US3945146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gyroscopic top
Assignee: Individual
•
Filing: 1975-01-10
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Granted: 1976-03-23
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Expires: 1995-01-10
Abstract
Abstract A gyrotype toy top embodying a casing housing a rotor on a shaft having a spinning tip thereon, and a biased combined starter element and clutch member for effecting the engagement of the clutch member with the rotor upon the application of a pulling force to one section of a cord extending exteriorly of the casing to unwind a tensioned section of the cord pre-wound on the starter element whereby to initiate the spinning of the top.
Inventors
- 👤 Paul L. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:50
CPC Classifications
A; A63; A63H; A63H1/00; A63H1/02; A63H1/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
208 words
A gyroscopic top comprising a hollow casing, a starter element mounted for oscillation within said casing, a coil spring connected to and wound about said starter element and connected to said casing, a male clutch member on said starter element, a starter cord having a portion thereof pre-wound on said starter element and having a finger-grip portion thereof projecting outside of said casing, a vertically arranged shaft mounted for rotation in said casing, said shaft having a spinning tip thereon, a rotor on said shaft, and a female clutch member on said rotor; exertion of an outward pulling force on said finger-grip portion of said starter cord effecting the unwinding of pre-wound portion of said cord and the simultaneous movement of said starter element in one direction of oscillation to engage said male clutch member with said female clutch member thereby to effect positive rotation of said rotor and the spinning tip of said shaft, release of said finger-grip portion of said cord effecting movement of said starter element in the opposite direction of oscillation to return the same to its initial position under the influence of said coil spring and the simultaneous re-winding of said portion of said starter cord on said starter element for subsequent activation.
Claim 2
Dependent Claim
208 words
A gyroscopic top comprising a hollow casing, a starter element mounted for oscillation within said casing, a coil spring connected to and wound about said starter element and connected to said casing, a male clutch member on said starter element, a starter cord having a portion thereof pre-wound on said starter element and having a finger-grip portion thereof projecting outside of said casing, a vertically arranged shaft mounted for rotation in said casing, said shaft having a spinning tip thereon, a rotor on said shaft, and a female clutch member on said rotor; exertion of an outward pulling force on said finger-grip portion of said starter cord effecting the unwinding of pre-wound portion of said cord and the simultaneous movement of said starter element in one direction of oscillation to engage said male clutch member with said female clutch member thereby to effect positive rotation of said rotor and the spinning tip of said shaft, release of said finger-grip portion of said cord effecting movement of said starter element in the opposite direction of oscillation to return the same to its initial position under the influence of said coil spring and the simultaneous re-winding of said portion of said starter cord on said starter element for subsequent activation.
Claim 3
Dependent Claim
49 words
A gyroscopic top as set forth in claim 1 wherein said starter element has an inclined arcuate race therein for movably seating said male clutch member and engaging said male clutch member with said female clutch member upon the outward pulling of said finger-grip portion of said starter cord.
Claim 4
Dependent Claim
59 words
A gyroscopic top as set forth in claim 2 wherein said male clutch member comprises a component normally loosely confined within said female clutch member with the bottom of said male clutch member seated in the deepest part of said race to be urged into full engagement with said female clutch member upon counter-clockwise movement of said starter element.
Claim 5
Dependent Claim
30 words
A gyroscopic top as set forth in claim 1 wherein said female clutch member comprises a hollow boss on said rotor defining a cavity for receiving said male clutch member.
Claim 6
Dependent Claim
45 words
A gyroscopic top as set forth in claim 1 wherein said casing defines an annular band portion on the exterior surface thereof upon which the top can be moved by gyroscopic rotation of said rotor in a number of linear directions on a flat surface.
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) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |