A practical treatise on mechanical dentistry . 44 MECHANICAL DENTISTRY. OXYHYDROGEN BLOWPIPE. No dental laboratory appliance for heating purposes has everbeen devised that has attracted so much attention, or elicited suchcordial and unreserved praise by expert manipulators, as thatinvented by Dr. J. Rollo Knapp, of New Orleans, La., and shownin Fig. 20. It is described as being to all intents and purposes an oxy-hydrogen blowpipe divested of the cumbersome paraphernaliausually accompanying the latter, and reduced to a practical size Fig. and shape for soldering operations. It is essential
A practical treatise on mechanical dentistry . 44 MECHANICAL DENTISTRY. OXYHYDROGEN BLOWPIPE. No dental laboratory appliance for heating purposes has everbeen devised that has attracted so much attention, or elicited suchcordial and unreserved praise by expert manipulators, as thatinvented by Dr. J. Rollo Knapp, of New Orleans, La., and shownin Fig. 20. It is described as being to all intents and purposes an oxy-hydrogen blowpipe divested of the cumbersome paraphernaliausually accompanying the latter, and reduced to a practical size Fig. and shape for soldering operations. It is essentially an apparatusfor securing the consumption of hydrogen in a highly oxygenatedatmosphere, the resulting flame being second in intensity only tothat of the oxyhydrogen blowpipe proper. It will melt gold or itsalloys in quantities suited to its capacity almost instantly, withoutother exertion on the part of the operator than the adjustment of acouple of small levers. It is economical of time and materials, andnot the least notable of its good qualities is its cleanliness. Itsinventor has been accustomed to do all his soldering of crown-and bridge-work without leaving the operating room. It can beused wherever illuminating gas is available. Any of the soldering GENERATION AND APPLICATION OF HEAT. 45 operations of the laboratory, from the largest piece of bridge-work to the most delicate joining of the narrowest bands or finestwires, are accomplished with equal facility. With illuminatinggas of good quality and sufficient pressure, a penn
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectdentist, bookyear1903
