US3631348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal distribution system
Assignee: RCA Licensing Corp
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Filing: 1969-02-19
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Granted: 1971-12-28
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Expires: 1989-02-19
Abstract
Abstract A signal distribution system includes a filter which separates UHF television signals from VHF television and FM radio signals. a tv receiver (VHF tuner) and an FM receiver are each coupled to the filter by a diode. Energization of a desired receiver causes an appropriate diode to be forward biased and electrically connect the filter to the desired receiver.
Inventors
- 👤 William L Lehmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:47
CPC Classifications
H; H03; H03H; H03H2/00; H03H2/005; H03H2/008
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
259 words
A signal distribution system comprising: a source of VHF television and FM radio signals; a source of electrical power; a first signal channel including resonant circuits for processing said VHF television signals, said first channel operable when energized by said source of electrical power and a second signal channel including resonant circuits for processing said FM radio signals, said second signal channel operable when energized by said source of electrical power; filter means coupled to said source of signals and adapted to pass said VHF television and said FM radio signals; electronic switch means for selectively connecting one of said first and said second channels with said filter means, said electronic switch means including a first electronic device coupled between said first channel and said filter and a second electronic device coupled between said second channel and said filter; a switch adapted to interconnect one of said first and said second channels with said source of electrical power to energize said channel; and means interconnecting said electronic switch means with said first and said second channel such that when said first channel is interconnected with said source of electrical power, said first device exhibits a low impedance and said second device exhibits a high impedance which decouples the resonant circuits of said first and said second signal channel, and when said second channel is interconnected with said source of electrical power, said second device exhibits a low impedance and said first device exhibits a high impedance which decouples the resonant circuits of said first and said second signal channel.
Claim 2
Dependent Claim
259 words
A signal distribution system comprising: a source of VHF television and FM radio signals; a source of electrical power; a first signal channel including resonant circuits for processing said VHF television signals, said first channel operable when energized by said source of electrical power and a second signal channel including resonant circuits for processing said FM radio signals, said second signal channel operable when energized by said source of electrical power; filter means coupled to said source of signals and adapted to pass said VHF television and said FM radio signals; electronic switch means for selectively connecting one of said first and said second channels with said filter means, said electronic switch means including a first electronic device coupled between said first channel and said filter and a second electronic device coupled between said second channel and said filter; a switch adapted to interconnect one of said first and said second channels with said source of electrical power to energize said channel; and means interconnecting said electronic switch means with said first and said second channel such that when said first channel is interconnected with said source of electrical power, said first device exhibits a low impedance and said second device exhibits a high impedance which decouples the resonant circuits of said first and said second signal channel, and when said second channel is interconnected with said source of electrical power, said second device exhibits a low impedance and said first device exhibits a high impedance which decouples the resonant circuits of said first and said second signal channel.
Claim 3
Dependent Claim
19 words
A signal splitter system as defined in claim 1 wherein said first and said second electronic devices are diodes.
Claim 4
Dependent Claim
26 words
A signal splitter system as defined in claim 2 wherein said first channel is an FM radio receiver and said second channel is a TV receiver.
Claim 5
Dependent Claim
236 words
A signal distribution system comprising: a source of electrical power; a source of VHF television signals and FM radio signals; a television tuner for processing said VHF television signals and including tunable resonant circuits, said television tuner operable when energized by said source of electrical power; a radio tuner for processing said FM radio signalS and including tunable resonant circuits, said radio tuner operable when energized by said source of electrical power; filter means coupled to said source of signals and adapted to pass said VHF television and FM radio signals; a first electronic switch device coupled between said filter and said television tuner; a second electronic switch device coupled between said filter and said radio tuner; a switch adapted to interconnect one of said television tuner and said radio tuner with said source of electrical power; and said first and second switch devices operable such that when said television tuner is interconnected with said source of electrical power, said first electronic switch device exhibits a low impedance and said second electronic switch device exhibits a high impedance which decouples the tunable resonant circuits of said television and said radio tuners, and when said radio tuner is interconnected with said source of electrical power, said second electronic switch device exhibits a low impedance and said first electronic switch device exhibits a high impedance which decouples the tunable resonant circuits of said television and said radio tuners.
Claim 6
Dependent Claim
236 words
A signal distribution system comprising: a source of electrical power; a source of VHF television signals and FM radio signals; a television tuner for processing said VHF television signals and including tunable resonant circuits, said television tuner operable when energized by said source of electrical power; a radio tuner for processing said FM radio signalS and including tunable resonant circuits, said radio tuner operable when energized by said source of electrical power; filter means coupled to said source of signals and adapted to pass said VHF television and FM radio signals; a first electronic switch device coupled between said filter and said television tuner; a second electronic switch device coupled between said filter and said radio tuner; a switch adapted to interconnect one of said television tuner and said radio tuner with said source of electrical power; and said first and second switch devices operable such that when said television tuner is interconnected with said source of electrical power, said first electronic switch device exhibits a low impedance and said second electronic switch device exhibits a high impedance which decouples the tunable resonant circuits of said television and said radio tuners, and when said radio tuner is interconnected with said source of electrical power, said second electronic switch device exhibits a low impedance and said first electronic switch device exhibits a high impedance which decouples the tunable resonant circuits of said television and said radio tuners.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |