A practical treatise on mechanical dentistry . eredto any height and turned in any direction. A touch will directthe flame on any point while the blowpipe stands in the sameposition on the table; there being no necessity for raising, lower-ing, or adjusting work before it. Macombers gas blowpipe, Fig. 14, differs somewhat in construc-tion from the latter, its capability of adjustment being regulated bya ball-and-socket attachment which imparts to it, at the will of theoperator, a latitude of movement or adjustment of the blowpipepoint that is practically without limit. The direction of the poi
A practical treatise on mechanical dentistry . eredto any height and turned in any direction. A touch will directthe flame on any point while the blowpipe stands in the sameposition on the table; there being no necessity for raising, lower-ing, or adjusting work before it. Macombers gas blowpipe, Fig. 14, differs somewhat in construc-tion from the latter, its capability of adjustment being regulated bya ball-and-socket attachment which imparts to it, at the will of theoperator, a latitude of movement or adjustment of the blowpipepoint that is practically without limit. The direction of the point,1, is regulated by the joint, 3, and the supply of gas controlled by GENERATION AND APPLICATION OF HEAT. 41 the stop-cock, 2. The air is supplied by the bellows through theflexible tube. A very convenient, manageable, and effective instrument formany purposes requiring the application of heat in the dentallaboratory is the hand blowpipe shown in Fig. 15. It is capableof producing very high degrees of heat, but the intensity of the Fig. latter may be graduated at the will of the operator, as the stop-cocks, which are both under perfect control of the thumb ofthe hand which holds the blowpipe, regulate the supply of gas,and control the volume of air. The air-jet is */& of an inch bore,and requires a supply from a bellows. Fig. 16.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectdentist, bookyear1903
