US3344339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for providing a constant current source
Assignee: Allis Chalmers Corp
•
Filing: 1964-05-08
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Granted: 1967-09-26
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Expires: 1984-05-08
Abstract
No abstract record available.
Inventors
- 👤 Baude John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:53
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/40; G05F1/44; G05F1/445
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A CIRCUIT FOR PROVIDING A CONSTANT CURRENT OUTPUT THROUGH A LOAD WITH SAID OUTPUT DERIVED FROM A POWER SYSTEM COMPRISING: FIRST AND SECOND CURRENT MEANS RESPONSIVE TO THE CURRENT OF THE POWER SYSTEM FOR PROVIDING A LOW IMPEDANCE OUTPUT HAVING A CURRENT VARYING AS A FUNCTION OF THE CURRENT OF THE POWER SYSTEM; A FIRST PAIR OF AMPLIFYING STAGES EACH HAVING A LOW IMPEDANCE INPUT AND EACH CONNECTED TO RECEIVE THE OUTPUT OF THE FIRST AND SECOND CURRENT MEANS, RESPECTIVELY, AS AN INPUT SAID FIRST PAIR OF AMPLIFYING STAGES EACH CONNECTED TO PROVIDE A HIGH IMPEDANCE OUTPUT HAVING A CURRENT VARYING AS A FUNCTION OF THE CURRENT OF THE POWER SYSTEM; AN ELECTRICAL SOURCE; A SECOND PAIR OF AMPLIFYING STAGES EACH CONNECTED TO RECEIVE THE OUTPUT OF A DIFFERENT ONE OF SAID FIRST PAIR OF AMPLIFYING STAGES AS AN INPUT AND EACH HAVING AN OUTPUT CIRCUIT WITH SAID OUTPUT CIRCUITS CONNECTED IN SERIES WITH EACH OTHER, IN SERIES WITH THE SOURCE, AND IN SERIES WITH THE LOAD.
Claim 2
Dependent Claim
167 words
A CIRCUIT FOR PROVIDING A CONSTANT CURRENT OUTPUT THROUGH A LOAD WITH SAID OUTPUT DERIVED FROM A POWER SYSTEM COMPRISING: FIRST AND SECOND CURRENT MEANS RESPONSIVE TO THE CURRENT OF THE POWER SYSTEM FOR PROVIDING A LOW IMPEDANCE OUTPUT HAVING A CURRENT VARYING AS A FUNCTION OF THE CURRENT OF THE POWER SYSTEM; A FIRST PAIR OF AMPLIFYING STAGES EACH HAVING A LOW IMPEDANCE INPUT AND EACH CONNECTED TO RECEIVE THE OUTPUT OF THE FIRST AND SECOND CURRENT MEANS, RESPECTIVELY, AS AN INPUT SAID FIRST PAIR OF AMPLIFYING STAGES EACH CONNECTED TO PROVIDE A HIGH IMPEDANCE OUTPUT HAVING A CURRENT VARYING AS A FUNCTION OF THE CURRENT OF THE POWER SYSTEM; AN ELECTRICAL SOURCE; A SECOND PAIR OF AMPLIFYING STAGES EACH CONNECTED TO RECEIVE THE OUTPUT OF A DIFFERENT ONE OF SAID FIRST PAIR OF AMPLIFYING STAGES AS AN INPUT AND EACH HAVING AN OUTPUT CIRCUIT WITH SAID OUTPUT CIRCUITS CONNECTED IN SERIES WITH EACH OTHER, IN SERIES WITH THE SOURCE, AND IN SERIES WITH THE LOAD.
References Cited (Backward Citations)
US3175077A
Cited
US3233161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |