Novelty magnetic top
US5007877A · kind A · utility
8Cited by
3References
9Claims
0Family size
Inventor
Key dates
| Filing date | Jan 16, 1990 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Jan 16, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63H1/28
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A permanent magnetic top is arranged to rotate on one or more surfaces, of a toy induction turret, which are in close proximity to a coil. An electric circuit is arranged to switch the coil in such a manner so as to accelerate the top. A handle is connected to the turret so that the top may be skillfully transferred from one surface to another. In one version it is arranged to generate a tone or musical notes when the top is spinning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.