US3121846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state commutator with sequentially operated oscillators
Assignee: Singer Co
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Filing: 1960-11-04
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Granted: 1964-02-18
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Expires: 1980-11-04
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Wormser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:08
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A SOLID STATE COMMUTATOR COMPRISING A CLOSED SEQUENTIAL RING CONFIGURATION OF N TRANSISTORS, EACH CONNECTED IN THE COMMON EMITTER MODE AND BIASED FOR SLIGHT CONDUCTION IN THE QUIESCENT STATE IN WHICH N IS AN INTEGER GREATER THAN 2, HAVING THE COLLECTOR OF EACH TRANSISTOR COUPLED THROUGH A RESPECTIVE CAPACITOR TO THE BASE OF THE NEXT TRANSISTOR IN SEQUENCE, WITH PROVISION FOR DIRECTED STARTING INCLUDING A SWITCH FOR CONNECTING THE BASE OF ANY ONE OF SAID TRANSISTORS TO A VOLTAGE TO BIAS IT OFF, A CAPACITOR IN SHUNT WITH SAID SWITCH AND A DIODE IN SERIES WITH SAID BASE AND SAID SWITCH AND POLARIZED TO APPLY SAID BIASING VOLTAGE TO SAID BASE IN THE CLOSED POSITION OF SAID SWITCH.
Claim 2
Dependent Claim
118 words
A SOLID STATE COMMUTATOR COMPRISING A CLOSED SEQUENTIAL RING CONFIGURATION OF N TRANSISTORS, EACH CONNECTED IN THE COMMON EMITTER MODE AND BIASED FOR SLIGHT CONDUCTION IN THE QUIESCENT STATE IN WHICH N IS AN INTEGER GREATER THAN 2, HAVING THE COLLECTOR OF EACH TRANSISTOR COUPLED THROUGH A RESPECTIVE CAPACITOR TO THE BASE OF THE NEXT TRANSISTOR IN SEQUENCE, WITH PROVISION FOR DIRECTED STARTING INCLUDING A SWITCH FOR CONNECTING THE BASE OF ANY ONE OF SAID TRANSISTORS TO A VOLTAGE TO BIAS IT OFF, A CAPACITOR IN SHUNT WITH SAID SWITCH AND A DIODE IN SERIES WITH SAID BASE AND SAID SWITCH AND POLARIZED TO APPLY SAID BIASING VOLTAGE TO SAID BASE IN THE CLOSED POSITION OF SAID SWITCH.
References Cited (Backward Citations)
US2876365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |