Rotary indicating device
US4631848A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1985 |
| Grant date | Dec 30, 1986 |
| Priority date | — |
| Expiry date | May 21, 2005 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63H33/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The disclosure relates to a rotary indicating device adaptable to, for example, wheel covers for motor vehicles. The device includes a rotary base member having, on its front or rear surface, a plurality of indication regions which respectively consist of completely the same desired images and arranged at equal angular intervals about a rotary axis of the rotary base member. When the rotary base member rotates at more than a predetermined rotational speed, an observer located at a predetermined position with respect to the device can view a distinct constant image, appearing at a predetermined position of the rotary base member, due to the after image phenomenon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.