Protective device for protection against radiation during welding
US4169655A · kind A · utility
25Cited by
11References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1976 |
| Grant date | Oct 2, 1979 |
| Priority date | — |
| Expiry date | Dec 23, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/911
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A protective device is disclosed which is useful in protecting an operator against radiation emitted during welding. The protective device, which is employed in the presence of a surrounding light source, includes an interference filter which has a spectrally selective portion with bands for one or more of the ranges of wavelengths present in the emission spectrum of the surrounding light source and a radiation absorbing portion which attenuates the radiation to a value harmless to the eye without interfering with the spectrally selective portion of the interference filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.