High illumination alarm clock
US6366539B1 · kind B1 · utility
Inventor
Key dates
| Filing date | May 5, 2000 |
| Grant date | Apr 2, 2002 |
| Priority date | — |
| Expiry date | May 5, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B19/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An alarm clock comprises a seat, a switch, a light emitter, a light guiding plate, a light shielding layer, a timer, a transparent mask, a frame, and a power source. The timer is installed in the seat and drives a rotary shaft to pass out through the light shielding layer and the light guiding plate to be connected to indicators. The surface of the light guiding plate is arranged with scales and numeral indicators. A frame is fixed at a periphery of the seat, and after the light guiding plate and the light shielding layer are positioned, a transparent mask is connected to the inner side of the frame. The seat supports a light emitter and a light emitter switch which are connected with one another. The switch is connected to a power source. Pressing the lateral side of the transparent mask operates the light emitter switch. The light emitter will be energized and thus light up, so that the light from the light emitter passes through a light guide seat of the light guiding plate to all the indicators on the light guiding plate. The light shielding layer provides a higher illumination to all the indicators so that time indicators on the panel can be easily seen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.