US3344338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamo electric machines
Assignee: Individual
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Filing: 1964-02-28
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Granted: 1967-09-26
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Expires: 1984-02-28
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Sparrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:05
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/16; H02K19/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A DYNAMO ELECTRIC MACHINE, COMPRISING: STATIONARY MEANS FOR GENERATING AN ALTERNATING ELECTRIC CURRENT IN THE PRESENCE OF A ROTATING MAGNETIC FIELD, ROTATABLE MEANS FOR PRODUCING A MAGNETIC FIELD WHEN EXCITED BY A DIRECT CURRENT, ROTATBLE MEANS FOR GENERATING AN ALTERNATING OUTPUT CURRENT, WHEN ROTATED IN A STATIONARY MAGNETIC FIELD, STATIONARY MEANS FOR PRODUCING A MAGNETIC FIELD WHEN ENERGIZED BY A DIRECT CURRENT, ROTATABLE RECTIFIER MEANS, CONNECTING SAID ROTATABLE GENERATING MEANS AND SAID ROTATABLE FIELD MEANS, FOR CONVERTING SAID ALTERNATING OUTPUT CURRENT, AND EXCITING SAID ROTATABLE FIELD MEANS, MEANS FOR SIMULTANEOUSLY ROTATING SAID ROTATABLE FIELD MEANS, SAID ROTATABLE GENERATING MEANS AND SAID ROTATABLE RECTIFIER MEANS, A MAGNETIC CIRCUIT INCLUDING SAID ROTAT-
Claim 2
Dependent Claim
110 words
A DYNAMO ELECTRIC MACHINE, COMPRISING: STATIONARY MEANS FOR GENERATING AN ALTERNATING ELECTRIC CURRENT IN THE PRESENCE OF A ROTATING MAGNETIC FIELD, ROTATABLE MEANS FOR PRODUCING A MAGNETIC FIELD WHEN EXCITED BY A DIRECT CURRENT, ROTATBLE MEANS FOR GENERATING AN ALTERNATING OUTPUT CURRENT, WHEN ROTATED IN A STATIONARY MAGNETIC FIELD, STATIONARY MEANS FOR PRODUCING A MAGNETIC FIELD WHEN ENERGIZED BY A DIRECT CURRENT, ROTATABLE RECTIFIER MEANS, CONNECTING SAID ROTATABLE GENERATING MEANS AND SAID ROTATABLE FIELD MEANS, FOR CONVERTING SAID ALTERNATING OUTPUT CURRENT, AND EXCITING SAID ROTATABLE FIELD MEANS, MEANS FOR SIMULTANEOUSLY ROTATING SAID ROTATABLE FIELD MEANS, SAID ROTATABLE GENERATING MEANS AND SAID ROTATABLE RECTIFIER MEANS, A MAGNETIC CIRCUIT INCLUDING SAID ROTAT-
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) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |