Doze alerting device
US6756902B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 12, 2001 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Mar 11, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B21/06
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A doze alerting device includes a casing, an earplug and an electronic operating circuit. The earplug is insertable into either the left or right ear of a user to locate the casing at a desired angular position. The circuit incorporates an audio generator for generating a doze-alert audio signal and a gravity switch for triggering the generator. The switch has first and second contacts closing to trigger the generator, with the second contact being movable under the influence of gravity along a path towards and away from the first contact. The path is fixed relative to the casing so that the switch provides a trigger signal when the casing moves from a first angular position corresponding to an upright position of the head when the user is looking straight ahead to a second angular position corresponding to a dipped position of the head when the user starts to doze. The path is linear so that the device can be used at either the left or the right ear of the user without any material effect on the angular positioning of the casing and the operation of the switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.