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:
Oct. 17, 1989
Filed:
Jul. 03, 1986
Jaeger, Levallois Perret, FR;
Abstract
The invention relates to a device for detecting the presence of extraneous substances in a medium in the vicinity of a wall separating two mediums. The device provides in the medium I illumination of a wall under a radiation corresponding to the transparency of the semi-transparency of the material of the wall on a reference illumination zone. Directional detectors permit covering of the reference illumination zone, the mean direction of the reception cone having with respect to the mean direction of the beam an inclination such that the intersection volume of the beam and of the reception cone is a minimum. Application to the aid of driving of automobiles or airplanes and the control of industrial chemical processes is disclosed.