US3346749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-excited brushless alternator
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1965-02-02
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Granted: 1967-10-10
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Expires: 1985-02-02
Abstract
No abstract record available.
Inventors
- 👤 Robert J Shafranek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:33
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/16; H02K19/22; H02K19/24; H02K21/00; H02K21/38; H02K21/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
AN ALTERNATOR COMPRISING (A) A STATOR OF MAGNETIC MATERIAL, (B) MEANS DEFINING A PAIR OF WALLS OF MAGNETIC MATERIAL SPACED AXIALLY FROM OPPOSITE ENDS OF SAID STATOR, (C) FIELD MEANS FOR INDUCING A NORTH MAGNETIC POLE IN ONE OF SAID WALLS ANS A SOUTH MAGNETIC POLE IN THE OTHER OF SAID WALLS, (D) A ROTOR JOURNALLED FOR ROTATION WITHIN SAID STATOR AND INCLUDING A PAIR OF SECTIONS OF MAGNETIC MATERIAL RESPECTIVELY COUPLED MAGNETICALLY TO SAID WALLS, AND (E) A PERMANENT MAGNET MAGNETICALLY COUPLED BETWEEN SAID WALLS AND POSITIONED TO INDUCE A NORTH MAGNETIC POLE IN SAID ONE WALL AND A SOUTH MAGNETIC POLE IN SAID OTHER WALL.
Claim 2
Dependent Claim
107 words
AN ALTERNATOR COMPRISING (A) A STATOR OF MAGNETIC MATERIAL, (B) MEANS DEFINING A PAIR OF WALLS OF MAGNETIC MATERIAL SPACED AXIALLY FROM OPPOSITE ENDS OF SAID STATOR, (C) FIELD MEANS FOR INDUCING A NORTH MAGNETIC POLE IN ONE OF SAID WALLS ANS A SOUTH MAGNETIC POLE IN THE OTHER OF SAID WALLS, (D) A ROTOR JOURNALLED FOR ROTATION WITHIN SAID STATOR AND INCLUDING A PAIR OF SECTIONS OF MAGNETIC MATERIAL RESPECTIVELY COUPLED MAGNETICALLY TO SAID WALLS, AND (E) A PERMANENT MAGNET MAGNETICALLY COUPLED BETWEEN SAID WALLS AND POSITIONED TO INDUCE A NORTH MAGNETIC POLE IN SAID ONE WALL AND A SOUTH MAGNETIC POLE IN SAID OTHER WALL.
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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |