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:
Jan. 14, 1986
Filed:
Aug. 21, 1984
Henry E Karrer, Palo Alto, CA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
Apparatus comprising a test chamber, an electric solenoid and a pressure detector is provided to measure the partial pressure of oxygen contained in a mixture of gases. As a result of the paramagnetic properties of oxygen, an acoustic wave is produced in the gas mixture by the application of a pulsed magnetic field. The magnitude of the dynamic acoustic wave is dependent on the amount of oxygen present in the gas mixture. The solenoid generates a pulsating magnetic field in response to an electric signal provided by a signal source. The pressure detector measures the magnitude of the resulting acoustic wave and provides a signal whose amplitude is directly proportional to the amount of oxygen present in the sample gas.