Light fastness and weather resistance testing apparatus
US3983742A · kind A · utility
Inventor
Key dates
| Filing date | Dec 19, 1975 |
| Grant date | Oct 5, 1976 |
| Priority date | — |
| Expiry date | Dec 19, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N17/004
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved light fastness and weather resistance testing apparatus has a lamp housing having a closed bottom and sides and an open top, a specimen rack rotatably mounted for rotation around the outside of the lamp housing, a testing vessel around the lamp housing and having a top with an opening therein over the lamp housing and within which the specimen rack is located, and having an inlet port and an exhaust port and a recirculation conduit for recirculating exhaust gas from the testing vessel, gas circulating means and gas humidifying means between the recirculation conduit and the testing vessel inlet, electrode means suspended in the lamp housing and electrode moving means coupled to the upper electrode of the electrode means for raising and lowering the upper electrode. An annular ceiling plate is provided above the lamp housing and spaced from the top of the testing vessel and has a cylindrical wall portion depending therefrom into the lamp housing with the cylindrical wall portion spaced from the edge of the opening in the top of the testing vessel, and an exhaust hood is mounted on the top of the testing vessel over the opening and has a substantially inverted funnel shap…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.