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. 13, 2008
Filed:
Jun. 26, 2007
Alessandro Scardovi, Todi, IT;
Alessandro Scardovi, Todi, IT;
Telecom Italia S.p.A., Milan, IT;
Abstract
The detecting system comprises a detecting circuit () made up of a transistor (T) in current generator configuration, connected in series with a resistance (Rs) and a capacitor () of known capacitance (Cx), the resistance Rs representing the resistivity of the liquid existing between two electrodes () plunged into the liquid. Thanks to the presence of the capacitor (), it is possible to detect the liquid level in relation to the integral of the current that charges the capacitor (), resistance Rs being such as to condition the charge time (Tp) of the capacitor (). Accordingly, the variations in the voltage drop (Vp) on Rs caused by successive charges of the capacitor () with a current of time Tp represent corresponding values of the level of the liquid.