Radiant electric heaters
US5049726A · kind A · utility
8Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1990 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | Nov 20, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/742
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A radiant electric heater has one or more infra-red image (22, 24) having a relatively high temperature coefficient of resistance. To reduce the inrush current when the lamps are first energized, a series resistance coil (54) is provided together with circuitry (64, 68, 70) to bypass the series resistance after a short time interval. Because the energy dissipated in the coil is relatively limited. It can be concealed beneath a peripheral insulating well (18) of the heater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.