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:
Dec. 17, 1991
Filed:
Mar. 27, 1991
Applicant:
Inventors:
Jean-Luc Martinoli, Villeneuve La Garenne, FR;
Alain Rousseau, Paris, FR;
Pascal Vilain, Hadancourt le Haut Clocher, FR;
Assignee:
Servio, , FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
73 641 ; 422 72 ; 422 73 ; 356 39 ; 366273 ; 366274 ; 435 13 ; 436 69 ;
Abstract
A device for the measurement of time at which the physical state of a fluid medium is modified, comprises a vertical cup which contains the fluid and the necessary reagents, and in which a ferromagnetic ball is placed and is driven in rotation by an external magnetic field. The cup has at its lower part an annular travel path for the ball and it comprises a detection device which delivers an electric signal whenever the ball passes in front of it which is associated with a measurement unit determining the variation of the time interval between two consecutive passages of the ball.