Instrument for determining the weight and active concentration of aerosols
Abstract
Abstract An instrument for monitoring industrial atmospheres for determining the weight and active concentration of aerosols, in which the weight of the dust precipitate collected on a filter is determined by the rate of absorption of the radiation of an external alpha particle radioactive source, and the active concentration of the aerosol is determined by measuring the background radiation of the sample. The radiation source and the detector are disposed directly in a gas conduit on both sides of the filter element, on which the aerosol samples are being collected. In order to measure the background radiation of the sample, the radioactive source can be withdrawn from the gas conduit. The instrument is furnished with a collimator in order to reduce the influence of the background activity of the sample on the measurements of the dust concentration.
Inventors
- 👤 Valentin Grigorievich Babich
- 👤 Alexander Kuzmich Kursky
- 👤 Konstantin Petrovich Markov
- 👤 Nikoali Vasilievich Ryabov
- 👤 Konstantin Nikolaevich Stas
Bibliographic Details
Claims Analysis
Total Claims: 2References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |