Dial switch having an ornamental colored ring
US7091434B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 2005 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Jun 7, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H19/025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dial switch disposed on a front surface of a control panel is surrounded by a colored ring which is visible from a front side of the control panel. Behind the front surface of the control panel, an ornamental prism made of a transparent material and a light source are disposed. A colored layer is formed on the rear surface of the ornamental prism so that a ring surrounding the dial switch is visible as a colored ring. The colored ring is visible through the transparent ornamental prism at the daytime and is visible by illumination of the light source in the nighttime. Since no light leaks bypassing the colored layer, the ring is perfectly colored. Since only the flat rear surface of the ornamental prism is covered with the colored layer, the ornamental prism can be manufactured in a simple process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.