Electrical switch and circuitry for appliance
US4829390A · kind A · utility
20Cited by
5References
17Claims
0Family size
Inventor
Key dates
| Filing date | Sep 15, 1986 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Sep 15, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2039/008
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A safety device for disconnecting an electrical appliance from a power supply, and thereby preventing electrical shock hazards. A normally closed switch connects the appliance to the power supply. A frangible device, such as a flash bulb, maintains the switch in the closed position. A sensor detects a dangerous condition and actuates the flash bulb, which action fragments the envelope of the bulb, whereupon the switch assumes the open position, thereby disconnecting the appliance from the power supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.