Method and apparatus for detecting contamination of liquids
US4106331A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 1977 |
| Grant date | Aug 15, 1978 |
| Priority date | — |
| Expiry date | May 6, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/2835
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for detecting contamination of a liquid, particularly a Quench Oil, comprises introducing a sensing element at a high temperature into a liquid, allowing the sensing element to commence cooling, and thereafter timing the cooling of the sensing element between two selected temperatures. The time thus measured is compared with a pre-set time, to provide an indication of contamination of the liquid. In apparatus for carrying out the method, a slug of stainless steel in which is embedded a thermo couple is heated in a furnace and then lowered into a receptacle containing the liquid under test. These operations, and the timing and comparison, are effected in a pre-determined automatic cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.