US3243678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor control system
Assignee: Motors Liquidation Co
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Filing: 1962-08-13
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Granted: 1966-03-29
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Expires: 1982-08-13
Abstract
No abstract record available.
Inventors
- 👤 Frier Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:42
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; B; B60; B60L; B60L15/00; B60L15/02; B60L15/04; B60L2200/00; B60L2200/22; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN COMBINATION, FIRST AND SECOND SOURCES OF DIRECT CURRENT, A D.C. MOTOR HAVING AN ARMATURE AND AT LEAST TWO FIELD WINDINGS, FIRST MAGNETIC SWITCH MEANS FOR CONNECTING SAID SOURCES OF DIRECT CURRENT IN SERIES OR IN PARALLEL WITH CONDUCTORS FOR FEEDING SAID MOTOR, SECOND MAGNETIC SWITCH MEANS FOR CONNECTING THE FIELD WINDINGS OF SAID MOTOR IN SEIRES OR IN PARALLEL, A PLURALITY OF MANUALLY OPERABLE SWITCHES CONNECTED WITH SAID FIRST AND SECOND MAGNETIC SWITCH MEANS FOR CONTROLLING THE OPERATION OF SAID FIRST AND SECOND MAGNETIC SWITCH MEANS IN A PREDETERMINED SEQUENCE, AND MEANS OPERABLE IN ONE POSITION OF SAID MANUALLY OPERABLE SWITCHS FOR CONTROLLING THE ENERGIZATION OF SAID SECOND MAGNETIC SWITCH MEANS IN RESPONSE TO THE SPEED OF SAID MOTOR.
Claim 2
Dependent Claim
120 words
IN COMBINATION, FIRST AND SECOND SOURCES OF DIRECT CURRENT, A D.C. MOTOR HAVING AN ARMATURE AND AT LEAST TWO FIELD WINDINGS, FIRST MAGNETIC SWITCH MEANS FOR CONNECTING SAID SOURCES OF DIRECT CURRENT IN SERIES OR IN PARALLEL WITH CONDUCTORS FOR FEEDING SAID MOTOR, SECOND MAGNETIC SWITCH MEANS FOR CONNECTING THE FIELD WINDINGS OF SAID MOTOR IN SEIRES OR IN PARALLEL, A PLURALITY OF MANUALLY OPERABLE SWITCHES CONNECTED WITH SAID FIRST AND SECOND MAGNETIC SWITCH MEANS FOR CONTROLLING THE OPERATION OF SAID FIRST AND SECOND MAGNETIC SWITCH MEANS IN A PREDETERMINED SEQUENCE, AND MEANS OPERABLE IN ONE POSITION OF SAID MANUALLY OPERABLE SWITCHS FOR CONTROLLING THE ENERGIZATION OF SAID SECOND MAGNETIC SWITCH MEANS IN RESPONSE TO THE SPEED OF SAID MOTOR.
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |