Analog indicator with self-luminescent pointer
US5630373A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1994 |
| Grant date | May 20, 1997 |
| Priority date | — |
| Expiry date | Nov 16, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K2360/33
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A self-luminescent indicator which may be employed in a tachometer, a speedometer, or other such gauges in automotive vehicles. The self-luminescent indicator comprises an indicating pointer, a luminescent element for emitting light, and a lens. The luminescent element is disposed in the indicating pointer. The lens is arranged in the indicating pointer and includes a flat surface through which light emitted from the luminescent element enters and a corrugated surface which projects the light entering the flat surface out of the indicating pointer. With this arrangement, the indicating pointer projects the light having uniform and high brightness to an observer for improving the visibility of pointer deflection over a dial plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.