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:
Jun. 29, 1982
Filed:
Jun. 03, 1980
Richard H Curtis, Gorham, ME (US);
Hague International, S. Portland, ME (US);
Abstract
The gas sampling apparatus may be embodied as a hot sampler or a cold sampler, and basically comprises an insulated housing concentrically supporting an inlet tube which in turn supports a nozzle through which the gas sample is metered, passing to the detection cell. The gas sample is drawn past the cell by an aspirator. A controllable heater is disposed concentrically about the inlet tube and proximate to the aspirator for maintaining the sensing cell at its perferred operating temperature which in one case is 704.degree. C. The aspirator is preferably maintained above 430.degree. C. but below 590.degree. C. by the heater. By maintaining the sample gas in this elevated temperature range, accumulation of residuals of the process are avoided. Provision is made for periodic purging of the apparatus with fresh air to remove residuals from the sampler.