Apparatus for studying particles having an aperture whose cross-sectional area changes progressively along at least part of its length
US4926114A · kind A · utility
18Cited by
8References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 8, 1989 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Sep 8, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/13
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus and method for studying particles suspended in an electrically conducting fluid by providing an aperture with a current path therethrough, causing the fluid to flow through the aperture and detecting resistive pulses caused by the passage of suspended particles. Additional information about particle size is generated by designing the aperture such that its cross-section changes progressively along its length, and observing the duration of the resistive pulses, which duration varies with particle size. The method is particularly useful for the study of particles suspended in molten metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.