US3137809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
freiberg
Assignee: —
•
Filing: —
•
Granted: 1964-06-16
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Expires: 1981-06-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:05
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/18; F; F41; F41G; F41G7/00; F41G7/20; F41G7/30; F41G7/301; H; H02; H02P; H02P23/00; H02P23/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
AN ELECTRIC SERVOMECHANISM FOR CONTROLLING A SINGLE COIL MOTOR, COMPRISING A MAGNETIC CONTROL CIRCUIT PROVIDING AN OUTPUT VOLTAGE WHOSE POLARITY IS DEPENDENT UPON THE POLARITY OF A COMMON CONTROL SIGNAL, A DRIVER CIRCUIT CONSISTING OF FIRST AND SECOND TRANSISTORS HAVING THEIR EMITTERS CONNECTED TO A COMMON SOURCE OF POWER, A PAIR OF VOLTAGE CONTROLLED RECTIFIERS, EACH RECTIFIER BEING CONNECTED TO ONE OF SAID TRANSISTORS AND SAID COMMON SOURCE OF POWER, A BI-DIRECTIONAL MOTOR HAVING A SINGLE FIELD COIL CONNECTED BETWEEN THE COLLECTORS OF SAID TRANSISTORS, AND MEANS RESPONSIVE TO THE OUTPUT OF SAID MAGNETIC CONTROL CIRCUIT FOR SELECTIVELY TRIGGERING ONE OF SAID RECTIFIERS.
Claim 2
Dependent Claim
103 words
AN ELECTRIC SERVOMECHANISM FOR CONTROLLING A SINGLE COIL MOTOR, COMPRISING A MAGNETIC CONTROL CIRCUIT PROVIDING AN OUTPUT VOLTAGE WHOSE POLARITY IS DEPENDENT UPON THE POLARITY OF A COMMON CONTROL SIGNAL, A DRIVER CIRCUIT CONSISTING OF FIRST AND SECOND TRANSISTORS HAVING THEIR EMITTERS CONNECTED TO A COMMON SOURCE OF POWER, A PAIR OF VOLTAGE CONTROLLED RECTIFIERS, EACH RECTIFIER BEING CONNECTED TO ONE OF SAID TRANSISTORS AND SAID COMMON SOURCE OF POWER, A BI-DIRECTIONAL MOTOR HAVING A SINGLE FIELD COIL CONNECTED BETWEEN THE COLLECTORS OF SAID TRANSISTORS, AND MEANS RESPONSIVE TO THE OUTPUT OF SAID MAGNETIC CONTROL CIRCUIT FOR SELECTIVELY TRIGGERING ONE OF SAID RECTIFIERS.
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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |