Century Dictionary and Cyclopedia
- n. A kind of huge stuffing-box used in a method of sinking shafts invented by M. J. Chaudron, a Belgian engineer, for preventing water from entering at the bottom of the tubing. It consists of flanged rings arranged to form an annular box, in which moss is placed to form a packing and compressed by the weight of the superincumbent tubing, thus permanently stopping the inflow of water from upper strata which would otherwise descend outside the tubing and enter the pit at the bottom.
“Under such circumstances, Mr. Chavatte considered this moss-box as more detrimental than useful, and not at all indispensable, and so substituted beton for it, as had previously been done by Mr. Bourg, director of the Bois-du-Luc coal mines.”
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