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US3370181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed transistorized switches providing multiple stable current levels for inertial instruments
Assignee: Massachusetts Institute of Technology
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Filing: 1964-06-17
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Granted: 1968-02-20
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Expires: 1984-06-17
Abstract
No abstract record available.
Inventors
- 👤 James L Sitomer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:50
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03F; H03F1/00; H03F1/42; H03F1/48; H03F3/00; H03F3/45; H03F3/45071
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A MULTIPLE CURRENT LEVEL ELECTRONIC SWITCH INCORPORATING A D-C AMPLIFIER WITH AN OUTPUT TERMINAL SUPPLYING A SUBSTANTIALLY CONSTANT VOLTAGE TO A GIVEN LOAD, COMPRISING IN COMBINATION WITH SAID AMPLIFIER, (A) SIGNAL COUPLING MEANS IN SERIES WITH SAID LOAD, (B) A PLURALITY (N) OF SERIALLY CONNECTED RESISTORS EACH HAVING A FIRST AND SECOND TERMINAL, THE FIRST TERMINAL OF THE NTH RESISTOR IN SERIES WITH SAID LOAD, (C) A LIKE PLURALITY (N) OF TRANSISTORS EACH HAVING A COLLECTOR, BASE AND EMITTER TERMINAL, THE COLLECTOR OF THE NTH TRANSISTOR COUPLED TO THE SECOND TERMINAL OF THE NTH RESISTOR AND THE COLLECTOR OF A DECREASINGLY NUMBERED TRANSISTOR RESPECTIVELY COUPLED TO THE SECOND TERMINAL OF A CORRESPONDINGLY NUMBERED RESISTOR, (D) A REFERENCE VOLTAGE POTENTIAL COUPLED TO SAID EMITTER TERMINALS, AND (E) TRIGGERING MEANS COUPLED TO THE BASE TERMINAL OF EACH TRANSISTOR FOR SWTICHING SAID TRANSISTORS INTO AN ON AND AN OFF OPERATING STATE.
Claim 2
Dependent Claim
148 words
A MULTIPLE CURRENT LEVEL ELECTRONIC SWITCH INCORPORATING A D-C AMPLIFIER WITH AN OUTPUT TERMINAL SUPPLYING A SUBSTANTIALLY CONSTANT VOLTAGE TO A GIVEN LOAD, COMPRISING IN COMBINATION WITH SAID AMPLIFIER, (A) SIGNAL COUPLING MEANS IN SERIES WITH SAID LOAD, (B) A PLURALITY (N) OF SERIALLY CONNECTED RESISTORS EACH HAVING A FIRST AND SECOND TERMINAL, THE FIRST TERMINAL OF THE NTH RESISTOR IN SERIES WITH SAID LOAD, (C) A LIKE PLURALITY (N) OF TRANSISTORS EACH HAVING A COLLECTOR, BASE AND EMITTER TERMINAL, THE COLLECTOR OF THE NTH TRANSISTOR COUPLED TO THE SECOND TERMINAL OF THE NTH RESISTOR AND THE COLLECTOR OF A DECREASINGLY NUMBERED TRANSISTOR RESPECTIVELY COUPLED TO THE SECOND TERMINAL OF A CORRESPONDINGLY NUMBERED RESISTOR, (D) A REFERENCE VOLTAGE POTENTIAL COUPLED TO SAID EMITTER TERMINALS, AND (E) TRIGGERING MEANS COUPLED TO THE BASE TERMINAL OF EACH TRANSISTOR FOR SWTICHING SAID TRANSISTORS INTO AN ON AND AN OFF OPERATING STATE.
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) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |