The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 1984
Filed:
Mar. 19, 1981
Colin A Simpson, Iver, GB;
Graviner Limited, , GB;
Abstract
Apparatus for detecting oil mist or other light-affecting contamination in a fluid comprises a measuring chamber across which a light source directs a beam of light on to a photocell. Solenoid valves each control the connection of a respective inlet pipe (connected, for example, to a particular part of an internal combustion engine being monitored for oil mist) to the measuring chamber. The solenoid valves are operated in sequence so as to admit respective samples of the atmosphere into the measuring chamber where the degree of contamination is detected by the changing photocell output. The samples are drawn into the measuring chamber by suction from a fan unit. The fan unit is also connected by a by-pass chamber and by-pass pipes in the individual valve units to the inlet pipes on the upstream sides of the valves. In this way, the inlet pipes are kept charged with atmosphere from the areas being monitored so that each sample is very rapidly sucked into the measuring chamber when a valve is opened.