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, 2014
Filed:
Aug. 14, 2006
Joseph R. Feldkamp, Appleton, WI (US);
Jeffrey R. Heller, Neenah, WI (US);
Shawn J. Sullivan, Neenah, WI (US);
Joseph R. Feldkamp, Appleton, WI (US);
Jeffrey R. Heller, Neenah, WI (US);
Shawn J. Sullivan, Neenah, WI (US);
Kimberly-Clark Worldwide, Inc., Neenah, WI (US);
Abstract
An oscillator provides a reference signal having a phase. A tunable reactive circuit, including an induction coil, is driven by the fixed frequency reference signal of the oscillator with coil adapted to be positioned adjacent the specimen to generate an oscillating signal corresponding to the condition of the specimen. The tunable reactive circuit provides an output signal having a parameter indicative of the condition of the specimen. A resonant control circuit compares the reference signal to the oscillating signal and provides to the tunable reactive circuit a resonance control signal representative of the comparison. The resonance control signal tunes the tunable reactive circuit, which may be a series RLC circuit, so that the frequency of the oscillating signal is substantially constant.