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. 09, 1976
Filed:
Dec. 13, 1974
Hansjoerg Stern, Scotia, NY (US);
General Electric Company, New York, NY (US);
Abstract
A frequency modulated fluidic gauge having no moving parts for monitoring a characteristic of a continuously moving strand-like material. The gauge is comprised of a fluidic oscillator circuit including a fluidic amplifier, and a fluidic phase shifting network for fluidically coupling an output fluidic signal from an amplifier output port to an amplifier control input port at a phase angle that insures oscillation of an output signal from the amplifier output port at a predetermined frequency which is proportional to the characteristic of the material being monitored. The phase shifting network is comprised of a fluidic capacitor, an enclosed gauging channel for receiving the strand-like material passing therethrough, means for fluidically coupling the output signal from the amplifier output port to the gauging channel, and means for fluidically coupling at least a portion of the output signal to the fluidic capacitor and the amplifier control port. A part of the gauging channel, which receives that portion of the output signal passing between the walls of the gauging channel and the continuously moving strand-like material, defines a variable fluidic resistor, whereby the frequency of the oscillator output signal varies inversely as the product of the variable resistor and the fluidic capacitor.