US3207952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cable fade-in circuit
Assignee: Individual
•
Filing: 1961-12-19
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Granted: 1965-09-21
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Expires: 1981-12-19
Abstract
No abstract record available.
Inventors
- 👤 Charles B Brahm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:58
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/222; H04N5/262; H04N5/265; H03; H03K; H03K17/00; H03K17/51; H03K17/74; Y; Y10; Y10S; Y10S84/00; Y10S84/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A CABLE FADE-IN CIRCUIT COMPRISING INPUT TRANSFORMER COUPLING MEANS, AND OUTPUT TRANSFORMER COUPLING MEANS, BLOCKING MEANS PREVENTING THE TRANSFER OF SIGNALS FROM SAID INPUT MEANS TO SAID OUTPUT MEANS, SAID BLOCKING MEANS COMPRISING BACK-TO-BACK DIODES CONNECTED BETWEEN SAID INPUT AND OUTPUT MEANS, BIASING COUPLING MEANS CONNECTED TO THE ANODES OF SAID DIODES, SAID BIASING COUPLING MEANS COMPRISING A SLOW CHARGING PATH OF A RESISTOR AND CAPACITOR FOR CONNECTING A BIASING POTENTIAL TO SAID ANODES WHEREBY LARGE CABLE SIGNALS ARE ONLY ALLOWED TO PASS WHEN THE BIASING POTENTIAL HAS REACHED A CERTAIN MAGNITUDE.
Claim 2
Dependent Claim
92 words
A CABLE FADE-IN CIRCUIT COMPRISING INPUT TRANSFORMER COUPLING MEANS, AND OUTPUT TRANSFORMER COUPLING MEANS, BLOCKING MEANS PREVENTING THE TRANSFER OF SIGNALS FROM SAID INPUT MEANS TO SAID OUTPUT MEANS, SAID BLOCKING MEANS COMPRISING BACK-TO-BACK DIODES CONNECTED BETWEEN SAID INPUT AND OUTPUT MEANS, BIASING COUPLING MEANS CONNECTED TO THE ANODES OF SAID DIODES, SAID BIASING COUPLING MEANS COMPRISING A SLOW CHARGING PATH OF A RESISTOR AND CAPACITOR FOR CONNECTING A BIASING POTENTIAL TO SAID ANODES WHEREBY LARGE CABLE SIGNALS ARE ONLY ALLOWED TO PASS WHEN THE BIASING POTENTIAL HAS REACHED A CERTAIN MAGNITUDE.
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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |