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:
Apr. 17, 1984
Filed:
Jan. 24, 1983
David N Alftine, Bettendorf, IA (US);
Litton Systems, Inc., Davenport, IA (US);
Abstract
A monitoring system for determining the concentration of oxygen in the product gas of an oxygen enriching system comprises a plurality of pneumatic nor gates. Means are provided for coupling the outlet port of each gate to the control port of the subsequent gate to form a closed loop and a plurality of molecular sieve beds are pneumatically connected one each to the control port of the nor gates. The molecular sieve beds adsorb oxygen from the product gas to attenuate the rate of pressure change in the control ports and thus, the oscillation frequency of the monitor. The oxygen concentration of the product gas may be inferred from the oscillation frequency of the monitor.