Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1984-06-29
1986-01-07
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250341, 2503591, 356 36, 356445, G01N 2135, G01N 2155
Patent
active
045635811
ABSTRACT:
The invention relates to an arrangement in an infrared analyzer for determining the proportion of a given substance or substances in a powderous material, such as flour. When making an analysis, the infrared analyzer irradiates the material with infrared light and detects light reflected from the material through a window in the wall of a conduit, in which the material is passed in a direction substantially parallel with the window. During the analysis, the material is held stationary, and compacted in the conduit. The conduit has arranged therein a feed screw having a controllable drive-means in a material-infeed end, and extends horizontally or slopes upwardly from the aforementioned infeed end. A control means steers the drive means and the analyzer cyclically in a manner such that during a first time interval the drive means is activated and the analyzer inactivated, and that during a second time period the analyzer is activated and the drive means inactivated.
REFERENCES:
patent: 3263801 (1966-08-01), Dudte
patent: 3328587 (1967-06-01), Brown et al.
patent: 4040747 (1977-08-01), Webster
patent: 4180331 (1979-12-01), Lundstrom
patent: 4400086 (1983-08-01), Webster
patent: 4479055 (1984-10-01), Perten
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