US3296472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Series direct current motor field poles
Assignee: Individual
•
Filing: 1966-06-21
•
Granted: 1967-01-03
•
Expires: 1986-06-21
Abstract
No abstract record available.
Inventors
- 👤 Fisher Alec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:51
CPC Classifications
H; H02; H02K; H02K23/00; H02K23/40; H02K23/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
AN N-POLE SERIES DIRECT CURRENT MOTOR COMPRISING: (A) AN ARMATURE; (B) A FIELD STRUCTURE ARRANGED FOR COACTION WITH SAID ARMATURE AND CONSISTING OF A FIELD YOKE HAVING ONLY N-MAGNETIZABLE MEMBERS PROJECTING THEREFROM TOWARD SAID ARMATURE AND TERMINATING NEAR SAID ARMATURE IN A POLE FACE HAVING AN AXIALLY EXTENDING NOTCH THEREIN WHICH DIVIDES SAID POLE FACE INTO A MAIN POLE FACE PORTION AND A COMMUTATING POLE FACE PORTION WITH SAID NOTCH PROVIDING A PREDETERMINED SPACING THEREBETWEEN, THE CENTER OF SAID COMMUTATING POLE FACE PORTION BEING LOCATED APPROXIMATELY ON THE LINE OF THE MECHANICAL NEUTRAL OF SAID MOTOR; (C) A WINDING CONNECTED IN SERIES WITH THE ARMATURE CIRCUIT OF SAID MOTOR AND ARRANGED ON SAID MAGNETIZABLE MEMBERS TO PROVIDE MAGNETIC EXCITATION THEREFOR; AND
Claim 2
Dependent Claim
121 words
AN N-POLE SERIES DIRECT CURRENT MOTOR COMPRISING: (A) AN ARMATURE; (B) A FIELD STRUCTURE ARRANGED FOR COACTION WITH SAID ARMATURE AND CONSISTING OF A FIELD YOKE HAVING ONLY N-MAGNETIZABLE MEMBERS PROJECTING THEREFROM TOWARD SAID ARMATURE AND TERMINATING NEAR SAID ARMATURE IN A POLE FACE HAVING AN AXIALLY EXTENDING NOTCH THEREIN WHICH DIVIDES SAID POLE FACE INTO A MAIN POLE FACE PORTION AND A COMMUTATING POLE FACE PORTION WITH SAID NOTCH PROVIDING A PREDETERMINED SPACING THEREBETWEEN, THE CENTER OF SAID COMMUTATING POLE FACE PORTION BEING LOCATED APPROXIMATELY ON THE LINE OF THE MECHANICAL NEUTRAL OF SAID MOTOR; (C) A WINDING CONNECTED IN SERIES WITH THE ARMATURE CIRCUIT OF SAID MOTOR AND ARRANGED ON SAID MAGNETIZABLE MEMBERS TO PROVIDE MAGNETIC EXCITATION THEREFOR; AND
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |