnect said power input port and said feeder line output port.
Claim 3
Dependent Claim
50 words
A combination as in claim 1, wherein said frequency sensing means comprises first and second filter means respectively tuned to said standard and standby voltage frequencies, a comparator, and first and second signal amplitude detector means connecting the outputs of said first and second filters with inputs of said comparator.
Claim 4
Dependent Claim
42 words
A combination as in claim 1, wherein said trunk station further comprises a bridging amplifier quiescently powered by said power supply, and wherein said switching means includes means for selectively interrupting the energy flow from said power supply to said bridging amplifier.
Claim 5
Dependent Claim
12 words
A combination as in claim 2, wherein said filters comprise active filters.
Claim 6
Dependent Claim
134 words
In combination in a CATV composite line amplifier adapted to amplify video information on a trunk cable connected thereto, said amplifier quiescently receiving AC power via the cable at the standard frequency, and receiving power at a standby frequency distinct from the standard frequency when line power is disabled, said line amplifier comprising a main amplifier for locally regenerating the video signal on the trunk cable, a power supply for energizing said main amplifier, a feeder line output port, a power receiving input port, controlled switching means normally connecting said power input port and said feeder line output port, and frequency sensing means responsive to power received by said composite line amplifier at the standby rate for signalling said switching means to operatively disconnect said power input port and said feeder line output port.
Claim 7
Dependent Claim
134 words
In combination in a CATV composite line amplifier adapted to amplify video information on a trunk cable connected thereto, said amplifier quiescently receiving AC power via the cable at the standard frequency, and receiving power at a standby frequency distinct from the standard frequency when line power is disabled, said line amplifier comprising a main amplifier for locally regenerating the video signal on the trunk cable, a power supply for energizing said main amplifier, a feeder line output port, a power receiving input port, controlled switching means normally connecting said power input port and said feeder line output port, and frequency sensing means responsive to power received by said composite line amplifier at the standby rate for signalling said switching means to operatively disconnect said power input port and said feeder line output port.
Claim 8
Dependent Claim
43 words
A combination as in claim 5, wherein said composite line amplifier further comprises a bridging amplifier quiescently powered by said power supply, and wherein said switching means includes means for selectively interrupting the energy flow from said power supply to said bridging amplifier.
Claim 9
Dependent Claim
50 words
A combination as in claim 5, wherein said frequency sensing meAns comprises first and second filter means respectively tuned to said standard and standby voltage frequencies, a comparator, and first and second signal amplitude detector means connecting the outputs of said first and second filters with inputs of said comparator.
Claim 10
Dependent Claim
12 words
A combination as in claim 7, wherein said filters comprise active filters.
References Cited (Backward Citations)
US2003967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |