The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 1982
Filed:
Feb. 23, 1981
Erling G Berglund, Jarfalla, SE;
Hans J Krook, Sollentuna, SE;
Clinicon AB, Bromma, SE;
Abstract
An apparatus for oscillating a test tube so as to agitate the content thereof, comprises an annular holder from which the test tube can be hung by means of a flange located on the upper end of the test tube, in a manner such that the test tube is restricted swingable outwardly in all directions from its vertical rest position. Mounted externally of the test tube bottom is a plate of soft-magnetic material or a plate-shaped permanent magnet with its magnetic axis coinciding with the axis of the test tube. A plurality of electromagnets for example four in number, are stationarily arranged with their respective first poles located in a common horizontal plane at a distance beneath the lower end of the test tube, in a manner such that the poles lie on a circle concentrical about the vertical rest position of the test tube. The opposite second poles of the electromagnets are connected to a common, soft-magnetic pole piece, and the electromagnets are energized in a predetermined sequence and in predetermined directions, so that as a result of the co-action of said first poles of the electromagnets and the soft-magnetic plate or plate-shaped permanent magnet on the test-tube, the test-tube is caused to effect a nutational rotation about the vertical rest position, with the apex of the nutational rotation located substantially in the center of the annular holder.