Abstract: A carpet stay-nail tool for positively holding an area of carpet to a desired location during carpet stretching and laying operations. A basic necessity during carpet laying is keeping a first section of carpet temporarily secured while the balance of the carpet is stretched and fastened to its permanent position. The invention provides a plurality of nails configured together in a row which can be pounded through the carpet into the underlayment. Subsequently, the invention can be easily pried up and reused with no discemable damage to the carpet. For safety and convenience, the tool is configured in nesting pairs of nail rows so the nail points are covered and a second nail row is readily available.

Abstract: In a gas chromatography oven, the heated enclosure is designed to be of a low thermal mass to permit more rapid programmed temperature changes, and to provide good oven cooling for work on the columns between analyses. Easy access to the columns is desirable, and accordingly, the present invention provides a heating enclosure having a door and at least one chromatograph column supported on a wall of the enclosure with the wall being transverse to the door opening and with the wall being movable from a first position having the column in the enclosure to a second position having the column outside of the enclosure. In such a structure, access to the column can be made outside of the enclosure so that the enclosure itself can be made smaller and of lower thermal mass.

Abstract: Components eluted from a chromatographic column are conveyed to a detector through a conduit that is thermally conductive and in thermal contact with the detector so that negative thermal gradients are prevented when the detector is held at a temperature higher than that of the column.