Device for the determination of the soot content of an oil sample

• US 4,495,417 A
• Filed: 10/21/1982
• Issued: 01/22/1985
• Est. Priority Date: 11/07/1981
• Status: Expired due to Fees

• Current Assignee: Mobil Oil Corporation (Exxon Mobil Corporation)
• Original Assignee: Mobil Oil Corporation (Exxon Mobil Corporation)
• Inventors: Hohensang, Lutz
• Primary Examiner(s): Howell, Janice A.
• Application Number:
  US06/435,787
• Time in Patent Office: 824 Days
• Field of Search: 250/301, 250/308, 250/338 R, 250/339, 250/341, 250/343, 73/61.3, 73/64, 356/70, 356/440, 313/112
• US Class Current: 250/343
• CPC Class Codes: G01N 21/3577 for analysing liquids, e.g. polluted water
• CPC Class Codes: G01N 33/2888 Lubricating oil characteristics, e.g. deterioration lubricating properties G01N33/30

Abstract

A device for the detection of soot content of an oil sample is provided comprising a source of infrared radiation, an oil-sample receptacle of infrared permeable material, an infrared detector and an independent power means.

Claims

1. An apparatus for determining the soot content of an oil sample comprising a source of infrared radiation, an oil-sample receptacle of infrared permeable material and an infrared detector and a power source, said apparatus having one side or an aperture in said side of the oil-sample receptacle form a part of the bulb of a small incandescent lamp containing said source of infrared radiation and having the infrared detector placed on the side opposite the oil-sample receptacle.

2. The apparatus of claim 1 wherein the side or the aperture in the side of the oil-sample receptacle is made of calcium fluoride.

3. An apparatus in accordance with claims 1 or 2 wherein the oil-sample receptacle is a narrow test tube having a narrow, hollow space therein for sample material between the sides of the oil-sample receptacle.

4. The apparatus as defined in claim 3 wherein the hollow space provided for the oil-sample is connected to an inlet and an outlet duct.

5. The apparatus as defined in claim 1 wherein the power source is a flashlight battery of suitably low voltage.

6. An apparatus as defined in claim 1 adapted for measuring physical properties other than the soot content of oil samples characterized by inserting at predetermined points in the path of the infrared radiation suitable filtering devices.

7. A method for determining the soot content of an oil-sample comprising exposing said sample to a source of infrared radiation in a device consisting essentially of a source of infrared radiation, an oil-sample receptacle of infrared permeable material and an infrared detector and a power source, said apparatus having one side or an aperture in said side of the oil-sample receptacle form a part of the bulb of a small incandenscent lamp containing said source of infrared radiation and having the infrared detector placed on the side opposite of the oil-sample receptacle.