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:
Aug. 08, 1978
Filed:
Mar. 31, 1976
Larry G Stolarczyk, Raton, NM (US);
A. R. F. Products, Inc., Raton, NM (US);
Abstract
A biochemical oxygen demand measuring device which utilizes the decrease in pressure in an air space above the sample under measurement in a sealed reaction vessel to actuate an oxygen generator which utilizes an electrolysis cell communicating with the reaction vessel. The quantity of oxygen supplied by the oxygen generator is a measurement of the biochemical oxygen demand and is proportional to the quantity of electricity used in the electrolysis cell. Electrical pulses in a chain of constant amplitude and constant duration are applied to the electrolysis cell and the chain of pulses is interrupted by means responsive to the pressure in the reaction vessel to maintain the pressure in the reaction vessel constant. A counter is employed to count the pulses over a period of time as a measurement of the oxygen taken up by the reaction in the pressure vessel. A barometric correction device is employed with a sensing electrode in the electrolysis cell to control the pulses of electrical energy.