US3132261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delay circuit employing feedback to hold normally-open switch closed, allowing capacitor to fully discharge
Assignee: Unisys Corp
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Filing: 1961-08-28
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Granted: 1964-05-05
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Expires: 1981-08-28
Abstract
No abstract record available.
Inventors
- 👤 Frank W Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:30
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/284
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
115 words
A DELAY CIRCUIT COMPRISING: A CAPACITOR; A BIASING RESISTOR COUPLED TO THE CAPACITOR; MEANS FOR CHARGING THE CAPACITOR THROUGH THE BIASING RESISTOR; A NORMALLY OPEN SWITCH COUPLED TO A JUNCTION OF THE CAPACITOR AND THE BIASING RESISTOR AND HAVING AN INPUT TERMINAL, THE SWITCH BEING ARRANGED TO CLOSE AND PROVIDE A DISCHARGE PATH FOR THE CAPACITOR IN RESPONSE TO AN INPUT SIGNAL APPLIED TO THE INPUT TERMINAL; FEEDBACK MEANS COUPLED BETWEEN THE JUNCTION OF THE CAPACITOR AND THE BIASING RESISTOR AND THE INPUT TERMINAL FOR MAINTAINING THE SWITCH CLOSED FOR A PERIOD OF TIME REQUIRED FOR THE CAPACITOR TO FULLY DISCHARGE; AND OUTPUT MEANS COUPLED TO THE JUNCTION OF THE CAPACITOR AND THE BIASING RESISTOR.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |