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:
Nov. 17, 1992
Filed:
Feb. 19, 1991
John R Secord, Port Huron, MI (US);
Bindicator Company, Port Huron, MI (US);
Abstract
A system for sensing the presence of or level of material within a vessel that includes a light transmitting probe extending into the vessel through a wall of the vessel from externally thereof. The probe has a lens with a closed end within the vessel for contact with the material sought to be detected, and a light source/sensor unit positioned externally of the vessel. The light source/sensor unit directs light energy through the lens of the probe to the closed end of the lens, which is within the vessel. The source/sensor unit detects the presence of material in contact with the closed end of the lens as a function of light energy reflected back to the source/sensor unit. The light source/sensor unit is removably mounted on the lens so that the source/sensor unit may be removed from the lens for service without removing the lens itself from the vessel wall.