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:
Dec. 03, 1985
Filed:
Jun. 27, 1984
Hal C Danby, Palo Alto, CA (US);
Carl Ritson, San Jose, CA (US);
Anatros Corporation, San Jose, CA (US);
Abstract
The refractive optical pressure sensor of this invention is a system for measuring the pressure of a liquid comprising a light source, a light detector and a capillary formed in a transparent solid. A refractive surface of the capillary is positioned in the light path of light from the light source. A light detector is positioned in the path of light originating from the light source which has been refracted by the refractive surface of the capillary filled with air but outside of the path of light which has been refracted by the refractive surface of the capillary filled with liquid. The inlet end of the capillary is open for communication with liquid to be monitored for pressure, and the other end of the capillary is closed or communicates with a closed reservoir. Small changes in liquid pressure change the amount of liquid in the capillary passageways, causing an easily detected change in sharply refracted light.