Signaling device and method of alerting a work machine operator to a predetermined condition using same
US7508315B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 2005 |
| Grant date | Mar 24, 2009 |
| Priority date | — |
| Expiry date | Jun 4, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/54
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A signaling device includes an electrical circuit which discharges an electrical energy storage device through an electrically powered alert mechanism via a biased open transition switch upon disruption of electrical power in an electrical system of a work machine. A work machine is further provided having an alert device coupled with a normally closed electrical power circuit, the alert device being activated upon opening of the normally closed electrical circuit via a transistor switch. An associated method includes using the signaling device to alert a work machine operator to a predetermined condition by closing a normally open electrically switch to connect an electrical energy storage device with an electrically powered alert mechanism, via an electronic controller or via interruption of electrical power in a normally closed electrical circuit of a work machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.