Spectroscopic cell system having vented dual windows

Details Spectroscopic cell system having vented dual windows Spectroscopic cell system having vented dual windows

1990-10-15

1992-06-09

McGraw, Vincent P.

Optics: measuring and testing

Sample, specimen, or standard holder or support

Fluid containers

73 40, 73 46, 250576, 356440, 340605, G01N 2105, G01M 304

Patent

active

051201291

ABSTRACT:
An improvement upon spectroscopic cells of the type that have a single window sealed to each window opening of the cell body. The improvement is: (1) to position an additional window at each such opening, each such window being juxtaposed, spaced apart and biplanar with each original window so that there is a sealed space between each additional window and each original window; and (2) to position at least two passageways through the body of the cell, each such passageway in fluid communication with each of the above formed sealed spaces so that any leakage of a sample past the original seal is vented from the cell via one of the passageways to a detector to be detected. In a highly preferred embodiment of the present invention each such sealed space contains a spacer ring and the body is provided with additional passageways so that a purge fluid, such as nitrogen, can be flowed through the passageways and the sealed space to a flow through detector, such as a thermal conductivity detector, to detect any leakage of a fluid sample past one of the original seals.

REFERENCES:
patent: 570726 (1896-11-01), Butts
patent: 1779076 (1930-10-01), Ray
patent: 3177706 (1965-04-01), Shuman et al.
patent: 4197531 (1980-04-01), Wentworth, Jr.
patent: 4283937 (1981-08-01), Aoki et al.

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