US3204130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fast acting time delay utilizing regeneratively coupled transistors
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1962-10-01
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Granted: 1965-08-31
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Expires: 1982-10-01
Abstract
No abstract record available.
Inventors
- 👤 John J Hickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:16
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/64; H; H03; H03K; H03K5/00; H03K5/13; H03K5/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A TIME DELAY CIRCUIT, COMPRISING: A TRANSISTOR HAVING AN INPUT CIRCUIT AND AN OUTPUT CIRCUIT; A FIRST CIRCUIT INCLUDING AN INDICATOR, A CAPACITOR, AND A UNIDIRECTIOAL CURRENT CONDUCTING DEVICE CONNECTED IN SERIES IN THE OUTPUT CIRCUIT OF SAID TRANSISTOR, SAID CAPACITOR AND SAID INDUCTOR BEING SERIES RESONANT AT A PREDETERMINED FREQUENCY; A SECOND CIRCUIT INCLUDING A UNIDIRECTIONAL CURRENT SOURCE AND A RESISTOR CONNECTED IN SERIES IN THE OUTPUT CIRCUIT OF SAID TRANSISTOR; CIRCUIT MEANS CONNECTED TO INITIALLY PREVENT CURRENT FLOW IN THE OUTPUT CIRCUIT OF AID TRANSISTOR; AD CIRCUIT MEANS CONNECTED TO APPLY A TRIGGER PULSE TO THE INPUT CIRCUIT OF SAID TRANSISTOR AND TO CAUSE CURRENT TO FLOW IN THE OUTPUT CIRCUIT THEREOF FOR A TIME ONLY SLIGHTLY GREATER THAN THE HALF PERIOD OF SAID PREDETERMINED FREQUENCY.
Claim 2
Dependent Claim
128 words
A TIME DELAY CIRCUIT, COMPRISING: A TRANSISTOR HAVING AN INPUT CIRCUIT AND AN OUTPUT CIRCUIT; A FIRST CIRCUIT INCLUDING AN INDICATOR, A CAPACITOR, AND A UNIDIRECTIOAL CURRENT CONDUCTING DEVICE CONNECTED IN SERIES IN THE OUTPUT CIRCUIT OF SAID TRANSISTOR, SAID CAPACITOR AND SAID INDUCTOR BEING SERIES RESONANT AT A PREDETERMINED FREQUENCY; A SECOND CIRCUIT INCLUDING A UNIDIRECTIONAL CURRENT SOURCE AND A RESISTOR CONNECTED IN SERIES IN THE OUTPUT CIRCUIT OF SAID TRANSISTOR; CIRCUIT MEANS CONNECTED TO INITIALLY PREVENT CURRENT FLOW IN THE OUTPUT CIRCUIT OF AID TRANSISTOR; AD CIRCUIT MEANS CONNECTED TO APPLY A TRIGGER PULSE TO THE INPUT CIRCUIT OF SAID TRANSISTOR AND TO CAUSE CURRENT TO FLOW IN THE OUTPUT CIRCUIT THEREOF FOR A TIME ONLY SLIGHTLY GREATER THAN THE HALF PERIOD OF SAID PREDETERMINED FREQUENCY.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |