US3278675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wired broadcasting systems and apparatus therefor
Assignee: Communications Patents Ltd
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Filing: 1963-05-17
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Granted: 1966-10-11
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Expires: 1983-05-17
Abstract
No abstract record available.
Inventors
- 👤 Gargini Eric John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:58
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
A WIRED BROADCASTING SYSTEM COMPRISING A CONDUCTIVE NETWORK WHICH PROVIDES AT LEAST TWO SIGNAL PATHS, TRANSMITTING APPARATUS FOR PRODUCING IN RESPECT OF EACH OF AT LEAST TWO COLOUR TELEVISION TRANSMISSIONS AND APPLYING TO SAID PATHS A MODULATED CARRIER WAVE BRIGHTNESS INFORMATION COMPONENT AND A SUPPRESSED CARRIER WAVE COLOUR INFORMATION COMPONENT, AND MEANS SERVING TO ENSURE THAT FOR EACH SUCH COLOUR COMPONENT PRESENT IN ONE SUCH PATH THERE IS MADE AVAILABLE IN ANOTHER SUCH PATH A BRIGHTNESS INFORMATION COMPONENT THE CARRIER FREQUENCY OF WHICH CORRESPONDS TO THAT OF THE SUPPRESSED CARRIER OF THIS COLOUR COMPONENT, A TELEVISION RECEIVING APPARATUS, MEANS CONNECTING SAID TELEVISION RECEIVING APPARATUS TO EACH OF SAID TWO PATHS SIMULTANEOUSLY, MEANS FOR UTILIZING SAID MODULATED CARRIER WAVE BRIGHTNESS INFORMATION COMPONENT AND SAID SUPPRESSED CARRIER WAVE COLOUR INFORMATION COMPONENT FROM ONE OF SAID TWO SIGNAL PATHS IN THE REPRODUCTION OF ONE OF SAID COLOUR TELEVISION TRANSMISSIONS, SAID MEANS INCLUDING A SYNCHRONOUS DETECTOR DEVICE FOR DEMODULATING SAID SUPPRESSED CARRIER WAVE COLOUR INFORMATION COMPONENT WITH THE AID OF A REINSERTION CARRIER, AND MEANS FOR UTILIZING THE CARRIER WAVE OF SAID MODULATED CARRIER WAVE BRIGHTNESS INFORMATION COMPONENT FROM THE OTHER OF SAID TWO SIGNAL PATHS TO PROVIDE SAID REINSERTION CARRIER FOR SAID SYNCHRONOUS DETECTOR DEVICE.
Claim 2
Dependent Claim
202 words
A WIRED BROADCASTING SYSTEM COMPRISING A CONDUCTIVE NETWORK WHICH PROVIDES AT LEAST TWO SIGNAL PATHS, TRANSMITTING APPARATUS FOR PRODUCING IN RESPECT OF EACH OF AT LEAST TWO COLOUR TELEVISION TRANSMISSIONS AND APPLYING TO SAID PATHS A MODULATED CARRIER WAVE BRIGHTNESS INFORMATION COMPONENT AND A SUPPRESSED CARRIER WAVE COLOUR INFORMATION COMPONENT, AND MEANS SERVING TO ENSURE THAT FOR EACH SUCH COLOUR COMPONENT PRESENT IN ONE SUCH PATH THERE IS MADE AVAILABLE IN ANOTHER SUCH PATH A BRIGHTNESS INFORMATION COMPONENT THE CARRIER FREQUENCY OF WHICH CORRESPONDS TO THAT OF THE SUPPRESSED CARRIER OF THIS COLOUR COMPONENT, A TELEVISION RECEIVING APPARATUS, MEANS CONNECTING SAID TELEVISION RECEIVING APPARATUS TO EACH OF SAID TWO PATHS SIMULTANEOUSLY, MEANS FOR UTILIZING SAID MODULATED CARRIER WAVE BRIGHTNESS INFORMATION COMPONENT AND SAID SUPPRESSED CARRIER WAVE COLOUR INFORMATION COMPONENT FROM ONE OF SAID TWO SIGNAL PATHS IN THE REPRODUCTION OF ONE OF SAID COLOUR TELEVISION TRANSMISSIONS, SAID MEANS INCLUDING A SYNCHRONOUS DETECTOR DEVICE FOR DEMODULATING SAID SUPPRESSED CARRIER WAVE COLOUR INFORMATION COMPONENT WITH THE AID OF A REINSERTION CARRIER, AND MEANS FOR UTILIZING THE CARRIER WAVE OF SAID MODULATED CARRIER WAVE BRIGHTNESS INFORMATION COMPONENT FROM THE OTHER OF SAID TWO SIGNAL PATHS TO PROVIDE SAID REINSERTION CARRIER FOR SAID SYNCHRONOUS DETECTOR DEVICE.
References Cited (Backward Citations)
GB723123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |