Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1987-10-27
1989-08-08
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
2503591, 2503601, 250341, 422 66, 436 23, G01J 336
Patent
active
048556017
ABSTRACT:
A method and device for automatic spectrometric analysis of a liquid, particularly of milk, is provided. A plate with an aperture is inserted into a cell containing the liquid. The plate is then withdrawn from the cell, leaving the aperture filled with a defined volume of the liquid. A jet of air is used to deposit the volume of liquid onto a plaque. The plaque is then moved into vertical alignment with the spreading device. The spreading device includes a bent wire rotatable by, for example, a motor for spreading the liquid into a circular spot. Preferably, the spot is dried while it is being spread. The plaque is then moved adjacent to a spectrometric analysis device for, for example, passing infrared radiation through the sample and to a detector, preferably configured to detect several wavelengths. The plaque carrying the sample is then moved to a cleaning station where it is cleaned by wiping the spot, preferably with a tape of filter paper wetted with detergent or solvent.
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Howell Janice A.
Rauchholz William F.
Societe Civile de Brevets, J.L.S.
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