US3255402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current control circuits
Assignee: Siemens and Halske AG
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Filing: 1960-09-22
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Granted: 1966-06-07
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Expires: 1980-09-22
Abstract
No abstract record available.
Inventors
- 👤 Vollnhals Friedemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:22
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/20; G05F3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
AN ELECTRONIC TWO-TERMINAL CIRCUIT ARRANGEMENT HAVING AN INPUT TERMINAL AND AN OUTPUT TERMINAL, CONNECTED IN A CURRENT-TRANSVERSED BRANCH FOR MAINTAINING THE CURRENT IN SUCH BRANCH CONSTANT, COMPRISING A FIRST RESISTOR AND A FIRST TRANSISTOR HAVING AN EMITTER, A BASE, AND A COLLECTOR, MEANS CONNECTING SAID FIRST RESISTOR IN A FIRST SERIES CIRCUIT WITH THE EMITTER-COLLECTOR PATH OF SAID FIRST TRANSISTOR OPERATIVELY EXTENDING BETWEEN SAID INPUT TERMINAL AND SAID OUTPUT TERMINAL, A ZENER DIODE, A SECOND TRANSISTOR OF THE SAME TYPE AS SAID FIRST TRANSISTOR, SAID SECOND TRANSISTOR HAVING AN EMITTER, A BASE, AND A COLLECTOR, A SECOND RESISTOR, MEANS CONNECTING SAID ZENER DIODE, THE EMITTERCOLLECTOR PATH OF SAID SECOND TRANSISTOR AND SAID SECOND RESISTOR IN A SECOND SERIES CIRCUIT OPERATIVELY EXTENDING BETWEEN SAID INPUT TERMINAL AND SAID OUTPUT TERMINAL, AND WITH SAID FIRST SERIES CIRCUIT FORMING PARALLEL CURRENT PATHS IN SAID CURRENT-TRAVERSED BRANCH, MEANS CONNECTING THE BASE OF SAID FIRST TRANSISTOR WITH THE COLLECTOR OF SAID SECOND TRANSISTOR, AND MEANS CONNECTING THE BASE OF SAID SECOND TRANSISTOR WITH THE EMITTER OF SAID FIRST TRANSISTOR.
Claim 2
Dependent Claim
174 words
AN ELECTRONIC TWO-TERMINAL CIRCUIT ARRANGEMENT HAVING AN INPUT TERMINAL AND AN OUTPUT TERMINAL, CONNECTED IN A CURRENT-TRANSVERSED BRANCH FOR MAINTAINING THE CURRENT IN SUCH BRANCH CONSTANT, COMPRISING A FIRST RESISTOR AND A FIRST TRANSISTOR HAVING AN EMITTER, A BASE, AND A COLLECTOR, MEANS CONNECTING SAID FIRST RESISTOR IN A FIRST SERIES CIRCUIT WITH THE EMITTER-COLLECTOR PATH OF SAID FIRST TRANSISTOR OPERATIVELY EXTENDING BETWEEN SAID INPUT TERMINAL AND SAID OUTPUT TERMINAL, A ZENER DIODE, A SECOND TRANSISTOR OF THE SAME TYPE AS SAID FIRST TRANSISTOR, SAID SECOND TRANSISTOR HAVING AN EMITTER, A BASE, AND A COLLECTOR, A SECOND RESISTOR, MEANS CONNECTING SAID ZENER DIODE, THE EMITTERCOLLECTOR PATH OF SAID SECOND TRANSISTOR AND SAID SECOND RESISTOR IN A SECOND SERIES CIRCUIT OPERATIVELY EXTENDING BETWEEN SAID INPUT TERMINAL AND SAID OUTPUT TERMINAL, AND WITH SAID FIRST SERIES CIRCUIT FORMING PARALLEL CURRENT PATHS IN SAID CURRENT-TRAVERSED BRANCH, MEANS CONNECTING THE BASE OF SAID FIRST TRANSISTOR WITH THE COLLECTOR OF SAID SECOND TRANSISTOR, AND MEANS CONNECTING THE BASE OF SAID SECOND TRANSISTOR WITH THE EMITTER OF SAID FIRST TRANSISTOR.
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |