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. 09, 1996
Filed:
Mar. 03, 1995
Richard L Crawford, Attleborough, MA (US);
Arthur E Tobey, Salem, NH (US);
Thermo Jarrell Ash Corporation, Franklin, MA (US);
Abstract
A spectroanalytical system includes housing structure with vent structure open to the atmosphere; radiation dispersing apparatus in the housing structure for dispersing radiation into a spectrum for application to sensor apparatus; sample excitation apparatus for exciting sample material to be analyzed to spectroemissive levels for generating a beam of radiation for dispersion by the dispersing structure; a source of gas; structure for flowing gas from the source into the housing structure for exhaust from the housing structure through the vent structure at a flow rate that is less than one percent of the volume of the housing structure per hour; first control structure for maintaining the pressure of the gas in the housing structure at a constant (within about one millibar) pressure independent of atmospheric pressure; and second control structure for maintaining the temperature of the gas within the housing structure constant within about 0.1.degree. F. during system operation.