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:
Jul. 17, 1979
Filed:
Jun. 05, 1978
Markus Feier, Regensdorf, CH;
Contraves AG, Zurich, CH;
Abstract
A method of, and apparatus for analyzing particles suspended in a liquid, especially blood cells wherein two vessels or receivers for the liquid containing the suspended particles therein are separated by an electrically insulating wall and an elongate channel penetrates through such wall. Two supply electrodes each respectively connected with one terminal of an electrical power supply contact the liquid in a respective one of the vessels. There is provided at least one auxiliary electrode contacting the liquid in the channel, and the dimensions of each such auxiliary electrode, in a direction parallel to the lengthwise direction of the channel, is small in relation to the length of the channel. There also are provided a number of feeler or sensor means, a respective one of which is operatively associated with a respective pair of the electrodes for detecting the changes, as a function of time, of the potential difference between these electrodes. There is formed an auxiliary value correlated to the timewise course of the potential difference between a given one of the auxiliary electrodes and one of the other electrodes and there is formed a measuring value correlated to the time-wise course of the potential difference between two of the other electrodes. There is triggered sampling of the measuring value for obtaining a sampling value as a function of auxiliary value and corresponding to a particle.