US3858071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency, low inductance generator
Assignee: International Business Machines Corp
•
Filing: 1970-05-28
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Granted: 1974-12-31
•
Expires: 1990-05-28
Abstract
Abstract A brushless dynamo-electric machine in which the armature is formed by a flat zigzag printed circuit winding and the rotating field pieces are energized by an annular field winding on the stator.
Inventors
- 👤 B Griffing
- 👤 J Glockler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:09
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/26; H02K19/00; H02K19/16; H02K19/18; H02K19/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
A brushless, high frequency alternator comprising: a rotor having a plurality of metal polE pieces mounted on and in spaced relation around the periphery of said rotor for rotation therewith; a stator having an annular field winding mounted thereon and passing through a cut out portion of said metal pole pieces of said rotor for exciting said metal pole pieces; said stator including a zigzag armature winding mounted thereto in an air gap formed by said metal pole pieces of said rotor.
Claim 2
Dependent Claim
82 words
A brushless, high frequency alternator comprising: a rotor having a plurality of metal polE pieces mounted on and in spaced relation around the periphery of said rotor for rotation therewith; a stator having an annular field winding mounted thereon and passing through a cut out portion of said metal pole pieces of said rotor for exciting said metal pole pieces; said stator including a zigzag armature winding mounted thereto in an air gap formed by said metal pole pieces of said rotor.
Claim 3
Dependent Claim
34 words
A brushless, high frequency alternator as in claim 1 further comprising drive means connected to said rotor for driving said metal pole pieces to induce a high frequency current in said zigzag armature winding.
Claim 4
Dependent Claim
35 words
A brushless, high frequency alternator according to claim 1 further comprising electrical current input means connected to said zigzag armature winding for creating a magnetic field to drive said rotor to produce a mechanical output.
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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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |