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:
Feb. 10, 1976
Filed:
Dec. 17, 1974
Peter J Clack, Doylestown, PA (US);
George R Moreland, Green Lane, PA (US);
Leeds & Northrup Company, North Wales, PA (US);
Abstract
An auto-ranging glucose measuring system including a device capable of mixing a glucose containing solution and a diluent in a variable ratio, a glucose oxidase enzyme converter column for converting the diluted glucose solution to hydrogen peroxide as one of the products, an amperometric detector for producing an analog electric signal proportional to the concentration of hydrogen peroxide, a high-low limit circuit for producing a pulse output when the analog electric signal is greater than the preset high limit of the linear span of the detector or is less than the preset low limit of the noise level of the detector, an electronic motor speed changing circuit interposed between a source of alternating current and a pump motor in said mixing device, having a frequency dividing network controllable by a register whose contents may be incremented or decremented by a pulse from the high-low limit circuit.