US3213307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator connections support construction
Assignee: Skil Corp
•
Filing: 1962-09-13
•
Granted: 1965-10-19
•
Expires: 1982-09-13
Abstract
No abstract record available.
Inventors
- 👤 David N Summerfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:55
CPC Classifications
H; H02; H02K; H02K13/00; H02K13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
IN AN ARMATURE FOR A DYNAMO-ELECTRIC DEVICE HAVING A SHAFT, A COMMUTATOR ON SAID SHAFT FORMED BY A PLURALITY OF COMMUTATOR BARS IN INSULATED SPACED RELATION, A STACK OF SLOTTED LAMINATIONS ON SAID SHAFT IN SPACED RELATION TO SAID COMMUTATOR, AND AN ARMATURE WINDING IN THE SLOTS OF SAID STACK OF LAMINATIONS HAVING END TURNS AT ONE END BETWEEN SAID COMMUTATOR AND SAID STACK, THE IMPROVEMENT COMPRISING, AN INNER ELASTIC INSULATING WASHER INTERPOSED BETWEEN SAID COMMUTATOR AND SAID END TURNS, LEAD WIRES FROM SAID COMMUTATOR BARS TO SAID ARMATURE WIND-
Claim 2
Dependent Claim
90 words
IN AN ARMATURE FOR A DYNAMO-ELECTRIC DEVICE HAVING A SHAFT, A COMMUTATOR ON SAID SHAFT FORMED BY A PLURALITY OF COMMUTATOR BARS IN INSULATED SPACED RELATION, A STACK OF SLOTTED LAMINATIONS ON SAID SHAFT IN SPACED RELATION TO SAID COMMUTATOR, AND AN ARMATURE WINDING IN THE SLOTS OF SAID STACK OF LAMINATIONS HAVING END TURNS AT ONE END BETWEEN SAID COMMUTATOR AND SAID STACK, THE IMPROVEMENT COMPRISING, AN INNER ELASTIC INSULATING WASHER INTERPOSED BETWEEN SAID COMMUTATOR AND SAID END TURNS, LEAD WIRES FROM SAID COMMUTATOR BARS TO SAID ARMATURE WIND-
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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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |