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:
Sep. 19, 2006
Filed:
Aug. 23, 2004
Applicant:
Alvin R. Wirthlin, Lucas, TX (US);
Inventor:
Alvin R. Wirthlin, Lucas, TX (US);
Assignee:
Opti Sensor Systems, LLC, Lancaster, VA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 15/06 (2006.01); G01N 21/85 (2006.01); G01N 21/49 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical transducer for determining the presence or absence of liquid or the like in a reservoir includes an electrical circuit with a pulse generator and processing electronics to filter out ambient light and compensate for temperature changes. A comparator circuit portion includes a pair of comparators that simultaneously output high and low signals when in the presence of liquid. One of the outputs can be selected to drive an indicator, pump, relay or the like.