Trick action type clock
US6229768A · kind A · utility
28Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1999 |
| Grant date | May 8, 2001 |
| Priority date | — |
| Expiry date | Jan 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B45/0007
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A trick action type clock, wherein a dial plate which is arranged in front of ornaments is made of left and right side dial plates mating along a line passing through a center of rotation of the hands. A planetary gear mechanism actuates the left and right side dial plates so as to make them rotate and revolve around the center of rotation of the hands to produce an opening and closing motion. Therefore, the dial plate made of the two mating parts performs an opening and closing motion which produces a strong impression due to the surprising dynamic change.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.