公开(公告)号：CA1183897A

公开(公告)日：1985-03-12

申请号：CA405597

申请日：1982-06-21

Applicant: COULTER ELECTRONICS

Inventor： BRUNSTING ALBERT ,  HOGG WALTER R ,  NEWTON WILLIAM A

IPC: G01N15/00 ,  G01N21/85 ,  G01N27/02

Abstract: A particle analyzing apparatus comprising a reflector chamber containing an electrolyte and having a concave reflector surface with a first focus and a second focus; entraining structure, having an introduction tube for providing and moving a stream of particles suspended in an electrolyte solution through the first focus; a source of radiant energy for illuminating the particles as they pass through the first focus to produce a source of detectable radiation signals, which reflect off the concave reflector surface to be subsequently collected and analyzed; an exit tube coaxially aligned with the introduction tube; a sensing orifice mounted in the tip of the introduction tube or the exit tube; and a pair of energized electrodes disposed in the electrolyte solution on either side of the orifice, whereby the orifice creates a constricted electrical path in which the stream of particles generate electrical impedance signals as they move therethrough.

公开(公告)号：FR2530023A1

公开(公告)日：1984-01-13

申请号：FR8212005

申请日：1982-07-08

Applicant: COULTER ELECTRONICS

Inventor： BRUNSTING ALBERT ,  HOGG WALTER R ,  NEWTON WILLIAM A

IPC: G01N15/14 ,  G01N21/47 ,  G01N15/00 ,  G01N21/85 ,  G01N27/02

Abstract: The invention consists of a particle analysis device. According to the invention, it comprises a reflecting chamber 24 containing an electrolyte having a concave reflecting surface 14 with a first focus 16 and a second focus 18, a drive structure 36 having a tube 38 for directing a flow of particles in suspension in an electrolyte solution, a radiant energy source 26 illuminating the particles when they pass through the first focus to produce a source of detectable radiation signals reflected by the concave surface, an outlet tube 41 in coaxial alignment with the tube 38, a detection aperture 42 at the end of the tube 38 or of the tube 41, and two energised (excited) electrodes in the electrolyte solution on either side of the aperture, which thus creates a restricted electrical path where the flow of particles produces electrical impedance signals. The invention applies especially to electronic and optical measurement particle analysers.

公开(公告)号：CA1193470A

公开(公告)日：1985-09-17

申请号：CA439633

申请日：1983-10-25

Applicant: COULTER ELECTRONICS

Inventor： NEWTON WILLIAM A ,  GRAHAM MARSHALL D

IPC: G01N27/60

Abstract: The particle sensing field of an electrical analyzer is focused by use of pairs of electrodes positioned across the path of particle flow. The electrodes are oriented and/or energized so that their electrical fields bulge outward in the direction of the sensing field to narrow the width of the sensing field along the predetermined path. The electrode arrangements can be implemented in a flow cell, with or without a sensing aperture, or on the surface of a substrate.

公开(公告)号：DE3335882A1

公开(公告)日：1985-04-11

申请号：DE3335882

申请日：1983-10-03

Applicant: COULTER ELECTRONICS

Inventor： NEWTON WILLIAM A ,  GRAHAM MARSHALL D ,  COULTER WALLACE H

IPC: G01N15/12 ,  G01N15/06 ,  G01N15/07

Abstract: The scanning field of an electrical particle analyser is focused by means of one or more electrode pairs arranged transversely to the direction of particle flow. In one embodiment, one of the electrodes has a very small width. In another embodiment, the electrodes are aligned and/or supplied with current in such a way that their electrical fields undergo cushion-type distortion outwards in the direction of the scanning field so as to constrict or to limit the width of the scanning field of a particular path. The electrode arrangement may be mounted either in a flow-type cell with or without a measurement opening or on a substrate.