US3078379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor power switch
Assignee: Avco Corp
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Filing: 1960-08-26
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Granted: 1963-02-19
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Expires: 1980-08-26
Abstract
No abstract record available.
Inventors
- 👤 Allen E Plogstedt
- 👤 Richard W Bradmiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:59
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/66; H03K17/661; H03K17/662; H03K17/663
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
297 words
IN AN ELECTRONIC SWITCH FOR REVERSING THE DIRECTION OF CURRENT FROM A DIRECT CURRENT SOURCE THROUGH A LOAD, THE COMBINATION COMPRISING: A WHEATSTONE BRIDGE HAVING INPUT TERMINALS AND OUTPUT TERMINALS, SAID INPUT TERMINALS BEING CONNECTED ACROSS SAID SOURCE; FIRST AND SECOND TRANSISTORS OF OPPOSITE CONDUCTIVITY TYPES HAVING BASE, EMITTER, AND COLLECTOR ELECTRODES, SAID BASE ELECTRODES BEING INTERCONNECTED AND SAID EMITTER ELECTRODES BEING INTERCONNECTED; SAID OUTPUT CIRCUIT BEING CONNECTED ACROSS SAID BASE AND EMITTER ELECTRODES; THIRD AND FOURTH TRANSISTORS, EACH HAVING BASE, COLLECTOR, AND EMITTER ELECTRODES, SAID THIRD TRANSISTOR BEING OF AN OPPOSITE CONDUCTIVITY TYPE FROM SAID FIRST TRANSISTOR, THE BASE ELECTRODE OF SAID THIRD TRANSISTOR BEING DIRECTLY CONNECTED TO THE COLLECTOR ELECTRODE OF SAID FIRST TRANSISTOR, SAID FOURTH TRANSISTOR BEING OF AN OPPOSITE CONDUCTIVITY TYPE FROM SAID SECOND TRANSISTOR, AND THE BASE ELECTRODE OF SAID FOURTH TRANSISTOR BEING DIRECTLY CONNECTED TO THE COLLECTOR ELECTRODE OF SAID SECOND TRANSISTOR; AN ELECTRONIC SWITCH, INCLUDING FIFTH AND SIXTH TRANSISTORS OF OPPOSITE CONDUCTIVITY TYPES, EACH HAVING BASE, COLLECTOR, AND EMITTER ELECTRODES, SAID LOAD BEING CONNECTED BETWEEN SAID COLLECTOR ELECTRODES FOR CONDUCTION IN ONE DIRECTION AND SAID EMITTER ELECTRODES BEING CONNECTED ACROSS SAID SOURCE, SEVENTH AND EIGHTH TRANSISTORS OF OPPOSITE CONDUCTIVITY TYPES, EACH HAVING BASE, COLLECTOR, AND EMITTER ELECTRODES, SAID LOAD BEING CONNECTED BETWEEN SAID COLLECTOR ELECTRODES FOR CONDUCTION IN THE OPPOSITE DIRECTION AND SAID EMITTER ELECTRODES BEING CONNECTED ACROSS SAID SOURCE; AND CONNECTIONS FROM THE EMITTER ELECTRODES OF SAID THIRD AND FOURTH TRANSISTORS TO THE BASE ELECTRODES OF SAID FIFTH AND EIGHTH ELECTRODES, RESPECTIVELY AND CONNECTIONS FROM THE COLLECTOR ELECTRODES OF SAID THIRD AND FOURTH TRANSISTORS TO THE BASE ELECTRODES OF SAID SIXTH AND SEVENTH TRANSISTORS, RESPECTIVELY, WHEREBY AN UNBALANCE CONDITION IN SAID WHEATSTONE BRIDGE WILL RESULT IN CURRENT FLOW THROUGH SAID LOAD IN ONE DIRECTION OR IN THE OPPOSITE DIRECTION.
Claim 2
Dependent Claim
297 words
IN AN ELECTRONIC SWITCH FOR REVERSING THE DIRECTION OF CURRENT FROM A DIRECT CURRENT SOURCE THROUGH A LOAD, THE COMBINATION COMPRISING: A WHEATSTONE BRIDGE HAVING INPUT TERMINALS AND OUTPUT TERMINALS, SAID INPUT TERMINALS BEING CONNECTED ACROSS SAID SOURCE; FIRST AND SECOND TRANSISTORS OF OPPOSITE CONDUCTIVITY TYPES HAVING BASE, EMITTER, AND COLLECTOR ELECTRODES, SAID BASE ELECTRODES BEING INTERCONNECTED AND SAID EMITTER ELECTRODES BEING INTERCONNECTED; SAID OUTPUT CIRCUIT BEING CONNECTED ACROSS SAID BASE AND EMITTER ELECTRODES; THIRD AND FOURTH TRANSISTORS, EACH HAVING BASE, COLLECTOR, AND EMITTER ELECTRODES, SAID THIRD TRANSISTOR BEING OF AN OPPOSITE CONDUCTIVITY TYPE FROM SAID FIRST TRANSISTOR, THE BASE ELECTRODE OF SAID THIRD TRANSISTOR BEING DIRECTLY CONNECTED TO THE COLLECTOR ELECTRODE OF SAID FIRST TRANSISTOR, SAID FOURTH TRANSISTOR BEING OF AN OPPOSITE CONDUCTIVITY TYPE FROM SAID SECOND TRANSISTOR, AND THE BASE ELECTRODE OF SAID FOURTH TRANSISTOR BEING DIRECTLY CONNECTED TO THE COLLECTOR ELECTRODE OF SAID SECOND TRANSISTOR; AN ELECTRONIC SWITCH, INCLUDING FIFTH AND SIXTH TRANSISTORS OF OPPOSITE CONDUCTIVITY TYPES, EACH HAVING BASE, COLLECTOR, AND EMITTER ELECTRODES, SAID LOAD BEING CONNECTED BETWEEN SAID COLLECTOR ELECTRODES FOR CONDUCTION IN ONE DIRECTION AND SAID EMITTER ELECTRODES BEING CONNECTED ACROSS SAID SOURCE, SEVENTH AND EIGHTH TRANSISTORS OF OPPOSITE CONDUCTIVITY TYPES, EACH HAVING BASE, COLLECTOR, AND EMITTER ELECTRODES, SAID LOAD BEING CONNECTED BETWEEN SAID COLLECTOR ELECTRODES FOR CONDUCTION IN THE OPPOSITE DIRECTION AND SAID EMITTER ELECTRODES BEING CONNECTED ACROSS SAID SOURCE; AND CONNECTIONS FROM THE EMITTER ELECTRODES OF SAID THIRD AND FOURTH TRANSISTORS TO THE BASE ELECTRODES OF SAID FIFTH AND EIGHTH ELECTRODES, RESPECTIVELY AND CONNECTIONS FROM THE COLLECTOR ELECTRODES OF SAID THIRD AND FOURTH TRANSISTORS TO THE BASE ELECTRODES OF SAID SIXTH AND SEVENTH TRANSISTORS, RESPECTIVELY, WHEREBY AN UNBALANCE CONDITION IN SAID WHEATSTONE BRIDGE WILL RESULT IN CURRENT FLOW THROUGH SAID LOAD IN ONE DIRECTION OR IN THE OPPOSITE DIRECTION.
References Cited (Backward Citations)
US2788493A
Cited
US2821639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |