Electrical appliance with delayed warning alarm
US4542284A · kind A · utility
6Cited by
18References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1983 |
| Grant date | Sep 17, 1985 |
| Priority date | — |
| Expiry date | Jan 7, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B21/185
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In combination with an electrical appliance, an automatic warning circuit to warn a user of an electrical hazard wherein the warning circuit comprises a timing circuit responsive to turn-off of the electrical appliance for generating a triggering signal after lapse of a predetermined time period after turn-off thereby to energize an audible alarm. The timing circuit and alarm are useful for warning a user of the appliance of an electrical safety hazard brought out by the appliance being connected to a power line while not being used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.