Measuring station for a photometer
AssigneeLaboratorium Prof. Dr. Rudolf Berthold
InventorWilly Lohr
Life of this patent
Estimating the term…
Abstract
A measuring station for a photometer has an aperture which connects a measuring chamber and the environment and through which a sample vessel can be introduced into the measuring chamber and/or removed from the measuring chamber. The sample vessel is raised and lowered by a plunger which is adapted to seal against the aperture by means of a sealing element. The sealing element has a first position in which its periphery circumscribes a smaller area than the internal clear cross-section of the aperture, to permit the sample vessel to be lifted into the chamber. The sealing element can then be expanded radially into sealing engagement with the aperture to seal the plunger to the walls of the aperture to prevent ingress of light.
Claims19
A measuring station for a photometer comprising:
- a hollow measuring chamber, said hollow measuring chamber having at least one aperture therein, said at least one aperture connecting the interior of said hollow measuring chamber with the exterior thereof;
- a plunger for introducing a sample into said hollow measuring chamber through said at least one aperture;
- and
- a sealing element on said plunger, said sealing element having a first position in which the area circumscribed by the periphery of said sealing element is less than the minimum cross-sectional area of said aperture, and being expandable radially relative to said plunger to a second position;
- and
- wherein expansion of said sealing element when said sample is introduced into said hollow measuring chamber seals said plunger to said measuring chamber in said aperture.
Dependencies are inferred from the claim text.