. Canadian foundryman (1918). for its executionand extremely good and careful mould-ing. MAKING THE MOULD FOR THE RUNNER OF A WATER TURBINE. RECLAIMING FOUNDRY REFUSE In a letter to the CANADIAN FOUN-DRYMAN, Mr. R. A. Manigold, of theDings Magnetic Separator Co., has someinteresting things to say on the abovesubject. In these days when conservation isoccupying the minds of our manufactur-ers, Mr. Manigolds statement that from10 to 20 per cent, of the contents of thefoundry dump consists of good iron,which can be readily recovered by theuse of the magnetic separator, challen-ges atte
. Canadian foundryman (1918). for its executionand extremely good and careful mould-ing. MAKING THE MOULD FOR THE RUNNER OF A WATER TURBINE. RECLAIMING FOUNDRY REFUSE In a letter to the CANADIAN FOUN-DRYMAN, Mr. R. A. Manigold, of theDings Magnetic Separator Co., has someinteresting things to say on the abovesubject. In these days when conservation isoccupying the minds of our manufactur-ers, Mr. Manigolds statement that from10 to 20 per cent, of the contents of thefoundry dump consists of good iron,which can be readily recovered by theuse of the magnetic separator, challen-ges attention. He states that the ironso recovered is of good quality and thishas been proved by first melting it intopig, from which borings were taken andanalyzed, and found The pig wasthen melted and poured into small cast-ings, which were afterwards machinedall over and found to be good in all re-spects. He also instances recovery ofnails in steel foundries, citing a case 214 C A N A 1) I A N F 0 U N 1) R Y M A N Volume IRON FOUNDRY OF THE ORNAMENTAL BRONZE AND IRON WORKS where the stock of reclaimed nails wassufficient to keep the supply going forseveral months. He points out that in some cases in-dependent companies have found it pos-sible to make a profitable venture in re-working old foundry dumps, benefittingby the carelessness of the dumpers, whocould have utilized the lost metal pro-fitably by the separating process. Either hysteresis or its mechanicalanalogue, backlash, is present with start-ling regularity in every measuring in-strument, according to Mr. F. J. Schlinkin Engineering News Record. Evenin an automatic scale, where the partsmay all be subject to low workingstresses, and may be constructed withthe utmost care and nicety of fit, thescale readings exhibit the characteristicdivergence between the increasing load and decreasing load branches of the cor-rection curve, strikingly similar to thehysteresis loop met with in the stressexamination of a material.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjec, booksubjectfoundries
