US3342998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring-driven electrical generator
Assignee: Fidelity Electric Co Inc
•
Filing: 1965-04-01
•
Granted: 1967-09-19
•
Expires: 1985-04-01
Abstract
No abstract record available.
Inventors
- 👤 Walter F Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:27
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/18; H02K7/1807; H02K7/1853
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
AN ELECTRICAL GENERATING APPARATUS COMPRISING AN ELECTRICAL GENERATOR INCLUDING A ROTATABLE ARMATURE AND A STATIONARY MAGNETIC STRUCTURE, A SUBSTANTIALLY ZERO GRADIENT CONSTANT TORQUE SPRING MEANS FOR ROTATABLY DRIVING SAID ARMATURE COMPRISING A SPRING MEMBER HAVING A PRESET CURVATURE BUT ADAPTED TO BE WOUND REVERSELY TO ITS PRESET CURVATURE, MEANS FOR WINDING SAID SPRING MEMBER REVERSELY TO ITS PRESET CURVATURE, MEANS FOR RELEASING THE WOUND SPRING MEMBER, AND MEANS TRANSMITTING THE FORCE OF THE UNWINDING SPRING MEMBER TO SAID ROTATABLE ARMATURE WHEREBY TO ROTATE SAID ARMATURE.
Claim 2
Dependent Claim
85 words
AN ELECTRICAL GENERATING APPARATUS COMPRISING AN ELECTRICAL GENERATOR INCLUDING A ROTATABLE ARMATURE AND A STATIONARY MAGNETIC STRUCTURE, A SUBSTANTIALLY ZERO GRADIENT CONSTANT TORQUE SPRING MEANS FOR ROTATABLY DRIVING SAID ARMATURE COMPRISING A SPRING MEMBER HAVING A PRESET CURVATURE BUT ADAPTED TO BE WOUND REVERSELY TO ITS PRESET CURVATURE, MEANS FOR WINDING SAID SPRING MEMBER REVERSELY TO ITS PRESET CURVATURE, MEANS FOR RELEASING THE WOUND SPRING MEMBER, AND MEANS TRANSMITTING THE FORCE OF THE UNWINDING SPRING MEMBER TO SAID ROTATABLE ARMATURE WHEREBY TO ROTATE SAID ARMATURE.
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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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |