Particle size distribution analyzer
US4491926A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1982 |
| Grant date | Jan 1, 1985 |
| Priority date | — |
| Expiry date | Mar 1, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/132
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A particle size distribution analyzer includes a detector adapted to detect particles by electrical or optical differences from a medium containing the particles in dispersion and generate signals proportionally to the sizes of the detected particles, a threshold circuit adapted to remove noises or fragmental signals from the detected signals so as to obtain pulse widths at a constant position, a gate circuit adapted to decide the passage or non-passage of the particles through the threshold circuit, a counter circuit adapted to count the number of the particles fed from the gate circuit, a memory connected to the counter circuit, an arithmetic circuit connected to the memory and the detector, a controller circuit connected to the gate circuit, the memory and the counter circuit, and means for displaying or recording the data stored in the memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.