A practical treatise on mechanical dentistry . part, for soldering with the use of blowpipes, is represented inFig. 5. It is called the Perfect Duplex Burner, and will befound very convenient for laboratory use. It is an important ad- Fig. vance beyond the well-known revolving form of duplex burners are fixed, and a small jet is placed between them,the gas flow being governed by a knob, a quarter turn of which tothe right or left ignites either burner when once the small jet is 3 34 MECHANICAL DENTISTRY. lighted. The plug has a long bearing, and is carefully ground inso as to e
A practical treatise on mechanical dentistry . part, for soldering with the use of blowpipes, is represented inFig. 5. It is called the Perfect Duplex Burner, and will befound very convenient for laboratory use. It is an important ad- Fig. vance beyond the well-known revolving form of duplex burners are fixed, and a small jet is placed between them,the gas flow being governed by a knob, a quarter turn of which tothe right or left ignites either burner when once the small jet is 3 34 MECHANICAL DENTISTRY. lighted. The plug has a long bearing, and is carefully ground inso as to eliminate wear as far as possible. The knob is not af-fected by the heating up of either burner. The apparatus is wellmade, with every observed defect of the old form eliminated andevery shortcoming remedied. The old form was good; the newis better, and comes very close to fulfilling the intention of the in-ventor—to supply the need of metal-workers for a perfect self-lighting soldering and Bunsen burner combined. BLOWPIPES. Following the description of lamps and burners given in thepreceding pages, it would seem appropriate to consider next thevarious forms of blowpipes used in the application of the heatproduced by means of the appl
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectdentist, bookyear1903
