US3201681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supply circuit and abrupt current and voltage limiting means therefor
Assignee: US Philips Corp
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Filing: 1961-05-26
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Granted: 1965-08-17
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Expires: 1981-05-26
Abstract
No abstract record available.
Inventors
- 👤 Jacob Van Wifgen
- 👤 Lampe Albert Cornelis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:28
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/32; H02J7/14; H02J7/16; H02J7/60; H02J7/64; H02J7/80; H02J7/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A CURRENT AND VOLTAGE LIMITER COMPRISING: A VOLTAGE SOURCE, A LOAD SUPPLIED BY SAID SOURCE, A FIRST TRANSISTOR, FIRST MEANS FOR DERIVING A FIRST DIRECT VOLTAGE PROPORTIONAL TO THE CURRENT SUPPLIED TO SAID LOAD BY SAID SOURCE, SAID FIRST MEANS BEING CONNECTED BETWEEN THE BASE AND EMITTER OF SAID FIRST TRANSISTOR, A SECOND TRANSISTOR, SECOND MEANS FOR DERIVING A SECOND DIRECT VOLTAGE PROPORTIONAL TO THE VOLTAGE APPLIED TO SAID LOAD BY SAID SOURCE, THE BASE-EMITTER CIRCUIT OF SAID SECOND TRANSISTOR BEING COUPLED TO THE SERIES CIRCUIT COMBINATION OF SAID SECOND MEANS AND A REFERENCE DIRECT VOLTAGE SOURCE OF OPPOSITE POLARITY, AND CIRCUIT MEANS FOR APPLYING SAID FIRST DIRECT VOLTAGE BETWEEN THE BASE AND EMITTER OF SAID SECOND TRANSISTOR, SAID FIRST DIRECT
Claim 2
Dependent Claim
121 words
A CURRENT AND VOLTAGE LIMITER COMPRISING: A VOLTAGE SOURCE, A LOAD SUPPLIED BY SAID SOURCE, A FIRST TRANSISTOR, FIRST MEANS FOR DERIVING A FIRST DIRECT VOLTAGE PROPORTIONAL TO THE CURRENT SUPPLIED TO SAID LOAD BY SAID SOURCE, SAID FIRST MEANS BEING CONNECTED BETWEEN THE BASE AND EMITTER OF SAID FIRST TRANSISTOR, A SECOND TRANSISTOR, SECOND MEANS FOR DERIVING A SECOND DIRECT VOLTAGE PROPORTIONAL TO THE VOLTAGE APPLIED TO SAID LOAD BY SAID SOURCE, THE BASE-EMITTER CIRCUIT OF SAID SECOND TRANSISTOR BEING COUPLED TO THE SERIES CIRCUIT COMBINATION OF SAID SECOND MEANS AND A REFERENCE DIRECT VOLTAGE SOURCE OF OPPOSITE POLARITY, AND CIRCUIT MEANS FOR APPLYING SAID FIRST DIRECT VOLTAGE BETWEEN THE BASE AND EMITTER OF SAID SECOND TRANSISTOR, SAID FIRST DIRECT
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |