Siemens Industry, Inc.

Siemens Applied Automation, Inc.

Eugene L Kesselhuth

Jeffrey Scott Spaulding

Dean Vinson Davis

Glen Eugene Schmidt

Kenneth L Gallaher

Jeffrey John Bolduc

Ray Dean Dorris

Albert Eugene Waldorf

The present invention is a method and apparatus for sampling a high-temperature gaseous process stream containing components with high boiling points. The sampling system is especially suited for instruments having extremely low pressure chambers, such as mass spectrometers. The invention reduces the condensation of high boiling point components of the sample in the sampling system without the necessity of maintaining extremely high temperatures. The gaseous sample is passed through an orifice from the high temperature stream into a lower-temperature zone of the sampling system where a low pressure is maintained by a vacuum pump. The low pressure reduces the boiling point of the sample components so they may be maintained in a gas phase without excessive heating. The low pressure sample is then introduced into an instrument chamber through a sample introduction valve.

Sampling system for introduction of high boiling point streams at low temperature

Method and apparatus for introduction of high boiling point streams at low temperature

An electrical feed through for use in a high temperature oven such as the oven in a gas chromatograph. The feed through includes printed circuit boards which are maintained in compression to prevent the boards from physically separating at the elevated temperatures used in the oven. The structure that provides the compression also does not allow any flexure, torsional or longitudinal stress on the boards. The boards include an enhanced connector pad which is made from a continuous annular copper ring which is connected to all of the conductive layers of the board.

High temperature oven electrical feed through

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Bartlesville, OK, United States of America

Eugene L Kesselhuth