US3074006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor circuit overload protective device
Assignee: North American Aviation Corp
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Filing: 1958-05-20
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Granted: 1963-01-15
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Expires: 1978-05-20
Abstract
No abstract record available.
Inventors
- 👤 George N Klees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:45
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/565; G05F1/569; G05F1/573
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A CURRENT PROTECTION CIRCUIT COMPRISING A TRANSISTOR HAVING AN EMITTER, A BASE, AND A COLLECTOR, SAID TRANSISTOR OPERABLE IN ACTIVE AND SATURATION REGIONS RESPECTIVELY CHARACTERIZED BY HIGH AND LOW IMPEDANCES, MEANS FOR CONNECTING A LOAD BETWEEN SAID COLLECTOR AND SAID EMITTER, MEANS CONNECTED BETWEEN SAID BASE AND SAID COLLECTOR FOR CAUSING A PREDETERMINED FLOW OF CURRENT THROUGH SAID BASE WHEREBY SAID TRANSISTOR OPERATES IN SAID SATURATION REGION FOR A PREDETERMINED LOAD CURRENT AND IN SAID ACTIVE REGION FOR CURRENT LOADS GREATER THAN SAID PREDETERMINED LOAD CURRENT, AND MEANS RESPONSIVE TO THE IMPEDANCE OF SAID TRANSISTOR FOR DECREASING THE FLOW OF CURRENT THROUGH SAID BASE WHEN THE IMPEDANCE OF SAID TRANSISTOR INCREASES.
Claim 2
Dependent Claim
111 words
A CURRENT PROTECTION CIRCUIT COMPRISING A TRANSISTOR HAVING AN EMITTER, A BASE, AND A COLLECTOR, SAID TRANSISTOR OPERABLE IN ACTIVE AND SATURATION REGIONS RESPECTIVELY CHARACTERIZED BY HIGH AND LOW IMPEDANCES, MEANS FOR CONNECTING A LOAD BETWEEN SAID COLLECTOR AND SAID EMITTER, MEANS CONNECTED BETWEEN SAID BASE AND SAID COLLECTOR FOR CAUSING A PREDETERMINED FLOW OF CURRENT THROUGH SAID BASE WHEREBY SAID TRANSISTOR OPERATES IN SAID SATURATION REGION FOR A PREDETERMINED LOAD CURRENT AND IN SAID ACTIVE REGION FOR CURRENT LOADS GREATER THAN SAID PREDETERMINED LOAD CURRENT, AND MEANS RESPONSIVE TO THE IMPEDANCE OF SAID TRANSISTOR FOR DECREASING THE FLOW OF CURRENT THROUGH SAID BASE WHEN THE IMPEDANCE OF SAID TRANSISTOR INCREASES.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |