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:
May. 03, 1988
Filed:
Oct. 06, 1986
Carl A Farren, Placentia, CA (US);
James H Crabtree, Long Beach, CA (US);
Beckman Industrial Corporation, LaHabra, CA (US);
Abstract
The present invention relates to a gas chromatography assembly comprising a high mass, thermally conductive body provided with at least one cell in which is disposed a resistance filament for the detection of a sample gas. Lines are provided for communication between the cell and sample gas and carrier gas from chromatographic separation columns. The conductive body is adapted to carry the separation columns in heat transfer relationship therewith. In accordance with the present invention, the assembly components, including the interior of the cell and the separation columns are heated with a single heating element, which is controlled by a single heating element control means. The temperature of the environment of the sensor, switching valves and the separation columns, are thus controlled through a single constant temperature control system. Each element of the assembly is provided with sufficient surface area at the point where it is joined with an adjacent element of the assembly to define a flame path of sufficient length to prevent the escape of a flame from between the contiguous elements.