US3240964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepping motor
Assignee: Specialties Development Corp
•
Filing: 1963-05-02
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Granted: 1966-03-15
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Expires: 1983-05-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry C Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:33
CPC Classifications
H; H02; H02K; H02K49/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN A STEPPING MOTOR, THE COMBINATION OF A ROTATABLE DRIVE SHAFT, MOTOR MEANS FOR CONSTANTLY APPLYING TORQUE TO SAID SHAFT TO URGE ROTATION THEREOF, A PLURALITY OF RADIALLY EXTENDING ARMATURE MEANS SPACED CIRCUMFERENTIALLY ON SAID SHAFT AND HAVING FREE ENDS ARRANGED TO TRAVEL IN A CIRCULAR PATH, A PLURALITY OF FIXED ELECTROMAGNETIC MEANS EACH HAVING A POLE PROVIDED WITH A FREE END ARRANGED IN AN ADJACENT CIRCULAR ZONE CONCENTRIC WITH AND IN SUBSTANTIALLY THE SAME PLANE AS THE CIRCULAR PATH FOR CREATING AN ELECTROMAGNETIC FIELD BETWEEN THE ZONE AND THE PATH TO CAUSE SAID POLE TO ATTRACT SAID ARMATURE MEANS, SHORT-CIRCUIT COIL MEANS SURROUNDING SAID POLE ADJACENT THE FREE ENDS THEREOF AND ARRANGED TO EXPOSE THE FREE ENDS OF SAID
Claim 2
Dependent Claim
120 words
IN A STEPPING MOTOR, THE COMBINATION OF A ROTATABLE DRIVE SHAFT, MOTOR MEANS FOR CONSTANTLY APPLYING TORQUE TO SAID SHAFT TO URGE ROTATION THEREOF, A PLURALITY OF RADIALLY EXTENDING ARMATURE MEANS SPACED CIRCUMFERENTIALLY ON SAID SHAFT AND HAVING FREE ENDS ARRANGED TO TRAVEL IN A CIRCULAR PATH, A PLURALITY OF FIXED ELECTROMAGNETIC MEANS EACH HAVING A POLE PROVIDED WITH A FREE END ARRANGED IN AN ADJACENT CIRCULAR ZONE CONCENTRIC WITH AND IN SUBSTANTIALLY THE SAME PLANE AS THE CIRCULAR PATH FOR CREATING AN ELECTROMAGNETIC FIELD BETWEEN THE ZONE AND THE PATH TO CAUSE SAID POLE TO ATTRACT SAID ARMATURE MEANS, SHORT-CIRCUIT COIL MEANS SURROUNDING SAID POLE ADJACENT THE FREE ENDS THEREOF AND ARRANGED TO EXPOSE THE FREE ENDS OF SAID
References Cited (Backward Citations)
US2765433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |